研究者詳細

顔写真

チヨウ タイホウ
趙 大鵬
Dapeng Zhao
所属
大学院理学研究科 附属地震・噴火予知研究観測センター 観測研究部(沈み込み帯物理学分野)
職名
教授
学位
  • 理学博士(東北大学)

  • 理学修士(東北大学)

e-Rad 研究者番号
70304665

学歴 4

  • 東北大学大学院 理学研究科 地球物理学専攻 博士課程

    1988年4月 ~ 1991年3月

  • 東北大学大学院 理学研究科 地球物理学専攻 修士課程

    1986年4月 ~ 1988年3月

  • 北京大学 理学部 地球科学科

    1980年9月 ~ 1984年8月

  • Peking University Faculty of Science Department of Geoscience

    1980年9月 ~ 1984年8月

委員歴 5

  • Surveys in Geophysics誌 (Springer Nature), 副編集長

    2024年10月 ~ 継続中

  • 日本地震学会 代議員

    2024年4月 ~ 継続中

  • 日本地球惑星科学連合 代議員

    2000年4月 ~ 継続中

  • Polar Science誌 (Elsevier社) 副編集長

    2006年9月 ~ 2025年6月

  • Journal of Asian Earth Sciences 誌 (Elsevier社) 編集長

    2010年11月 ~ 2019年12月

所属学協会 5

  • 日本地球惑星科学連合

    1998年4月 ~ 継続中

  • European Geosciences Union

  • Seismological Society of America

  • American Geophysical Union

  • 日本地震学会

研究キーワード 7

  • 活火山

  • 地震の発生機構

  • マントルプルーム

  • ホットスポット

  • 沈み込み帯

  • 地震波トモグラフィー

  • 地球の構造

研究分野 1

  • 自然科学一般 / 固体地球科学 / 地球内部構造学

受賞 9

  1. AGU Fellow

    2024年9月 米国地球物理学連合 (AGU)

  2. JpGU Fellow

    2023年4月 日本地球惑星科学連合 (JpGU)

  3. 日本地震学会賞

    2023年3月 日本地震学会

  4. Highly Cited Research 賞

    2016年12月 Elsevier社

  5. AGU Research Spotlight

    2016年8月 米国地球物理学連合

  6. AGUに影響力の高い研究者に選出

    2016年6月 米国地球物理学連合

  7. Island Arc賞

    2014年6月 日本地質学会

  8. Elsevier社PEPI 誌 Top-1 Cited 論文

    2009年10月 Elsevier社

  9. Elsevier社PEPI 誌 Most Cited Paper賞

    2008年1月 Elsevier

︎全件表示 ︎最初の5件までを表示

論文 445

  1. Ghost plumes hidden beneath Earth’s continents 査読有り

    Simone Pilia, Giampiero Iaffaldano, D. Rhodri Davies, Mohammad Ismaiel, Paolo A. Sossi, Scott Whattam, Dapeng Zhao, Hao Hu

    Earth and Planetary Science Letters 666 119467 2025年9月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.epsl.2025.119467  

    ISSN:0012-821X

  2. Updated Pn wave anisotropic tomography and dynamics of the North China Craton 査読有り

    Weiwei Yin, Jianshe Lei, Rongyi Qian, Dapeng Zhao

    Tectonophysics 913 230878 2025年8月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2025.230878  

    ISSN:0040-1951

  3. Seismic tomography of the Pampean flat-slab subduction zone and its implications for volcanism and seismicity in the Central Andes 査読有り

    Rui Nie, Xin Liu, Dapeng Zhao

    Earth and Planetary Science Letters 669 119575 2025年8月

    DOI: 10.1016/j.epsl.2025.119575  

  4. Changbai intraplate volcanism and big mantle wedge 査読有り

    Dapeng Zhao, Genti Toyokuni, YoungHee Kim

    Physics of the Earth and Planetary Interiors 367 107425 2025年8月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2025.107425  

    ISSN:0031-9201

  5. Receiver-function imaging of the Moho discontinuity beneath the Tanlu fault zone and its tectonic implications 査読有り

    Tao Zhang, Jianshe Lei, Dapeng Zhao

    Geophysical Journal International 243 1-17 2025年8月1日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggaf298  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    Summary In this study we obtain 35 903 high-quality P-wave receiver functions from 1737 teleseismic events recorded at 120 dense broadband TanluArray temporary stations deployed in and around the Tanlu fault zone (TLFZ). After station azimuth and sediment correction are made, a detailed Moho depth distribution is obtained by CCP stacking. Our results show a sharp change in the Moho depth across the TLFZ from the west to east, which well corresponds to the surface geological structure. The deepest Moho (38.0 ∼ 40.0 km) occurs beneath the Dabie orogenic belt and the Sulu orogenic belt. The Moho beneath the Luxi uplift, Jiangnan orogenic belt and Jiaodong uplift is deeper (36.0 ∼ 37.0 km), whereas the Subei basin and the southern basin of the South Yellow Sea have a shallow Moho (28.0 ∼ 30.0 km). There is an obvious Moho uplift near Weifang, which corresponds to the Changle ancient volcano on the surface and may be a channel for upwelling of hot mantle material. The Moho is unclear under the fault zone near Tancheng, which is speculated to be a channel for upwelling of hot mantle material. It may be related to upwelling of hot and wet flows in the big mantle wedge above the subducted Pacific slab that is stagnant in the mantle transition zone beneath East Asia, which is a possible cause of the 1668 M8.5 Tancheng earthquake.

  6. Magmatic System of the Hainan Plume Revealed by Ambient Noise Tomography 査読有り

    Gong Deng, Jianshe Lei, Dapeng Zhao, Rui Gao

    Journal of Geophysical Research: Solid Earth 130 (7) e2024JB030696 2025年7月9日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2024jb030696  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract The magmatic system of the Hainan plume is important for unraveling the mechanism of intraplate volcanism. We develop a detailed three‐dimensional shear‐wave velocity (Vs) model of the crust and uppermost mantle using ambient noise tomography to investigate the magmatic system of the Hainan plume. Rayleigh wave phase velocity dispersions (5–40 s) are extracted from seismograms recorded at 74 broadband stations, including 32 Chinese provincial network stations and 42 portable stations of the Hainan Active Volcano Experiment of Seismic Array (HAVESArray). The integration of the HAVESArray data substantially improves the spatial resolution of the new Vs model. Our results show that high‐Vs zones mainly exist under southern Hainan Island and northern Leizhou peninsula, whereas low‐Vs zones appear primarily beneath the Beibuwan basin and the Leiqiong volcanic field. Two distinct low‐Vs zones are revealed beneath the Leiqiong volcanic field. The deeper zone exists at depths of 24–40 km and has a Vs reduction of ∼5%, whereas the shallower zone exists at depths of 12–20 km and has a Vs reduction of ∼8%. The two low‐Vs zones are connected vertically. These results suggest that the interconnected deep and shallow magma reservoirs may regulate the magma supply between the volcanic field and the Hainan mantle plume. Furthermore, seismic swarms in the Qiongshan area are predominantly located along the boundaries between high‐Vs and low‐Vs anomalies. We infer that the 1605 M7.5 Qiongshan earthquake was likely caused by the disruption of the overlying brittle crustal seal due to the rapid intrusion of the underlying magmatic fluids.

  7. Pn Velocity Structure and Anisotropy of the Uppermost Mantle Beneath Southeast Asia 査読有り

    Yuan Li, Jianshe Lei, Jinli Huang, Dapeng Zhao

    Journal of Geophysical Research: Solid Earth 130 (6) e2025JB031116 2025年6月24日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2025jb031116  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract Systematic investigation of the uppermost mantle structure beneath Southeast Asia is of great significance to understand the dynamics of oceanic plate subductions, continental collisions, and material upwelling associated with a mantle plume. To obtain high‐resolution images of Pn wave velocity structure and anisotropy of the uppermost mantle beneath Southeast Asia, we collect 182,875 high‐quality Pn arrival time data of 8,647 local earthquakes recorded at 860 stations from seismograms of temporary HAVESArray and permanent seismic networks in and around Hainan Island, as well as from the ISC‐EHB Bulletin. Our results generally align with previous findings but provide new insights into the tectonic evolution and dynamics of the Indochina block and the Hainan mantle plume. The Andaman‐Sumatra‐Java‐Timor and Philippine‐Taiwan‐Ryukyu arcs, associated with active volcanoes, exhibit prominent low‐velocity (low‐V) anomalies, whereas trenches and sea basins show higher velocities. Notably, the northwestern part of the Indochina block displays significant low‐V anomalies with an NW‐SE fast propagation direction (FPD), which are divided into two branches with dominant N‐S and NE‐SW FPDs at the northwest margin of the Khorat Plateau. This result suggests that southeastward mantle flow of the Indochina block bifurcates when encountering the Khorat Plateau. In addition, distinct velocity anomalies beneath the South China Sea and the southern Indochina block reflect unique traces of material upwelling from the Hainan mantle plume, contributing to the wide distribution of late Cenozoic basalts in Southeast Asia.

  8. A Narrow Magma Conduit of the Changbaishan Volcano Revealed by high-resolution Receiver Function Imaging 査読有り

    Dong Yan, You Tian, Dapeng Zhao

    Journal of Geophysical Research: Solid Earth 130 (6) e2024JB030535 2025年6月20日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2024jb030535  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract The Changbaishan volcano (CBV) is the largest Cenozoic intraplate stratovolcano in Northeast China. Although many seismic imaging studies have been conducted in the CBV area during the past two decades, the detailed crustal structure beneath the Tianchi caldera is still poorly understood due to the sparse seismic observations limited by the harsh natural conditions. In this study, we deployed dense linear seismic arrays along three slopes of the Changbaishan‐Tianchi volcanic area for the first time to obtain unprecedented high‐resolution images of the crustal structure by using the teleseismic receiver‐function imaging technique. Our results reveal detailed variations of crustal interface characteristics beneath the Tianchi caldera and adjacent areas. Several intracrustal interfaces are clearly revealed that correspond well to geological bodies, which might indicate boundaries of consolidated igneous bodies related to the primitive magmatic activities. A continuous Moho discontinuity at ∼37 km depth is revealed, whereas a weak Moho zone with a vertical offset of ∼4 km appears directly beneath the Tianchi caldera, which shows a clear positive correlation with the average crustal Vp/Vs ratio. We deem that the prominent crustal thickening and the higher Vp/Vs ratio beneath the Tianchi caldera might be closely associated with the complicated mantle‐derived mafic materials underplating at the crust‐mantle boundary. The joint effect of the multilevel magmatic plumbing system and a narrow magma conduit beneath the Tianchi caldera could account for the distinctive bimodal volcanic eruption history of the CBV.

  9. Fine Crustal Velocity Structure and Deep Mineralization in South China from Joint Inversion of Gravity and Seismic Data 査読有り

    Ao Li, Zhengyuan Jia, Guoming Jiang, Dapeng Zhao, Guibin Zhang

    Minerals 15 (7) 668-668 2025年6月20日

    出版者・発行元: MDPI AG

    DOI: 10.3390/min15070668  

    eISSN:2075-163X

    詳細を見る 詳細を閉じる

    The South China block (SCB) is characterized by complex tectonics, large-scale lithospheric deformation, and extensive mineralization in its southeastern region. However, the geodynamic processes and mechanisms driving mineralization remain controversial, partly due to the lack of information on its fine crustal structure. The resolution of crustal seismic tomography is relatively low due to the uneven distribution of local earthquakes in South China. In this study, we conduct a joint inversion of Bouguer gravity and seismic travel-time data to investigate the detailed 3-D P-wave velocity (Vp) structure of the crust beneath the SCB. Our results show the following: (1) strong lateral heterogeneities exist in the crust, which reflect the surface geology and tectonics well; (2) the Vp patterns at different depths beneath the Yangtze block are almost consistent, but those beneath the Cathaysia block vary significantly, which might be related to the lithosphere thinning in the Mesozoic; (3) decoupling between the upper crust and the lower crust occurs at ~20 km depth beneath the eastern SCB; (4) the Vp patterns vary beneath different metallogenic belts; and (5) distinct low-Vp anomalies exist in the lower crust beneath mineral deposits. These results suggest that the deep mineralization is closely associated with the lithospheric thinning and upwelling thermal flow in the Mesozoic beneath the eastern SCB. Our Vp tomographic result also strongly supports the viewpoint that the mineralization mechanism varies for different metallogenic belts.

  10. High-resolution Lithospheric Shear Velocity Structure of the Suqian Segment of the Tanlu Fault Zone From Ambient Noise Tomography 査読有り

    Chen Ma, Jianshe Lei, Dongping Wei, Dapeng Zhao

    Journal of Geophysical Research: Solid Earth 130 (5) e2024JB030717 2025年5月6日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2024jb030717  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract To understand causes of the Suqian seismic gap and the 1668 M8.5 Tancheng earthquake, we determine a new 3‐D S‐wave velocity (Vs) model of the lithosphere under the Suqian segment of the Tanlu fault zone in eastern China using ambient noise tomography. Rayleigh wave phase velocity dispersions at periods of 5–33 s are collected from seismograms recorded at our newly deployed TanluArray portable stations and permanent provincial seismic stations in and around the Suqian area. The addition of the TanluArray data leads to much higher tomographic resolution in the study region. Our model well depicts surface geological features and reveals strong lateral heterogeneities in and around the fault zone. Beneath the Suqian seismic gap, the upper crust and uppermost mantle show low‐velocity anomalies, whereas the middle and lower crust exhibit high‐velocity anomalies. Such a structure in the Suqian area may hinder the accumulation of tectonic stress, leading to the formation of a seismic gap. The Tancheng earthquake occurred in a transition zone between high‐ and low‐Vs anomalies in the middle crust, which is prone to stress accumulation and earthquake nucleation. The Tanlu fault zone serves as a channel for hot and wet mantle material upwelling into the crust, where fluids reduced the threshold for fault rupture and so triggered the Tancheng earthquake. The mantle upwelling may be related to dynamic processes in the big mantle wedge associated with stagnation and dehydration of the subducted Pacific slab in the mantle transition zone under East Asia.

  11. Crustal anisotropy and deformation in the South China Block 査読有り

    Longchun Qian, Jianshe Lei, Dapeng Zhao

    Journal of Asian Earth Sciences 289 106627 2025年4月24日

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2025.106627  

    ISSN:1367-9120

  12. Shear-wave tomography and cause of the 2021 Mw 7.4 Qinghai Maduo earthquake 査読有り

    Chao Wang, Jianshe Lei, Dapeng Zhao

    Seismological Research Letters 96 2822-2835 2025年4月15日

    出版者・発行元: Seismological Society of America (SSA)

    DOI: 10.1785/0220240436  

    ISSN:0895-0695

    eISSN:1938-2057

    詳細を見る 詳細を閉じる

    Abstract To better understand the cause of the 2021 Mw 7.4 Maduo earthquake in western China, we collect continuous waveforms recorded at 34 portable broadband MaduoArray seismic stations newly deployed from May 2021 to June 2023, as well as those from five permanent stations near the Maduo source area. Applying the ambient noise surface-wave direct tomography method to the data set, we determine detailed 3D crustal shear-wave velocity (VS) tomography of the Maduo source area. Our results show that the shallow VS structure closely correlates with surface geological features. Secondary fault zones in the study area are located at boundaries between high- and low-VS anomalies. The Maduo mainshock took place in a high-VS anomaly, whereas most aftershocks occurred near the transition zone of high- and low-VS anomalies in the upper crust. However, a large low-VS anomaly exists beneath the Maduo source area. Integrating with previous results, we deem that this low-VS anomaly may reflect fluids in the lower crustal flow, which entered a weak section of the seismogenic fault, reduced the effective normal stress, and so triggered the 2021 Maduo earthquake. Our tomographic results reveal detailed seismic structures around two seismic gaps near the Maduo mainshock hypocenter. The eastern gap is located in a stronger high-VS anomaly, whereas the western gap is in a weaker high-VS anomaly. Our two-year earthquake sequence data show that the western gap still exists, whereas the eastern gap eventually disappeared with time.

  13. Seismic evidence for large-scale intraslab heterogeneity beneath Northeast Japan 査読有り

    Jian Wang, Dengda Zhu, Zhigang Zhang, Jianming He, Ling Chen, Dapeng Zhao, Zhenxing Yao

    Journal of Geophysical Research: Solid Earth 130 (4) e2024JB030046 2025年4月5日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2024jb030046  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract Understanding the heterogeneity within a subducting slab is essential for elucidating its rheological properties, which can significantly affect subduction dynamics. Despite the importance, the fine structure of the slab has remained largely enigmatic due to the limited resolution of seismic tomography. Here, we utilize a deep learning approach, PickNet, to collect a comprehensive data set of arrival‐times of the first P and S waves from local earthquakes in Northeast Japan. This enables the determination of a high‐resolution () model of P‐wave velocity (Vp), S‐wave velocity (Vs), and Vp/Vs ratio within the subducting Pacific slab. Our model reveals a distinct intraslab structure characterized by relatively high Vp (>+3%), slightly high Vs (<+1%), and a high Vp/Vs ratio (>+1%), extending deep into the lithospheric mantle of the slab, approximately in size between longitudes 140.6°E and 142.0°E, and latitudes 39.8°N and 40.2°N beneath Northeast Japan. This anomalous structure is associated with a decrease or absence in lower‐plane intermediate‐depth seismicity of the double seismic zone within the slab. This result suggests that the presence of intrusive minerals, potentially affected by increased iron (Fe) content due to hot mantle upwelling, may reduce the viscosity of the slab at lithospheric depths and subsequently diminish the lower‐plane seismicity. Our results highlight the presence of rheological heterogeneity within the subducting slab, providing new insights into its role in impacting the deep structure and geodynamics of the Earth, potentially facilitating slab detachment or tearing.

  14. Oceanic subduction and craton underthrusting beneath the Bolivian orocline in Central Andes: Insight from anisotropic tomography 査読有り

    Zhaochen Dong, Xin Liu, Dapeng Zhao, Shujuan Zhao

    Geophysical Journal International 241 1762-1779 2025年4月1日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggaf123  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    Summary To clarify the 3-D crustal and upper mantle structure of the Bolivian orocline in the Central Andes, we conduct azimuthal anisotropy tomography using newly measured teleseismic fundamental mode Rayleigh-wave phase and amplitude data at periods of 25-110 s. Our tomography shows that the subducting Nazca slab is imaged as a high-velocity zone beneath the study region, except for areas where the Nazca ridge is subducting. Azimuthal anisotropy in the subducting slab generally exhibits trench-parallel fast-velocity directions (FVDs), but it becomes complex in and around the subducting Nazca ridge. Low-velocity anomalies with trench-normal FVDs exist in the mantle wedge beneath active arc volcanoes and backarc regions beneath Altiplano. A significant high-velocity zone with relative weak anisotropy exists in the crust of the overriding plate above the Peruvian flat slab in the study region. In contrast, low-velocity anomalies with trench-parallel FVDs are revealed in the crust beneath Altiplano. Furthermore, a high-velocity zone with depth-varying FVDs appears beneath Eastern Cordillera and its surrounding regions, which may indicate the westward underthrusting cratonic lithosphere. These tomographic features well capture the primary 3-D structure of the middle-lower crust and upper mantle beneath the Bolivian orocline, which results from the subduction of an oceanic lithosphere and the delamination and underthrust of a continental lithosphere, leading to the second-highest plateau on Earth.

  15. Anisotropic tomography and seismotectonics of the central Tanlu fault zone in East China 査読有り

    Guoqiang Ji, Jianshe Lei, Dapeng Zhao

    Geophysical Journal International 241 1413-1431 2025年3月20日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggaf104  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    Summary We determine detailed 3-D velocity and anisotropy models of the crust beneath the central segment of the Tanlu fault zone (TLFZ) in east China using hand-picked arrival times of direct waves (Pg, Sg), refracted waves (Pn, Sn), and the Moho reflected waves (PmP and SmS) of local earthquakes recorded at 55 portable seismic stations of our newly deployed TanluArray and 45 Chinese provincial stations. Our results show that the pattern of seismic velocity and anisotropy is in good agreement with surface geological and tectonic features in the study region. Along the TLFZ, obvious low-velocity (low-V) anomalies are visible in the lower crust in the north of the Cangni fault, whereas high-velocity (high-V) anomalies appear in the upper and middle crust. The 1668 Tancheng earthquake (M8.5) and small-to-moderate earthquakes occurred in the high-V zones but underlain by low-V anomalies. The low-V zones may reflect significant effects of fluids derived from hot and wet upwelling flow in the big mantle wedge. Under the Suqian seismic gap, low-V anomalies are clearly imaged in the middle crust, whereas high-V anomalies appear in the lower crust, suggesting the absence of fluids in the deep crust, which could explain why few earthquakes occurred there. The fast velocity direction (FVD) of P-wave azimuthal anisotropy changes with depth. The FVD is parallel with the TLFZ strike in the upper crust in and around the TLFZ, reflecting the strike-slip features of the fault zone. Our results provide new seismic constraints on the structure and tectonic evolution of the TLFZ.

  16. Whole-mantle tomography beneath eastern Mediterranean and adjacent regions 査読有り

    Genti Toyokuni, Dapeng Zhao

    Geophysical Journal International 241 1155-1172 2025年3月7日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggaf086  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    Summary The Mediterranean and its surrounding regions are characterized by strong interactions of the Eurasian, African and Arabian Plates, as well as several microplates, resulting in significant seismic and volcanic activities. In addition, this region has a complex history of plate movements, leading to the formation of distinct orogenies such as the Alps, Apennines, and Carpathians, as well as a complex distribution of subducted slabs in the mantle. Intermediate-depth earthquakes actively occur in the subducting Vrancea slab beneath Romania. Furthermore, volcanic activity in the Caucasus and Arabian Peninsula may be stimulated by mantle plumes. To better understand the complex tectonics and seismic and volcanic activities, we need to study the detailed 3-D structure of the crust and mantle beneath this region. However, previous studies did not thoroughly investigate the 3-D structure of the whole mantle, particularly the lower mantle. Here we apply the updated global tomography method to reveal the 3-D P-wave velocity (${V}_P$) structure of the whole mantle beneath this region. We use ∼7 million P, pP, PP, PcP, and Pdiff wave arrival times of 21,629 earthquakes recorded at 14,283 seismograph stations worldwide. The resulting ${V}_P$ tomography clearly shows stagnation of the subducted African and Tethys slabs above the 660-km discontinuity, although a portion of the slab penetrates the discontinuity and sinks into the lower mantle. A big mantle wedge (BMW) has formed above the stagnant slab, which may affect the surface topography and seismic activity such as the Vrancea intermediate-depth earthquakes. A window appears between the subducting Hellenic and Cyprus slabs. Given the development of subslab hot mantle upwelling (SHMU) beneath this region, an extensive volcanic eruption in the Aegean Sea area might be powered by a mixture of island arc magma and SHMU through the slab window. Intraplate volcanoes in the Arabian Peninsula and Caucasus may be fed by hot mantle plumes rising from the core-mantle boundary.

  17. Whole-mantle isotropic and anisotropic tomography beneath Japan and adjacent regions 査読有り

    Genti Toyokuni, Dapeng Zhao, Daisuke Takada

    Journal of Geophysical Research: Solid Earth 130 (3) e2024JB029593 2025年3月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2024jb029593  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract The Japan Islands and surrounding regions have complex structures and tectonics due to strong interactions of four lithospheric plates, including the subducting Pacific and Philippine Sea slabs beneath the Okhotsk and Amurian plates, which have caused catastrophic interplate and intraplate earthquakes, as well as arc and intraplate volcanoes. The subducted Pacific slab becomes flat within the mantle transition zone, forming a big mantle wedge above the flat slab, which stimulates intraplate volcanic activities in East Asia. Furthermore, subslab hot mantle upwelling (SHMU) beneath the subducting Pacific slab may contribute to various seismic and volcanic activities. However, SHMU was sometimes claimed to be an artificial ghost resulting from isotropic tomography. Seismic anisotropy tomography is crucial for addressing such issues, because it is a powerful tool to visualize flow field in the mantle. In this study, we first use an existing isotropic tomographic method called multiscale global tomography to reveal whole‐mantle isotropic P‐wave velocity structure beneath Japan and its surrounding regions. Then we develop a novel program that incorporates seismic anisotropy into multiscale global tomography, revealing whole‐mantle P‐wave azimuthal anisotropy beneath the study region. As a result, we find for the first time that, even when anisotropy is considered, SHMU beneath the subducting Pacific slab is clearly imaged, indicating that SHMU is not a ghost of isotropic tomography. Furthermore, beneath the Izu‐Bonin region, our anisotropic tomography clearly shows that the subducted slab is split into two blocks vertically in the lower mantle, indicating intermittent slab subductions.

  18. Late Cenozoic magmatism of the South China Sea driven by the Hainan mantle plume 査読有り

    Shaohong Xia, Tao Gou, Fang Zhao, Dapeng Zhao, Chaoyan Fan

    Science Bulletin 70 604-608 2025年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.scib.2024.12.010  

    ISSN:2095-9273

  19. Anisotropic tomography and seismotectonics of the Longmenshan fault zone in East Tibet 査読有り

    Xiaohui Hu, Jianshe Lei, Dapeng Zhao, Baoshan Wang

    Geophysical Journal International 241 (1) 184-202 2025年2月6日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggaf035  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    SUMMARY We invert 122 147 P, S, and PmP phase arrival-times from 1549 local earthquakes for both isotropic and azimuthally anisotropic lithospheric P-wave velocity structures beneath the region of the Longmenshan fault zone, China. The use of PmP data significantly improves the spatial resolution of the middle-lower crust tomography. Our results show that widespread low-Vp anomalies exist in the middle and lower crust of the Songpan–Ganzi block and the Chuandian block, which contribute most crustal anisotropy. Moderate and strong earthquakes mainly occurred in the high-Vp and low-Vp transition zone, and obvious low-Vp anomalies appear below the seismogenic zone, indicating that the occurrence of earthquakes is affected by crustal fluids. The upper-crust anisotropy is mainly controlled by the stress field and local faults. The fast Vp directions (FVDs) on the Longmenshan fault zone are NE–SW in the lower crust and uppermost mantle, suggesting that the material flow is blocked by the Sichuan basin, so the flow moves in the NE–SW direction. The FVDs in the Longmenshan fault zone are different from the core-phase SKS splitting measurements, suggesting that the crust and lithospheric mantle are decoupled there. Our anisotropy results also suggest that the thickening deformation of the upper crust and the middle-lower crustal flow jointly control the uplift and deformation of the Longmenshan mountain.

  20. The reservoir-induced 2023 Heyuan earthquake sequence in Guangdong, China and its geodynamic implications 査読有り

    Huimin Guan, Jianshe Lei, Dapeng Zhao, Xiaohui Hu

    Tectonophysics 902 230681 2025年2月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2025.230681  

    ISSN:0040-1951

  21. Relocation of the 2024 Ms 7.1 Wushi, Xinjiang, China earthquake sequence and implications for seismogenic structure 査読有り

    Penghu Guan, Jianshe Lei, Dapeng Zhao

    Journal of Asian Earth Sciences 279 106456 2025年2月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2024.106456  

    ISSN:1367-9120

  22. Crust and uppermost mantle S-wave velocity structure of the Wudalianchi volcanic belt from direct surface-wave tomography 査読有り

    Xiaoyan Song, Jianshe Lei, Dapeng Zhao, Yinshuang Ai

    Journal of Asian Earth Sciences 278 106426 2025年2月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2024.106426  

    ISSN:1367-9120

  23. Three-dimensional ray tracing in P-wave azimuthal anisotropic media 査読有り

    Ryo Tsunashima, Dapeng Zhao, Genti Toyokuni

    Geophysical Journal International 240 160-173 2025年1月10日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggae374  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    Summary A new 3-D ray tracing method is developed for P-wave azimuthal anisotropic (AAN) media. We assume anisotropic media with hexagonal symmetry and take advantage of the property that the AAN symmetry axis, the phase velocity vector, and the group velocity vector are located in the same plane. The 3-D ray tracing method that combines the pseudo-bending technique and Snell's law is improved for the AAN media. We compute isotropic (ISO) and AAN rays in synthetic models and an actual 3-D P-wave AAN model of the East Japan subduction zone. The accuracy of our ray tracing code is evaluated by comparing the ray-path and travel-time differences between the ISO and AAN rays. Our results show that the AAN rays in each model bend in the right direction and satisfy Fermat's principle, so the theory and approximations adopted in the calculations are reasonable. For long rays (>350 km), the ray-path difference between the ISO and AAN rays is > 20 km, and the travel-time difference is > 0.1 s, suggesting that it is necessary and important to take azimuthal anisotropy into account in the 3-D ray tracing.

  24. Lithospheric structure of Northeast China from dense array receiver functions: Insight into two-side subduction of the Paleo-Asian Ocean plate 査読有り

    Honghao Li, You Tian, Dapeng Zhao, Hongli Li

    Gondwana Research 139 166-178 2025年1月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.gr.2024.11.012  

    ISSN:1342-937X

  25. Teleseismic evidence for structural heterogeneity in East Japan forearc from seafloor S-net data 査読有り

    Motoya Suzuki, Dapeng Zhao, Genti Toyokuni, Ryota Takagi

    Tectonophysics 895 230579 2025年1月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2024.230579  

    ISSN:0040-1951

  26. Mantle structure, anisotropy, and dynamics of the Mendocino Triple Junction, northern California, USA 査読有り

    Ziqiang Yang, Dapeng Zhao, Yunpeng Dong, Bin Cheng

    Geological Society of America Bulletin 137 (1) 156-166 2025年1月1日

    出版者・発行元: Geological Society of America

    DOI: 10.1130/b37367.1  

    ISSN:0016-7606

    eISSN:1943-2674

    詳細を見る 詳細を閉じる

    We determined a detailed 3-D model of P-wave anisotropic tomography of the crust and upper mantle beneath the Mendocino Triple Junction (northern California, USA) by using a large number of high-quality P-wave travel-time data of local and teleseismic events recorded by the dense seismic network on the North American continent. Our results show the presence of a slab window and the upwelling asthenosphere material through the slab window directly contacts the surrounding plates. A high-velocity anomaly is revealed at depths of ∼300−400 km beneath the triple junction, which reflects a fragment of the Monterey microplate associated with breaking-off of the Farallon plate. Depth-varying seismic anisotropy occurs in the upper mantle and exhibits a circular pattern, which is mainly caused by 3-D mantle flow around the southern edge of the Gorda plate. Subduction-driven corner flow appears in the mantle wedge. After the Farallon plate first contacted the North American plate, as it broke apart and a slab window formed, the Pacific plate captured the plate remnant and moved northwestward together. Then the Monterey plate fractured and sank into the mantle, where it was subjected to shearing forces from both the Pacific and North American plates and moved to its current position.

  27. Uncovering the complexity of source mechanism in an anisotropic coal mine using sequential inversion

    Chun-Hui Song, Cai-Ping Lu, Xiu-Feng Zhang, Chao Wang, Jie-Fang Song, Yang Liu, Shi-Dong Li, Dapeng Zhao

    Scientific Reports 14 (1) 31495 2024年12月28日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s41598-024-83226-5  

    eISSN:2045-2322

  28. Accretionary wedge, arc magmatism and fluid migration in northern Sumatra: Insight from seismic attenuation tomography 査読有り

    Debiao Liu, Zewei Wang, Dapeng Zhao, Hao Hu, Rui Gao

    Journal of Geophysical Research: Solid Earth 129 (12) e2024JB029777 2024年12月16日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2024jb029777  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract The first three‐dimensional (3‐D) P and S wave attenuation (Qp and Qs) tomography of the crust and upper mantle of the northern Sumatra subduction zone is determined. We adopt an improved calculation scheme to precisely measure attenuation factor t* values from velocity amplitude spectral ratios among different stations that recorded the same earthquake. Our tomographic results show that the forearc accretionary wedge in Sumatra exhibits a significant high‐attenuation (low‐Q) zone along the trench. The seismic attenuation characteristics of the forearc accretionary wedge are probably influenced by variations in temperature and water content. The middle and upper crust beneath active arc volcanoes shows low‐Q and high‐Qp/Qs, while the lower crust exhibits less low‐Q and low‐Qp/Qs, probably reflecting hot volcanic roots with different water saturations from the upper to lower crust. Beneath the Toba volcano that had a super‐eruption ∼74,000 years ago, a distinct low‐Qp/Qs zone is revealed, which may reflect a transport pathway of fluids and/or local melts ascending from a slab window. The subducting Indo‐Australian slab beneath the forearc island chain exhibits a low‐Q and low‐Qp/Qs belt, reflecting a moderate water saturation probably associated with backthrust faulting. High‐Q and high‐Qp/Qs zones appear along the slab surface, reflecting large amounts of fluids releasing from the slab dehydration, which may increase pore pressure and cause intense intraslab seismicity.

  29. 地震波トモグラフィーから見た地震火山活動と地球内部ダイナミクス 招待有り 査読有り

    趙大鵬

    地震ジャーナル 78 13-31 2024年12月

    DOI: 10.60191/eqj.2024.78_13  

  30. Slab-plume interactions beneath Australia and New Zealand: New insight from whole-mantle tomography 査読有り

    Genti Toyokuni, Dapeng Zhao

    Geochemistry, Geophysics, Geosystems 25 (11) e2024GC011739 2024年11月26日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2024gc011739  

    ISSN:1525-2027

    eISSN:1525-2027

    詳細を見る 詳細を閉じる

    Abstract Australia, New Zealand, and the surrounding regions have experienced complex plate interactions with significant seismic and volcanic activities. The Taupo volcano on the North Island of New Zealand has experienced multiple catastrophic eruptions. Although Australia is known as a stable landmass with low seismic and volcanic activity, intraplate volcanoes along its eastern coast are considered to be caused by hot mantle plumes. To better understand the seismic and volcanic activities in the region, it is necessary to study the detailed 3‐D structure of the crust and mantle. Here we apply a well‐established global tomography method to reveal the 3‐D P‐wave velocity () structure of the whole mantle beneath this region. We used ∼7 million P, pP, PP, PcP, and Pdiff wave arrival times of 23,666 earthquakes recorded at 14,181 seismograph stations worldwide. The resulting tomography clearly shows high‐ subducted slabs, and low‐ anomalies above and below the slabs, which may reflect corner flow in the mantle wedge and subslab hot mantle upwelling (SHMU), respectively. A slab window is revealed beneath the North Island of New Zealand. Given the development of SHMU beneath this region, the catastrophic eruptions of the Taupo volcano might be powered by a mixture of island arc magma and SHMU through the slab window. Beneath the intraplate volcanoes along the eastern coast of Australia and the Tasman Sea, a thin low‐ zone exists and extends down to the core‐mantle boundary, suggesting that the intraplate volcanoes might be, at least partially, fed by a plume rising from the lower mantle.

  31. The magmatic plumbing beneath the Wudalianchi volcanic region, northeast China, is recharged by magma reservoirs under Keluo volcano 査読有り

    Ziqiang Lü, Jianshe Lei, Dapeng Zhao, Yi-Gang Xu, Lijun Liu, Changqing Sun, Yinshuang Ai, Tuncay Taymaz

    Communications Earth & Environment 5 (1) 575 2024年10月9日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s43247-024-01748-2  

    eISSN:2662-4435

  32. Upper mantle shear velocity structure of the Cathaysia Block and surrounding areas: New insight into deep geodynamics 査読有り

    Yao Xu, Qingtian Lü, Dapeng Zhao, Jiayong Yan, Danian Shi, Yongqian Zhang, Shuai Ruan, Zhiwu Xu, Changxin Chen, Wenwen Zhang, Xu Wang

    Tectonophysics 892 230542 2024年10月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2024.230542  

    ISSN:0040-1951

  33. Machine-learning based location of the 2021 Mw 7.4 Maduo, Qinghai, China earthquake sequence: Insight into intraplate seismogenesis 査読有り

    Penghu Guan, Jianshe Lei, Dapeng Zhao

    Tectonophysics 888 230458 2024年10月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2024.230458  

    ISSN:0040-1951

  34. Subduction-driven mantle flow beneath active back-arc basins inferred from seismic anisotropy tomography 査読有り

    Di Zhao, Xin Liu, Dapeng Zhao, Qingyu Qiao, Long Zhao

    Earth and Planetary Science Letters 643 118890 2024年10月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.epsl.2024.118890  

    ISSN:0012-821X

  35. Wudalianchi volcanism and mantle dynamics in Northeast China: New insight from Pn and Sn tomography 査読有り

    Mofei Du, Jianshe Lei, Dapeng Zhao, Yinshuang Ai, Hongbin Lu, Changqing Sun

    Physics of the Earth and Planetary Interiors 356 107260 2024年9月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2024.107260  

    ISSN:0031-9201

  36. Multiple Slabs and Complex Mantle Flows in the Molucca Sea Subduction Zone 査読有り

    Tianmeng Yuan, Zewei Wang, Dapeng Zhao, Rui Gao, Xiaofei Chen

    Geochemistry, Geophysics, Geosystems 25 (8) e2024GC011500 2024年8月13日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2024gc011500  

    ISSN:1525-2027

    eISSN:1525-2027

    詳細を見る 詳細を閉じる

    Abstract The Molucca Sea subduction zone is unique for its active divergent double‐subducted slab located in the north of the Java and Banda subduction zones. The spatial proximity of these subduction zones would cause a complex mantle flow field. To clarify the mantle dynamics, here we present P‐wave tilting‐axis anisotropic tomography obtained by inverting a large number of local and teleseismic travel‐time data recorded at 254 seismic stations in eastern Southeast Asia. Our results suggest that the mantle structure and dynamics of the western Molucca Sea subduction zone may be remotely controlled by the Java and Banda subduction zones. Mantle convection in the big mantle wedge west of the Molucca Sea subduction zone is possibly influenced by east‐west mantle flow associated with compression of the Indo‐Australian slab as well as north‐south mantle flow related to rollback of the Indo‐Australian slab. In contrast, the eastern Molucca Sea subduction zone is virtually unaffected by other subduction zones, probably due to the ongoing slab subduction there.

  37. Relocation of the 2021 Mw 7.4 Maduo, Qinghai, China earthquake sequence and implications for seismogenic structure 査読有り

    Penghu Guan, Jianshe Lei, Dapeng Zhao

    Journal of Asian Earth Sciences 274 106276 2024年8月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2024.106276  

    ISSN:1367-9120

  38. Anisotropic tomography of eastern Tibet and its uncertainty from hypocentral errors 査読有り

    Ruo Jia, Dapeng Zhao, Rizheng He

    Geophysical Journal International 238 1223-1236 2024年6月22日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggae221  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    Summary The mechanism responsible for the lateral expansion and uplift of the eastern Tibetan Plateau remains a topic of ongoing debate, partly due to discrepancies in the results of seismic velocity and anisotropy. In local earthquake tomography, hypocentral uncertainties can cause significant errors in the tomographic model. However, this issue has received limited attention in previous studies. In this work, we employ the weighted least-squares (WLS) method to solve the tomographic inversion problem. A power exponent coefficient, which is called weighting level, is introduced into the weighting matrix to control the relative contribution of the data with different hypocentral errors to the final tomographic result. Our data set contains high-quality Pg, Pn and Sg arrival times of local earthquakes recorded by the dense Chinese seismic network in eastern Tibet during 2008 to 2022. We comprehensively analyze the inversion results derived from the WLS inversions with different weighting levels to evaluate the robustness of isotropic velocity anomalies and azimuthal anisotropy. The most robust feature of our results is a striking low-velocity (low-Vp) zone surrounded by high-velocity (high-Vp) anomalies and fault parallel fast-velocity directions (FVDs) of azimuthal anisotropy in the lower crust beneath the western side of the Longmenshan fault zone. Taking into account many previous results of the region, we deem that the low-Vp zone reflects hot and wet upwelling flow from the deep asthenosphere, which ascends to the lower crust along the fault zone. At the NE margin of the Tibetan Plateau, significant low-Vp anomalies exist in the lower crust and the FVDs are consistent with the motion direction of the Tibetan block revealed by GPS observations. We think that lower crustal flow exists beneath NE Tibet, which controls the plateau expansion toward the northeast. A low-Vp anomaly appears at 30 km depth beneath the Sichuan Basin. However, as the weighting level increases, the amplitude of this low-Vp anomaly decreases by more than 6%, suggesting that this low-Vp anomaly has a larger uncertainty than the other features.

  39. Azimuthal seismic anisotropy in the crust beneath the Granada Basin (Spain) 査読有り

    I. Serrano, M.A. Dengra, F. Torcal, D. Zhao

    Tectonophysics 882 230360 2024年5月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2024.230360  

    ISSN:0040-1951

  40. Shear wave splitting and mantle dynamics of the southern Great Xing'an orogenic belt 査読有り

    Fei Gao, You Tian, Dapeng Zhao, Hongli Li, Cai Liu

    Tectonophysics 880 230336 2024年5月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2024.230336  

    ISSN:0040-1951

  41. Uppermost mantle structure and dynamics of the Tanlu fault zone: New insights from Pn anisotropic tomography 査読有り

    Hongbin Lu, Jianshe Lei, Dapeng Zhao

    Journal of Asian Earth Sciences 268 106170 2024年5月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2024.106170  

    ISSN:1367-9120

  42. Modification of Archean cratons in southern Africa with foundered segments dropped into the shallow lower mantle 査読有り

    Jiaji Xi, Youqiang Yu, Dapeng Zhao, Jiashun Hu

    Geology 52 468-472 2024年3月19日

    出版者・発行元: Geological Society of America

    DOI: 10.1130/g52023.1  

    ISSN:0091-7613

    eISSN:1943-2682

    詳細を見る 詳細を閉じる

    Subducted slabs have been detected in the lower mantle for almost 30 years, yet the presence of foundered cratonic segments in the lower mantle is still unclear and inadequately investigated. We present the first P-wave radial anisotropy tomography of southern Africa (our model SA-RAnis2024), which reveals a contrasting feature of preserved northwest and modified southeast Kalahari cratonic root. Segments from the modified cratonic lithosphere are inferred to have dropped into the shallow lower mantle where seismic evidence of isolated high-velocity anomalies are observed. We detect such a high-velocity anomaly under the southwest margin of the Kalahari craton, which possibly detached from the southeast Zimbabwe craton at ca. 60 Ma based on plate reconstructions. Foundered segments can be partially brought back up to shallow depths, and contribute to the geochemical heterogeneity of younger lithosphere, through large-scale mantle convection.

  43. Remnants of shifting early Cenozoic Pacific lower mantle flow imaged beneath the Philippine Sea Plate 査読有り

    Jianke Fan, Dapeng Zhao, Cuilin Li, Lijun Liu, Dongdong Dong

    Nature Geoscience 17 (4) 347-352 2024年3月12日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s41561-024-01404-6  

    ISSN:1752-0894

    eISSN:1752-0908

    詳細を見る 詳細を閉じる

    Abstract Seismic anisotropy could provide vital information about the evolution and internal convection of the deep Earth interior. Although previous seismological studies have revealed a wide distribution of seismic anisotropy in the upper portion of the lower mantle beneath many subduction zones, the existence of anisotropy at these depths away from subducted slabs remains debated. Here we use P-wave azimuthal anisotropy tomography to image the crust and mantle down to 1,600-km depth. We find prominent anisotropic patterns in the upper portion of the lower mantle beneath the Philippine Sea Plate. Substantial azimuthal anisotropy with N–S fast-velocity directions occurs at 700–900-km depths. We interpret this azimuthal anisotropy as a remnant of the Pacific lower mantle flow field about 50 million years ago. Two isolated high-velocity anomalies at 700–1,600-km depths may be vestigial pieces of the subducted Izanagi slab with seismic velocity features suggesting a shift in the Pacific lower mantle flow field by about 40 million years ago. Our findings provide seismic evidence for the existence of complex lower mantle flows and deformation mechanisms away from subduction zones.

  44. Tilting‐Axis Anisotropic Tomography and Subduction Dynamics of the Java‐Banda Arc 査読有り

    Fan Xie, Zewei Wang, Dapeng Zhao, Rui Gao, Xiaofei Chen

    Geophysical Research Letters 51 (5) e2023GL107720 2024年3月5日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2023gl107720  

    ISSN:0094-8276

    eISSN:1944-8007

    詳細を見る 詳細を閉じる

    Abstract The 180° curvature of the Banda arc at the eastern end of the Java‐Banda subduction zone reflects complicated geodynamic processes. A detailed investigation of its anisotropic structure would reveal its subduction dynamics, further resolving the controversial issue on how the highly arcuate Banda arc formed. We apply tilting‐axis anisotropic tomography to obtain a high‐resolution 3‐D anisotropic model beneath the Java‐Banda region. Our results show significant differences between Java and Banda in the pattern of anisotropy in both the subducting slab and its surrounding mantle, which reflect two distinctly different deformation modes in the two domains. Our results support the single‐slab subduction model for the Banda region. In addition, trench‐normal and upright fast‐velocity‐planes appear in the deep upper mantle, which may indicate material migrations in the big mantle wedge. Fast‐velocity‐planes in the shallow mantle exhibit a toroidal distribution, reflecting past counter‐clockwise rotation and asthenospheric material extrusion.

  45. Structure and dynamics of southern Mariana margin: Constraints from seismicity, tomography and focal mechanisms 査読有り

    Xinyang Wang, Shaohong Xia, Hongfeng Yang, Han Chen, Dapeng Zhao

    Tectonophysics 878 230300 2024年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2024.230300  

    ISSN:0040-1951

  46. Subduction transforms azimuthal anisotropy in the Juan de Fuca plate 査読有り

    Xingyu Ren, Xin Liu, Dapeng Zhao

    Tectonophysics 877 230272 2024年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2024.230272  

    ISSN:0040-1951

  47. Cause of Enigmatic Upper-Mantle Earthquakes in Central Wyoming 査読有り

    Dapeng Zhao, Xuran Liang, Genti Toyokuni, Yuanyuan Hua, Yi-Gang Xu

    Seismological Research Letters 95 (4) 2497-2505 2024年2月29日

    出版者・発行元: Seismological Society of America (SSA)

    DOI: 10.1785/0220230333  

    ISSN:0895-0695

    eISSN:1938-2057

    詳細を見る 詳細を閉じる

    Abstract Earthquakes deeper than 60 km generally occur in subducting slabs. However, on 21 September 2013 two earthquakes (M 4.8 and 3.0) occurred at ∼71 to 75 km depths in the upper mantle beneath central Wyoming in the stable North American continent, where there is no actively subducting slab at present. The cause of the two events is still unclear. Here, we present detailed 3D P-wave isotropic and anisotropic tomography down to 750 km depth under Wyoming and adjacent areas. Our result shows that the two Wyoming events took place within a high-velocity (high-V) body at 0–160 km depths, which may be part of dense continental lithosphere. Another high-V body exists at ∼300 to 500 km depths, which may reflect a remnant of the subducted Farallon slab. A significant low-velocity (low-V) zone appears at ∼200 to 300 km depths between the two high-V bodies, and the low-V zone exhibits seismic anisotropy that VP is greater in the vertical direction than that in the horizontal direction. The low-V zone may include ascending fluids from dehydration of the subducted slab remnant, which was promoted by the nearby hot Yellowstone plume. It is highly possible that the ascending fluids induced the 2013 Wyoming upper-mantle earthquakes.

  48. Anisotropic tomography and mantle dynamics of the North China Craton 査読有り

    Huili Guo, Dapeng Zhao, Zhifeng Ding

    Geophysical Journal International 236 1455-1470 2024年1月18日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggad497  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    Summary We present high-resolution 3-D images of isotropic P wave velocity (Vp), azimuthal anisotropy (AAN), and radial anisotropy (RAN) down to 700 km depth beneath the North China Craton (NCC) and adjacent areas, which are obtained by inverting a great number of high-quality arrival time data recorded at 1 374 portable seismic stations and 635 permanent stations in the study region. Our results reveal new and detailed features of the upper mantle structure beneath the NCC. Varying structural heterogeneities are revealed beneath different tectonic blocks, and differences also exist between northern and southern parts of each block. The fast velocity directions (FVDs) of azimuthal anisotropy are mainly NW-SE under the Alaxa block, and NE-SW beneath the Tibetan Plateau. The FVDs present an arc transition along the boundary faults separating the Tibetan Plateau, the Alaxa block, the western NCC and the Sichuan basin. Low-Vp anomalies with positive RANs (i.e. horizontal Vp > vertical Vp) are revealed at 100-200 km depths under the Tibetan Plateau, reflecting frozen-in anisotropy in the thick lithosphere. Significant low-Vp anomalies with a circular AAN pattern exist at 0-700 km depths beneath the Datong volcano. In addition, negative RAN occurs right below the volcano, whereas positive RANs appear around it, suggesting that the Datong volcano is fed by hot upwelling flow from the lower mantle associated with collapsing of subducted slab materials down to the lower mantle. The eastern NCC shows complex Vp AANs and RANs. Seismic anisotropy exhibits east-west variations in the upper mantle across the Tanlu fault zone. The west of the Tanlu fault shows negative RANs (vertical Vp > horizontal Vp), whereas its east shows positive RANs at 300-500 km depths. The low-Vp anomaly under the Datong volcano is connected with a large low-Vp anomaly beneath the eastern NCC above ∼250 km depth, suggesting that the hot upwelling flow under Datong may migrate laterally to the asthenosphere under the eastern NCC and contribute to the lithospheric delamination and destruction there.

  49. Seismic evidence for break-off of the Molucca Sea slab 査読有り

    Tianmeng Yuan, Zewei Wang, Dapeng Zhao, Rui Gao, Xiaofei Chen

    Tectonophysics 874 230218 2024年1月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2024.230218  

    ISSN:0040-1951

  50. Big Mantle Wedge and Intraplate Volcanism in Alaska: Insight From Anisotropic Tomography 査読有り

    Xuran Liang, Dapeng Zhao, Yuanyuan Hua, Yi‐Gang Xu

    Journal of Geophysical Research: Solid Earth 129 (1) e2023JB027617 2024年1月1日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2023jb027617  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract We determine high‐resolution tomographic models of isotropic P‐wave velocity (Vp) and tilting‐axis anisotropy of the Alaska subduction zone using a large number of local and teleseismic data recorded at many portable and permanent network stations in and around Alaska. We find a flat high‐Vp slab in the mantle transition zone (410–670 km depths) beneath western Alaska, which is connected with the subducting Pacific slab at 0–410 km depths, suggesting that a big mantle wedge has formed under western Alaska. Our tilting‐axis anisotropy model reveals complex mantle flows in the asthenosphere. Corner flow in the mantle wedge above the subducting Pacific slab and toroidal flow in the big mantle wedge are revealed, which may cause the Cenozoic intraplate volcanoes in western Alaska and the Bering Sea. In central Alaska, the mantle wedge beneath the Denali volcanic gap is characterized by high‐Vp and subhorizontal fast velocity directions normal to the volcanic arc, which may reflect a remnant of the subducted Yakutat slab. In SE Alaska, the shallow subduction of the Wrangell slab is visible above 150 km depth, and hot mantle upwelling through the Wrangell‐Yakutat slab gap may contribute to the Wrangell volcanic field.

  51. Mapping Mantle Flows and Slab Anisotropy in the Cascadia Subduction Zone 査読有り

    Xuran Liang, Dapeng Zhao, Yuanyuan Hua, Yi‐Gang Xu

    Geophysical Research Letters 50 (23) e2023GL105527 2023年12月2日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2023gl105527  

    ISSN:0094-8276

    eISSN:1944-8007

    詳細を見る 詳細を閉じる

    Abstract The Cascadia margin is an unusual subduction zone characterized by the downdip movement of young and thin oceanic plates, where mantle flow and intraslab deformation are still unclear. Here we present new anisotropic tomography of the Cascadia subduction zone, in which the hexagonal symmetry axis of anisotropy is tilting rather than horizontal or vertical as assumed in previous studies of seismic anisotropy. Subduction‐induced entrained and toroidal flows under the Cascadia margin are discriminated well by the spatial relationship between tilting‐axis anisotropy and slab geometry. The obliquely entrained flow is trapped in a narrow zone (<100 km wide) above and below the subducting slab and reaches ∼200 km depth, which is surrounded by large‐scale sub‐horizontal toroidal flow. The intraslab anisotropy is trench‐normal above 80 km depth but changes to trench‐parallel at 100–400 km depths, which may reflect fossil anisotropy overprinted by deep deformation beneath the arc, or joint effect of serpentinization and hydrous faulting.

  52. Ancient slabs beneath Arctic and surroundings: Izanagi, Farallon, and in-betweens 査読有り

    Genti Toyokuni, Dapeng Zhao

    Progress in Earth and Planetary Science 10 (1) 64 2023年11月8日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1186/s40645-023-00595-7  

    eISSN:2197-4284

    詳細を見る 詳細を閉じる

    Abstract A detailed 3-D tomographic model of the whole mantle beneath the northern hemisphere (north of ~ 30°N latitude) is obtained by inverting a large amount of P-wave arrival time data (P, pP, and PP) to investigate transition of subducted slabs beneath Eurasia–Arctic–North America. We apply an updated global tomographic method that can investigate the whole mantle 3-D structure beneath a target area with high resolution comparable to that of regional tomography. The final tomographic model is obtained by performing independent calculations for 12 different target areas and stitching together the results. Our model clearly shows the subducted Izanagi and Farallon slabs penetrating into the lower mantle beneath Eurasia and North America, respectively. In the region from Canada to Greenland, a stagnant slab lying below the 660-km discontinuity is revealed. Because this slab has a texture that seems to be due to subducted oceanic ridges, the slab might be composed of the Farallon and Kula slabs that had subducted during ~60–50 Ma. During that period, a complex rift system represented by division between Canada and Greenland was developed. The oceanic ridge subduction and hot upwelling in the big mantle wedge above the stagnant slab caused a tensional stress field, which might have induced these complex tectonic events.

  53. Deep geodynamics and metallogenic mechanism of the South China block: New insight from mantle tomography 査読有り

    Shiying Li, Guoming Jiang, Dapeng Zhao, Guibin Zhang, Qingtian Lü, Danian Shi, Guangbin Chai

    Tectonophysics 869 230107 2023年11月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2023.230107  

    ISSN:0040-1951

  54. Shear-wave tomography of the Changbai volcanic area in NE China derived from ambient noise and seismic surface waves 査読有り

    Honghao Li, You Tian, Dapeng Zhao, Rajesh Kumar, Hongli Li, Dong Yan, Cai Liu

    Journal of Asian Earth Sciences 258 105482 2023年11月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2022.105482  

    ISSN:1367-9120

  55. Seismic evidence for collisional tectonics of the North China and Yangtze blocks in the Tongbai-Dabie orogenic belt 査読有り

    Hongwei Zheng, Dapeng Zhao, Rizheng He, Hui Yang, Xiao Niu, Zongxu Li

    Journal of Asian Earth Sciences 258 105878 2023年10月9日

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2023.105878  

    ISSN:1367-9120

  56. Detached Pacific Slab Beneath the Philippine Sea Plate and Its Geodynamical Implications 査読有り

    Jianke Fan, Dapeng Zhao, Cuilin Li, Dongdong Dong

    Geochemistry, Geophysics, Geosystems 24 (10) e2023GC010883 2023年10月2日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2023gc010883  

    ISSN:1525-2027

    eISSN:1525-2027

    詳細を見る 詳細を閉じる

    Abstract Formation and evolution of the Philippine Sea Plate (PSP) are still highly debated, mainly because the PSP has been surrounded by subduction zones since its inception. Therefore, it is vital to determine a new tomographic model with higher resolution to precisely portray the subducted slabs beneath and around the PSP, in particular, the subducted Pacific slab that has played an essential role in the PSP formation and evolution. In this study, an updated tomographic model is obtained by inverting a large number of P‐wave arrival times of local and regional earthquakes in and around the PSP. Our tomography reveals a detached piece of the Pacific slab in the mantle transition zone beneath the middle PSP, which may be mainly related to the PSP clockwise rotation and transform or strike‐slip faults in this region. The detached Pacific slab may promote the formation and evolution of the Shikoku and Parece‐Vela basins and the Mariana Trough by inducing hot mantle upwelling. Our tomography also reveals isolated high‐velocity anomalies beneath the southernmost PSP, which may reflect remnants of the subducted slab at the beginning of the PSP formation. A high‐velocity gap appears beneath the southern PSP, which may reflect the influence of a mantle plume.

  57. P and S Wave Anisotropic Tomography of the Banda Subduction Zone 査読有り

    Yuanyuan Hua, Dapeng Zhao, Yi‐Gang Xu

    Geophysical Research Letters 50 (18) e2023GL105611 2023年9月16日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2023gl105611  

    ISSN:0094-8276

    eISSN:1944-8007

    詳細を見る 詳細を閉じる

    Abstract In subduction zones with slab‐slab interactions, the pattern of mantle convection is very complex and still unclear. In this study, we jointly invert a large number of P and S wave arrival time data of local earthquakes for 3‐D isotropic and anisotropic velocity structures of the Banda subduction zone. Along the curved Banda arc, the subducting Indo‐Australian slab is detected clearly as a high‐velocity zone, and its azimuthal anisotropy changes along the arc strike, representing fossil anisotropy within the slab and modified anisotropy by the subduction processes. Around the northern edge of the Banda slab, a semi‐toroidal pattern of anisotropy appears in low‐velocity anomalies, representing mantle flow extruded from the Banda arc and escaped from a gap of the Banda‐Molucca slab toward the northeast. Our 3‐D anisotropic tomography uncovers the mantle convection pattern induced by the slab‐slab interactions, shedding new light on the complex dynamical processes in this curved subduction zone.

  58. Seismicity and magmatic system of the Changbaishan intraplate volcano in East Asia 査読有り

    Dong Yan, You Tian, Dapeng Zhao, Hongli Li

    Journal of Geophysical Research: Solid Earth 128 e2023JB026853 2023年9月11日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2023jb026853  

    ISSN:2169-9313

    eISSN:2169-9356

    詳細を見る 詳細を閉じる

    Abstract A high‐precision earthquake catalog is made from continuous waveform data recorded at 360 portable seismographs deployed for one month in the Changbaishan‐Tianchi volcanic area based on an automatic earthquake detection and location workflow. Then we investigate detailed 3‐D structures of P and S wave velocities (Vp and Vs) and Vp/Vs ratio of the crust beneath the study region. Our results reveal a high‐Vp/Vs zone accompanied with active volcanic earthquakes beneath the Tianchi caldera at ∼5 km depth, which may reflect a magma chamber. The intense seismic activities within 2 km depth beneath the Tianchi caldera from 2002 to 2005 occurred directly above the magma chamber revealed by this study, which could be related to upward migration of high‐pressure volatiles originating from the magma chamber. A potential middle‐crustal magma chamber might provide continuous magmatic materials feeding the upper‐crust magma chamber and lead to ruptures of surrounding rocks, resulting in two swarms of volcanic seismicity during the observation period. We deem that the diverse eruption styles of the Changbaishan volcano are closely associated with the multilevel structure of magma chambers in the upper and middle crust.

  59. Seismic anisotropy tomography beneath La Palma in the Canary Islands, Spain 査読有り

    I. Serrano, M.A. Dengra, F.J. Almendros, F. Torcal, D. Zhao

    Journal of Volcanology and Geothermal Research 441 107870 2023年7月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jvolgeores.2023.107870  

    ISSN:0377-0273

  60. New seismic constraints on arc magmatism and subduction dynamics beneath the Japan Islands from Sn tomography 査読有り

    Mofei Du, Jianshe Lei, Dapeng Zhao

    Journal of Asian Earth Sciences 256 105802 2023年7月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2023.105802  

    ISSN:1367-9120

  61. A slab window beneath North Sumatra revealed by P‐wave mantle tomography 査読有り

    Hao Hu, Dapeng Zhao, Jian Lin, Simone Pilia

    Journal of Geophysical Research: Solid Earth 128 (6) e2022JB025976 2023年6月17日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022jb025976  

    ISSN:2169-9313

    eISSN:2169-9356

  62. Anisotropic tomography of the East Japan subduction zone: influence of inversion algorithms 査読有り

    Ruo Jia, Dapeng Zhao

    Geophysical Journal International 234 2199-2213 2023年5月12日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggad197  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    Summary An important element of seismic tomography is the inversion process. In this work we use P-wave arrival times of local earthquakes recorded at onshore and offshore seismic stations in East Japan to investigate the influence of two well-known inversion algorithms (LSQR and L-BFGS-B) on anisotropic tomography. Our synthetic tests show that a large damping parameter in the LSQR algorithm can lead to a stable and fast convergence, but it can result in many small value disturbances. The L-BFGS-B algorithm, which has second-order convergence, could converge fast to the optimal solution without damping regularization, but an inappropriate bound on the unknown parameters makes them hard to be recovered fully and causes strong trade-off between isotropic velocity and azimuthal anisotropy. If appropriate control parameters are adopted, the two inversion algorithms lead to almost the same results, though the L-BFGS-B provides a more efficient convergence and leads to a slightly better fit to the data than LSQR does. The two algorithms are applied to investigate the 3-D P-wave velocity (Vp) structure and azimuthal anisotropy of the East Japan subduction zone. Our results show that high-Vp anomalies and trench-normal fast-velocity directions (FVDs) exist in the forearc crust beneath the Pacific Ocean off South Hokkaido, which may reflect a cold and hydrated forearc crust with aligned microcracks or fractures. Significant low-Vp anomalies and trench-parallel FVDs exist at 40–80 km depths beneath Hokkaido, reflecting a water-rich mantle wedge with aligned B-type olivine. In the subducting Pacific slab, strong anisotropy with trench-parallel FVDs is revealed, reflecting localized horizontal bending of the slab.

  63. Seismic anisotropy and geodynamics of the East Japan subduction zone 査読有り

    Dapeng Zhao, Jian Wang, Zhouchuan Huang, Xin Liu, Zewei Wang

    Journal of Geodynamics 156 101975 2023年5月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jog.2023.101975  

    ISSN:0264-3707

  64. The 4 January 2020 offshore Pearl River Estuary earthquake sequence in South China: Implications for seismic potential of the NW-striking local faults 査読有り

    Shaohong Xia, Jiangnan Lin, Dapeng Zhao, Jinghe Cao, Changrong Zhang, Xinyang Wang, Kuiyuan Wan, Chaoyan Fan

    Journal of Asian Earth Sciences 258 105697 2023年5月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2023.105697  

    ISSN:1367-9120

  65. Seismic evidence for slab detachment beneath the Taiwan Orogen 査読有り

    Wenhui Quan, Xin Liu, Dapeng Zhao, Sanzhong Li

    Earth and Planetary Science Letters 610 118131 2023年5月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.epsl.2023.118131  

    ISSN:0012-821X

  66. Magmatic System and Seismicity of the Arxan Volcanic Group in Northeast China 査読有り

    Jie Li, You Tian, Dapeng Zhao, Dong Yan, Zhiqiang Li, Hongli Li

    Geophysical Research Letters 50 (6) e2022GL101105 2023年3月13日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022gl101105  

    ISSN:0094-8276

    eISSN:1944-8007

  67. Hot mantle upwelling and Mesozoic mineralization in Southeast China 査読有り

    Jiaji Xi, Guoming Jiang, Dapeng Zhao, Guibin Zhang, Lijuan She, Qingtian Lü, Danian Shi

    Journal of Asian Earth Sciences 258 105648 2023年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2023.105648  

    ISSN:1367-9120

  68. Seismic imaging of the Java subduction zone: New insight into arc volcanism and seismogenesis 査読有り

    Fan Xie, Zewei Wang, Dapeng Zhao, Rui Gao, Xiaofei Chen

    Tectonophysics 854 229810 2023年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2023.229810  

    ISSN:0040-1951

  69. The Adriatic Thrust Fault of the 2021 Seismic Sequence Estimated from Accurate Earthquake Locations Using sP Depth Phases 査読有り

    Raffaele Di Stefano, Maria Grazia Ciaccio, Paola Baccheschi, Dapeng Zhao

    Bulletin of the Seismological Society of America 113 (1) 480-493 2023年1月26日

    出版者・発行元: Seismological Society of America (SSA)

    DOI: 10.1785/0120220111  

    ISSN:0037-1106

    eISSN:1943-3573

    詳細を見る 詳細を閉じる

    ABSTRACT An earthquake sequence occurred in the Central Adriatic region during March–June 2021. This sequence started on 27 March with a mainshock of moment magnitude (Mw) 5.2 occurring at 13:47 coordinated universal time (UTC). No foreshock was observed before this mainshock. The sequence lasted approximately three months, until the end of June 2021. Approximately 200 seismic events were recorded by the regional seismic network during this time, including four M ≥ 4.0 earthquakes. The 27 March 2021 earthquake was one of the strongest instrumentally recorded events in the area bounded approximately by the Ancona–Zadar line to the north and the Gargano–Dubrovnik line to the south. The mainshock originated at a focal depth of 9.9 km. The seismicity spread from the mainshock up-dip and down-dip along a northeast-dipping plane. Here, we investigate the geometry of the fault activated by this seismic sequence by using sP depth phases. We aim to significantly reduce the large uncertainties associated with the hypocentral locations of offshore earthquakes beneath the Adriatic Sea—an area that plays a fundamental role in the geodynamics of the Mediterranean. These refined earthquake locations also allow us to make inferences with regards to the seismotectonic context responsible for the analyzed seismicity, thus identifying a structure (here referred to as the Mid-Adriatic fault) consisting of a northwest–southeast-striking thrust fault with a ∼35° northeast-dipping plane. The use of depth-phase arrival times to constrain off-network event locations is of particular interest in Italy due to both the peculiar shape of the peninsula and the extreme scarcity of seafloor stations, the cost and management of which are very expensive and complex. Here, we present the first attempt to apply this off-network locating technique to the Italian offshore seismicity research with the aim of improving hazard estimations in these hard-to-monitor regions.

  70. Seismic Anisotropy Tomography and Mantle Dynamics 査読有り

    Dapeng Zhao, Xin Liu, Zewei Wang, Tao Gou

    Surveys in Geophysics 44 947-982 2023年1月16日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1007/s10712-022-09764-7  

    ISSN:0169-3298

    eISSN:1573-0956

    詳細を見る 詳細を閉じる

    Abstract Seismic anisotropy tomography is the updated geophysical imaging technology that can reveal 3-D variations of both structural heterogeneity and seismic anisotropy, providing unique constraints on geodynamic processes in the Earth’s crust and mantle. Here we introduce recent advances in the theory and application of seismic anisotropy tomography, thanks to abundant and high-quality data sets recorded by dense seismic networks deployed in many regions in the past decades. Applications of the novel techniques led to new discoveries in the 3-D structure and dynamics of subduction zones and continental regions. The most significant findings are constraints on seismic anisotropy in the subducting slabs. Fast-velocity directions (FVDs) of azimuthal anisotropy in the slabs are generally trench-parallel, reflecting fossil lattice-preferred orientation of aligned anisotropic minerals and/or shape-preferred orientation due to transform faults produced at the mid-ocean ridge and intraslab hydrated faults formed at the outer-rise area near the oceanic trench. The slab deformation may play an important role in both mantle flow and intraslab fabric. Trench-parallel anisotropy in the forearc has been widely observed by shear-wave splitting measurements, which may result, at least partly, from the intraslab deformation due to outer-rise yielding of the incoming oceanic plate. In the mantle wedge beneath the volcanic front and back-arc areas, FVDs are trench-normal, reflecting subduction-driven corner flows. Trench-normal FVDs are also revealed in the subslab mantle, which may reflect asthenospheric shear deformation caused by the overlying slab subduction. Toroidal mantle flow is observed in and around a slab edge or slab window. Significant azimuthal and radial anisotropies occur in the big mantle wedge beneath East Asia, reflecting hot and wet upwelling flows as well as horizontal flows associated with deep subduction of the western Pacific plate and its stagnation in the mantle transition zone. The geodynamic processes in the big mantle wedge have caused craton destruction, back-arc spreading, and intraplate seismic and volcanic activities. Ductile flow in the middle-lower crust is clearly revealed as prominent seismic anisotropy beneath the Tibetan Plateau, which affects the generation of large crustal earthquakes and mountain buildings.

  71. Slab morphology around the Philippine Sea: New insights from P‐wave mantle tomography 査読有り

    Lijuan She, Guibin Zhang, Guoming Jiang, Dapeng Zhao, Jiaji Xi, Qingtian Lü, Danian Shi

    Journal of Geophysical Research: Solid Earth 128 (1) e2022JB024757 2023年1月10日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022jb024757  

    ISSN:2169-9313

    eISSN:2169-9356

  72. Older magma at Aso caldera than at Unzen stratovolcano in south west Japan as recorded through helium isotopes 査読有り

    Yuji Sano, Takanori Kagoshima, Maoliang Zhang, Naoto Takahata, Tetsuji Onoue, Tomo Shibata, Yoshiro Nishio, Ai-Ti Chen, Hyunwoo Lee, Tobias P. Fischer, Dapeng Zhao

    Communications Earth & Environment 4 (1) 1-8 2023年1月4日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s43247-022-00649-6  

    eISSN:2662-4435

  73. Fine Structure of the Subducting Slab and the 2022 M7.4 Fukushima–Oki Intraslab Earthquake 査読有り

    Zewei Wang, Dapeng Zhao, Xiaofei Chen

    Seismological Research Letters 94 (1) 17-25 2023年1月2日

    出版者・発行元: Seismological Society of America (SSA)

    DOI: 10.1785/0220220234  

    ISSN:0895-0695

    eISSN:1938-2057

    詳細を見る 詳細を閉じる

    Abstract The 16 March 2022 M 7.4 Fukushima–Oki earthquake is the largest one among forearc intraslab earthquakes in Japan since 2000. These subcoast events can cause severe damage to the local society because of their proximity to inhabited areas. However, their generating mechanism is still not clear. Here, we present 3D high-resolution seismic tomography of the source zone of four large intraslab events (M ≥7.0) during 2003–2022 in northeast Japan, which is obtained by inverting high-quality arrival-time data recorded at both onshore and offshore seismic stations. Aftershocks of the subcoast intraslab earthquakes are mainly distributed in gaps of high-velocity bodies with high Poisson’s ratio and at the upper ∼20 km depth of the subducting Pacific slab. Our results indicate that the four large intraslab events were caused by rupturing of buried hydrated faults that formed at the outer rise and dehydration embrittlement on the fault planes.

  74. Robust Seismic Images of the Hawaiian Plume 査読有り

    Chuanwei Ye, Xin Liu, Dapeng Zhao, Shujuan Zhao

    Geophysical Research Letters 49 (23) e2022GL100707 2022年12月16日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022gl100707  

    ISSN:0094-8276

    eISSN:1944-8007

  75. Seismic anisotropy tomography and mantle dynamics of central‐eastern USA 査読有り

    Xuran Liang, Dapeng Zhao, Yuanyuan Hua, Yi‐Gang Xu

    Journal of Geophysical Research: Solid Earth 127 (12) e2022JB025484 2022年11月25日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022jb025484  

    ISSN:2169-9313

    eISSN:2169-9356

  76. Mantle tomography of central‐eastern USA: Influence of inversion volume size 査読有り

    Xuran Liang, Dapeng Zhao, Yuanyuan Hua, Yi‐Gang Xu

    Journal of Geophysical Research: Solid Earth 127 (12) e2022JB024782 2022年11月22日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022jb024782  

    ISSN:2169-9313

    eISSN:2169-9356

  77. Whole‐Mantle Tomography of Southeast Asia: New Insight Into Plumes and Slabs 査読有り

    Genti Toyokuni, Dapeng Zhao, Kenkichi Kurata

    Journal of Geophysical Research: Solid Earth 127 (11) e2022JB024298 2022年11月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022jb024298  

    ISSN:2169-9313

    eISSN:2169-9356

  78. Structural Heterogeneity of the Alaska‐Aleutian Forearc: Implications for Interplate Coupling and Seismogenic Behaviors 査読有り

    Tao Gou, Shaohong Xia, Zhouchuan Huang, Dapeng Zhao

    Journal of Geophysical Research: Solid Earth 127 (11) e2022JB024621 2022年11月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022jb024621  

    ISSN:2169-9313

    eISSN:2169-9356

  79. Structure and dynamics of the Tonga subduction zone: New insight from P-wave anisotropic tomography 査読有り

    Zhiteng Yu, Dapeng Zhao, Jiabiao Li

    Earth and Planetary Science Letters 598 117844 2022年11月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.epsl.2022.117844  

    ISSN:0012-821X

  80. Thermal and rheological structure of lithosphere beneath Northeast China 査読有り

    Dong Yan, You Tian, Dapeng Zhao, Hongli Li

    Tectonophysics 840 229560 2022年10月5日

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2022.229560  

    ISSN:0040-1951

  81. Northeastward expansion of the Tibetan Plateau: Seismic anisotropy evidence from shear-wave splitting measurements 査読有り

    Bin Cheng, Yuan Liu, Yunpeng Dong, Dapeng Zhao, Zhao Yang, Guowei Zhang

    Journal of Asian Earth Sciences 240 105430 2022年9月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2022.105430  

    ISSN:1367-9120

  82. Seismotectonics of Mongolia and Baikal Rift Zone Controlled by Lithospheric Structures 査読有り

    Zhouchuan Huang, Dapeng Zhao

    Geophysical Research Letters 49 (15) 2022年8月16日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2022gl099525  

    ISSN:0094-8276

    eISSN:1944-8007

  83. The Moho, slab and tomography of the East Japan forearc derived from seafloor S-net data 査読有り

    Dapeng Zhao, Yu Katayama, Genti Toyokuni

    Tectonophysics 837 229452 2022年8月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2022.229452  

    ISSN:0040-1951

  84. Anatomy of large earthquakes in North China 査読有り

    Hongli Li, You Tian, Dapeng Zhao, Dong Yan

    Journal of Asian Earth Sciences 237 105342 2022年7月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2022.105342  

    ISSN:1367-9120

  85. Pn Anisotropic Tomography of Hainan Island and Surrounding Areas: New Insights Into the Hainan Mantle Plume 査読有り

    Hongbin Lu, Jianshe Lei, Dapeng Zhao, Yi‐Gang Xu, Changqing Sun, Xiaohui Hu

    Journal of Geophysical Research: Solid Earth 127 (6) e2021JB023609 2022年6月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2021jb023609  

    ISSN:2169-9313

    eISSN:2169-9356

  86. Subducting slabs, Hainan plume and intraplate volcanism in SE Asia: Insight from P-wave mantle tomography 査読有り

    Zewei Wang, Dapeng Zhao, Xiaofei Chen, Rui Gao

    Tectonophysics 831 229329 2022年5月20日

    DOI: 10.1016/j.tecto.2022.229329  

    ISSN:0040-1951

  87. Complex patterns of mantle flow in eastern SE Asian subduction zones inferred from P-wave anisotropic tomography 査読有り

    Wei Wei, Dapeng Zhao, Weiqian Yu, Yaolin Shi

    Journal of Geophysical Research: Solid Earth 127 (4) 2022年4月

  88. Seismic Structure of the Caroline Plateau-Yap Trench Collision Zone 査読有り

    Jianke Fan, Hong Zheng, Dapeng Zhao, Dongdong Dong, Yongliang Bai, Cuilin Li, Zhengyi Zhang

    Geophysical Research Letters 49 (6) 2022年3月28日

    DOI: 10.1029/2022GL098017  

    ISSN:0094-8276

    eISSN:1944-8007

  89. Continental Break-Up Under a Convergent Setting: Insights From P Wave Radial Anisotropy Tomography of the Woodlark Rift in Papua New Guinea 査読有り

    Youqiang Yu, Frederik Tilmann, Dapeng Zhao, Stephen S. Gao, Kelly H. Liu

    Geophysical Research Letters 49 (5) 2022年3月16日

    DOI: 10.1029/2022GL098086  

    ISSN:0094-8276

    eISSN:1944-8007

  90. Seismogenic crustal structure affected by the Hainan mantle plume 査読有り

    Jiangnan Lin, Shaohong Xia, Xinyang Wang, Dapeng Zhao, Dawei Wang

    Gondwana Research 103 23-36 2022年3月

    DOI: 10.1016/j.gr.2021.10.029  

    ISSN:1342-937X

  91. Crustal flow and fluids affected the 2021 M7.4 Maduo earthquake in Northeast Tibet 査読有り

    Ziqiang Yang, Dapeng Zhao, Yunpeng Dong, Bin Cheng

    Journal of Asian Earth Sciences 225 105050 2022年3月

    DOI: 10.1016/j.jseaes.2021.105050  

    ISSN:1367-9120

  92. Structural control on the 2019 Ridgecrest earthquake from local seismic tomography 査読有り

    Ziqiang Yang, Dapeng Zhao, Bin Cheng, Yunpeng Dong

    Physics of the Earth and Planetary Interiors 324 106853 2022年3月

    DOI: 10.1016/j.pepi.2022.106853  

    ISSN:0031-9201

  93. Oceanic plate subduction and continental extrusion in Sumatra: Insight from S-wave anisotropic tomography 査読有り

    Xiao Wang, Xin Liu, Dapeng Zhao, Bo Liu, Qingyu Qiao, Long Zhao, Xiaotong Wang

    Earth and Planetary Science Letters 580 117388 2022年2月15日

    DOI: 10.1016/j.epsl.2022.117388  

    ISSN:0012-821X

  94. P-wave anisotropic tomography of NE China: insight into lithospheric deformation, mantle dynamics and intraplate volcanism 査読有り

    Ruo Jia, Dapeng Zhao, Jianping Wu

    Geophysical Journal International 229 (2) 1372-1391 2022年2月12日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggab516  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    SUMMARY We determine robust 3-D P-wave anisotropic tomography of the crust and upper mantle beneath NE China using high-quality traveltime data of local earthquakes and teleseismic events recorded at 334 network and portable stations. In the upper crust, nearly E-W fast-velocity directions (FVDs) of azimuthal anisotropy are revealed in the central Songliao basin, which is surrounded by circular-shaped FVDs along the basin edges. The E-W FVDs may reflect microcracks or fractures in the upper crust, which are aligned under the control of regional tectonic stress. In the lower crust, low-velocity (low-V) anomalies with NE-SW FVDs exist along the Tanlu fault zone, which may reflect NE-SW trending ductile deformation or viscous flow along the fault zone. The FVDs are mainly NNW-SSE to N-S in the uppermost mantle beneath most of the study region, which may reflect fossil deformation of the mantle lithosphere caused by the Palaeo-Pacific plate subduction. High-velocity anomalies with NE-SW FVDs are revealed at ∼100 km depth directly beneath the Great XingAn Mountain, which may reflect an old lithospheric remnant. In the deep upper mantle, the FVDs are mostly NW-SE, consistent with SKS splitting measurements, which may be closely related to the intermittently retreating stagnant Pacific slab beneath East Asia. Under the Changbai and other intraplate volcanoes in NE China, prominent low-V anomalies exist in the big mantle wedge (BMW) above the slab in the mantle transition zone, suggesting that these volcanoes are caused by hot and wet upwelling flows in the BMW closely associated with the deep subduction and dehydration of the western Pacific plate.

  95. Azimuthal Anisotropy Tomography of the Southeast Asia Subduction System 査読有り

    Yuanyuan Hua, Dapeng Zhao, Yi Gang Xu

    Journal of Geophysical Research: Solid Earth 127 (2) 2022年2月

    DOI: 10.1029/2021JB022854  

    ISSN:2169-9313

    eISSN:2169-9356

  96. Anisotropic Tomography and Dynamics of the Big Mantle Wedge 査読有り

    Xuran Liang, Dapeng Zhao, Yi-Gang Xu, Yuanyuan Hua

    Geophysical Research Letters 49 (2) 1-10 2022年2月

    DOI: 10.1029/2021GL097550  

    ISSN:0094-8276

    eISSN:1944-8007

  97. Seismic Anisotropy and Intraslab Hydrated Faults Beneath the NE Japan Forearc 査読有り

    Zewei Wang, Dapeng Zhao, Xiaofei Chen

    Geophysical Research Letters 49 (2) e2021GL097266 2022年1月28日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2021gl097266  

    ISSN:0094-8276

    eISSN:1944-8007

  98. Mantle structure and flow beneath the central-western US: Constraints from anisotropic tomography 査読有り

    Xinyang Wang, Dapeng Zhao, Shaohong Xia, Jiabiao Li

    Tectonophysics 822 229180 2022年1月5日

    DOI: 10.1016/j.tecto.2021.229180  

    ISSN:0040-1951

  99. Pn Anisotropic Tomography of Northeast Asia: New Insight Into Subduction Dynamics and Volcanism 査読有り

    Mofei Du, Jianshe Lei, Dapeng Zhao, Hongbin Lu

    Journal of Geophysical Research: Solid Earth 127 (1) 2022年1月

    DOI: 10.1029/2021JB023080  

    ISSN:2169-9313

    eISSN:2169-9356

  100. P-Wave Tomography for 3-D Radial and Azimuthal Anisotropy Beneath Greenland and Surrounding Regions 査読有り

    Genti Toyokuni, Dapeng Zhao

    Earth and Space Science 8 (12) 2021年12月

    DOI: 10.1029/2021EA001800  

    eISSN:2333-5084

  101. Upper Mantle Structure Beneath Mariana: Insights From Rayleigh-Wave Anisotropic Tomography 査読有り

    Qingyu Qiao, Xin Liu, Dapeng Zhao, Sanzhong Li, Shujuan Zhao, Long Zhao, Xiao Wang

    Geochemistry, Geophysics, Geosystems 22 (11) 2021年11月

    DOI: 10.1029/2021GC009902  

    eISSN:1525-2027

  102. Mapping the Pacific Slab Edge and Toroidal Mantle Flow Beneath Kamchatka 査読有り

    Long Zhao, Xin Liu, Dapeng Zhao, Xiao Wang, Qingyu Qiao

    Journal of Geophysical Research: Solid Earth 126 (11) 2021年11月

    DOI: 10.1029/2021JB022518  

    ISSN:2169-9313

    eISSN:2169-9356

  103. Anisotropic tomography of the Cascadia subduction zone 査読有り

    Dapeng Zhao, Yuanyuan Hua

    Physics of the Earth and Planetary Interiors 318 106767 2021年7月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2021.106767  

    ISSN:0031-9201

  104. Seismic Reflection Images of Possible Mantle-Fluid Conduits and Basal Erosion in the 2011 Tohoku Earthquake Rupture Area 査読有り

    J. Park, T. Tsuru, G. Fujie, E. Hondori, T. Kagoshima, N. Takahata, D. Zhao, Y. Sano

    Frontiers in Earth Science 9 687382 2021年7月

    DOI: 10.3389/feart.2021.687382  

    eISSN:2296-6463

  105. Conditions of magma generation at the Me-akan volcano, northern Japan 査読有り

    Takeshi Kuritani, Eiichi Sato, Keiji Wada, Akiko Matsumoto, Mitsuhiro Nakagawa, Dapeng Zhao, Kenji Shimizu, Takayuki Ushikubo

    Journal of Volcanology and Geothermal Research 417 107323 2021年6月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jvolgeores.2021.107323  

    ISSN:0377-0273

  106. Mantle Flow and Dynamics Beneath Central‐East China: New Insights From P‐Wave Anisotropic Tomography 査読有り

    Guoming Jiang, Guibin Zhang, Dapeng Zhao, Qingtian Lü, Danian Shi, Hongyi Li, Xinfu Li

    Journal of Geophysical Research: Solid Earth 126 (5) 2021年5月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2020jb020070  

    ISSN:2169-9313

    eISSN:2169-9356

  107. Subslab heterogeneity and giant megathrust earthquakes 査読有り

    Jianke Fan, Dapeng Zhao

    Nature Geoscience 14 (5) 349-353 2021年5月

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s41561-021-00728-x  

    ISSN:1752-0894

    eISSN:1752-0908

  108. Structural control on the 2018 and 2019 Hualien earthquakes in Taiwan 査読有り

    Genti Toyokuni, Dapeng Zhao, Kate Huihsuan Chen

    Physics of the Earth and Planetary Interiors 312 106673 2021年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2021.106673  

    ISSN:0031-9201

  109. Seismic structure and subduction dynamics of the western Japan arc 査読有り

    Dapeng Zhao, Jian Wang, Zhouchuan Huang, Xin Liu

    Tectonophysics 802 228743 2021年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.tecto.2021.228743  

    ISSN:0040-1951

  110. Seismic imaging of Northwest Pacific and East Asia: New insight into volcanism, seismogenesis and geodynamics 招待有り 査読有り

    Dapeng Zhao

    Earth-Science Reviews 214 103507 2021年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.earscirev.2021.103507  

    ISSN:0012-8252

  111. Seismic evidence for a plume-modified oceanic lithosphere–asthenosphere system beneath Cape Verde 査読有り

    Xin Liu, Dapeng Zhao

    Geophysical Journal International 225 (2) 872-886 2021年2月15日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggab012  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    <title>SUMMARY</title> We determine a new 3-D shear wave velocity (Vs) model down to 400 km depth beneath the Cape Verde hotspot that is far from plate boundaries. This Vs model is obtained by using a new method of jointly inverting P- and S-wave receiver functions, Rayleigh-wave phase-velocity data and S-wave arrival times of teleseismic events. Two Vs discontinuities at ∼15 and ∼60 km depths are revealed beneath volcanic islands, which are interpreted as the Moho discontinuity and the Gutenberg (G) discontinuity. Between the north and south islands, obvious high-Vs anomalies exist in the uppermost mantle down to a depth of ∼100–150 km beneath the Atlantic Ocean, whereas obvious low-Vs anomalies exist in the uppermost mantle beneath the volcanic islands including the active Fogo volcano. These low-Vs anomalies merge into a significant column-like low-Vs zone at depths of ∼150–400 km beneath the Cape Verde swell. We propose that these features in the upper mantle reflect a plume-modified oceanic lithosphere–asthenosphere system beneath the Cape Verde hotspot.

  112. Deep mantle structure and origin of Cenozoic intraplate volcanoes in Indochina, Hainan and South China Sea 査読有り

    Dapeng Zhao, Genti Toyokuni, Kenkichi Kurata

    Geophysical Journal International 225 (1) 572-588 2021年2月14日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggaa605  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    <title>SUMMARY</title> Cenozoic basalts with ages ranging from 28.5 to &amp;lt; 0.1 Ma are widely distributed in the Indochina block, the South China Sea basin and the Leiqiong area in South China including the Leizhou Peninsula and the northern Hainan Island, which form the southeastern Asian basalt province (SABP). These Cenozoic basalts share common petrological and geochemical characteristics. However, the origin of the Cenozoic intraplate volcanism in the SABP is still a controversial issue. In this work, we apply a novel technique of multiscale global tomography to study the whole-mantle 3-D P-wave velocity (Vp) structure beneath the SABP. Our results show that low-Vp anomalies prevail in the whole mantle beneath the SABP. Although the strongest low-Vp zones exist beneath Hainan, significant low-Vp anomalies are also visible in the mantle beneath other parts of the SABP. These low-Vp anomalies appear somehow independent, rather than deriving from a single plume. We deem that a cluster of plumes rather than a single plume existed in the Cenozoic and may still exist now in the mantle beneath the SABP, though the Hainan plume may be the strongest one. A geochemical study suggested that the Hainan plume upwelling might be slowing down and close to exhausting its source zone. This geochemical inference is supported by our tomographic images showing that the low-Vp zones under Hainan are weak and intermittent in the lower mantle (∼700–2889 km depths). The low-Vp zones in the mantle beneath other SABP Cenozoic volcanoes are also weak, suggesting that those mantle plumes, if any, are also dying or already dead. As compared with a strong single plume, each member in a plume cluster should be small and weak, and so hard to exist long. The SABP is surrounded by subduction zones. The hot mantle upwelling beneath the SABP might be caused by collapsing of subducted slabs down to the lowermost mantle.

  113. Upper Mantle Heterogeneity and Radial Anisotropy Beneath the Western Tibetan Plateau 査読有り

    Heng Zhang, Dapeng Zhao, Junmeng Zhao, Yunyue Elita Li, Hongbing Liu, Min Ding, Yong Jiang, Xin Xu

    Tectonics 40 (2) 2021年2月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2020tc006403  

    ISSN:0278-7407

    eISSN:1944-9194

  114. Cracks and fluids in the Northeast Tibetan crust: New insight into seismotectonics 査読有り

    Anhui Sun, Dapeng Zhao, Huili Guo

    Physics of the Earth and Planetary Interiors 311 106634 2021年2月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2020.106634  

    ISSN:0031-9201

  115. P‐wave Tomography and Azimuthal Anisotropy of the Manila‐Taiwan‐Southern Ryukyu Region 査読有り

    Jianke Fan, Dapeng Zhao

    Tectonics 40 (2) 2021年2月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2020tc006262  

    ISSN:0278-7407

    eISSN:1944-9194

  116. Deep structure beneath the southwestern flank of the Baikal rift zone and adjacent areas 査読有り

    Hanting Wu, Zhouchuan Huang, Dapeng Zhao

    Physics of the Earth and Planetary Interiors 310 106616 2021年1月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2020.106616  

    ISSN:0031-9201

  117. 3D anisotropic structure of the Japan subduction zone 査読有り

    Zewei Wang, Dapeng Zhao

    Science Advances 7 (4) eabc9620 2021年1月

    出版者・発行元: American Association for the Advancement of Science (AAAS)

    DOI: 10.1126/sciadv.abc9620  

    eISSN:2375-2548

    詳細を見る 詳細を閉じる

    How mantle materials flow and how intraslab fabrics align in subduction zones are two essential issues for clarifying material recycling between Earth’s interior and surface. Investigating seismic anisotropy is one of a few viable technologies that can directly answer these questions. However, the detailed anisotropic structure of subduction zones is still unclear. Under a general hexagonal symmetry anisotropy assumption, we develop a tomographic method to determine a high-resolution three-dimensional (3D) <italic>P</italic> wave anisotropic model of the Japan subduction zone by inverting 1,184,018 travel time data of local and teleseismic events. As a result, the 3D anisotropic structure in and around the dipping Pacific slab is firstly revealed. Our results show that slab deformation plays an important role in both mantle flow and intraslab fabric, and the widely observed trench-parallel anisotropy in the forearc is related to the intraslab deformation during the outer-rise yielding of the subducting plate.

  118. Groundwater Anomaly Related to CCS-CO2 Injection and the 2018 Hokkaido Eastern Iburi Earthquake in Japan 査読有り

    Yuji Sano, Takanori Kagoshima, Naoto Takahata, Kotaro Shirai, Jin-Oh Park, Glen T. Snyder, Tomo Shibata, Junji Yamamoto, Yoshiro Nishio, Ai-Ti Chen, Sheng Xu, Dapeng Zhao, Daniele L. Pinti

    Frontiers in Earth Science 8 2020年12月10日

    DOI: 10.3389/feart.2020.611010  

    eISSN:2296-6463

  119. Isotropic and Anisotropic P Wave Velocity Structures of the Crust and Uppermost Mantle Beneath Turkey 査読有り

    Haibo Wang, Zhouchuan Huang, Tuna Eken, Derya Keleş, Tulay Kaya‐Eken, Judith M. Confal, Ceyhun Erman, Seda Yolsal‐Çevikbilen, Dapeng Zhao, Tuncay Taymaz

    Journal of Geophysical Research: Solid Earth 125 (12) 2020年12月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2020jb019566  

    ISSN:2169-9313

    eISSN:2169-9356

  120. P Wave Tomography Beneath Greenland and Surrounding Regions: 2. Lower Mantle 査読有り

    Genti Toyokuni, Takaya Matsuno, Dapeng Zhao

    Journal of Geophysical Research: Solid Earth 125 (12) 2020年12月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2020jb019839  

    ISSN:2169-9313

    eISSN:2169-9356

  121. P Wave Tomography Beneath Greenland and Surrounding Regions: 1. Crust and Upper Mantle 査読有り

    Genti Toyokuni, Takaya Matsuno, Dapeng Zhao

    Journal of Geophysical Research: Solid Earth 125 (12) 2020年12月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2020jb019837  

    ISSN:2169-9313

    eISSN:2169-9356

  122. Tomography of the source zone of the great 2011 Tohoku earthquake 査読有り

    Yuanyuan Hua, Dapeng Zhao, Genti Toyokuni, Yixian Xu

    Nature Communications 11 (1) 2020年12月

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s41467-020-14745-8  

    eISSN:2041-1723

    詳細を見る 詳細を閉じる

    <title>Abstract</title>The mechanism and rupture process of the giant 2011 Tohoku-oki earthquake (Mw 9.0) are still poorly understood due to lack of permanent near-field observations. Using seismic arrival times recorded by dense seismograph networks on land and at ocean floor, we determine a detailed seismic tomography model of the megathrust zone beneath the Tohoku forearc. Our results show that the coseismic slip of the 2011 Tohoku-oki earthquake initiated at a boundary between a down-dip high-velocity anomaly and an up-dip low-velocity anomaly. The slow anomaly at shallow depths near the Japan trench may reflect low-rigidity materials that are close to the free surface, resulting in large slip and weak high-frequency radiation. Our new tomographic model can account for not only large slip near the trench but also weak high-frequency radiation from the shallow rupture areas.

  123. Anisotropic Tomography Beneath Northeast Tibet: Evidence for Regional Crustal Flow 査読有り

    Anhui Sun, Dapeng Zhao

    Tectonics 39 (7) 2020年7月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2020tc006161  

    ISSN:0278-7407

    eISSN:1944-9194

  124. Upper Mantle Deformation of the Terror Rift and Northern Transantarctic Mountains in Antarctica: Insight From P Wave Anisotropic Tomography 査読有り

    Heng Zhang, Dapeng Zhao, Changhui Ju, Yunyue Elita Li, Guohui Li, Min Ding, Shuze Chen, Junmeng Zhao

    Geophysical Research Letters 47 (9) 2020年5月16日

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019gl086511  

    ISSN:0094-8276

    eISSN:1944-8007

  125. A new method to estimate ocean-bottom-seismometer orientation using teleseismic receiver functions 査読有り

    Hong Zheng, Jianke Fan, Dapeng Zhao, Cuilin Li, Dongdong Dong, Guangxu Zhang, Xiujuan Wang

    Geophysical Journal International 221 (2) 893-904 2020年5月1日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggaa041  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    <title>SUMMARY</title> The orientation of an ocean-bottom-seismometer (OBS) is a critical parameter for analysing three-component seismograms, but it is difficult to estimate because of the uncontrollable OBS posture after its deployment. In this study, we develop a new and effective method to estimate the OBS orientation by fitting the amplitude of direct P wave of teleseismic receiver functions. The reliability of this method is verified using synthetic data and observed waveforms recorded at land seismic stations in Shandong Province, China. Our extensive synthetic tests show that our new method is little affected by a thin sedimentary layer that has a low S-wave velocity. The orientations of OBS stations that we deployed in the Yap subduction zone in the Western Pacific Ocean are estimated and corrected using our new method. After the correction, the direct P waves of teleseismic receiver functions show very good consistency. The effects of white and coloured noise in different levels, epicentral distance and backazimuth are also investigated, and the results show that these factors have small effects on the new method. We also examine the effect of sensor tilting on estimation of the OBS orientation, and find that a tilting correction should be made before the misorientation correction. We compare the OBS orientations determined with the new method and other methods and find that they are generally consistent with each other. We also discuss advantages and shortcomings of various methods, and think that our new method is more robust than the existing methods.

  126. Seismogenic structure in the source zone of the 1918 M7.5 NanAo earthquake in the northern South China Sea 査読有り

    Shaohong Xia, Pengxiang Zhou, Dapeng Zhao, Jinghe Cao

    Physics of the Earth and Planetary Interiors 302 106472 2020年5月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2020.106472  

    ISSN:0031-9201

  127. Seismic Evidence for Water Transportation in the Forearc off Northern Japan 査読有り

    Zhiteng Yu, Dapeng Zhao

    Journal of Geophysical Research: Solid Earth 125 (4) 2020年4月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019jb018600  

    ISSN:2169-9313

    eISSN:2169-9356

  128. SKS Splitting Measurements in NE China: New Insights Into the Wudalianchi Intraplate Volcanism and Mantle Dynamics 査読有り

    Mingwen Lu, Jianshe Lei, Dapeng Zhao, Yinshuang Ai, Xiwei Xu, Guibin Zhang

    Journal of Geophysical Research: Solid Earth 125 (3) 2020年3月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019jb018575  

    ISSN:2169-9313

    eISSN:2169-9356

  129. Structural Heterogeneity in Source Zones of the 2018 Anchorage Intraslab Earthquake and the 1964 Alaska Megathrust Earthquake 査読有り

    Tao Gou, Dapeng Zhao, Zhouchuan Huang, Liangshu Wang

    Geochemistry, Geophysics, Geosystems 21 (3) 2020年3月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019gc008812  

    ISSN:1525-2027

    eISSN:1525-2027

  130. Foundered lithospheric segments dropped into the mantle transition zone beneath southern California, USA 査読有り

    Youqiang Yu, Stephen S. Gao, Kelly H. Liu, Dapeng Zhao

    Geology 48 (2) 200-204 2020年2月1日

    出版者・発行元: Geological Society of America

    DOI: 10.1130/g46889.1  

    ISSN:0091-7613

    eISSN:1943-2682

    詳細を見る 詳細を閉じる

    <title>Abstract</title>The diverse range of active tectonics occurring in southern California, USA, offers an opportunity to explore processes of continental deformation and modification in response to the instability of the Pacific and Farallon plates. Here, we present a high-resolution receiver-function image of the mantle transition zone (MTZ). Our result reveals significant lateral heterogeneities in the deep mantle beneath southern California. Both seismic tomography and MTZ discontinuity deflections reveal foundered lithospheric segments that have dropped into the MTZ beneath the western Transverse Ranges, the Peninsular Ranges, and part of the southern Sierra Nevada. Water dehydrated from these foundered materials may contribute to the observed MTZ thickening. Our observations, combined with previous tomography and geochemical results, indicate that lithospheric foundering of fossil arc roots provides a way for geochemical heterogeneities to be recycled into the underlying mantle, and suggest that the foundered materials can play a significant role in inducing lateral variations of MTZ structure.

  131. Upper mantle tomography of the Western Junggar: Implications for its geodynamic evolution 査読有り

    Yuanyuan Hua, Yixian Xu, Dapeng Zhao, Rong Huang, Xiaohuan Jiang

    Physics of the Earth and Planetary Interiors 299 106405 2020年2月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2019.106405  

    ISSN:0031-9201

  132. Mantle Structure and Flow Beneath an Early‐Stage Continental Rift: Constraints From P Wave Anisotropic Tomography 査読有り

    Youqiang Yu, Stephen S. Gao, Dapeng Zhao, Kelly H. Liu

    Tectonics 39 (2) 2020年2月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019tc005590  

    ISSN:0278-7407

    eISSN:1944-9194

  133. P-wave upper-mantle tomography of the Tanlu fault zone in eastern China 査読有り

    Jianshe Lei, Dapeng Zhao, Xiwei Xu, Mofei Du, Qi Mi, Mingwen Lu

    Physics of the Earth and Planetary Interiors 299 106402 2020年2月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2019.106402  

    ISSN:0031-9201

  134. Intraplate volcanism and mantle dynamics of Mainland China: New constraints from shear-wave tomography 査読有り

    Wei Wei, Dapeng Zhao

    Journal of Asian Earth Sciences 188 104103 2020年2月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.jseaes.2019.104103  

    ISSN:1367-9120

  135. Structural heterogeneity and megathrust earthquakes in Southwest Japan 査読有り

    Xiongwei Niu, Dapeng Zhao, Yukio Isozaki, Yukihisa Nishizono, Hirohito Inakura

    Physics of the Earth and Planetary Interiors 298 106347-106347 2020年

    出版者・発行元:

    DOI: 10.1016/j.pepi.2019.106347  

    ISSN:0031-9201

  136. Arc-arc collision caused the 2018 Eastern Iburi earthquake (M 6.7) in Hokkaido, Japan 査読有り

    Yuanyuan Hua, Dapeng Zhao, Yixian Xu, Zewei Wang

    Scientific Reports 9 (1) 2019年12月

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s41598-019-50305-x  

    eISSN:2045-2322

    詳細を見る 詳細を閉じる

    <title>Abstract</title> Inland crustal earthquakes usually occur in the brittle upper crust (0–20 km depths), but the 6 September 2018 Eastern Iburi earthquake (M 6.7) took place in southern Hokkaido with a focal depth of ~37 km, causing 41 fatalities and serious damage to the local infrastructure. The reason why this event was so deep and its causal mechanism are still unclear. In this work we study the three-dimensional P and S wave seismic attenuation (1/Q) structure in the source zone of the 2018 Iburi earthquake. Our results show that this event occurred at the boundary between the Sorachi-Yezo belt (low Q) and the dipping Northeastern (NE) Japan arc (high Q) that is descending beneath the Kuril arc. The collision between the NE Japan and Kuril arcs as well as fluids from dehydration of the subducting Pacific plate caused this big event and its unusual focal depth. Similar attenuation structures are revealed in source zones of the 1970 Hidaka earthquake (M 6.7) and the 1982 Urakawa-oki earthquake (M 7.1), suggesting that they were caused by similar processes. We think that large earthquakes will take place again on the active thrust faults in southern Hokkaido in the coming decades. Hence, we should pay much attention to the seismic risk and prepare for reduction of earthquake hazards there.

  137. Updated attenuation tomography of Japan subduction zone 査読有り

    Zewei Wang, Dapeng Zhao

    Geophysical Journal International 219 (3) 1679-1697 2019年12月1日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggz339  

    ISSN:0956-540X

    eISSN:1365-246X

    詳細を見る 詳細を閉じる

    <title>SUMMARY</title> We determine an updated model of P- and S-wave attenuation (Qp, Qs) tomography of the Japan subduction zone using an improved inversion scheme, and derive the first Qp/Qs model of the study region. We establish a system of observation t* equations by taking 1/Q values at 3-D grid nodes arranged in the study volume as unknown parameters. This scheme can eliminate model errors caused by ignoring high-order terms of the Taylor expansion in the Q-format scheme adopted by previous studies. The inversion problem is considered as a quadratic programming problem with bound constraints for best fitting the observed t* data in a least-squares sense. The 3-D attenuation model is obtained by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because this inversion scheme uses bound constraints to avoid negative Q values, damping regularization is not needed, hence the ranges of Qp and Qs values obtained are less affected by human subjectivity. The subducting Pacific and Philippine Sea slabs exhibit high-Q and high Qp/Qs, whereas the mantle wedge beneath the volcanic front and back-arc area shows low-Q and low Qp/Qs. Both Qp and Qs vary in a range of 10–2000, and the Qp/Qs ratio changes from 0.4 to 1.4. Our results reveal a narrow high-Qp/Qs belt that is coincident with the distribution of volcanic and non-volcanic low-frequency micro-earthquakes (M 0.0–2.5), which may reflect high water-saturation anomalies that are probably associated with slab-derived fluids and responsible for the generation of low-frequency micro-earthquakes.

  138. Buoyant hydrous mantle plume from the mantle transition zone 査読有り

    Takeshi Kuritani, Qun Ke Xia, Jun Ichi Kimura, Jia Liu, Kenji Shimizu, Takayuki Ushikubo, Dapeng Zhao, Mitsuhiro Nakagawa, Shumpei Yoshimura

    Scientific Reports 9 (1) 2019年12月1日

    DOI: 10.1038/s41598-019-43103-y  

    eISSN:2045-2322

  139. Importance of later phases in seismic tomography 査読有り

    Dapeng Zhao

    Physics of the Earth and Planetary Interiors 296 106314 2019年11月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2019.106314  

    ISSN:0031-9201

  140. P and S Wave Tomography Beneath the SE Tibetan Plateau: Evidence for Lithospheric Delamination 査読有り

    Zhouchuan Huang, Liangshu Wang, Mingjie Xu, Dapeng Zhao, Ning Mi, Dayong Yu

    Journal of Geophysical Research: Solid Earth 124 (10) 10292-10308 2019年10月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019jb017430  

    ISSN:2169-9313

    eISSN:2169-9356

  141. Mantle Dynamics of the Eastern Mediterranean and Middle East: Constraints From P‐Wave Anisotropic Tomography 査読有り

    Wei Wei, Dapeng Zhao, Feixiang Wei, Xiang Bai, Jiandong Xu

    Geochemistry, Geophysics, Geosystems 20 (10) 4505-4530 2019年10月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019gc008512  

    ISSN:1525-2027

    eISSN:1525-2027

  142. Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone 査読有り

    Zewei Wang, Dapeng Zhao

    Physics of the Earth and Planetary Interiors 295 106296 2019年10月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2019.106296  

    ISSN:0031-9201

  143. Upper mantle temperature structure of the North China Craton 査読有り

    Dong Yan, You Tian, Dapeng Zhao, Cai Liu, Hongxiang Zhu, Honghao Li

    Physics of the Earth and Planetary Interiors 293 106269 2019年8月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2019.106269  

    ISSN:0031-9201

  144. Tomography, Seismotectonics, and Mantle Dynamics of Central and Eastern United States 査読有り

    Haibo Wang, Dapeng Zhao, Zhouchuan Huang, Liangshu Wang

    Journal of Geophysical Research: Solid Earth 124 (8) 8890-8907 2019年8月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019jb017478  

    ISSN:2169-9313

    eISSN:2169-9356

  145. Seismic Anisotropy Evidence for Ductile Deformation of the Forearc Lithospheric Mantle in Subduction Zones 査読有り

    Jian Wang, Xiaoge Huang, Dapeng Zhao, Zhenxing Yao

    Journal of Geophysical Research: Solid Earth 124 (7) 7013-7027 2019年7月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2018jb016912  

    ISSN:2169-9313

    eISSN:2169-9356

  146. Deep Learning for Picking Seismic Arrival Times 査読有り

    Jian Wang, Zhuowei Xiao, Chang Liu, Dapeng Zhao, Zhenxing Yao

    Journal of Geophysical Research: Solid Earth 124 (7) 6612-6624 2019年7月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019jb017536  

    ISSN:2169-9313

    eISSN:2169-9356

  147. Mantle Dynamics of Western Pacific and East Asia: New Insights from P Wave Anisotropic Tomography 査読有り

    Jincheng Ma, You Tian, Dapeng Zhao, Cai Liu, Tingting Liu

    Geochemistry, Geophysics, Geosystems 20 (7) 3628-3658 2019年7月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019gc008373  

    ISSN:1525-2027

    eISSN:1525-2027

  148. Structural Heterogeneity and Anisotropy in the Source Zone of the 2018 Eastern Iburi Earthquake in Hokkaido, Japan 査読有り

    Tao Gou, Zhouchuan Huang, Dapeng Zhao, Liangshu Wang

    Journal of Geophysical Research: Solid Earth 124 (7) 7052-7066 2019年7月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2019jb017388  

    ISSN:2169-9313

    eISSN:2169-9356

  149. Is there a big mantle wedge under eastern Tibet? 査読有り

    Jianshe Lei, Dapeng Zhao, Xiwei Xu, Yi-Gang Xu, Mofei Du

    Physics of the Earth and Planetary Interiors 292 100-113 2019年7月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2019.04.005  

    ISSN:0031-9201

  150. Complex subduction beneath the Tibetan plateau: A slab warping model 査読有り

    Zewei Wang, Dapeng Zhao, Rui Gao, Yuanyuan Hua

    Physics of the Earth and Planetary Interiors 292 42-54 2019年7月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2019.04.007  

    ISSN:0031-9201

  151. Seismic Structure of the Changbai Intraplate Volcano in NE China From Joint Inversion of Ambient Noise and Receiver Functions 査読有り

    Hongxiang Zhu, You Tian, Dapeng Zhao, Honghao Li, Cai Liu

    Journal of Geophysical Research: Solid Earth 124 (5) 4984-5002 2019年5月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2018jb016600  

    ISSN:2169-9313

    eISSN:2169-9356

  152. Stress Field in the 2016 Kumamoto Earthquake (M 7.3) Area 査読有り

    Zhiteng Yu, Dapeng Zhao, Jiabiao Li, Zhouchuan Huang, Yukihisa Nishizono, Hirohito Inakura

    Journal of Geophysical Research: Solid Earth 124 (3) 2638-2652 2019年3月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2018jb017079  

    ISSN:2169-9313

    eISSN:2169-9356

  153. Aseismic Deep Slab and Mantle Flow Beneath Alaska: Insight From Anisotropic Tomography 査読有り

    Tao Gou, Dapeng Zhao, Zhouchuan Huang, Liangshu Wang

    Journal of Geophysical Research: Solid Earth 124 (2) 1700-1724 2019年2月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2018jb016639  

    ISSN:2169-9313

    eISSN:2169-9356

  154. Crustal seismic imaging of Northeast Tibet using first and later phases of earthquakes and explosions 査読有り

    Anhui Sun, Dapeng Zhao, Yuan Gao, Qinjian Tian, Ning Liu

    Geophysical Journal International 217 405-421 2019年1月16日

    出版者・発行元: Oxford University Press (OUP)

    DOI: 10.1093/gji/ggz031  

    ISSN:0956-540X

    eISSN:1365-246X

  155. P Wave Azimuthal Anisotropic Tomography in Northern Chile: Insight Into Deformation in the Subduction Zone 査読有り

    Zhouchuan Huang, Frederik Tilmann, Diana Comte, Dapeng Zhao

    Journal of Geophysical Research: Solid Earth 124 (1) 742-765 2019年1月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2018jb016389  

    ISSN:2169-9313

    eISSN:2169-9356

  156. Seismic Evidence for a Mantle Transition Zone Origin of the Wudalianchi and Halaha Volcanoes in Northeast China 査読有り

    Wei Wei, James O. S. Hammond, Dapeng Zhao, Jiandong Xu, Qian Liu, Yaning Gu

    Geochemistry, Geophysics, Geosystems 20 (1) 398-416 2019年1月

    出版者・発行元: American Geophysical Union (AGU)

    DOI: 10.1029/2018gc007663  

    ISSN:1525-2027

    eISSN:1525-2027

  157. P-wave anisotropic tomography of the central and southern Philippines 査読有り

    Jianke Fan, Dapeng Zhao

    Physics of the Earth and Planetary Interiors 286 154-164 2019年1月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.pepi.2018.12.001  

    ISSN:0031-9201

  158. 月の地震波トモグラフィーと初期地球 査読有り

    ZHAO Dapeng, 丸山茂徳, 磯崎行雄

    地学雑誌 127 (5) 619‐629(J‐STAGE) 2018年10月

    DOI: 10.5026/jgeography.127.619  

    ISSN:0022-135X

  159. Tomography of the 2016 Kumamoto earthquake area and the Beppu-Shimabara graben 査読有り

    Dapeng Zhao, Kei Yamashita, Genti Toyokuni

    Scientific Reports 8 15488 2018年10月

  160. Deep structure of the Longmenshan fault zone and mechanism of the 2008 Wenchuan earthquake 査読有り

    Lei, J, D. Zhao, X. Xu, M. Du

    Chinese Science Bulletin 63 1906-1916 2018年7月

  161. Is there a gap in the stagnant Pacific slab in the mantle transition zone under the Changbaishan volcano? 査読有り

    Lei, J, D. Zhao, Y. Xu, Q. Fan

    Acta Petrologica Sinica 34 13-22 2018年7月

  162. Cenozoic lithospheric deformation in Northeast Asia and the rapidly-aging Pacific Plate 査読有り

    Ting Yang, Louis Moresi, Dapeng Zhao, Dan Sandiford, Joanne Whittaker

    Earth and Planetary Science Letters 492 1-11 2018年6月15日

    出版者・発行元: Elsevier B.V.

    DOI: 10.1016/j.epsl.2018.03.057  

    ISSN:0012-821X

  163. Upper and lower plate controls on the great 2011 Tohoku-oki earthquake 査読有り

    Xin Liu, Dapeng Zhao

    Science Advances 4 eaat4396 2018年6月

  164. Time-lapse seismic tomography of an underground mining zone 査読有り

    Zewei Wang, Xibing Li, Dapeng Zhao, Xueyi Shang, Longjun Dong

    International Journal of Rock Mechanics and Mining Sciences 107 136-149 2018年5月

  165. Anisotropic 3-D Ray Tracing and Its Application to Japan Subduction Zone 査読有り

    Tao Gou, Dapeng Zhao, Zhouchuan Huang, Liangshu Wang

    Journal of Geophysical Research: Solid Earth 123 (5) 4088-4108 2018年5月1日

    出版者・発行元: Blackwell Publishing Ltd

    DOI: 10.1029/2017JB015321  

    ISSN:2169-9356 2169-9313

  166. Crustal tomography of the 2016 Kumamoto earthquake area in West Japan using P and PmP data 査読有り

    Haibo Wang, Dapeng Zhao, Zhouchuan Huang, Mingjie Xu, Liangshu Wang, Y. Nishizono, H. Inakura

    Geophysical Journal International 214 1151-1163 2018年4月

  167. Age of the Subducting Philippine Sea Slab and Mechanism of Low-Frequency Earthquakes 査読有り

    Yuanyuan Hua, Dapeng Zhao, Yixian Xu, Xin Liu

    Geophysical Research Letters 45 (5) 2303-2310 2018年3月16日

    出版者・発行元: Blackwell Publishing Ltd

    DOI: 10.1002/2017GL076531  

    ISSN:1944-8007 0094-8276

  168. Seismic velocity structure, VP/VS ratio and anisotropy beneath Northeast Japan: implications for water migration in subduction zones

    Jian Wang, Zhuowei Xiao, Dapeng Zhao, Zhenxing Yao

    Acta Geophysica Sinica 61 (3) 832-844 2018年3月1日

    出版者・発行元: Science Press

    DOI: 10.6038/cjg2018L0621  

    ISSN:0001-5733

  169. Tottori earthquakes and Daisen volcano: Effects of fluids, slab melting and hot mantle upwelling 査読有り

    Dapeng Zhao, Xin Liu, Yuanyuan Hua

    Earth and Planetary Science Letters 485 121-129 2018年3月1日

    出版者・発行元: Elsevier B.V.

    DOI: 10.1016/j.epsl.2017.12.040  

    ISSN:0012-821X

  170. Precise relocation of low-frequency earthquakes in Northeast Japan: New insight into arc magma and fluids 査読有り

    Xiongwei Niu, Dapeng Zhao, Jiabiao Li

    Geophysical Journal International 212 (2) 1183-1200 2018年2月1日

    出版者・発行元: Oxford University Press

    DOI: 10.1093/gji/ggx445  

    ISSN:1365-246X 0956-540X

  171. Changes in Greenland ice bed conditions inferred from seismology 査読有り

    Toyokuni G, Takenaka H, Takagi R, Kanao M, Tsuboi S, Tono Y, Childs D, Zhao D

    Physics of the Earth and Planetary Interiors 277 81-98 2018年

    DOI: 10.1016/j.pepi.2017.10.010  

  172. Crustal plumbing system of post-rift magmatism in the northern margin of South China Sea: New insights from integrated seismology 査読有り

    Xia, S, F. Zhao, D. Zhao, C. Fan

    Tectonophysics 744 227-238 2018年

  173. P-wave tomography of Northeast Asia: Constraints on the western Pacific plate subduction and mantle dynamics 査読有り

    Jincheng Ma, You Tian, Cai Liu, Dapeng Zhao, Xuan Feng, Hongxiang Zhu

    Physics of the Earth and Planetary Interiors 274 105-126 2018年1月1日

    出版者・発行元: Elsevier B.V.

    DOI: 10.1016/j.pepi.2017.11.003  

    ISSN:0031-9201

  174. Spatiotemporal distribution of low-frequency earthquakes in Southwest Japan: Evidence for fluid migration and magmatic activity 査読有り

    Zhiteng Yu, Dapeng Zhao, Xiongwei Niu, Jiabiao Li

    Journal of Asian Earth Sciences 151 148-172 2018年1月1日

    出版者・発行元: Elsevier Ltd

    DOI: 10.1016/j.jseaes.2017.10.033  

    ISSN:1367-9120

  175. Evolution of the southern segment of the Philippine Trench: Constraints from seismic tomography 査読有り

    Fan, J, D. Zhao

    Geochem. Geophys. Geosyst. 2018年

  176. P-wave anisotropic tomography of the SE Tibetan Plateau: Evidence for the crustal and upper-mantle deformations 査読有り

    Huang, Z, L. Wang, M. Xu, D. Zhao

    J. Geophys. Res. 2018年

  177. Lithospheric deformation and asthenospheric flow associated with the Isabella anomaly in Southern California 査読有り

    Yu, Y, D. Zhao

    J. Geophys. Res. 2018年

  178. Formation of rifts in central Tibet: Insight from P-wave radial anisotropy 査読有り

    Zhang, H, Y. Li, D. Zhao, J. Zhao, H. Liu

    J. Geophys. Res. 2018年

  179. Eclogitization of the subducted oceanic crust and its implications for the mechanism of slow earthquakes 査読有り

    Wang, X, D. Zhao, H. Suzuki, J. Li, A. Ruan

    Geophys. Res. Lett. 44 12125-12132 2017年11月

  180. Internal Deformation of Lithosphere Beneath Central Tibet 査読有り

    Heng Zhang, Dapeng Zhao, Junmeng Zhao, Zhaoguo Hu

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 122 (9) 7329-7342 2017年9月

    DOI: 10.1002/2017JB014184  

    ISSN:2169-9313

    eISSN:2169-9356

  181. Depth-varying azimuthal anisotropy in the Tohoku subduction channel 査読有り

    Xin Liu, Dapeng Zhao

    EARTH AND PLANETARY SCIENCE LETTERS 473 33-43 2017年9月

    DOI: 10.1016/j.epsl.2017.05.034  

    ISSN:0012-821X

    eISSN:1385-013X

  182. Big mantle wedge, anisotropy, slabs and earthquakes beneath the Japan Sea 査読有り

    Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 270 9-28 2017年9月

    DOI: 10.1016/j.pepi.2017.06.009  

    ISSN:0031-9201

    eISSN:1872-7395

  183. Seismic imaging of the Asian orogens and subduction zones 招待有り 査読有り

    Dapeng Zhao, Yukio Isozaki, Shigenori Maruyama

    JOURNAL OF ASIAN EARTH SCIENCES 145 349-367 2017年9月

    DOI: 10.1016/j.jseaes.2017.06.016  

    ISSN:1367-9120

    eISSN:1878-5786

  184. P-wave tomography of subduction zones around the central Philippines and its geodynamic implications 査読有り

    Jianke Fan, Dapeng Zhao, Dongdong Dong, Guangxu Zhang

    JOURNAL OF ASIAN EARTH SCIENCES 146 76-89 2017年9月

    DOI: 10.1016/j.jseaes.2017.05.015  

    ISSN:1367-9120

    eISSN:1878-5786

  185. Mantle transition zone discontinuities beneath the Tien Shan 査読有り

    Yu, Y, D. Zhao, J. Lei

    Geophys. J. Int. 2017年7月

  186. P-wave anisotropy, mantle wedge flow and olivine fabrics beneath Japan 査読有り

    Xin Liu, Dapeng Zhao

    Geophysical Journal International 210 1410-1431 2017年6月8日

  187. Seismic anisotropy evidence for dehydration embrittlement triggering intermediate-depth earthquakes 査読有り

    Jian Wang, Dapeng Zhao, Zhenxing Yao

    SCIENTIFIC REPORTS 7 2017年6月

    DOI: 10.1038/s41598-017-02563-w  

    ISSN:2045-2322

  188. P wave anisotropic tomography of the Alps 査読有り

    Yuanyuan Hua, Dapeng Zhao, Yixian Xu

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 122 (6) 4509-4528 2017年6月

    DOI: 10.1002/2016JB013831  

    ISSN:2169-9313

    eISSN:2169-9356

  189. Seismic imaging of the crust and uppermost mantle beneath the Qilian Orogenic Belt and its geodynamic implications 査読有り

    Ziteng Ding, Bin Cheng, Yunpeng Dong, Dapeng Zhao

    TECTONOPHYSICS 705 63-79 2017年5月

    DOI: 10.1016/j.tecto.2017.03.016  

    ISSN:0040-1951

    eISSN:1879-3266

  190. P and S wave attenuation tomography of the Japan subduction zone 査読有り

    Zewei Wang, Dapeng Zhao, Xin Liu, Chuanxu Chen, Xibing Li

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 18 (4) 1688-1710 2017年4月

    DOI: 10.1002/2017GC006800  

    ISSN:1525-2027

  191. Age of the subducting Pacific slab beneath East Asia and its geodynamic implications 査読有り

    Xin Liu, Dapeng Zhao, Sanzhong Li, Wei Wei

    EARTH AND PLANETARY SCIENCE LETTERS 464 166-174 2017年4月

    DOI: 10.1016/j.epsl.2017.02.024  

    ISSN:0012-821X

    eISSN:1385-013X

  192. Seismic attenuation tomography of the source zone of the 2016 Kumamoto earthquake (M 7.3) 査読有り

    Zewei Wang, Dapeng Zhao, Xin Liu, Xibing Li

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 122 (4) 2988-3007 2017年4月

    DOI: 10.1002/2016JB013704  

    ISSN:2169-9313

    eISSN:2169-9356

  193. Tomography of the subducting Pacific slab and the 2015 Bonin deepest earthquake (Mw 7.9) 査読有り

    Dapeng Zhao, Moeto Fujisawa, Genti Toyokuni

    SCIENTIFIC REPORTS 7 (44487) 2017年3月

    DOI: 10.1038/srep44487  

    ISSN:2045-2322

  194. Mantle structure beneath the incipient Okavango rift zone in southern Africa 査読有り

    Youqiang Yu, Kelly H. Liu, Zhouchuan Huang, Dapeng Zhao, Cory A. Reed, Moikwathai Moidaki, Jianshe Lei, Stephen S. Gao

    GEOSPHERE 13 (1) 102-111 2017年2月

    DOI: 10.1130/GES01331.1  

    ISSN:1553-040X

  195. Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia 査読有り

    Chen, C, D. Zhao, Y. Tian, S. Wu, A. Hasegawa, J. Lei, J. Park, I. Kang

    Geophys. J. Inter 209 68-85 2017年1月5日

  196. Groundwater helium anomaly reflects strain change during the 2016 Kumamoto earthquake in Southwest Japan 査読有り

    Yuji Sano, Naoto Takahata, Takanori Kagoshima, Tomo Shibata, Tetsuji Onoue, Dapeng Zhao

    SCIENTIFIC REPORTS 6 (37939) 2016年11月

    DOI: 10.1038/srep37939  

    ISSN:2045-2322

  197. Backarc spreading and mantle wedge flow beneath the Japan Sea: insight from Rayleigh-wave anisotropic tomography 査読有り

    Xin Liu, Dapeng Zhao

    GEOPHYSICAL JOURNAL INTERNATIONAL 207 (1) 357-373 2016年10月

    DOI: 10.1093/gji/ggw288  

    ISSN:0956-540X

    eISSN:1365-246X

  198. Tomography of the source zone of the 2016 South Taiwan earthquake 査読有り

    Genti Toyokuni, Dapeng Zhao, Kate Huihsuan Chen

    GEOPHYSICAL JOURNAL INTERNATIONAL 207 (1) 635-643 2016年10月

    DOI: 10.1093/gji/ggw304  

    ISSN:0956-540X

    eISSN:1365-246X

  199. Complex deformation in western Tibet revealed by anisotropic tomography 査読有り

    Heng Zhang, Junmeng Zhao, Dapeng Zhao, Chunquan Yu, Hongbing Liu, Zhaoguo Hu

    EARTH AND PLANETARY SCIENCE LETTERS 451 97-107 2016年10月

    DOI: 10.1016/j.epsl.2016.07.020  

    ISSN:0012-821X

    eISSN:1385-013X

  200. The 2013 Wyoming upper mantle earthquakes: Tomography and tectonic implications 査読有り

    Xinyang Wang, Dapeng Zhao, Jiabiao Li

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121 (9) 6797-6808 2016年9月

    DOI: 10.1002/2016JB013118  

    ISSN:2169-9313

    eISSN:2169-9356

  201. Teleseismic imaging of the mantle beneath southernmost China: New insights into the Hainan plume 査読有り

    Shaohong Xia, Dapeng Zhao, Jinlong Sun, Haibo Huang

    GONDWANA RESEARCH 36 46-56 2016年8月

    DOI: 10.1016/j.gr.2016.05.003  

    ISSN:1342-937X

    eISSN:1878-0571

  202. Mantle transition zone structure beneath the Changbai volcano: Insight into deep slab dehydration and hot upwelling near the 410km discontinuity 査読有り

    You Tian, Hongxiang Zhu, Dapeng Zhao, Cai Liu, Xuan Feng, Ting Liu, Jincheng Ma

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121 (8) 5794-5808 2016年8月

    DOI: 10.1002/2016JB012959  

    ISSN:2169-9313

    eISSN:2169-9356

  203. Seismic velocity azimuthal anisotropy of the Japan subduction zone: Constraints from P and S wave traveltimes 査読有り

    Xin Liu, Dapeng Zhao

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121 (7) 5086-5115 2016年7月

    DOI: 10.1002/2016JB013116  

    ISSN:2169-9313

    eISSN:2169-9356

  204. Depth variations of P-wave azimuthal anisotropy beneath Mainland China 査読有り

    Wei Wei, Dapeng Zhao, Jiandong Xu, Bengang Zhou, Yaolin Shi

    SCIENTIFIC REPORTS 6 (29614) 2016年7月

    DOI: 10.1038/srep29614  

    ISSN:2045-2322

  205. Crack mystery of the damaging Kumamoto earthquakes 査読有り

    Dapeng Zhao, Xin Liu

    SCIENCE BULLETIN 61 (11) 868-870 2016年6月

    DOI: 10.1007/s11434-016-1100-4  

    ISSN:2095-9273

    eISSN:2095-9281

  206. Seismic anisotropy tomography: New insight into subduction dynamics 査読有り

    Dapeng Zhao, Sheng Yu, Xin Liu

    GONDWANA RESEARCH 33 24-43 2016年5月

    DOI: 10.1016/j.gr.2015.05.008  

    ISSN:1342-937X

    eISSN:1878-0571

  207. Varying deformation patterns in central Tibet revealed by radial anisotropy tomography 査読有り

    Heng Zhang, Dapeng Zhao, Chunquan Yu, Junmeng Zhao

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121 (5) 3445-3461 2016年5月

    DOI: 10.1002/2016JB012832  

    ISSN:2169-9313

    eISSN:2169-9356

  208. Teleseismic P-wave tomography and mantle dynamics beneath Eastern Tibet 査読有り

    Jianshe Lei, Dapeng Zhao

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 17 (5) 1861-1884 2016年5月

    DOI: 10.1002/2016GC006262  

    ISSN:1525-2027

  209. Tomography of the source zone of the 2015 M 7.8 Nepal earthquake 査読有り

    Wei Wei, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 253 58-63 2016年4月

    DOI: 10.1016/j.pepi.2016.01.008  

    ISSN:0031-9201

    eISSN:1872-7395

  210. Imaging of magma intrusions beneath Harrat Al-Madinah in Saudi Arabia 査読有り

    Mohamed F. Abdelwahed, Nabil El-Marry, Mohamed Rashad Moufti, Catherine Lewis Kenedi, Dapeng Zhao, Hani Zahran, Jamal Shawali

    JOURNAL OF ASIAN EARTH SCIENCES 120 17-28 2016年4月

    DOI: 10.1016/j.jseaes.2016.01.023  

    ISSN:1367-9120

    eISSN:1878-5786

  211. P wave azimuthal and radial anisotropy of the Hokkaido subduction zone 査読有り

    Xiongwei Niu, Dapeng Zhao, Jiabiao Li, Aiguo Ruan

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121 (4) 2636-2660 2016年4月

    DOI: 10.1002/2015JB012651  

    ISSN:2169-9313

    eISSN:2169-9356

  212. Seismic tomography and anisotropy of the Helan-Liupan tectonic belt: Insight into lower crustal flow and seismotectonics 査読有り

    Bin Cheng, Dapeng Zhao, Shunyou Cheng, Ziteng Ding, Guowei Zhang

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121 (4) 2608-2635 2016年4月

    DOI: 10.1002/2015JB012692  

    ISSN:2169-9313

    eISSN:2169-9356

  213. Large earthquakes and structural heterogeneity in Eastern Tibetan Plateau. 査読有り

    Lei, J, D. Zhao

    AGU Book “Plate Boundaries and Natural Hazards” pp.167-191 2016年3月

  214. P and S wave tomography of Japan subduction zone from joint inversions of local and teleseismic travel times and surface-wave data 査読有り

    Xin Liu, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 252 1-22 2016年3月

    DOI: 10.1016/j.pepi.2016.01.002  

    ISSN:0031-9201

    eISSN:1872-7395

  215. Subduction of a buoyant plateau at the Manila Trench: Tomographic evidence and geodynamic implications 査読有り

    Jianke Fan, Dapeng Zhao, Dongdong Dong

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 17 (2) 571-586 2016年2月

    DOI: 10.1002/2015GC006201  

    ISSN:1525-2027

  216. Teleseismic shear wave tomography of the Japan subduction zone 査読有り

    Koichi Asamori, Dapeng Zhao

    GEOPHYSICAL JOURNAL INTERNATIONAL 203 (3) 1752-1772 2015年12月

    DOI: 10.1093/gji/ggv334  

    ISSN:0956-540X

    eISSN:1365-246X

  217. A seismic transect across West Antarctica: Evidence for mantle thermal anomalies beneath the Bentley Subglacial Trench and the Marie Byrd Land Dome 査読有り

    Andrew J. Lloyd, Douglas A. Wiens, Andrew A. Nyblade, Sridhar Anandakrishnan, Richard C. Aster, Audrey D. Huerta, Terry J. Wilson, Ian W. D. Dalziel, Patrick J. Shore, Dapeng Zhao

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 120 (12) 8439-8460 2015年12月

    DOI: 10.1002/2015JB012455  

    ISSN:2169-9313

    eISSN:2169-9356

  218. Mantle dynamics and Cretaceous magmatism in east-central China: Insight from teleseismic tomograms 査読有り

    Guoming Jiang, Guibin Zhang, Dapeng Zhao, Qingtian Lu, Hongyi Li, Xinfu Li

    TECTONOPHYSICS 664 256-268 2015年11月

    DOI: 10.1016/j.tecto.2015.09.019  

    ISSN:0040-1951

    eISSN:1879-3266

  219. Lateral variation of crustal structure and composition in the Cathaysia block of South China and its geodynamic implications 査読有り

    Shaohong Xia, Yusong Shen, Dapeng Zhao, Xuelin Qiu

    JOURNAL OF ASIAN EARTH SCIENCES 109 20-28 2015年9月

    DOI: 10.1016/j.jseaes.2015.05.010  

    ISSN:1367-9120

    eISSN:1878-5786

  220. Interior structure of the Moon: Constraints from seismic tomography, gravity and topography 査読有り

    Bernhard Steinberger, Dapeng Zhao, Stephanie C. Werner

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 245 26-39 2015年8月

    DOI: 10.1016/j.pepi.2015.05.005  

    ISSN:0031-9201

    eISSN:1872-7395

  221. Tomographic imaging of the underthrusting Indian slab and mantle upwelling beneath central Tibet 査読有り

    Heng Zhang, Dapeng Zhao, Junmeng Zhao, Hongbing Liu

    GONDWANA RESEARCH 28 (1) 121-132 2015年8月

    DOI: 10.1016/j.gr.2014.02.012  

    ISSN:1342-937X

    eISSN:1878-0571

  222. P wave tomography and anisotropy beneath Southeast Asia: Insight into mantle dynamics 査読有り

    Zhouchuan Huang, Dapeng Zhao, Liangshu Wang

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 120 (7) 5154-5174 2015年7月

    DOI: 10.1002/2015JB012098  

    ISSN:2169-9313

    eISSN:2169-9356

  223. On the trade-off between seismic anisotropy and heterogeneity: Numerical simulations and application to Northeast Japan 査読有り

    Zhouchuan Huang, Dapeng Zhao, Xin Liu

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 120 (5) 3255-3277 2015年5月

    DOI: 10.1002/2014JB011784  

    ISSN:2169-9313

    eISSN:2169-9356

  224. Seismic attenuation tomography of the Southwest Japan arc: new insight into subduction dynamics 査読有り

    Xin Liu, Dapeng Zhao

    GEOPHYSICAL JOURNAL INTERNATIONAL 201 (1) 135-156 2015年4月

    DOI: 10.1093/gji/ggv007  

    ISSN:0956-540X

    eISSN:1365-246X

  225. Tomographic imaging of the Cascadia subduction zone: Constraints on the Juan de Fuca slab 査読有り

    Chuanxu Chen, Dapeng Zhao, Shiguo Wu

    TECTONOPHYSICS 647 73-88 2015年4月

    DOI: 10.1016/j.tecto.2015.02.012  

    ISSN:0040-1951

    eISSN:1879-3266

  226. Recent advance in polar seismology: Global impact of the International Polar Year 査読有り

    Masaki Kanao, Dapeng Zhao, Douglas A. Wiens, Eleonore Stutzmann

    POLAR SCIENCE 9 (1) 1-4 2015年3月

    DOI: 10.1016/j.polar.2014.12.003  

    ISSN:1873-9652

    eISSN:1876-4428

  227. P and S wave tomography and anisotropy in Northwest Pacific and East Asia: Constraints on stagnant slab and intraplate volcanism 査読有り

    Wei Wei, Dapeng Zhao, Jiandong Xu, Feixiang Wei, Guoming Liu

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 120 (3) 1642-1666 2015年3月

    DOI: 10.1002/2014JB011254  

    ISSN:2169-9313

    eISSN:2169-9356

  228. The 2011 Tohoku earthquake (Mw 9.0) sequence and subduction dynamics in Western Pacific and East Asia 査読有り

    Dapeng Zhao

    JOURNAL OF ASIAN EARTH SCIENCES 98 26-49 2015年2月

    DOI: 10.1016/j.jseaes.2014.10.022  

    ISSN:1367-9120

    eISSN:1878-5786

  229. A water wall in the Tohoku forearc causing large crustal earthquakes 査読有り

    Dapeng Zhao, Hiroki Kitagawa, Genti Toyokuni

    GEOPHYSICAL JOURNAL INTERNATIONAL 200 (1) 149-172 2015年1月

    DOI: 10.1093/gji/ggu381  

    ISSN:0956-540X

    eISSN:1365-246X

  230. Detection of metastable olivine wedge in the western Pacific slab and its geodynamic implications 査読有り

    Guoming Jiang, Dapeng Zhao, Guibin Zhang

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 238 1-7 2015年1月

    DOI: 10.1016/j.pepi.2014.10.008  

    ISSN:0031-9201

    eISSN:1872-7395

  231. Structural control on the nucleation of megathrust earthquakes in the Nankai subduction zone 査読有り

    Xin Liu, Dapeng Zhao

    GEOPHYSICAL RESEARCH LETTERS 41 (23) 8288-8293 2014年12月

    DOI: 10.1002/2014GL062002  

    ISSN:0094-8276

    eISSN:1944-8007

  232. Late Mesozoic magmatic plumbing system in the onshore-offshore area of Hong Kong: Insight from 3-D active-source seismic tomography 査読有り

    Shaohong Xia, Dapeng Zhao

    JOURNAL OF ASIAN EARTH SCIENCES 96 46-58 2014年12月

    DOI: 10.1016/j.jseaes.2014.08.038  

    ISSN:1367-9120

    eISSN:1878-5786

  233. Genetic waveform modeling for the crustal structure in Northeast Japan 査読有り

    Mohamed F. Abdelwahed, Dapeng Zhao

    JOURNAL OF ASIAN EARTH SCIENCES 89 66-75 2014年8月

    DOI: 10.1016/j.jseaes.2014.03.017  

    ISSN:1367-9120

    eISSN:1878-5786

  234. Structural control on the Tohoku earthquake rupture process investigated by 3D FEM, tsunami and geodetic data 査読有り

    F. Romano, E. Trasatti, S. Lorito, C. Piromallo, A. Piatanesi, Y. Ito, D. Zhao, K. Hirata, P. Lanucara, M. Cocco

    SCIENTIFIC REPORTS 4 2014年7月

    DOI: 10.1038/srep05631  

    ISSN:2045-2322

  235. Three-dimensional P wave azimuthal anisotropy in the lithosphere beneath China 査読有り

    Zhouchuan Huang, Pan Wang, Dapeng Zhao, Liangshu Wang, Mingjie Xu

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 119 (7) 5686-5712 2014年7月

    DOI: 10.1002/2014JB010963  

    ISSN:2169-9313

    eISSN:2169-9356

  236. P wave radial anisotropy tomography of the upper mantle beneath the North China Craton 査読有り

    Jian Wang, Huohua Wu, Dapeng Zhao

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 15 (6) 2195-2210 2014年6月

    DOI: 10.1002/2014GC005279  

    ISSN:1525-2027

  237. Seismic structure of the Helan-Liupan-Ordos western margin tectonic belt in North-Central China and its geodynamic implications 査読有り

    Bin Cheng, Shunyou Cheng, Guowei Zhang, Dapeng Zhao

    JOURNAL OF ASIAN EARTH SCIENCES 87 141-156 2014年6月

    DOI: 10.1016/j.jseaes.2014.01.006  

    ISSN:1367-9120

    eISSN:1878-5786

  238. P-wave tomography and dynamics of the crust and upper mantle beneath western Tibet 査読有り

    Junmeng Zhao, Dapeng Zhao, Heng Zhang, Hongbing Liu, Ying Huang, Honggang Cheng, Wei Wang

    GONDWANA RESEARCH 25 (4) 1690-1699 2014年5月

    DOI: 10.1016/j.gr.2013.06.020  

    ISSN:1342-937X

    eISSN:1878-0571

  239. Crust and upper mantle structure of the New Madrid Seismic Zone: Insight into intraplate earthquakes 査読有り

    Chuanxu Chen, Dapeng Zhao, Shiguo Wu

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 230 1-14 2014年5月

    DOI: 10.1016/j.pepi.2014.01.016  

    ISSN:0031-9201

    eISSN:1872-7395

  240. Seismic attenuation tomography of the Northeast Japan arc: Insight into the 2011 Tohoku earthquake ( Mw 9.0) and subduction dynamics 査読有り

    Xin Liu, Dapeng Zhao, Sanzhong Li

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 119 (2) 1094-1118 2014年2月

    DOI: 10.1002/2013JB010591  

    ISSN:2169-9313

    eISSN:2169-9356

  241. Seismic evidence for a mantle plume beneath the Cape Verde hotspot 査読有り

    Xin Liu, Dapeng Zhao

    INTERNATIONAL GEOLOGY REVIEW 56 (10) 1213-1225 2014年

    DOI: 10.1080/00206814.2014.930720  

    ISSN:0020-6814

    eISSN:1938-2839

  242. Wave-equation-based travel-time seismic tomography-Part 1: Method 査読有り

    P. Tong, D. Zhao, D. Yang, X. Yang, J. Chen, Q. Liu

    SOLID EARTH 5 (2) 1151-1168 2014年

    DOI: 10.5194/se-5-1151-2014  

    ISSN:1869-9510

    eISSN:1869-9529

  243. Wave-equation-based travel-time seismic tomography-Part 2: Application to the 1992 Landers earthquake (M-w 7.3) area 査読有り

    P. Tong, D. Zhao, D. Yang, X. Yang, J. Chen, Q. Liu

    SOLID EARTH 5 (2) 1169-1188 2014年

    DOI: 10.5194/se-5-1169-2014  

    ISSN:1869-9510

    eISSN:1869-9529

  244. Complex slab structure and arc magmatism beneath the Japanese Islands 査読有り

    Hasegawa, A, J. Nakajima, T. Yanada, N. Uchida, T. Okada, D. Zhao, T. Matsuzawa, N. Umino

    Journal of Asian Earth Sciences 78 277-290 2013年12月

    DOI: 10.1016/j.jseaes.2012.12.031  

    ISSN:1367-9120

  245. Mapping P-wave azimuthal anisotropy in the crust and upper mantle beneath the United States 査読有り

    Zhouchuan Huang, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 225 28-40 2013年12月

    DOI: 10.1016/j.pepi.2013.10.003  

    ISSN:0031-9201

    eISSN:1872-7395

  246. Reactivation and mantle dynamics of North China Craton: insight from P-wave anisotropy tomography 査読有り

    You Tian, Dapeng Zhao

    GEOPHYSICAL JOURNAL INTERNATIONAL 195 (3) 1796-1810 2013年12月

    DOI: 10.1093/gji/ggt333  

    ISSN:0956-540X

    eISSN:1365-246X

  247. Changbai intraplate volcanism and deep earthquakes in East Asia: a possible link? 査読有り

    Dapeng Zhao, You Tian

    GEOPHYSICAL JOURNAL INTERNATIONAL 195 (2) 706-724 2013年11月

    DOI: 10.1093/gji/ggt289  

    ISSN:0956-540X

    eISSN:1365-246X

  248. Aseismic deep subduction of the Philippine Sea plate and slab window 査読有り

    Zhouchuan Huang, Dapeng Zhao, Akira Hasegawa, Norihito Umino, Jung-Ho Park, Ik-Bum Kang

    JOURNAL OF ASIAN EARTH SCIENCES 75 82-94 2013年10月

    DOI: 10.1016/j.jseaes.2013.07.002  

    ISSN:1367-9120

  249. P-wave anisotropic tomography in Southeast Tibet: New insight into the lower crustal flow and seismotectonics 査読有り

    Wei Wei, Dapeng Zhao, Jiandong Xu

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 222 47-57 2013年9月

    DOI: 10.1016/j.pepi.2013.07.002  

    ISSN:0031-9201

  250. Seismic heterogeneity and anisotropy of the southern Kuril arc: insight into megathrust earthquakes 査読有り

    Xin Liu, Dapeng Zhao, Sanzhong Li

    GEOPHYSICAL JOURNAL INTERNATIONAL 194 (2) 1069-1090 2013年8月

    DOI: 10.1093/gji/ggt150  

    ISSN:0956-540X

    eISSN:1365-246X

  251. P-wave tomography for 3-D radial and azimuthal anisotropy of Tohoku and Kyushu subduction zones 査読有り

    Jian Wang, Dapeng Zhao

    GEOPHYSICAL JOURNAL INTERNATIONAL 193 (3) 1166-1181 2013年6月

    DOI: 10.1093/gji/ggt086  

    ISSN:0956-540X

  252. The 2008 Iwate-Miyagi earthquake (M 7.2) and arc volcanism: Insight from irregular-grid tomography 査読有り

    Wei, W, D. Zhao

    Earth Science Frontiers 20 (2) 155-171 2013年6月

  253. Upper mantle seismic structure beneath central East Antarctica from body wave tomography: Implications for the origin of the Gamburtsev Subglacial Mountains 査読有り

    Andrew J. Lloyd, Andrew A. Nyblade, Douglas A. Wiens, Patrick J. Shore, Samantha E. Hansen, Masaki Kanao, Dapeng Zhao

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 14 (4) 902-920 2013年4月

    DOI: 10.1002/ggge.20098  

    ISSN:1525-2027

  254. Towards Mapping the Three-Dimensional Distribution of Water in the Transition Zone from P-Velocity Tomography and 660-Km Discontinuity Depths

    Daisuke Suetsugu, Toru Inoue, Akira Yamada, Dapeng Zhao, Masayuki Obayashi

    Earth's Deep Water Cycle 237-249 2013年3月19日

    出版者・発行元: Wiley Blackwell

    DOI: 10.1029/168GM18  

  255. Seismic imaging of the Southwest Japan arc from the Nankai trough to the Japan Sea 査読有り

    Xin Liu, Dapeng Zhao, Sanzhong Li

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 216 59-73 2013年3月

    DOI: 10.1016/j.pepi.2013.01.003  

    ISSN:0031-9201

    eISSN:1872-7395

  256. Global mantle heterogeneity and its influence on teleseismic regional tomography 査読有り

    Dapeng Zhao, Yoshihiro Yamamoto, Takahiro Yanada

    Gondwana Research 23 (2) 595-616 2013年3月

    DOI: 10.1016/j.gr.2012.08.004  

    ISSN:1342-937X

  257. Relocating the 2011 Tohoku-oki earthquakes (M 6.0-9.0) 査読有り

    Zhouchuan Huang, Dapeng Zhao

    TECTONOPHYSICS 586 35-45 2013年2月

    DOI: 10.1016/j.tecto.2012.10.019  

    ISSN:0040-1951

    eISSN:1879-3266

  258. Evolution of late Cenozoic magmatism and the crust–mantle structure in the NE Japan Arc 査読有り

    Takeyoshi Yoshida, Jun-Ichi Kimura, Ryoichi Yamada, Valerio Acocella, Hiroshi Sato, Dapeng Zhao, Junichi Nakajima, Akira Hasegawa, Tomomi Okada, Satoru Honda, Masahiro Ishikawa, Oky Dicky Ardiansyah Prima, Takeshi Kudo, Bunichiro Shibazaki, Akiko Tanaka, Toshifumi Imaizumi

    Geological Society, London, Special Publications 385 (1) 2013年

    DOI: 10.1144/SP385.15  

    ISSN:0305-8719

  259. Crustal and uppermost mantle structure and seismotectonics of North China Craton 査読有り

    Jian Wang, Dapeng Zhao, Zhenxing Yao

    TECTONOPHYSICS 582 177-187 2013年1月

    DOI: 10.1016/j.tecto.2012.10.004  

    ISSN:0040-1951

  260. Mechanism of the 2011 tohoku-oki earthquake (Mw 9.0) and tsunami: Insight from seismic tomography 査読有り

    Zhouchuan Huang, Dapeng Zhao

    Journal of Asian Earth Sciences 70-71 (1) 160-168 2013年

    出版者・発行元: Elsevier Ltd

    DOI: 10.1016/j.jseaes.2013.03.010  

    ISSN:1367-9120

  261. Observation of high-frequency PKiKP in Japan: Insight into fine structure of inner core boundary 査読有り

    Guoming Jiang, Dapeng Zhao

    JOURNAL OF ASIAN EARTH SCIENCES 59 167-184 2012年10月

    DOI: 10.1016/j.jseaes.2012.07.017  

    ISSN:1367-9120

    eISSN:1878-5786

  262. East Asia mantle tomography: New insight into plate subduction and intraplate volcanism 査読有り

    Wei Wei, Jiandong Xu, Dapeng Zhao, Yaolin Shi

    JOURNAL OF ASIAN EARTH SCIENCES 60 88-103 2012年10月

    DOI: 10.1016/j.jseaes.2012.08.001  

    ISSN:1367-9120

  263. Imaging the subducting slabs and mantle upwelling under the Japan Islands 査読有り

    Dapeng Zhao, T. Yanada, A. Hasegawa, N. Umino, Wei Wei

    GEOPHYSICAL JOURNAL INTERNATIONAL 190 (2) 816-828 2012年8月

    DOI: 10.1111/j.1365-246X.2012.05550.x  

    ISSN:0956-540X

  264. Seismic anisotropy and heterogeneity in the Alaska subduction zone 査読有り

    You Tian, Dapeng Zhao

    GEOPHYSICAL JOURNAL INTERNATIONAL 190 (1) 629-649 2012年7月

    DOI: 10.1111/j.1365-246X.2012.05512.x  

    ISSN:0956-540X

  265. Seismic tomography and geochemical evidence for lunar mantle heterogeneity: Comparing with Earth 査読有り

    Dapeng Zhao, Tomoko Arai, Lucy Liu, Eiji Ohtani

    GLOBAL AND PLANETARY CHANGE 90-91 29-36 2012年6月

    DOI: 10.1016/j.gloplacha.2012.01.004  

    ISSN:0921-8181

  266. P-wave tomography of the western United States: Insight into the Yellowstone hotspot and the Juan de Fuca slab 査読有り

    You Tian, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 200 72-84 2012年6月

    DOI: 10.1016/j.pepi.2012.04.004  

    ISSN:0031-9201

    eISSN:1872-7395

  267. Convergence of the Indian and Eurasian plates under eastern Tibet revealed by seismic tomography 査読有り

    Heng Zhang, Dapeng Zhao, Junmeng Zhao, Qiang Xu

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 13 (Q06W14) 2012年6月

    DOI: 10.1029/2012GC004031  

    ISSN:1525-2027

  268. P wave anisotropic tomography of the Nankai subduction zone in Southwest Japan 査読有り

    Jian Wang, Dapeng Zhao

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 13 (Q05017) 2012年5月

    DOI: 10.1029/2012GC004081  

    ISSN:1525-2027

  269. 沈み込み帯の地震の発生機構-地殻流体に規定されて発生する沈み込み帯の地震 査読有り

    長谷川昭, 中島淳一, 内田直希, 梁田高広, 岡田知己, 趙 大鵬, 松澤 暢, 海野徳仁

    地学雑誌 121 (1) 128-160 2012年3月

    出版者・発行元: 公益社団法人 東京地学協会

    DOI: 10.5026/jgeography.121.128  

    ISSN:0022-135X

    詳細を見る 詳細を閉じる

    &emsp;The mechanisms that generate the three main types of earthquake in subduction zones are discussed addressing their relations to geofluids. Studies on the spatial distribution of earthquakes and seismic velocity structure within the subducted slab provide evidence that strongly supports the dehydration embrittlement hypothesis for the generation of intermediate-depth intraslab earthquakes. Detailed imaging of the seismic velocity structure in and around plate boundary zones suggests that interplate coupling is mainly controlled by local fluid over-pressure. Seismic tomography studies show the existence of inclined sheet-like seismic low-velocity zones in the mantle wedge, not only in Tohoku but also in other areas in Japan, which perhaps correspond to the upwelling flow of the subduction-induced convection system. These upwelling flows reach the Moho directly beneath the volcanic areas, suggesting that those volcanic areas are formed by the upwelling flows. Aqueous fluids derived from the slab are probably transported up through the upwelling flows to the arc crust, where they might weaken the surrounding crustal rocks and finally cause shallow inland earthquakes. All of these observations suggest that geofluids expelled from the subducting slab play an important role in the generation of earthquakes in subduction zones.

  270. Tomography and dynamics of Western-Pacific subduction zones 招待有り 査読有り

    Zhao, D

    Monogr. Environ. Earth Planets 1 (1) 1-70 2012年3月

    出版者・発行元: TERRAPUB

    DOI: 10.5047/meep.2012.00101.0001  

    ISSN:2186-4837

  271. Mapping the Tohoku forearc: Implications for the mechanism of the 2011 East Japan earthquake (Mw 9.0) 査読有り

    Zhi Wang, Wenli Huang, Dapeng Zhao, Shunping Pei

    TECTONOPHYSICS 524 147-154 2012年2月

    DOI: 10.1016/j.tecto.2011.12.032  

    ISSN:0040-1951

    eISSN:1879-3266

  272. Tomography of the 2011 Iwaki earthquake (M 7.0) and Fukushima nuclear power plant area 査読有り

    P. Tong, D. Zhao, D. Yang

    SOLID EARTH 3 (1) 43-51 2012年

    DOI: 10.5194/se-3-43-2012  

    ISSN:1869-9510

  273. Metastable olivine wedge in the subducting Pacific slab and its relation to deep earthquakes 査読有り

    Guoming Jiang, Dapeng Zhao

    JOURNAL OF ASIAN EARTH SCIENCES 42 (6) 1411-1423 2011年11月

    DOI: 10.1016/j.jseaes.2011.08.005  

    ISSN:1367-9120

  274. Destruction mechanism of the North China Craton: Insight from P and S wave mantle tomography 査読有り

    You Tian, Dapeng Zhao

    JOURNAL OF ASIAN EARTH SCIENCES 42 (6) 1132-1145 2011年11月

    DOI: 10.1016/j.jseaes.2011.06.010  

    ISSN:1367-9120

  275. Low-frequency earthquakes and tomography in western Japan: Insight into fluid and magmatic activity 査読有り

    Dapeng Zhao, Wei Wei, Yukihisa Nishizono, Hirohito Inakura

    JOURNAL OF ASIAN EARTH SCIENCES 42 (6) 1381-1393 2011年11月

    DOI: 10.1016/j.jseaes.2011.08.003  

    ISSN:1367-9120

  276. Rupture process of the 9 March, 2011 Mw 7.4 Sanriku-Oki, Japan earthquake constrained by jointly inverting teleseismic waveforms, strong motion data and GPS observations 査読有り

    Guangfu Shao, Chen Ji, Dapeng Zhao

    GEOPHYSICAL RESEARCH LETTERS 38 L00G20 2011年11月

    DOI: 10.1029/2011GL049164  

    ISSN:0094-8276

    eISSN:1944-8007

  277. Tomography of the 1995 Kobe earthquake area: comparison of finite-frequency and ray approaches 査読有り

    Ping Tong, Dapeng Zhao, Dinghui Yang

    GEOPHYSICAL JOURNAL INTERNATIONAL 187 (1) 278-302 2011年10月

    DOI: 10.1111/j.1365-246X.2011.05139.x  

    ISSN:0956-540X

  278. Seismic imaging of the Amur-Okhotsk plate boundary zone in the Japan Sea 査読有り

    Dapeng Zhao, Zhouchuan Huang, Norihito Umino, Akira Hasegawa, Takeyoshi Yoshida

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 188 (1-2) 82-95 2011年9月

    DOI: 10.1016/j.pepi.2011.06.013  

    ISSN:0031-9201

  279. Structural heterogeneity in the megathrust zone and mechanism of the 2011 Tohoku-oki earthquake (Mw 9.0) 査読有り

    Dapeng Zhao, Zhouchuan Huang, Norihito Umino, Akira Hasegawa, Hiroo Kanamori

    GEOPHYSICAL RESEARCH LETTERS 38 2011年9月

    DOI: 10.1029/2011GL048408  

    ISSN:0094-8276

  280. Crustal heterogeneity in the 2007 Noto-Hanto earthquake area and its geodynamical implications 査読有り

    Simanchal Padhy, O. P. Mishra, Dapeng Zhao, Wei Wei

    TECTONOPHYSICS 509 (1-2) 55-68 2011年8月

    DOI: 10.1016/j.tecto.2011.06.002  

    ISSN:0040-1951

    eISSN:1879-3266

  281. Seismic anisotropy and mantle dynamics beneath China 査読有り

    Zhouchuan Huang, Liangshu Wang, Dapeng Zhao, Ning Mia, Mingjie Xu

    EARTH AND PLANETARY SCIENCE LETTERS 306 (1-2) 105-117 2011年6月

    DOI: 10.1016/j.epsl.2011.03.038  

    ISSN:0012-821X

    eISSN:1385-013X

  282. Stress field in the 2008 Iwate-Miyagi earthquake (M7.2) area 査読有り

    Zhouchuan Huang, Dapeng Zhao, Liangshu Wang

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 12 Q06006 2011年6月

    DOI: 10.1029/2011GC003626  

    ISSN:1525-2027

  283. Frequency-dependent shear-wave splitting and multilayer anisotropy in northeast Japan 査読有り

    Zhouchuan Huang, Dapeng Zhao, Liangshu Wang

    GEOPHYSICAL RESEARCH LETTERS 38 L08302 2011年4月

    DOI: 10.1029/2011GL046804  

    ISSN:0094-8276

  284. An attempt to detect temporal variations of crustal structure in the source area of the 2006 Wen-An earthquake in North China 査読有り

    Jianshe Lei, Dapeng Zhao, Furen Xie, Jie Liu

    JOURNAL OF ASIAN EARTH SCIENCES 40 (4) 958-976 2011年3月

    DOI: 10.1016/j.jseaes.2010.07.003  

    ISSN:1367-9120

    eISSN:1878-5786

  285. Seismic heterogeneity and anisotropy of the Honshu arc from the Japan Trench to the Japan Sea 査読有り

    Zhouchuan Huang, Dapeng Zhao, Liangshu Wang

    GEOPHYSICAL JOURNAL INTERNATIONAL 184 (3) 1428-1444 2011年3月

    DOI: 10.1111/j.1365-246X.2011.04934.x  

    ISSN:0956-540X

    eISSN:1365-246X

  286. Seismic tomography and anisotropy in the source area of the 2008 Iwate-Miyagi earthquake (M 7.2) 査読有り

    Bin Cheng, Dapeng Zhao, Guowei Zhang

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 184 (3-4) 172-185 2011年2月

    DOI: 10.1016/j.pepi.2010.11.006  

    ISSN:0031-9201

  287. East Asia: Seismotectonics, magmatism and mantle dynamics 査読有り

    Dapeng Zhao, Sheng Yu, Eiji Ohtani

    JOURNAL OF ASIAN EARTH SCIENCES 40 (3) 689-709 2011年2月

    DOI: 10.1016/j.jseaes.2010.11.013  

    ISSN:1367-9120

  288. New seismic evidence for the origin of arc and back-arc magmas

    Dapeng Zhao, Sadato Ueki, Yukihisa Nishizono, Akira Yamada

    Topics in Igneous Petrology 117-132 2011年

    出版者・発行元: Springer Netherlands

    DOI: 10.1007/978-90-481-9600-5_6  

  289. Shear wave anisotropy in the crust, mantle wedge, and subducting Pacific slab under northeast Japan 査読有り

    Zhouchuan Huang, Dapeng Zhao, Liangshu Wang

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 12 Q01002 2011年1月

    DOI: 10.1029/2010GC003343  

    ISSN:1525-2027

  290. Deep structure and seismogenesis of the north-south seismic zone in southwest China 査読有り

    Zhi Wang, Dapeng Zhao, Jian Wang

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 115 B12334 2010年12月

    DOI: 10.1029/2010JB007797  

    ISSN:0148-0227

  291. Density of high-Ti basalt magma at high pressure and origin of heterogeneities in the lunar mantle 査読有り

    Tatsuya Sakamaki, Eiji Ohtani, Satoru Urakawa, Akio Suzuki, Yoshinori Katayama, Dapeng Zhao

    EARTH AND PLANETARY SCIENCE LETTERS 299 (3-4) 285-289 2010年11月

    DOI: 10.1016/j.epsl.2010.09.007  

    ISSN:0012-821X

  292. Mapping P-wave anisotropy of the Honshu arc from Japan Trench to the back-arc 査読有り

    Jian Wang, Dapeng Zhao

    JOURNAL OF ASIAN EARTH SCIENCES 39 (5) 396-407 2010年10月

    DOI: 10.1016/j.jseaes.2010.04.009  

    ISSN:1367-9120

    eISSN:1878-5786

  293. Upper mantle structure and dynamics beneath Southeast China 査読有り

    Zhouchuan Huang, Liangshu Wang, Dapeng Zhao, Mingjie Xu, Ning Mi, Dayong Yu, Hua Li, Cheng Li

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 182 (3-4) 161-169 2010年10月

    DOI: 10.1016/j.pepi.2010.07.010  

    ISSN:0031-9201

  294. Mantle transition zone topography and structure beneath the central Tien Shan orogenic belt 査読有り

    Xiaobo Tian, Dapeng Zhao, Hongshuang Zhang, You Tian, Zhongjie Zhang

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 115 B10308 2010年10月

    DOI: 10.1029/2008JB006229  

    ISSN:2169-9313

    eISSN:2169-9356

  295. Deep structure and origin of active volcanoes in China 査読有り

    Dapeng Zhao, Lucy Liu

    Geoscience Frontiers 1 (1) 31-44 2010年10月

    DOI: 10.1016/j.gsf.2010.08.002  

    ISSN:1674-9871

  296. Mantle structure and dynamics under East Russia and adjacent regions 査読有り

    Dapeng Zhao, Franko Pirajno, Nikolai L. Dobretsov, Lucy Liu

    RUSSIAN GEOLOGY AND GEOPHYSICS 51 (9) 925-938 2010年9月

    DOI: 10.1016/j.rgg.2010.08.003  

    ISSN:1068-7971

  297. Tracing the Indian lithospheric mantle beneath central Tibetan Plateau using teleseismic tomography 査読有り

    Rizheng He, Dapeng Zhao, Rui Gao, Hongwei Zheng

    TECTONOPHYSICS 491 (1-4) 230-243 2010年8月

    DOI: 10.1016/j.tecto.2010.03.015  

    ISSN:0040-1951

  298. P-wave tomography, anisotropy and seismotectonics in the eastern margin of Japan Sea 査読有り

    Zhouchuan Huang, Dapeng Zhao, Norihito Umino, Liangshu Wang, Toni Matsuzawa, Akira Hasegawa, Takeyoshi Yoshida

    TECTONOPHYSICS 489 (1-4) 177-188 2010年6月

    DOI: 10.1016/j.tecto.2010.04.014  

    ISSN:0040-1951

  299. Relationships between volcano distribution, crustal structure, and P-wave tomography: an example from the Abu Monogenetic Volcano Group, SW Japan 査読有り

    Koji Kiyosugi, C. B. Connor, D. Zhao, L. J. Connor, K. Tanaka

    BULLETIN OF VOLCANOLOGY 72 (3) 331-340 2010年4月

    DOI: 10.1007/s00445-009-0316-4  

    ISSN:0258-8900

  300. Dissecting large earthquakes in Japan: Role of arc magma and fluids 査読有り

    Dapeng Zhao, M. Santosh, Akira Yamada

    ISLAND ARC 19 (1) 4-16 2010年3月

    DOI: 10.1111/j.1440-1738.2009.00694.x  

    ISSN:1038-4871

  301. Mantle dynamics of the Paleoproterozoic North China Craton: A perspective based on seismic tomography 査読有り

    M. Santosh, Dapeng Zhao, Timothy Kusky

    JOURNAL OF GEODYNAMICS 49 (1) 39-53 2010年1月

    DOI: 10.1016/j.jog.2009.09.043  

    ISSN:0264-3707

  302. Tectonics of the Japanese Islands and surrounding regions: Introduction 査読有り

    Zhao Dapeng, Santosh M, Maruyama Shigenori

    GONDWANA RESEARCH 16 (3-4) 365-367 2009年12月

    DOI: 10.1016/j.gr.2009.07.004  

    ISSN:1342-937X

  303. A tribute to Professor Akira Hasegawa

    D. Zhao, M. Santosh, S. Maruyama

    Gondwana Research 16 368-369 2009年12月1日

    DOI: 10.1016/j.gr.2009.05.005  

    ISSN:1342-937X

  304. Deep slab subduction and dehydration and their geodynamic consequences: Evidence from seismology and mineral physics 査読有り

    Dapeng Zhao, Eiji Ohtani

    GONDWANA RESEARCH 16 (3-4) 401-413 2009年12月

    DOI: 10.1016/j.gr.2009.01.005  

    ISSN:1342-937X

  305. The role of water in the deep upper mantle and transition zone: dehydration of stagnant slabs and its effects on the big mantle wedge 査読有り

    E. Ohtani, D. Zhao

    RUSSIAN GEOLOGY AND GEOPHYSICS 50 (12) 1073-1078 2009年12月

    DOI: 10.1016/j.rgg.2009.11.006  

    ISSN:1068-7971

  306. Seismological evidence for compositional variations at the base of the mantle transition zone under Japan Islands 査読有り

    Akira Yamada, Dapeng Zhao, Toru Inoue, Daisuke Suetsugu, Masayuki Obayashi

    GONDWANA RESEARCH 16 (3-4) 482-490 2009年12月

    DOI: 10.1016/j.gr.2009.04.009  

    ISSN:1342-937X

  307. Structural Heterogeneity in Northeast Japan and Its Implications for the Genesis of the 2004 and 2007 Niigata Earthquakes 査読有り

    Zhi Wang, Dapeng Zhao, Runqiu Huang, Xiangrong Tang, O. P. Mishra

    BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 99 (6) 3355-3373 2009年12月

    DOI: 10.1785/0120080281  

    ISSN:0037-1106

    eISSN:1943-3573

  308. Tomography of the westernmost Ryukyu subduction zone and the serpentinization of the fore-arc mantle 査読有り

    Han-Chiang Chou, Ban-Yuan Kuo, Ling-Yun Chiao, Dapeng Zhao, Shu-Huei Hung

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 114 B12301 2009年12月

    DOI: 10.1029/2008JB006192  

    ISSN:2169-9313

    eISSN:2169-9356

  309. The dynamics of big mantle wedge, magma factory, and metamorphic-metasomatic factory in subduction zones 査読有り

    S. Maruyama, A. Hasegawa, M. Santosh, T. Kogiso, S. Omori, H. Nakamura, K. Kawai, D. Zhao

    GONDWANA RESEARCH 16 (3-4) 414-430 2009年12月

    DOI: 10.1016/j.gr.2009.07.002  

    ISSN:1342-937X

  310. Plate subduction, and generation of earthquakes and magmas in Japan as inferred from seismic observations: An overview 査読有り

    Akira Hasegawa, Junichi Nakajima, Naoki Uchida, Tomomi Okada, Dapeng Zhao, Toru Matsuzawa, Norihito Umino

    GONDWANA RESEARCH 16 (3-4) 370-400 2009年12月

    DOI: 10.1016/j.gr.2009.03.007  

    ISSN:1342-937X

    eISSN:1878-0571

  311. Structural heterogeneity of the Longmenshan fault zone and the mechanism of the 2008 Wenchuan earthquake (Ms 8.0) 査読有り

    Jianshe Lei, Dapeng Zhao

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 10 Q10010 2009年10月

    DOI: 10.1029/2009GC002590  

    ISSN:1525-2027

  312. Structural heterogeneities in the crust and upper mantle beneath Taiwan 査読有り

    Zhi Wang, Yoshio Fukao, Dapeng Zhao, Shuichi Kodaira, O. P. Mishra, Akira Yamada

    TECTONOPHYSICS 476 (3-4) 460-477 2009年10月

    DOI: 10.1016/j.tecto.2009.07.018  

    ISSN:0040-1951

    eISSN:1879-3266

  313. Crustal tomography under the Median Tectonic Line in Southwest Japan using P and PmP data 査読有り

    Sandeep Gupta, Dapeng Zhao, M. Ikeda, S. Ueki, S. S. Rai

    JOURNAL OF ASIAN EARTH SCIENCES 35 (5) 377-390 2009年8月

    DOI: 10.1016/j.jseaes.2009.01.004  

    ISSN:1367-9120

  314. Seismic imaging of the upper mantle under the Erebus hotspot in Antarctica 査読有り

    Sandeep Gupta, Dapeng Zhao, S. S. Rai

    GONDWANA RESEARCH 16 (1) 109-118 2009年8月

    DOI: 10.1016/j.gr.2009.01.004  

    ISSN:1342-937X

    eISSN:1878-0571

  315. Upper-mantle velocity structure beneath the North China Craton: implications for lithospheric thinning 査読有り

    Peifen Xu, Dapeng Zhao

    GEOPHYSICAL JOURNAL INTERNATIONAL 177 (3) 1279-1283 2009年6月

    DOI: 10.1111/j.1365-246X.2009.04120.x  

    ISSN:0956-540X

    eISSN:1365-246X

  316. Multiscale seismic tomography and mantle dynamics 査読有り

    Dapeng Zhao

    GONDWANA RESEARCH 15 (3-4) 297-323 2009年6月

    DOI: 10.1016/j.gr.2008.07.003  

    ISSN:1342-937X

  317. Crustal correction in teleseismic tomography and its application 査読有り

    Jiang Guo-Ming, Zhao Da-Peng, Zhang Gui-Bin

    CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 52 (6) 1508-1514 2009年6月

    DOI: 10.3969/j.issn.0001-5733.2009.06.012  

    ISSN:0001-5733

  318. Seismic structure and origin of active intraplate volcanoes in Northeast Asia 査読有り

    Yonghong Duan, Dapeng Zhao, Xiankang Zhang, Shaohong Xia, Zhi Liu, Fuyun Wang, Li Li

    TECTONOPHYSICS 470 (3-4) 257-266 2009年5月

    DOI: 10.1016/j.tecto.2009.01.004  

    ISSN:0040-1951

  319. Insight into the origin of the Tengchong intraplate volcano and seismotectonics in southwest China from local and teleseismic data 査読有り

    Jianshe Lei, Dapeng Zhao, Youjin Su

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 114 B05302 2009年5月

    DOI: 10.1029/2008JB005881  

    ISSN:2169-9313

    eISSN:2169-9356

  320. Seismic image and origin of the Changbai intraplate volcano in East Asia: Role of big mantle wedge above the stagnant Pacific slab 査読有り

    Dapeng Zhao, You Tian, Jianshe Lei, Lucy Liu, Sihua Zheng

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 173 (3-4) 197-206 2009年4月

    DOI: 10.1016/j.pepi.2008.11.009  

    ISSN:0031-9201

  321. Seismic imaging of the crust and upper mantle under Beijing and surrounding regions 査読有り

    Jinli Huang, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 173 (3-4) 330-348 2009年4月

    DOI: 10.1016/j.pepi.2009.01.015  

    ISSN:0031-9201

  322. P-wave anisotropic tomography of the crust and upper mantle under Hokkaido, Japan 査読有り

    Jian Wang, Dapeng Zhao

    TECTONOPHYSICS 469 (1-4) 137-149 2009年4月

    DOI: 10.1016/j.tecto.2009.02.005  

    ISSN:0040-1951

  323. New seismic constraints on the upper mantle structure of the Hainan plume 査読有り

    Jianshe Lei, Dapeng Zhao, Bernhard Steinberger, Bateer Wu, Fanluan Shen, Zhixiong Li

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 173 (1-2) 33-50 2009年3月

    DOI: 10.1016/j.pepi.2008.10.013  

    ISSN:0031-9201

  324. Mapping the mantle wedge and interplate thrust zone of the northeast Japan arc 招待有り 査読有り

    Dapeng Zhao, Zhi Wang, N. Umino, A. Hasegawa

    TECTONOPHYSICS 467 (1-4) 89-106 2009年3月

    DOI: 10.1016/j.tecto.2008.12.017  

    ISSN:0040-1951

  325. Seismic tomography of the Pacific slab edge under Kamchatka 査読有り

    Guoming Jiang, Dapeng Zhao, Guibin Zhang

    TECTONOPHYSICS 465 (1-4) 190-203 2009年2月

    DOI: 10.1016/j.tecto.2008.11.019  

    ISSN:0040-1951

  326. Seismic imaging of the crust and upper mantle beneath the North China Craton 査読有り

    You Tian, Dapeng Zhao, Ruomei Sun, Jiwen Teng

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 172 (3-4) 169-182 2009年2月

    DOI: 10.1016/j.pepi.2008.09.002  

    ISSN:0031-9201

    eISSN:1872-7395

  327. Seismic tomography of the Moon 査読有り

    Zhao DaPeng, Lei JianShe, Lucy Liu

    CHINESE SCIENCE BULLETIN 53 (24) 3897-3907 2008年12月

    DOI: 10.1007/s11434-008-0484-1  

    ISSN:1001-6538

  328. S wave tomography of the crust and uppermost mantle in China 査読有り

    Youshun Sun, M. Nafi Tokoz, Shunping Pei, Dapeng Zhao, F. Dale Morgan, Anca Rosca

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 113 (B11) B11307 2008年11月

    DOI: 10.1029/2008JB005836  

    ISSN:2169-9313

    eISSN:2169-9356

  329. Seismic imaging of southwest Japan using P and PmP data: Implications for arc magmatism and seismotectonics 査読有り

    Anhui Sun, Dapeng Zhao, Michiharu Ikeda, Yong Chen, Qifu Chen

    GONDWANA RESEARCH 14 (3) 535-542 2008年10月

    DOI: 10.1016/j.gr.2008.04.004  

    ISSN:1342-937X

  330. Crystallographic preferred orientation of akimotoite and seismic anisotropy of Tonga slab 査読有り

    Rei Shiraishi, Eiji Ohtani, Kyuichi Kanagawa, Akira Shimojuku, Dapeng Zhao

    NATURE 455 (7213) 657-660 2008年10月

    DOI: 10.1038/nature07301  

    ISSN:0028-0836

    eISSN:1476-4687

  331. P-wave anisotropic tomography beneath Northeast Japan 査読有り

    Jian Wang, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 170 (1-2) 115-133 2008年9月

    DOI: 10.1016/j.pepi.2008.07.042  

    ISSN:0031-9201

    eISSN:1872-7395

  332. The Grenvillian and Pan-African orogens: World’s largest orogenies through geological time, and their implications on the origin of superplume 査読有り

    Rino, S, Y. Kon, W. Sato, S. Maruyama, M. Santosh, D. Zhao

    Gondwana Research 14 (1-2) 51-72 2008年8月

    DOI: 10.1016/j.gr.2008.01.001  

    ISSN:1342-937X

  333. Seismic evidence for a metastable olivine wedge in the subducting Pacific slab under Japan Sea 査読有り

    Guoming Jiang, Dapeng Zhao, Guibin Zhang

    EARTH AND PLANETARY SCIENCE LETTERS 270 (3-4) 300-307 2008年6月

    DOI: 10.1016/j.epsl.2008.03.037  

    ISSN:0012-821X

  334. Three-dimensional P- and S-wave velocity structures beneath Japan 査読有り

    Masaki Nakamura, Yasuhiro Yoshida, Dapeng Zhao, Hiroyuki Takayama, Koichiro Obana, Hiroshi Katao, Junzo Kasahara, Toshihiko Kanazawa, Shuichi Kodaira, Toshinori Sato, Hajime Shiobara, Masanao Shinohara, Hideki Shimamura, Narumi Takahashi, Ayako Nakanishi, Ryota Hino, Yoshio Murai, Kimihiro Mochizuki

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 168 (1-2) 49-70 2008年5月

    DOI: 10.1016/j.pepi.2008.04.017  

    ISSN:0031-9201

    eISSN:1872-7395

  335. Tomographic evidence for the subducting oceanic crust and forearc mantle serpentinization under Kyushu, Japan 査読有り

    Shaohong Xia, Dapeng Zhao, Xuelin Qiu

    TECTONOPHYSICS 449 (1-4) 85-96 2008年3月

    DOI: 10.1016/j.tecto.2007.12.007  

    ISSN:0040-1951

    eISSN:1879-3266

  336. 地震波でみた東北日本沈み込み帯の水循環-スラブから島弧地殻への水の供給- 査読有り

    長谷川 昭, 中島淳一, 北佐枝子, 辻優介, 新居恭平, 岡田知己, 松澤暢, 趙大鵬

    地学雑誌 117 (1) 59-75 2008年2月

    出版者・発行元: 公益社団法人 東京地学協会

    DOI: 10.5026/jgeography.117.59  

    ISSN:0022-135X

    詳細を見る 詳細を閉じる

    &emsp;Transportation of H2O from the slab to the arc crust by way of the mantle wedge is discussed based on seismic observations in the northeastern Japan subduction zone. A belt of intraslab seismicity, perhaps caused by dehydration of eclogite-forming phase transformations, has been found in the Pacific slab crust at depths of 70-90 km parallel to iso-depth contours of the plate interface, showing the major locations of slab dehydration. H2O thus released from the slab may be hosted by serpentine and chlorite just above the slab and is dragged downward. DD seismic tomography detected this layer of serpentine and chlorite as a thin S-wave low-velocity layer. Serpentine and chlorite thus brought down to a depth of 150-200 km should decompose there. H2O released by this dehydration decomposition is then transported upward and encounters the upwelling flow directly above, which perhaps causes partial melting of materials within the upwelling flow. Seismic tomography studies have clearly imaged this upwelling flow as an inclined sheet-like seismic low-velocity zone at depths of 30-150 km in the mantle wedge subparallel to the subducted slab. This upwelling flow finally meets the Moho below the volcanic front, and melts thus transported perhaps stagnate directly below the Moho. Some of them further migrate into the crust, and are also imaged by seismic tomography as low velocity areas. Their upward migration and repeated discharge to the surface form the volcanic front. Seismic tomography study of the mantle wedge further revealed along-arc variations of the inclined low-velocity zone: very low velocity areas appear periodically every &sim;80 km along the strike of the arc in the backarc region of northeastern Japan above which clustering of Quaternary volcanoes and topography highs are located, suggesting that melts could segregate from these very low velocity areas in the upwelling flow and rise vertically to form volcanoes at the surface in the backarc region.

  337. The 2007 Niigata earthquake: Effect of arc magma and fluids 査読有り

    Shaohong Xia, Dapeng Zhao, Xuelin Qiu

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 166 (3-4) 153-166 2008年2月

    DOI: 10.1016/j.pepi.2007.12.001  

    ISSN:0031-9201

  338. New insight into the crust and upper mantle structure under Alaska 査読有り

    Cheng Qi, Dapeng Zhao, Yong Chen, Natalia A. Ruppert

    Polar Science 1 (2-4) 85-100 2007年12月

    DOI: 10.1016/j.polar.2007.07.001  

    ISSN:1873-9652

  339. Deep structure beneath the west margin of Philippine Sea plate and South China Sea from P and S wave travel time tomography 査読有り

    Qu Chen, Zhou Hui-Lan, Zhao Da-Peng

    CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 50 (6) 1757-1768 2007年11月

    ISSN:0001-5733

  340. Seismic images under 60 hotspots: Search for mantle plumes 査読有り

    Dapeng Zhao

    GONDWANA RESEARCH 12 (4) 335-355 2007年11月

    DOI: 10.1016/j.gr.2007.03.001  

    ISSN:1342-937X

  341. Deep structure of southern California 査読有り

    You Tian, Dapeng Zhao, Jiwen Teng

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 165 (1-2) 93-113 2007年11月

    DOI: 10.1016/j.pepi.2007.08.003  

    ISSN:0031-9201

  342. Seismological constraints on the ultralow velocity zones in the lowermost mantle from core-reflected waves 査読有り

    Koki Idehara, Akira Yamada, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 165 (1-2) 25-46 2007年11月

    DOI: 10.1016/j.pepi.2007.07.005  

    ISSN:0031-9201

    eISSN:1872-7395

  343. Search for deep slab segments under Alaska 査読有り

    Cheng Qi, Dapeng Zhao, Yong Chen

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 165 (1-2) 68-82 2007年11月

    DOI: 10.1016/j.pepi.2007.08.004  

    ISSN:0031-9201

  344. Strong temperature dependence of the first pressure derivative of isothermal bulk modulus at zero pressure 査読有り

    Yigang Zhang, Dapeng Zhao, Masanori Matsui, Guangjun Guo

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 112 (B11) doi:10.1029/2006JB004865 2007年11月

    DOI: 10.1029/2006JB004865  

    ISSN:0148-0227

  345. The 1992 Landers earthquake: Effect of crustal heterogeneity on earthquake generation 査読有り

    Tian, Y, D. Zhao, R. Sun, J. Teng

    Chinese J. Geophys 50 1488-1496 2007年11月

  346. Teleseismic P-wave tomography evidence for the Indian lithospheric mantle subducting northward beneath the Qiangtang terrane 査読有り

    Zheng, H, T. Li, R. Gao, D. Zhao, R. He

    Chinese J. Geophys. 50 (5) 1418-1426 2007年11月

  347. Mapping the 660 km discontinuity under Japan Islands using mantle reflected waves 査読有り

    Yamada, A, D. Zhao

    Earth Sci. Frontiers 14 (3) 47-56 2007年8月

  348. Tomographic imaging outside a seismic network: Application to the northeast Japan arc 査読有り

    Dapeng Zhao, Zhi Wang, N. Umino, A. Hasegawa

    BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 97 (4) 1121-1132 2007年8月

    DOI: 10.1785/0120050256  

    ISSN:0037-1106

  349. Mantle plume tomography 査読有り

    Guust Nolet, Richard Allen, Dapeng Zhao

    CHEMICAL GEOLOGY 241 (3-4) 248-263 2007年7月

    DOI: 10.1016/j.chemgeo.2007.01.022  

    ISSN:0009-2541

    eISSN:1878-5999

  350. Teleseismic P-wave tomography and the upper mantle structure of the central Tien Shan orogenic belt 査読有り

    Jianshe Lei, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 162 (3-4) 165-185 2007年7月

    DOI: 10.1016/j.pepi.2007.04.010  

    ISSN:0031-9201

  351. Deep structure of the Japan subduction zone 査読有り

    Mohamed F. Abdelwahed, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 162 (1-2) 32-52 2007年6月

    DOI: 10.1016/j.pepi.2007.03.001  

    ISSN:0031-9201

  352. Teleseismic evidence for a break-off subducting slab under Eastern Turkey 査読有り

    Jianshe Lei, Dapeng Zhao

    EARTH AND PLANETARY SCIENCE LETTERS 257 (1-2) 14-28 2007年5月

    DOI: 10.1016/j.epsl.2007.02.011  

    ISSN:0012-821X

  353. Mapping the crustal structure under active volcanoes in central Tohoku, Japan using P and PmP data 査読有り

    Shaohong Xia, Dapeng Zhao, Xuelin Qiu, J. Nakajima, T. Matsuzawa, A. Hasegawa

    GEOPHYSICAL RESEARCH LETTERS 34 (10) doi:10.1029/2007GL030026 2007年5月

    DOI: 10.1029/2007GL030026  

    ISSN:0094-8276

  354. Superplume, supercontinent, and post-perovskite: Mantle dynamics and anti-plate tectonics on the Core-Mantle Boundary 査読有り

    S. Maruyama, M. Santosh, D. Zhao

    GONDWANA RESEARCH 11 (1-2) 7-37 2007年1月

    DOI: 10.1016/j.gr.2006.06.003  

    ISSN:1342-937X

  355. Mantle dynamics of Western Pacific and East Asia: Insight from seismic tomography and mineral physics 査読有り

    Dapeng Zhao, Shigenori Maruyama, Soichi Omori

    GONDWANA RESEARCH 11 (1-2) 120-131 2007年1月

    DOI: 10.1016/j.gr.2006.06.006  

    ISSN:1342-937X

  356. Seismic tomography of the crust and upper mantle structure underneath the Chinese Tianshan 査読有り

    Guo Biao, Liu Qi-Yuan, Chen Jiu-Hui, Zhao Da-Peng, Li Shun-Cheng, Lai Yuan-Gen

    CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 49 (6) 1693-1700 2006年11月

    ISSN:0001-5733

  357. Structural heterogeneity and its implications for the low frequency tremors in Southwest Japan 査読有り

    Zhi Wang, Dapeng Zhao, O. P. Mishra, Akira Yamada

    EARTH AND PLANETARY SCIENCE LETTERS 251 (1-2) 66-78 2006年11月

    DOI: 10.1016/j.epsl.2006.08.025  

    ISSN:0012-821X

  358. High-resolution mantle tomography of China and surrounding regions 査読有り

    Jinli Huang, Dapeng Zhao

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 111 (B9) B09305 2006年9月

    DOI: 10.1029/2005JB004066  

    ISSN:0148-0227

  359. Tomographic evidence for the Eurasian lithosphere subducting beneath south Taiwan 査読有り

    Zhi Wang, Dapeng Zhao, Jian Wang, Honn Kao

    GEOPHYSICAL RESEARCH LETTERS 33 (18) L18306 2006年9月

    DOI: 10.1029/2006GL027166  

    ISSN:0094-8276

    eISSN:1944-8007

  360. Vp and Vs tomography of Kyushu, Japan: New insight into arc magmatism and forearc seismotectonics 査読有り

    Zhi Wang, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 157 (3-4) 269-285 2006年8月

    DOI: 10.1016/j.pepi.2006.04.008  

    ISSN:0031-9201

  361. Teleseismic P-wave tomography of lithospheric mantle beneath west Kunlun orogenic belts 査読有り

    RZ He, DP Zhao, R Gao, BS Wang, C Qi

    CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 49 (3) 778-787 2006年5月

    ISSN:0001-5733

  362. 3-D P and S wave velocity structures and their relationship to strong earthquakes in the Chinese capital region 査読有り

    C Qi, DP Zhao, Y Chen, QF Chen, BS Wang

    CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 49 (3) 805-815 2006年5月

    ISSN:0001-5733

  363. Seismic evidence for the influence of fluids on the 2005 west off Fukuoka prefecture earthquake in southwest Japan 査読有り

    Zhi Wang, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 155 (3-4) 313-324 2006年5月

    DOI: 10.1016/j.pepi.2006.01.006  

    ISSN:0031-9201

    eISSN:1872-7395

  364. The Taiwan-Ryukyu subduction-collision complex: Folding of a viscoelastic slab and the double seismic zone 査読有り

    HC Chou, BY Kuo, SH Hung, LY Chiao, DP Zhao, YM Wu

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 111 (B4) B04410 2006年4月

    DOI: 10.1029/2005JB003822  

    ISSN:0148-0227

  365. Seismic images of the source area of the 2004 Mid-Niigata prefecture earthquake in Northeast Japan 査読有り

    Z Wang, DP Zhao

    EARTH AND PLANETARY SCIENCE LETTERS 244 (1-2) 16-31 2006年4月

    DOI: 10.1016/j.epsl.2006.02.015  

    ISSN:0012-821X

  366. Equations of state of CaSiO3 Perovskite: a molecular dynamics study 査読有り

    YG Zhang, DP Zhao, M Matsui, GJ Guo

    PHYSICS AND CHEMISTRY OF MINERALS 33 (2) 126-137 2006年4月

    DOI: 10.1007/s00269-006-0060-7  

    ISSN:0342-1791

  367. 3-D Seismic structure of the source area of the 1993 Latur, India, earthquake and its implications for rupture nucleations 査読有り

    S Mukhopadhyay, OP Mishra, D Zhao, Kayal, JR

    TECTONOPHYSICS 415 (1-4) 1-16 2006年3月

    DOI: 10.1016/j.tecto.2005.10.041  

    ISSN:0040-1951

    eISSN:1879-3266

  368. Deep structure and origin of the Baikal rift zone 査読有り

    DP Zhao, JS Lei, T Inoue, A Yamada, SS Gao

    EARTH AND PLANETARY SCIENCE LETTERS 243 (3-4) 681-691 2006年3月

    DOI: 10.1016/j.epsl.2006.01.033  

    ISSN:0012-821X

  369. Crustal structure, fault segmentation, and activity of the Median Tectonic Line in Shikoku, Japan 査読有り

    M Ikeda, DP Zhao, Y Ohno

    TECTONOPHYSICS 412 (1-2) 49-60 2006年1月

    DOI: 10.1016/j.tecto.2005.10.001  

    ISSN:0040-1951

  370. A new insight into the Hawaiian plume 査読有り

    JS Lei, DP Zhao

    EARTH AND PLANETARY SCIENCE LETTERS 241 (3-4) 438-453 2006年1月

    DOI: 10.1016/j.epsl.2005.11.038  

    ISSN:0012-821X

  371. Global P-wave tomography: On the effect of various mantle and core phases 査読有り

    JS Lei, DP Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 154 (1) 44-69 2006年1月

    DOI: 10.1016/j.pepi.2005.09.001  

    ISSN:0031-9201

  372. Towards mapping the three-dimensional distribution of water in the transition zone from P-velocity tomography and 660-km discontinuity depths 査読有り

    Daisuke Suetsugu, Toru Inoue, Akira Yamada, Dapeng Zhao, Masayuki Obayashi

    Geophysical Monograph Series 168 237-249 2006年

    出版者・発行元: Blackwell Publishing Ltd

    DOI: 10.1029/167GM18  

    ISSN:2328-8779 0065-8448

  373. Suboceanic earthquake location and seismic structure in the Kanto district, central Japan 査読有り

    Z Wang, DP Zhao

    EARTH AND PLANETARY SCIENCE LETTERS 241 (3-4) 789-803 2006年1月

    DOI: 10.1016/j.epsl.2005.11.015  

    ISSN:0012-821X

  374. Precisely measured travel times of mantle body waves: implications for mantle heterogeneity and tomography 査読有り

    Zhao, D, A. Yamada, Y. Ohta

    Earth Science Frontiers 13 37-47 2006年

  375. Seismic imaging of the entire arc of Tohoku and Hokkaido in Japan using P-wave, S-wave and sP depth-phase data 査読有り

    Z Wang, DP Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 152 (3) 144-162 2005年9月

    DOI: 10.1016/j.pepi.2005.06.010  

    ISSN:0031-9201

  376. Anisotropy of akimotoite: A molecular dynamics study 査読有り

    YG Zhang, DP Zhao, M Matsui

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 151 (3-4) 309-319 2005年8月

    DOI: 10.1016/j.pepi.2005.04.003  

    ISSN:0031-9201

    eISSN:1872-7395

  377. Local earthquake reflection tomography of the Landers aftershock area 査読有り

    DP Zhao, S Todo, JS Lei

    EARTH AND PLANETARY SCIENCE LETTERS 235 (3-4) 623-631 2005年7月

    DOI: 10.1016/j.epsl.2005.04.039  

    ISSN:0012-821X

  378. The crust and upper mantle discontinuity structure beneath Alaska inferred from receiver functions 査読有り

    YH Ai, DP Zhao, Gao, X, WW Xu

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 150 (4) 339-350 2005年6月

    DOI: 10.1016/j.pepi.2004.12.002  

    ISSN:0031-9201

  379. P-wave tomography and origin of the Changbai intraplate volcano in Northeast Asia 査読有り

    JS Lei, DP Zhao

    TECTONOPHYSICS 397 (3-4) 281-295 2005年3月

    DOI: 10.1016/j.tecto.2004.12.009  

    ISSN:0040-1951

  380. Waveform modelling of local earthquakes in southwest Japan 査読有り

    MF Abdelwahed, DP Zhao

    EARTH PLANETS AND SPACE 57 (11) 1039-1054 2005年

    DOI: 10.1186/BF03351883  

    ISSN:1343-8832

  381. Crustal heterogeneity beneath southwest Japan estimated from direct and Moho-reflected waves 査読有り

    MK Salah, DP Zhao, JS Lei, MF Abdelwahed

    TECTONOPHYSICS 395 (1-2) 1-17 2005年1月

    DOI: 10.1016/j.tecto.2004.08.005  

    ISSN:0040-1951

  382. Modeling long-term volcanic hazards through Bayesian inference: An example from the Tohoku volcanic arc, Japan 査読有り

    AJ Martin, K Umeda, CB Connor, JN Weller, DP Zhao, M Takahashi

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 109 (B10) doi:10.1029/2004JB003201 2004年10月

    DOI: 10.1029/2004JB003201  

    ISSN:2169-9313

    eISSN:2169-9356

  383. Global tomographic images of mantle plumes and subducting slabs: insight into deep Earth dynamics 査読有り

    DP Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 146 (1-2) 3-34 2004年8月

    DOI: 10.1016/j.pepi.2003.07.032  

    ISSN:0031-9201

  384. Crustal heterogeneity and seismotectonics of the region around Beijing, China 査読有り

    JL Huang, DP Zhao

    TECTONOPHYSICS 385 (1-4) 159-180 2004年7月

    DOI: 10.1016/j.tecto.2004.04.024  

    ISSN:0040-1951

  385. Origin of the Changbai intraplate volcanism in Northeast China: Evidence from seismic tomography 査読有り

    DP Zhao, JS Lei, RY Tang

    CHINESE SCIENCE BULLETIN 49 (13) 1401-1408 2004年7月

    DOI: 10.1360/04wd0125  

    ISSN:1001-6538

  386. Crustal heterogeneity in the 2000 western Tottori earthquake region: effect of fluids from slab dehydration 査読有り

    DP Zhao, H Tani, OP Mishra

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 145 (1-4) 161-177 2004年7月

    DOI: 10.1016/j.pepi.2004.03.009  

    ISSN:0031-9201

  387. Seismic evidence for dehydration embrittlement of the subducting Pacific slab 査読有り

    OP Mishra, DP Zhao

    GEOPHYSICAL RESEARCH LETTERS 31 (9) doi:10.1029/2004GL019489 2004年5月

    DOI: 10.1029/2004GL019489  

    ISSN:0094-8276

    eISSN:1944-8007

  388. Rayleigh-wave group velocity distribution in the Antarctic region 査読有り

    R Kobayashi, DP Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 141 (3) 167-181 2004年3月

    DOI: 10.1016/j.pepi.2003.11.011  

    ISSN:0031-9201

    eISSN:1872-7395

  389. Seismic ray path variations in a 3D global velocity model 査読有り

    Dapeng Zhao, Jianshe Lei

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 141 (3) 153-166 2004年3月

    DOI: 10.1016/j.pepi.2003.11.010  

    ISSN:0031-9201

  390. Mapping the crustal thickness in southwest Japan using Moho-reflected waves 査読有り

    Mohamed K. Salah, Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 141 (2) 79-94 2004年2月

    DOI: 10.1016/j.pepi.2003.10.002  

    ISSN:0031-9201

  391. Tomography of northeast Japan forearc and its implications for interplate seismic coupling 査読有り

    OP Mishra, DP Zhao, N Umino, A Hasegawa

    GEOPHYSICAL RESEARCH LETTERS 30 (16) doi:10.1029/2003GL017736 2003年8月

    DOI: 10.1029/2003GL017736  

    ISSN:0094-8276

  392. Crack density, saturation rate and porosity at the 2001 Bhuj, India, earthquake hypocenter: a fluid-driven earthquake? 査読有り

    OP Mishra, Dapeng Zhao

    EARTH AND PLANETARY SCIENCE LETTERS 212 (3-4) 393-405 2003年7月

    DOI: 10.1016/S0012-821X(03)00285-1  

    ISSN:0012-821X

  393. Three-dimensional P- and S-wave velocity structures beneath the Ryukyu arc 査読有り

    M Nakamura, Y Yoshida, DP Zhao, H Katao, S Nishimura

    TECTONOPHYSICS 369 (3-4) 121-143 2003年7月

    DOI: 10.1016/S0040-1951(03)00172-0  

    ISSN:0040-1951

  394. Seismic tomography from local crustal earthquakes beneath eastern Rif Mountains of Morocco 査読有り

    Serrano, I, DP Zhao, J Morales, F Torcal

    TECTONOPHYSICS 367 (3-4) 187-201 2003年6月

    DOI: 10.1016/S0040-1951(03)00100-8  

    ISSN:0040-1951

  395. 3-D seismic structure of Kii Peninsula in southwest Japan: evidence for slab dehydration in the forearc 査読有り

    Mohamed K. Salah, Dapeng Zhao

    TECTONOPHYSICS 364 (3-4) 191-213 2003年4月

    DOI: 10.1016/S0040-1951(03)00059-3  

    ISSN:0040-1951

  396. P-wave tomography of crust and upper mantle under Southern California: Influence of topography of Moho discontinuity 査読有り

    Jinli Huang, Dapeng Zhao

    Chinese Journal of Seismology 25 563-573 2003年

  397. Three-dimensional attenuation structure of Southwest Japan estimated from spectra of microearthquakes 査読有り

    Mohamed K. Salah, Dapeng Zhao

    Phys. Earth Planet. Inter. 136 215-231 2003年

    DOI: 10.1016/S0031-9201(03)00049-9  

  398. The 2001 Bhuj earthquake: Tomographic evidence for fluids at the hypocenter and its implications for rupture nucleation 査読有り

    Kayal, JR, DP Zhao, OP Mishra, R De, OP Singh

    GEOPHYSICAL RESEARCH LETTERS 29 (24) 10.1029/ 2002GL015177 2002年12月

    DOI: 10.1029/2002GL015177  

    ISSN:0094-8276

    eISSN:1944-8007

  399. 3-D velocity structure of P-wave in the crust and upper-mantle beneath Pamir and adjacent region 査読有り

    Jianshe Lei, Huilan Zhou, Dapeng Zhao

    CHINESE JOURNAL OF GEOPHYSICS 45 (6) 802-+ 2002年11月

    ISSN:0001-5733

  400. Lithospheric structure and its relationship to seismic and volcanic activity in southwest China 査読有り

    JL Huang, DP Zhao, SH Zheng

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 107 (B10) 10.1029/2000JB000137 2002年10月

    DOI: 10.1029/2000JB000137  

    ISSN:2169-9313

    eISSN:2169-9356

  401. Influence of fluids and magma on earthquakes: seismological evidence 査読有り

    DP Zhao, OP Mishra, R Sanda

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 132 (4) 249-267 2002年10月

    DOI: 10.1016/S0031-9201(02)00082-1  

    ISSN:0031-9201

  402. Geophysical signatures of a basic-body rock placed in the upper crust of the External Zones of the Betic Cordillera (Southern Spain) 査読有り

    Serrano, I, F Bohoyo, J Galindo-Zaldivar, J Morales, DP Zhao

    GEOPHYSICAL RESEARCH LETTERS 29 (11) 2002年6月

    DOI: 10.1029/2001GL013487  

    ISSN:0094-8276

  403. Hot fingers in the mantle wedge: new insights into magma genesis in subduction zones 査読有り

    Y Tamura, Y Tatsumi, DP Zhao, Y Kido, H Shukuno

    EARTH AND PLANETARY SCIENCE LETTERS 197 (1-2) 105-116 2002年3月

    DOI: 10.1016/S0012-821X(02)00465-X  

    ISSN:0012-821X

  404. 3-D crustal structure of the extensional Granada Basin in the convergent boundary between the Eurasian and African plates 査読有り

    Serrano, I, DP Zhao, J Morales

    TECTONOPHYSICS 344 (1-2) 61-79 2002年1月

    DOI: 10.1016/S0040-1951(01)00201-3  

    ISSN:0040-1951

  405. Seismological structure of subduction zones and its implications for arc magmatism and dynamics 査読有り

    Dapeng Zhao

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 127 (1-4) 197-214 2001年12月

    DOI: 10.1016/S0031-9201(01)00228-X  

    ISSN:0031-9201

  406. Seismic imaging of arc magma and fluids under the central part of northeastern Japan 査読有り

    J Nakajima, T Matsuzawa, A Hasegawa, DP Zhao

    TECTONOPHYSICS 341 (1-4) 1-17 2001年11月

    DOI: 10.1016/S0040-1951(01)00181-0  

    ISSN:0040-1951

  407. Three-dimensional structure of Vp, Vs and Vp/Vs beneath northeastern Japan: Implications for arc magmatism and fluids 査読有り

    Junichi Nakajima, Toru Matsuzawa, Akira Hasegawa, Dapeng Zhao

    Journal of Geophysical Research 106 21843-21857 2001年10月

  408. Seismic structure and origin of hotspots and mantle plumes 査読有り

    Dapeng Zhao

    EARTH AND PLANETARY SCIENCE LETTERS 192 (3) 251-265 2001年10月

    DOI: 10.1016/S0012-821X(01)00465-4  

    ISSN:0012-821X

  409. New advances of seismic tomography and its applications to subduction zones and earthquake fault zones: A review 査読有り

    Dapeng Zhao

    ISLAND ARC 10 (1) 68-84 2001年3月

    DOI: 10.1046/j.1440-1738.2001.00291.x  

    ISSN:1038-4871

  410. Dehydration of serpentinized slab mantle: Seismic evidence from southwest Japan 査読有り

    T Seno, DP Zhao, Y Kobayashi, M Nakamura

    EARTH PLANETS AND SPACE 53 (9) 861-871 2001年

    DOI: 10.1186/BF03351683  

    ISSN:1343-8832

  411. Tomographic image of low P velocity anomalies above slab in northern Cascadia subduction zone 査読有り

    DP Zhao, KL Wang, GC Rogers, SM Peacock

    EARTH PLANETS AND SPACE 53 (4) 285-293 2001年

    DOI: 10.1186/BF03352385  

    ISSN:1343-8832

  412. Impact of seismic tomography on earth sciences 査読有り

    DP Zhao, Kayal, JR

    CURRENT SCIENCE 79 (9) 1208-1214 2000年11月

    ISSN:0011-3891

  413. 日本列島下のH_2Oの輸送と溶融

    岩森 光, 趙 大鵬

    地學雜誌 109 (4) 614-626 2000年8月25日

    出版者・発行元: Tokyo Geographical Society

    DOI: 10.5026/jgeography.109.4_614  

    ISSN:0022-135X

    詳細を見る 詳細を閉じる

    Material recycling in subduction zones, including generation and migration of aqueousfluids and melts, is key to understanding the origin of volcanism in subduction zones. It isalso important for understanding the global mass budget, such as formation and growth ofthe continents. Recent knowledge concerning the phase relationships of hydrous peridotiticand basaltic systems allows us to model fluid generation and migration in subduction zones.Here we present (1) numerical models for the transportation of H2O and melting beneath theJapanese islands, in which generation and migration of aqueous fluid, its interaction with theconvecting solid, and melting are considered, based on the phase relationships, (2) predictionsof the corresponding seismic structures based on the calculated distribution of the fluids (aqueous fluids and melts), (3) 3-D seismic tomographic images beneath the islands, (4) analyses on distribution of the volcanoes and the volcanic chains, and (5) comparisonsbetween the model predictions and the observations.<BR>The model calculation suggests that in northeast Japan, nearly all the H2O expelled fromthe subducted Pacific plate is hosted by serpentine and chlorite just above the plate, and isbrought down to 150-200km. Breakdown of serpentine and chlorite at these depths results inthe formation of a fluid column through which H2O is transported upwards, and results inthe initiation of melting in the mantle wedge beneath the backarc. The seismic tomographicstudies suggest the existence of such a melting region beneath the backarc. In central Japan, the subducted Philippine Sea plate overlaps the subducted Pacific plate. This geometry causesslow thermal recovery of the subducted Pacific plate, resulting in dehydration reactions atlevels (200-300km) deeper than in northeast Japan, and bending of the volcanic chaintowards the backarc side. In contrast, in southwest Japan, where a relatively hot part of thePhilippine Sea plate (Shikoku Basin) subducts, the dehydration reactions are predicted tooccur at relatively shallow levels (100km depth). The seismic tomographic image supportswell the predicted distribution of the fluids beneath the volcanic front to the forearc region.These comparisons between the model predictions and the observations suggest that th ethermal structure (or age) of the subducting plate strongly controls the distribution of the aqueous fluids and melts in subduction zones through the position of the dehydration reactions.

  414. Seismic structure and magmatism of the young Kyushu subduction zone 査読有り

    DP Zhao, K Asamori, H Iwamori

    GEOPHYSICAL RESEARCH LETTERS 27 (14) 2057-2060 2000年7月

    DOI: 10.1029/2000GL011512  

    ISSN:0094-8276

  415. Evidence for the location and cause of large crustal earthquakes in Japan 査読有り

    DP Zhao, F Ochi, A Hasegawa, A Yamamoto

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 105 (B6) 13579-13594 2000年6月

    DOI: 10.1029/2000JB900026  

    ISSN:2169-9313

    eISSN:2169-9356

  416. Seismic activity and deformation process of the overriding plate in the northeastern Japan subduction zone

    Akira Hasegawa, Akira Yamamoto, Norihito Umino, Satoshi Miura, Shigeki Horiuchi, Dapeng Zhao, Hiroki Sato

    Tectonophysics 319 (4) 225-239 2000年4月20日

    DOI: 10.1016/S0040-1951(99)00296-6  

    ISSN:0040-1951

  417. An empirical relationship between seismic attenuation and velocity anomalies in the upper mantle 査読有り

    EG Roth, DA Wiens, DP Zhao

    GEOPHYSICAL RESEARCH LETTERS 27 (5) 601-604 2000年3月

    ISSN:0094-8276

  418. Melting and seismic structure beneath the northeast Japan arc 査読有り

    H Iwamori, DP Zhao

    GEOPHYSICAL RESEARCH LETTERS 27 (3) 425-428 2000年2月

    ISSN:0094-8276

  419. Crack density and saturation rate in the 1995 Kobe earthquake region 査読有り

    DP Zhao, T Mizuno

    GEOPHYSICAL RESEARCH LETTERS 26 (21) 3213-3216 1999年11月

    DOI: 10.1029/1999GL005411  

    ISSN:0094-8276

  420. Active continental subduction beneath the Betic Cordillera and the Alboran Sea 査読有り

    J Morales, Serrano, I, A Jabaloy, J Galindo-Zaldivar, D Zhao, F Torcal, F Vidal, F Gonzalez-Lodeiro

    GEOLOGY 27 (8) 735-738 1999年8月

    DOI: 10.1130/0091-7613(1999)027<0735:ACSBTB>2.3.CO;2  

    ISSN:0091-7613

  421. Tomographic imaging of the P-wave velocity structure beneath the Kamchatka peninsula 査読有り

    A Gorbatov, J Dominguez, G Suarez, Kostoglodov, V, D Zhao, E Gordeev

    GEOPHYSICAL JOURNAL INTERNATIONAL 137 (2) 269-279 1999年5月

    DOI: 10.1046/j.1365-246X.1999.00801.x  

    ISSN:0956-540X

  422. P-wave tomographic images in the Central Betics-Alboran sea (South Spain) using local earthquakes: contribution for a continental collision 査読有り

    Serrano, I, J Morales, DP Zhao, F Torcal, F Vidal

    GEOPHYSICAL RESEARCH LETTERS 25 (21) 4031-4034 1998年11月

    DOI: 10.1029/1998GL900021  

    ISSN:0094-8276

  423. Three-dimensional seismic structure beneath Shillong Plateau and Assam Valley, Northeast India 査読有り

    Kayal, JR, DP Zhao

    BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 88 (3) 667-676 1998年6月

    ISSN:0037-1106

  424. The 1995 Kobe earthquake: Seismic image of the source zone and its implications for the rupture nucleation 査読有り

    DP Zhao, H Negishi

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 103 (B5) 9967-9986 1998年5月

    DOI: 10.1029/97JB03670  

    ISSN:2169-9313

    eISSN:2169-9356

  425. Tomographic imaging of deep-velocity structure beneath the Eastern and Southern Carpathians, Romania: Implications for continental collision 査読有り

    GW Fan, TC Wallace, DP Zhao

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 103 (B2) 2705-2723 1998年2月

    ISSN:2169-9313

    eISSN:2169-9356

  426. Depth extent of the Lau back-arc spreading center and its relation to subduction processes 査読有り

    DP Zhao, YB Xu, DA Wiens, L Dorman, J Hildebrand, S Webb

    SCIENCE 278 (5336) 254-257 1997年10月

    DOI: 10.1126/science.278.5336.254  

    ISSN:0036-8075

  427. Morphology of the subducting slab boundary in the northeastern Japan arc 査読有り

    DP Zhao, T Matsuzawa, A Hasegawa

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 102 (1-2) 89-104 1997年6月

    DOI: 10.1016/S0031-9201(96)03258-X  

    ISSN:0031-9201

  428. State of stress before and after the 1994 Northridge earthquake 査読有り

    DP Zhao, H Kanamori, D Wiens

    GEOPHYSICAL RESEARCH LETTERS 24 (5) 519-522 1997年3月

    DOI: 10.1029/97GL00258  

    ISSN:0094-8276

  429. Tomography of the source area of the 1995 Kobe earthquake: Evidence for fluids at the hypocenter? 査読有り

    Dapeng Zhao, Hiroo Kanamori, Hiroaki Negishi, Douglas Wiens

    Science 274 1891-1894 1996年12月

    DOI: 10.1126/science.274.5294.1891  

    ISSN:0036-8075

  430. Three-dimensional seismic velocity structure of the crust and uppermost mantle beneath Taiwan 査読有り

    KF Ma, JH Wang, Dapeng Zhao

    JOURNAL OF PHYSICS OF THE EARTH 44 85-105 1996年3月

    DOI: 10.4294/jpe1952.44.85  

    ISSN:0022-3743

  431. Simultaneous inversion of local and teleseismic data for the crust and mantle structure of southern California 査読有り

    DP Zhao, H Kanamori, E Humphreys

    PHYSICS OF THE EARTH AND PLANETARY INTERIORS 93 (3-4) 191-214 1996年2月

    DOI: 10.1016/0031-9201(95)03076-X  

    ISSN:0031-9201

  432. THE 1994 NORTHRIDGE EARTHQUAKE - 3-D CRUSTAL STRUCTURE IN THE RUPTURE ZONE AND ITS RELATION TO THE AFTERSHOCK LOCATIONS AND MECHANISMS 査読有り

    DP ZHAO, H KANAMORI

    GEOPHYSICAL RESEARCH LETTERS 22 (7) 763-766 1995年4月

    DOI: 10.1029/94GL03222  

    ISSN:0094-8276

  433. TOMOGRAPHIC IMAGING OF THE ALASKA SUBDUCTION ZONE 査読有り

    Dapeng Zhao, Douglas Christensen, Hans Pulpan

    JOURNAL OF GEOPHYSICAL RESEARCH 100 (B4) 6487-6504 1995年4月

    DOI: 10.1029/95JB00046  

    ISSN:2169-9313

    eISSN:2169-9356

  434. Deep structure of Japan subduction zone as derived from local, regional, and teleseismic events 査読有り

    Dapeng Zhao, Akira Hasegawa, Hiroo Kanamori

    JOURNAL OF GEOPHYSICAL RESEARCH 99 (B11) 22313-22329 1994年11月

    DOI: 10.1029/94JB01149  

    ISSN:2169-9313

    eISSN:2169-9356

  435. Teleseismic evidence for lateral heterogeneities in the northeastern Japan arc 査読有り

    Dapeng Zhao, Akira Hasegawa

    TECTONOPHYSICS 237 189-199 1994年10月

    DOI: 10.1016/0040-1951(94)90254-2  

    ISSN:0040-1951

  436. Deep structure of island arc magmatic regions as inferred from seismic observations 査読有り

    Akira Hasegawa, Dapeng Zhao

    Magmatic Systems(ed. M. P. Ryan) 179-195 1994年8月

  437. THE 1992 LANDERS EARTHQUAKE SEQUENCE - EARTHQUAKE OCCURRENCE AND STRUCTURAL HETEROGENEITIES 査読有り

    DP ZHAO, H KANAMORI

    GEOPHYSICAL RESEARCH LETTERS 20 (11) 1083-1086 1993年6月

    DOI: 10.1029/93GL01239  

    ISSN:0094-8276

  438. P-WAVE TOMOGRAPHIC IMAGING OF THE CRUST AND UPPER MANTLE BENEATH THE JAPAN ISLANDS 査読有り

    Dapeng Zhao, Akira Hasegawa

    JOURNAL OF GEOPHYSICAL RESEARCH 98 (B3) 4333-4353 1993年3月

    DOI: 10.1029/92JB02295  

    ISSN:0148-0227

  439. DEEP-STRUCTURE OF ARC VOLCANOS AS INFERRED FROM SEISMIC OBSERVATIONS 査読有り

    A HASEGAWA, A YAMAMOTO, D ZHAO, S HORI, S HORIUCHI

    PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON 342 (1663) 167-178 1993年1月

    ISSN:0962-8428

  440. Tomographic imaging of P and S wave velocity structure beneath northeastern Japan 査読有り

    Dapeng Zhao, Akira Hasegawa, Shigeki Horiuchi

    Journal of Geophysical Research 97 19909-19928 1992年12月

    DOI: 10.1029/92JB00603  

    ISSN:0148-0227

  441. P-WAVE IMAGE OF THE CRUST AND UPPERMOST MANTLE IN SOUTHERN CALIFORNIA 査読有り

    Dapeng Zhao, Hiroo Kanamori

    GEOPHYSICAL RESEARCH LETTERS 19 (23) 2329-2332 1992年12月

    ISSN:0094-8276

  442. SEISMIC VELOCITY STRUCTURE OF THE CRUST BENEATH THE JAPAN ISLANDS 査読有り

    D ZHAO, S HORIUCHI, A HASEGAWA

    TECTONOPHYSICS 212 289-301 1992年10月

    ISSN:0040-1951

  443. DEEP STRUCTURE OF THE NORTHEASTERN JAPAN ARC AND ITS RELATIONSHIP TO SEISMIC AND VOLCANIC ACTIVITY 査読有り

    A HASEGAWA, DP ZHAO, S HORI, A YAMAMOTO, S HORIUCHI

    Nature 352 683-689 1991年8月

    DOI: 10.1038/352683a0  

    ISSN:0028-0836

  444. 3-D seismic velocity structure of the crust and uppermost mantle in the northeastern Japan arc 査読有り

    Dapeng Zhao, Shigeki Horiuchi, Akira Hasegawa

    Tectonophysics 181 135-149 1990年9月

    DOI: 10.1016/0040-1951(90)90013-X  

    ISSN:0040-1951

  445. 磐梯山の山体を通過する地震波形記録から見た溶融体の規模について 査読有り

    堀内茂木, 植木貞人, 西澤あずさ, 趙大鵬, 日野亮太, 長谷川昭, 松澤暢, 河野俊夫, 仁田交市, 長谷見晶子, 佐藤魂夫, 伊東明彦

    地震2 43 379-387 1990年4月

    DOI: 10.4294/zisin1948.43.3_379  

︎全件表示 ︎最初の5件までを表示

MISC 7

  1. 月と火星の全球地震波伝播シミュレーション

    豊国 源知, 竹中 博士, 趙 大鵬, 石原 吉明

    SENAC : 東北大学大型計算機センター広報 46 (3) 1-12 2013年7月

    出版者・発行元: 東北大学サイバーサイエンスセンター

    ISSN: 0286-7419

  2. 巻頭言

    趙 大鵬

    遊・星・人 : 日本惑星科学会誌 21 (2) 93-93 2012年6月25日

    出版者・発行元: 日本惑星科学会

    ISSN: 0918-273X

  3. 月科学の最先端と今後の展望:月はどこまでわかったか?その2 地震波トモグラフィーからわかるProcellarum KREEP Terraneの深部構造

    趙大鵬, 荒井朋子

    日本惑星科学会誌 遊・星・人 20 (1) 2011年

    ISSN: 0918-273X

  4. 日本列島下の地殻内地震発生層の地域的変化

    越智 富美子, 趙 大鵬

    東京大學地震研究所彙報 76 (1) 145-153 2001年

    出版者・発行元: 東京大学

    ISSN: 0040-8972

    詳細を見る 詳細を閉じる

    To better understand the earthquake dynamics of the Japan subduction zone, we investigated the lateral variations of the seismogenic layer in the crust beneath the Japan Islands using about 30,000 well-located crustal earthquakes (M 1-5). These shallow events (0-20 km depths) were selected from the Japan University Network Earthquake Catalog (1985-1993) and the aftershocks of the 1995 Kobe earthquake (M 7.2). The hypocenters were relocated precisely using a 3-D ray tracing method [Zhao et al, 1992] and a 3-D velocity model [Ochi, Asamori and Zhao, 1999]. From the hypocentral distribution of these events we estimated the depth distributions of the upper and lower boundaries and the thickness of the seismogenic layer in Japan. Then we examined the relationships among the thickness of the seismogenic layer, active faults, volcanoes, tomography, and large crustal earthquakes (M>5.7) from 1885 to 1999. We obtained the following results. (1) There are large variations in depth range and thickness of the seismogenic layer. There is a trend that large crustal earthquakes occur in areas where the seismogenic layer changes abruptly. Those areas may represent weak sections of the crust and so are subject to tectonic stress and are prone to large earthquakes. (2) The upper and lower boundaries of the seismogenic layer become shallow toward volcanoes, indicating that the seismogenic layer is controlled by the geothermal regime. (3) The seismogenic layer exhibits large variations across and along the fault zones. (4) A correlation is visible between the thickness of the seismogenic layer and seismic tomography, suggesting that tomographic images of the crust contain the effects of lateral material heterogeneities, as well as thickness changes of the seismogenic layer. These results may improve our understanding of the earthquake dynamics and contribute to the assessment and the mitigation of seismic hazards of the Japan Islands.

  5. 中禅寺湖周辺域における地殻構造探査実験

    長谷川昭, 堀内茂木, 松澤暢, 西澤あずさ, 松本聡, 堀修一郎, 河野俊夫, 津村紀子, 海野徳仁, 山本明, 趙大鵬, 鈴木将之, 伊東明彦, 野 沢康宏, 鈴木貞臣, 岡山宗夫, 佐藤魂夫, 小菅正裕, 井上純, 長谷見晶子, 石井敬久, 小林哲夫, 緒方康浩

    東北地域災害科学研究 27 103-106 1991年4月

  6. エアガン・ランドエアガンを用いた磐梯山周辺域の地殻構造調査

    長谷川昭, 堀内茂木, 植木貞人, 西澤あずさ, 松澤暢, 海野徳仁, 堀修一郎, 河野俊夫, 仁田交市, 橋本恵一, 立花憲司, 稲盛隆穂, 松本 聡, 日野亮太, 趙大鵬, 梅津功, 佐藤吉之, 大久保正, 浜口博之, 高木章雄, 田中和夫, 佐藤魂夫, 小菅正裕, 井上純, 長谷見晶子, 鈴木将之, 伊東明彦, 末広 潔, 海宝由佳, 桜井浩哲

    東北地域災害科学研究 25 75-79 1989年4月

  7. 41B. エアガンによる磐梯山周辺域の地殻構造探査(日本火山学会1988年秋季大会)

    長谷川 昭, 堀内 茂木, 植木 貞人, 西澤 あずさ, 松澤 暢, 海野 徳仁, 堀 修一郎, 河野 俊夫, 仁田 交市, 稲盛 隆穂, 日野 亮太, 松本 聡, 梅津 功, 橋本 恵一, 立花 憲司, 趙 大鵬, 佐藤 吉之, 大久保 正, 浜口 博之, 高木 章雄, 佐藤 魂夫, 小菅 正裕, 井上 純, 田中 和夫, 長谷見 晶子, 鈴木 将之, 伊東 明彦, 末広 潔

    火山. 第2集 33 (4) 350-351 1988年12月28日

    出版者・発行元: 特定非営利活動法人日本火山学会

    ISSN: 0453-4360

︎全件表示 ︎最初の5件までを表示

書籍等出版物 6

  1. Mantle Convection and Surface Expressions

    Zhouchuan Huang, Dapeng Zhao

    American Geophysical Union 2021年7月

  2. Plate Boundaries and Natural Hazards

    Jianshe Lei, Dapeng Zhao

    American Geophysical Union 2016年8月

  3. Multiscale Seismic Tomography

    Dapeng Zhao

    Springer 2015年3月

    ISBN: 9784431553601

  4. Topics in Igneous Petrology

    Dapeng Zhao, S. Ueki, Y. Nishizono, A. Yamada

    Springer 2011年5月

  5. Superplumes

    Dapeng Zhao

    Springer 2007年8月

  6. Magmatic Systems

    Akira Hasegawa, Dapeng Zhao

    Academic Press 1994年8月

︎全件表示 ︎最初の5件までを表示

講演・口頭発表等 169

  1. P波方位異方性媒質における3次元波線追跡と日本沈み込み帯のトモグラフィーへの影響

    綱嶋椋, 趙大鵬, 豊国源知

    日本地球惑星科学連合2025年大会 2025年5月30日

  2. Origin of intraplate volcanism and big mantle wedge beneath western Alaska and the Bering Sea

    趙大鵬, Xuran Liang, Yuanyuan Hua, Yigang Xu

    日本地球惑星科学連合2025年大会 2025年5月26日

  3. 東日本沈み込み帯の方位異方性トモグラフィー: 3次元波線追跡法の影響

    綱嶋椋, 趙大鵬, 豊国源知

    2024年10月22日

  4. ジャワ沈み込み帯の深部構造と地震火山活動:日本との比較

    趙大鵬, Fan Xie, Zewei Wang

    日本地震学会秋季大会 2024年10月21日

  5. Subslab hot upwelling, slab window and Toba volcano super-eruption

    趙 大鵬, Hu Hao

    日本地球惑星科学連合2024年大会 2024年5月30日

  6. スラブ残骸からの流体と2013年北米上部マントル地震

    趙 大鵬, Liang Xuran, 豊国 源知, Hua Yuanyuan, Xu Yigang

    日本地球惑星科学連合2024年大会 2024年5月29日

  7. P波方位異方性モデルにおける3次元波線追跡

    綱嶋 椋, 趙 大鵬, 豊国 源知

    日本地球惑星科学連合2024年大会 2024年5月28日

  8. 2024年 M7.6能登半島地震震源域の3次元構造探査: 流体の地震発生への影響について

    鈴木 基矢, 趙 大鵬, 豊国 源知

    日本地球惑星科学連合2024年大会 2024年5月28日

  9. Seismic structure and anisotropy of Tohoku forearc: new insight into seismotectonics and subduction dynamics

    趙大鵬, 豊国源知, Wang Zewei

    American Geophysical Union 2023 Fall Meeting 2023年12月15日

  10. S-net・Hi-netの近地・遠地地震データによる日本列島下の3次元P波・S波速度トモグラフィー

    鈴木 基矢, 趙 大鵬, 豊国 源知

    日本地震学会2023 年度秋季大会 2023年10月31日

  11. 地震波トモグラフィーから見た地震火山活動と地球内部 ダイナミクス 招待有り

    趙 大鵬

    日本地震学会2023 年度秋季大会 2023年10月31日

  12. Whole-mantle P-wave tomography beneath Japan and surrounding regions

    高田 大輔, 豊国 源知, 趙 大鵬

    日本地球惑星科学連合2023年大会 2023年5月25日

  13. S-net海底観測網における遠地地震P波・S波の相対走時残差分布

    鈴木基矢, 趙大鵬, 豊国源知, 高木涼太

    日本地球惑星科学連合2023年大会 2023年5月21日

  14. Slabs, plumes and intraplate volcanism in SE Asia

    趙大鵬, 豊国源知, Hua Yuanyuan, Wang Zewei

    日本地球惑星科学連合2023年大会 2023年5月25日

  15. 地震波異方性から見たスラブ内の含水亀裂と地震発生 招待有り

    趙大鵬, Wang Zewei

    日本地球惑星科学連合2023年大会 2023年5月21日

  16. S-netデータによる東日本前弧域の構造と地震テクトニクス

    趙 大鵬, 片山 悠, 豊国 源知

    日本地震学会2022年度秋季大会 2022年10月25日

  17. 南米大陸とその周辺地域下の P波マントルトモグラフィー

    高田大輔, 豊国源知, 趙大鵬

    日本地球惑星科学連合2022年大会 2022年5月26日

  18. P-wave anisotropy and intraslab earthquakes in the Tohoku forearc

    Dapeng Zhao, Zewei Wang

    日本地球惑星科学連合2022年大会 2022年5月25日

  19. Seismic structure, anisotropy and dynamics of the big mantle wedge

    Dapeng Zhao, Ruo Jia

    日本地球惑星科学連合2022年大会 2022年5月23日

  20. Cascadia沈み込み帯の3次元異方性構造

    趙大鵬, Y. Hua

    日本地震学会2021年秋季大会 2021年10月15日

  21. 東北沖のトモグラフィーと巨大地震

    趙大鵬

    日本地球惑星科学連合2021年大会 2021年6月2日

  22. 太平洋スラブとその周辺マントルの3次元地震波異方性

    趙大鵬, Zewei Wang

    日本地球惑星科学連合2021年大会 2021年6月1日

  23. 南極大陸上部マントルのP波異方性構造

    趙大鵬, H. Zhang

    国立極地研究所2021年研究集会 2021年3月19日

  24. S-net観測網を用いた東北日本前弧域の3次元S波速度構造

    片山悠, 趙大鵬, 豊国源知

    日本地震学会2020年秋季大会 2020年10月29日

  25. S-netデータによる東日本前弧域の不均質構造と地震発生機構

    趙大鵬, Y. Hua, 豊国源知, Z. Yu

    日本地震学会2020年秋季大会 2020年10月29日

  26. 東アジア地域下の全マントルP波トモグラフィー

    片山悠, 趙大鵬, 豊国源知

    日本地球惑星科学連合2020年大会 2020年7月14日

  27. S-netとHi-netデータから推定した東北地方前弧域の構造

    趙大鵬, Yuanyuan Hua, 豊国源知

    日本地球惑星科学連合2020年大会 2020年7月14日

  28. 東アジア地域のマントル構造とダイナミクス 招待有り

    趙大鵬

    日本地球惑星科学連合2020年大会 2020年7月14日

  29. アラスカ南部下のスラブ構造と大地震の発生機構

    趙大鵬, T. Gou, Z. Huang

    国立極地研究所2020年研究集会 2020年3月26日

  30. Slab subduction and earthquake-volcano interactions in western Japan

    Dapeng Zhao, Xin Liu, Y. Hua

    2019 Fall Meeting of American Geophysical Union 2019年12月13日

  31. 2018年胆振東部地震震源域のトモグラフィーと異方性構造

    趙大鵬, T. Gou, Z. Huang, L. Wang

    日本地震学会2019年秋季大会 2019年9月17日

  32. 活火山域の深部構造・低周波地震とマグマ供給系 招待有り

    趙大鵬

    日本地球惑星科学連合2019年大会 2019年5月29日

  33. 2011年東北沖巨大地震震源域の三次元構造

    趙大鵬, Xin Liu

    日本地球惑星科学連合2019年大会 2019年5月27日

  34. 東北アジアのプレート内部火山の深部構造と起源

    趙大鵬

    日本地球惑星科学連合2019年大会 2019年5月26日

  35. Multiscale Seismic Tomography of the Earth and Moon 国際会議

    Zhao, D

    PIERS 2018 2018年8月1日

  36. Seismic imaging of East Asian orogens and subduction zones

    Zhao, D

    日本地球惑星科学連合2018年大会 2018年5月20日

  37. Tottori earthquakes and Daisen volcano: Effects of slab age, slab melting and hot mantle upwelling

    D. Zhao, X. Liu, Y. Hua

    日本地球惑星科学連合2018年大会 2018年5月20日

  38. Seismic imaging of the Asian orogens and subduction zones 国際会議 招待有り

    Zhao, D

    アジア造山と大陸変化:地質・地球物理、地球化学研究の最前線 2017年11月6日

  39. 東北沖巨大地震域の異方性トモグラフィー

    趙大鵬, Liu Xin

    日本地震学会2017年度秋季大会 2017年10月25日

  40. 日本列島と東アジア下の太平洋スラブの年齢分布

    趙大鵬, Liu Xin, S. Li, W. Wei

    日本地震学会2017年度秋季大会 2017年10月25日

  41. Anatomy of the source zones of large earthquakes in Japan 国際会議

    Zhao, D, Z. Huang, X. Liu

    IAG-IASPEI 2017 2017年7月30日

  42. Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia 国際会議

    Zhao, D, C. Chen, Y. Tian, S. Wu, A. Hasegawa, J. Lei, J. Park, I. Kang

    IAG-IASPEI 2017 2017年7月30日

  43. Seismic anisotropy tomography of the Western Pacific subduction zones 国際会議

    Zhao, D, X. Liu, W. Wei

    IAG-IASPEI 2017 2017年7月30日

  44. Seismic Tomography and Seismotectonics of West Japan to East Asia 国際会議

    Zhao, D

    Earthquake hazards and tectonics in Southwest Japan 2017年7月16日

  45. Detection of Hadean crustal material in the deep Earth and Moon

    Zhao, D, Y. Isozaki, S. Maruyama

    JpGU-AGU Joint Meeting 2017 2017年5月20日

  46. Earthquake-volcano interactions in the 2016 Kumamoto earthquake area

    Zhao, D, Z. Wang, X. Liu, Y. Nishizono, H. Inakura

    JpGU-AGU Joint Meeting 2017 2017年5月20日

  47. Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia

    Zhao, D, C. Chen, Y. Tian, S. Wu, A. Hasegawa, J. Lei, J. Park, L. Kang

    JpGU-AGU Joint Meeting 2017 2017年5月20日

  48. Seismic imaging of the subducting Philippine Sea slab

    Zhao, D

    JpGU-AGU Joint Meeting 2017 2017年5月20日

  49. Mapping the age of the subducting Pacific slab beneath East Asia

    Zhao, D, X. Liu, S. Li, W. Wei

    JpGU-AGU Joint Meeting 2017 2017年5月20日

  50. 2016年熊本震源域の地震波速度と減衰トモグラフィー

    趙 大鵬

    国際火山噴火史情報研究集会 2017年1月22日

  51. 2013年米国Wyoming州の上部マントル地震(深さ75 km)について

    趙 大鵬, X. Wang

    日本地震学会2016年秋季大会 2016年10月5日

  52. 2016年熊本地震震源域の P 波と S 波トモグラフィー

    山下 慧, 趙 大鵬, 豊国 源知

    日本地震学会2016年秋季大会 2016年10月5日

  53. 東北地方における P 波異方性トモグラフィー

    山下 慧, 趙 大鵬, 豊国 源知

    日本地震学会2016年秋季大会 2016年10月5日

  54. スラブ境界域の構造不均質と南海トラフの巨大地震

    趙 大鵬

    南海トラフ巨大地震の予測に向けた観測と研究 2016年9月30日

  55. Seismic tomography and anisotropy: New insight into mantle convection and fluid migration 国際会議

    Zhao, D

    東北大学「知」のフォーラム2016; New Challenges in Volatile Cycling in the Deep Earth 2016年7月3日

  56. プレート内部活火山下のマントル速度構造

    日本地球惑星科学連合2016年大会 2016年5月22日

  57. 実体波と表面波データの同時インバージョンから求めた日本列島下の3次元速度構造

    日本地球惑星科学連合2016年大会 2016年5月22日

  58. 日本海下の深発地震と太平洋スラブ中のmetastable olivine wedge

    日本地球惑星科学連合2016年大会 2016年5月22日

  59. 東北地方太平洋沖地震域の地震波異方性トモグラフィー

    山下 慧, 趙 大鵬, 豊国 源知, 藤澤 萌人

    日本地球惑星科学連合2016年大会 2016年5月22日

  60. Tomography of the source zone of the 2016 South Taiwan earthquake

    豊国源知, 趙大鵬, Kate Chen

    日本地球惑星科学連合2016年大会 2016年5月22日

  61. Invited Talk: Multiscale Seismic Tomography and Mantle Dynamics 国際会議

    Dapeng Zhao

    The Earth's Mantle and Core 2015年11月4日

  62. 大地震震源域の地震波トモグラフィー研究: 阪神・淡路大震災からの20 年

    趙大鵬

    日本地震学会2015年秋季大会 2015年10月25日

  63. 2015 年小笠原西方沖深発地震域のP 波トモグラフィー

    藤澤萌人, 趙大鵬, 豊国源知

    日本地震学会2015年秋季大会 2015年10月25日

  64. Seismic tomography and mantle dynamics 国際会議

    Dapeng Zhao

    2015 IAGR Annual Convention & 12th international symposium on Gondwana to Asia 2015年10月22日

  65. 西南日本弧のP波とS波減衰トモグラフィー

    Liu Xin, 趙大鵬, 西園幸久, 稲倉寛仁

    日本地球惑星科学連合2015年大会 2015年5月24日

  66. 西南日本前弧域のトモグラフィーと巨大地震の発生機構

    趙 大鵬, Liu Xin

    日本地球惑星科学連合2015年大会 2015年5月24日

  67. 西太平洋沈み込み帯の深部構造と異方性

    趙 大鵬, Wei Wei

    日本地球惑星科学連合2015年大会 2015年5月24日

  68. Cape Verdeホットスポットとマントルプルーム

    Liu Xin, 趙 大鵬

    日本地球惑星科学連合2015年大会 2015年5月24日

  69. スラブの深部構造・脱水と長白山火山の起源

    Chen Chuanxu, 趙大鵬, Tian You・Lei Jianshe, 長谷川昭, Wu Shiguo, Park Jung-Ho, Kang Ik-Bum

    日本地球惑星科学連合2015年大会 2015年5月24日

  70. New Madrid地震帯の地殻と上部マントル構造

    Chen Chuanxu, 趙 大鵬, Wu Shiguo

    日本地球惑星科学連合2015年大会 2015年5月24日

  71. ネパール地震震源域の地震波トモグラフィーと発震構造

    2015年ネパール中部地震への被災状況把握と支援に関する緊急シンポジュウム 2015年5月8日

  72. Seismic tomography and anisotropy of the Western-Pacific subduction zones

    12th International Workshop on WATER DYNAMICS 2015年3月9日

  73. 四川-雲南とチベット東縁地域の地下構造と地震火山活動

    福岡大学国際火山噴火史情報研究所 第5回研究集会ならびに第9回 西日本火山活動研究集会 2015年2月7日

  74. Seismic Velocity and Attenuation Tomography of the Source Zone of the 2011 Tohoku-oki Earthquake (Mw 9.0) 国際会議

    AGU Fall Meeting 2014年12月15日

  75. 四川-雲南とチベット東縁地域の地下構造と地震火山活動

    日本地震学会2014年秋季大会 2014年11月24日

  76. Studying the lunar interior structure using seismic tomography, geochemistry, gravity and topography 国際会議

    Japan Russia Lunar Planetary Workshop 2014年10月21日

  77. Megathrust-Zone Heterogeneity and Megathrust Earthquakes 国際会議

    AOGS2014 2014年7月28日

  78. Deep Structure of the Subducting Philippine Sea Slab 国際会議

    AOGS2014 2014年7月28日

  79. 日本沈み込み帯の流体と地震

    日本地球惑星科学連合2014年大会 2014年4月28日

  80. 長白山火山とその付近の深発地震との関係

    日本地球惑星科学連合2014年大会 2014年4月28日

  81. 2011年東北沖巨大地震域の地震波速度と減衰構造

    日本地球惑星科学連合2014年大会 2014年4月28日

  82. Interior structure of the Moon - constraints from seismic tomography, gravity and topography 国際会議

    EGU2014 2014年4月27日

  83. 日本の火山と長白山火山の深部構造とマグマ活動に関する新知見

    第8回 西日本火山活動研究集会「モニタリングとカルデラ噴火」 2013年12月14日

  84. Outer-rise 地震, プレート含水, 深発地震と長白山火山について

    日本地震学会2013年秋季大会 2013年10月7日

  85. 北海道と東北日本前弧域の構造不均質と巨大地震の発生機構

    日本地震学会2013年秋季大会 2013年10月7日

  86. Mantle tomography and dynamics of the Western-Pacific subduction zones 国際会議

    IAVCEI2013 2013年7月20日

  87. Changbai volcano: seismic tomography, origin and East-Asia tectonics 国際会議

    IAVCEI2013 2013年7月20日

  88. New mantle tomography of East Asia: Insight into slab subduction and intraplate volcanism

    日本地球惑星科学連合2013年大会 2013年5月23日

  89. 日本沈み込み帯のP波異方性トモグラフィー

    日本地球惑星科学連合2013年大会 2013年5月22日

  90. Megathrust-zoneの構造不均質と巨大地震の発生機構

    日本地球惑星科学連合2013年大会 2013年5月22日

  91. フィリピン海プレートの深い沈み込み

    日本地球惑星科学連合2013年大会 2013年5月22日

  92. Seismic imaging of subducting slabs and mantle upwelling 国際会議

    Neutrino Geoscience 2013 2013年3月21日

  93. Seismic tomography of lunar crust and mantle: Insight into PKT and deep moonquakes: 国際会議

    SELENE Symposium 2013 2013年1月23日

  94. 西南日本下のフィリピン海スラブは深さ460 km まで沈み込んでいる

    日本地震学会2012年秋季大会 2012年10月16日

  95. Mantle tomography and dynamics of the Western-Pacific and East-Asia regions 国際会議

    Global COE Program Symposium 2012 2012年9月25日

  96. Mechanism of the 2011 Tohoku-oki earthquake (Mw 9.0) sequence: Insight from 国際会議

    Global COE Program Symposium 2012 2012年9月25日

  97. Tomography of the Northeast Japan arc and mechanism of the 2011 Tohoku-okiearthquake (Mw 9.0) sequence 国際会議

    The 8th APRU Research Symposium 2012年9月20日

  98. Seismic imaging of the western Pacific and East-Asia regions 国際会議

    Conference on Geophysics of Slab Dynamics 2012年8月20日

  99. Seismic tomography of the lunar interior 国際会議

    Seminar on lunar and planetary geodesy 2012年6月19日

  100. 西太平洋と東アジア地域のマントルトモグラフィーとダイナミクス

    日本地球惑星科学連合2012年大会 2012年5月20日

  101. 波線トモグラフィーと有限周波数トモグラフィーの比較研究

    日本地球惑星科学連合2012年大会 2012年5月20日

  102. 地震波トモグラフィーから見た2011 年東北沖巨大地震系列の発生機構

    日本地球惑星科学連合2012年大会 2012年5月20日

  103. アラスカ沈み込み帯の構造不均質と地震波異方性

    極域における固体地球の振動特性・不均質構造・ダイナミクス解明に関する研究集会 2012年3月14日

  104. Mechanism of the 2011 Tohoku-oki Earthquake: Insight from Seismic Tomography 国際会議

    One Year after 2011 Great East Japan Earthquake 2012年3月3日

  105. 2011年東北沖巨大地震震源域の構造不均質と発生機構

    平成23年度東北地域災害科学研究集会 2012年1月7日

  106. Multiscale seismic imaging of the Western-Pacific subduction zone 国際会議

    AGU Fall Meeting 2011年12月

  107. Tomography of the megathrust zone and mechanism of the Tohoku-oki earthquake (Mw 9.0) 国際会議

    AGU Fall Meeting 2011年12月

  108. 東北日本弧の構造不均質, 異方性と地震テクトニクス

    日本海溝-東北日本-日本海システム研究ワークショップ 2011年11月25日

  109. Seismotectonics, Volcanism and Mantle Dynamics of East Asia 国際会議

    10th International Seminar on Seismology(One of CTBT Verification Technologies)-related Works in Far-East Asia 2011年10月31日

  110. 2011年東北沖巨大地震震源域のトモグラフィーと発生機構

    日本地震学会2011年秋季大会 2011年10月12日

  111. Seismic imaging of the Japan subduction zone 国際会議

    Workshop on Ocean Mantle Dynamics:from Spreading Center to Subduction Zone 2011年10月5日

  112. 地震と火山の相互作用について

    日本火山学会2011年秋季大会 2011年10月2日

  113. 日本海東縁地域のP波とS波トモグラフィー

    日本地球惑星科学連合2011年大会 2011年5月22日

  114. 全マントル構造不均質の遠地地震トモグラフィーへの影響について

    日本地球惑星科学連合2011年大会 2011年5月22日

  115. マントルの不均質構造と異方性のイメージング

    日本地球惑星科学連合2011年大会 2011年5月22日

  116. 東アジア地域の地震テクトニクス、火山の起源とマントルダイナミクス

    日本地球惑星科学連合2011年大会 2011年5月22日

  117. 日本列島と東アジアのマントル構造とダイナミクス:Big mantle wedge (BMW)モデル

    日本海溝-東北日本-日本海システム研究ワークショップ 2010年11月26日

  118. Dissecting the seismogenic zones in Japan, China and India 国際会議

    China-Japan Joint Workshop on Inland Earthquakes 2010年11月24日

  119. 東アジアBig mantle wedge の西端:華北クラトンの地震構造とテクトニクス

    日本地震学会2010年秋季大会 2010年10月

  120. Tomographic imaging of Earth and Moon 国際会議

    G-COE Symposium 2010 Dynamic Earth and Heterogeneous Structure 2010年7月

  121. 月内部の構造不均質と深発月震及び月表面のトリウム分布との関係

    日本地球惑星科学連合2010年大会 2010年5月

  122. SELENE-2月広帯域地震計の進捗

    日本地球惑星科学連合2010年大会 2010年5月

  123. sP波トモグラフィーによる日本海東縁地域の地殻構造

    日本地球惑星科学連合2010年大会 2010年5月

  124. 東アジア下のbig mantle wedgeとスラブの深部脱水:地震学的証拠

    日本地球惑星科学連合2010年大会 2010年5月

  125. 西太平洋地域のマントル構造とダイナミクス

    日本地球惑星科学連合2010年大会 2010年5月

  126. Seismic structure and dynamics of the Western-Pacific subduction zones 国際会議

    G-COE symposium 2010: Earthquakes, Active Tectonics and Geodynamics of Island Arcs 2010年2月

  127. Big Mantle Wedge model in East Asia 国際会議

    AGU Fall Meeting 2009年12月

  128. 2008年M8四川省大地震について

    趙大鵬, 雷建設

    日本地震学会2009年秋季大会 2009年10月

  129. Multiscale seismic tomography of slabs and mantle plumes 国際会議

    ILP Joint Task Force Meeting 2009年10月

  130. Multiscale seismic tomography of slabs and mantle plumes 国際会議

    International Symposium on Large Igneous Provinces of Asia, Mantle Plumes and Metallogeny 2009年8月

  131. 惑星の地震波トモグラフィー:地球と月

    日本地球惑星科学連合2009年大会 2009年5月

  132. 東アジア地域の地震波トモグラフィー

    日本地球惑星科学連合2009年大会 2009年5月

  133. 南極と北極地域の地震波トモグラフィーとマントルダイナミクス

    趙大鵬, 山本芳裕, 金尾政紀, 山田朗

    日本地球惑星科学連合2009年大会 2009年5月

  134. East Asia: Slabs, Volcanoes & Dynamics 国際会議

    GCOE International Symposium Circum-Pacific Subduction Zones 2009年2月

  135. Detecting the metastable olivine wedge in the subducting Pacific slab under Japan Sea 国際会議

    Zhao, D, G. Jiang, G. Zhang

    ASC-SSJ合同大会 2008年11月

    詳細を見る 詳細を閉じる

    11/24~27 Tsukuba International Congress Center (EPOCHAL TSUKUBA) 7th General Assembly of Asian Seismological Commission and Seismological Society of Japan, 2008 Fall meeting

  136. 長白山型火山とその世界的分布

    趙大鵬, 山本芳裕

    日本火山学会2008年度秋季大会 2008年10月

    詳細を見る 詳細を閉じる

    10/10~10/12 於:岩手大学

  137. 南極と北極地域の地震波トモグラフィーとマントル構造

    趙大鵬, 山本芳裕, 金尾政紀, 山田朗

    第28回極域地学シンポジウム 2008年10月

    詳細を見る 詳細を閉じる

    10/16~10/17 於:国立極地研究所

  138. 後続波は地震波トモグラフィーにとっても重要である

    趙大鵬, 海野徳仁, 長谷川昭

    日本地球惑星科学連合2008年大会 2008年5月

  139. 東アジア大陸内部の活火山の深部構造と起源

    趙大鵬, 植木貞人, 太田雄策

    日本地球惑星科学連合2008年大会 2008年5月

  140. Potential of seismic tomography for understanding subduction zone tectonics 国際会議

    6th International Tectonics Meeting 2008年2月

  141. 西太平洋沈み込み帯の浅部と深部構造

    趙大鵬, 植木貞人, 海野徳仁, 長谷川昭

    日本地震学会2007年秋季大会 2007年10月

  142. Global seismic tomography and mantle dynamics 国際会議

    EASTEC symposium 2007 Dynamic Earth - its origin and future- 2007年9月

    詳細を見る 詳細を閉じる

    Sendai City War Reconstruction Memorial Hall

  143. Multiscale seismic tomography of subduction zones 国際会議

    Subduction Zone Geodynamics 2007年6月

  144. sP depth phaseを用いた日本列島周辺海域の三次元構造決定

    趙大鵬, 海野徳仁, 長谷川昭

    日本地球惑星科学連合2007年大会 2007年5月

  145. 地球内部のmulti-scaleイメージとダイナミクス

    趙大鵬, 長谷川昭, 大谷栄治

    日本地球惑星科学連合2007年大会 2007年5月

  146. 速度境界を考慮したdouble-difference tomography

    趙大鵬, 江国明, 田有, 長谷川昭

    日本地球惑星科学連合2007年大会 2007年5月

  147. Ehime-2006モデルから見たウラル山脈下の深部構造

    趙大鵬, 山田朗, 趙ルーシー

    日本地球惑星科学連合2007年大会 2007年5月

  148. Tomographic imaging of subduction zones 国際会議

    Subduction Dynamics: Bridging the Scales 2007年5月

  149. 西太平洋島弧と東アジア地域の地下構造と地震火山活動

    趙大鵬

    西日本火山活動研究集会 2007年3月

  150. 世界最新の高分解能地震波トモグラフィー法の開発とその応用

    愛媛大学研究開発支援公開シンポジウム 2007年2月

  151. Seismic images of active upwellings and intraplate volcanism 国際会議

    AGU Fall Meeting 2006年12月

  152. Seismic structure and dynamics of the Eurasian continent 国際会議

    D. Zhao

    International Symposium for the 50th Anniversary of the Chinese Academy of Geological Science 2006年10月

    詳細を見る 詳細を閉じる

    Chinese Academy of Geological Science

  153. ユーラシア大陸のマントル構造と地震・火山活動

    趙大鵬, 山田朗

    日本地震学会秋季大会 2006年10月

  154. 地震波トモグラフィー研究の最新展開 国際会議

    21世紀COE先端地球惑星科学セミナー 2006年9月12日

  155. Global seismic tomography: Implications for global mass circulation 国際会議

    D. Zhao

    International Symposium “Accretionary Orogens and Continental Growth” 2006年9月

  156. 3-D crust and mantle structure of East Asia margin 国際会議

    D. Zhao

    日本地質学会2006年年会 2006年9月

  157. Seismic images of mantle plumes, subducting slabs and core-mantle boundary 国際会議

    Goldschmidt Conference 2006年9月

  158. Mantle structure and intraplate volcanism and tectonics in Eastern Eurasia 国際会議

    D. Zhao

    AGU Western Pacific Geophysics Meeting 2006年8月

    詳細を見る 詳細を閉じる

    Beijing International Convention Center

  159. 全地球地震波トモグラフィー:Ehime-2006モデル

    趙大鵬, 山田朗, 趙ルシー, 入舩徹男

    地球惑星合同大会 2006年5月

  160. Multiscale seismic tomography: Insight into seismotectonics, volcanism, and deep Earth dynamics 国際会議

    D. Zhao

    The Kanamori symposium 2006年2月

  161. Seismic tomography of mantle plumes, subducting slabs and core-mantle boundary 国際会議

    International Workshop on Post-Perovskite 2005年10月

  162. Multiscale seismic tomography of mantle plumes and subducting slabs 国際会議

    D. Zhao

    Chapman Conference: The Great Plume Debate 2005年8月

  163. Multiscale seismic tomography of the Earth 国際会議

    D. Zhao

    21-COE International Symposium 2005年7月

  164. Multi-scale seismic tomography: insight into seismotectonics, volcanism and deep Earth dynamics 国際会議

    D. Zhao

    International Workshop on Continental Lithosphere 2005年6月

  165. Structure and dynamics of island arcs and continental margins 国際会議

    D. Zhao

    The 5th IPACES International Workshop 2005年6月

  166. Structure, seismicity and volcanism of the North China region 国際会議

    D. Zhao

    The Great North China Symposium 2005年6月

  167. Deep structure and its relationship to seismic and volcanic activity in East Asia 国際会議

    International Symposium on East Asia Structure and Tectonics 2002年6月

  168. The 2001 Geiyo earthquake and the structure of the warm Philippine Sea slab under Southwest Japan 国際会議

    Annual Meeting of Seismological Society of America 2002年4月

  169. A new tomography of the mantle: Slicing plumes and superplumes 国際会議

    International Symposium on Superplumes 2002年1月

︎全件表示 ︎最初の5件までを表示

共同研究・競争的資金等の研究課題 15

  1. 最先端の地震波トモグラフィー法による巨大地震震源域の3次元構造の解明

    趙 大鵬, 豊国 源知

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:Tohoku University

    2019年4月 ~ 2024年3月

    詳細を見る 詳細を閉じる

    S-netで記録された走時データを用いて2011年東北地方太平洋沖地震(Mw9.0)震源域の3次元速度構造を調べた結果,この大地震の破壊は,深い側の硬い岩石と浅い側の柔らかい岩石との構造境界から開始したことがわかった.浅い側の比較的に柔らかい岩石は太平洋プレートが沈み込む日本海溝にまで続いており,このような柔らかい岩石では破壊を止めることができず,海溝近傍まで大きなすべりが及び,大津波が発生したと思われる(Hua & Zhao et al.2020,Nature Communications 11,1163). 基盤観測網で記録された近地地震の波形データを用いて2018年胆振東部地震(M6.7)震源域の3次元P波とS波減衰構造を推定した結果,この地震が東北日本弧と千島弧の衝突で起こり,またその発生が沈み込んでいる太平洋スラブ脱水の影響を受けたことが分かった.同じタイプの大地震が北海道南部地域で今後また起こりうると思われる (Hua & Zhao et al.2019,Scientific Reports 9,13914). 大量の近地地震走時データを用いて2018年Anchorage地震(Mw7.1)と1964年アラスカ巨大地震(Mw9.2)震源域の3次元P波とS波速度構造及びポアソン比分布を推定した結果,以下のことがわかった.(1) 2018年Anchorage地震が太平洋スラブの中で起こった正断層型の地震で,震源域に顕著な低速度・高ポアソン比の異常体が存在する;(2) 1964年アラスカ巨大地震の震源がスラブ境界面上おける構造の急変部に位置し,その上の北米プレートに高ポアソン比異常体が存在する;(3)スラブの脱水と震源域の構造不均質がこれらの大地震の発生に影響を及ぼした(Gou & Zhao et al.2020,Geochem.Geophys.Geosyst.21).

  2. ポスト冥王代

    磯崎 行雄, 堤 之恭, 山本 伸次, 鈴木 寿志, 尾上 哲治, 趙 大鵬, 高畑 直人, 佐野 有司

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    研究種目:Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    研究機関:The University of Tokyo

    2014年7月 ~ 2019年3月

    詳細を見る 詳細を閉じる

    ジルコン選別専用装置AZSを開発し、多数のジルコンU-Pb年代測定の結果、200粒以上の冥王代ジルコンを獲得した。月のジルコンとの比較から、太陽近傍で共通に起きたABEL爆撃事件を支持する物証を得た。ジルコン中に炭素など生命必須元素を検出し、43.7億年前の地球表層に生命発生条件があったことを示した。マントル不均質性をトモグラフィー解析によって可視化し、マントル中部および底部に残存する冥王代地殻らしき塊を検出した。冥王代で頻繁だった地球外物質流入の定量的見積もり方法として未確立だったヘリウム同位体比測定の有効性を、2.5億年前の深海相の地層を使って確認し、新たな検査手法として提案した。

  3. 大陸成長史と構造浸食:第二大陸の成長とマントルダイナミクス

    丸山 茂徳, 横山 哲也, 河合 研志, 千秋 博紀, 趙 大鵬, 大森 聡一, 駒林 鉄也

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)

    研究種目:Grant-in-Aid for Scientific Research (S)

    研究機関:Tokyo Institute of Technology

    2011年4月 ~ 2016年3月

    詳細を見る 詳細を閉じる

    過去の構造浸食の定量的評価や花崗岩地殻の生成機構や形成量の定量化をもとに、表層の10倍以上に相当する第二大陸がマントル遷移層に存在することを実証した。そして、第二大陸の自己発熱効果による超大陸の離合集散の運動史を18億年前に遡り解明し、第三大陸(崩落した原初大陸、とりわけKREEP玄武岩)は、D“層の中の主要構成成分であることを強く示唆する証拠を得た。最後に、大陸三層モデルと地球史を組み合わせたモデルを提案し、第二大陸の成長を含む地球のマントルダイナミクスの体系を整えた。このモデルによって、これまでの対流数値計算では説明できなかった、液体核の形成史などの研究に新たな方向を示した。

  4. 日本列島から中国にかけての東アジア全域のマントル微細構造とダイナミクスの解明

    趙 大鵬, 山田 朗

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    研究種目:Grant-in-Aid for Scientific Research (A)

    2005年 ~ 2008年

    詳細を見る 詳細を閉じる

    本研究は, 地震波トモグラフィー法と波形解析法などの地震学的手法を駆使し, 日本列島周辺から中国大陸にかけての東アジア全域における, 幾つかの地球科学の重要な研究テーマを解明した. この地域の活発な地震・火山活動は, 太平洋プレートの深い沈み込み及び地殻・上部マントルの構造不均質の影響を強く受けていることがわかった. これらの成果はこの地域の地震発生機構と島弧火山・大陸内部火山の起源の解明およびその災害の予測と軽減のために極めて重要である.

  5. 放射光と超高圧技術による地球深部物質の探査

    入舩 徹男, 井上 徹, 土屋 卓久, 大藤 弘明, 山田 朗, 肥後 祐司, 趙 大鵬, 山崎 大輔, 阪本 志津枝, 西山 宣正

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Creative Scientific Research

    研究機関:Ehime University

    2003年 ~ 2007年

    詳細を見る 詳細を閉じる

    放射光と超高圧発生技術の組み合わせによる地球深部の物質学の新たな展開を目指し、(1)焼結晶ダイヤモンドアンビルを利用したマルチアンビル装置による70万気圧領域の高圧発生技術、(2)超音波測定法による20万気圧領域での弾性波速度精密測定技術の開発をおこなった。この結果(1)に関しては当初の目標を上回る80万気圧領域の超高圧発生に成功し、下部マントル上部〜中部領域に相当する圧力・温度条件下でのマントル物質の新たな相転移の発見や、精密な状態方程式の決定をおこなった。また、(2)に関しても当初の目標を達成し、20万気圧・1700Kというマントル遷移層中部に対応する高温高圧下で、マントルおよび沈み込むスラブ関連物質の弾性波速度を決定した。特にマントル遷移層で重要な高圧相であるリングウッダイトとメージャライトの弾性波速度を精密に決定し、得られたデータを基にしてマントル遷移層の化学組成に重要な制約を与えた。また、同様の手法を用いてMgOの弾性波速度と格子体積の同時測定をおこない、これらの実験データから新たな状態方程式を構築し、絶対圧力スケールを提案した。一方で、申請者らが開発した世界最硬ナノ多結晶ダイヤモンド(ヒメダイヤ)を高圧装置に応用し、放射光実験により発生圧力の評価をおこなった。ヒメダイヤはマルチアンビル装置とダイヤモンドアンビル装置の各々に対して、アンビル材料として利用を試みた。この結果、それぞれ110GPaおよび220GPa程度の圧力発生が確認され、今後の本格的利用におけるこの新しい材料のポテンシャルの高さを示した。

  6. ホットスポットの起源

    高橋 栄一, 廣瀬 敬, 平田 岳史, 金嶋 聡, 趙 大鵬, 木村 純一, 内海 渉

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Specially Promoted Research

    研究種目:Grant-in-Aid for Specially Promoted Research

    研究機関:Tokyo Institute of Technology

    2000年 ~ 2004年

    詳細を見る 詳細を閉じる

    高橋、平田、木村はマントルプルームの構成物質、温度、マグマの多様性を生ずる原因などを解明する目的でハワイホットスポット火山の研究を引き続き行い、プルーム中心からの火山距離に従ってマグマ組成が系統的に変化することを明らかにした(Ren、Takahashi,2004、2005)。さらにメルト泡有物の微量元素分析から、マグマの生成がプルーム内部に含まれるエクロジャイト成分に大きく依存し、火山の位置によるマグマ組成変化は、プルーム温度構造によるエクロジャイト成分とカンラン岩成分のマグマへの寄与の差であることを世界で始めて明らかにした(Ren, Takahashi Hirata, Natureに印刷中2005)。さらに高橋らは、エクロジャイトのマントル深部での密度を精密に決定するため、構成物質の量比の温度変化を相平衡実験で決定し(Aoki and Takahashi,2004)、エクロジャイト成分を構成する各種鉱物の弾性的性質をSPRING-8の放射光施設でX線その場観察により決定した(Nishihara, Takahashi.,2004a, b, c、2005a, b)。一方、広瀬は、マントルプルーム発生場である、下部マントル最下部および地球中心核の化学組成を解明するために単結晶ダイヤモンドアンビル装置を用いて200万気圧に達する高圧実験を成功させ、外核に数%の酸素が溶け込んでいることの初めての実験的証拠を見出し(Takafuji & Hirose,2004)また核に接するマントル最下部はMgSiO3ペロフスカイトがさらに相転移した高圧相でできていることを世界で始めて明らかにした(Murakami Hirose 2004 Science)。さらに金嶋と趙は地震学によりマントルプルームの深部構造および核の内部構造の研究に世界で始めて成功させた(Helffrich and Kaneshima,2004 Science)。

  7. 活断層への応力集中機構の研究

    長谷川 昭, 岡田 知己, 松澤 暢, 海野 徳仁, 趙 大鵬, 松本 聡

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:Tohoku University

    1999年 ~ 2002年

    詳細を見る 詳細を閉じる

    本研究は,活断層への応力集中機構の解明を目指して,活断層周辺域の地殻不均質構造-すなわち3次元地震波速度構造・減衰構造・異方性構造・散乱係数分布・S波反射体構造等について,詳細な調査を試みたものである.さらに,活断層周辺の応力場の情報を抽出すべく,活断層域およびその周辺で発生した中小地震のメカニズム解や震源過程の調査,およびb値の時空間分布の調査を試みた.これらの系統的な調査により,以下にみるように,活断層への応力集中機構を理解する上で重要な進展がみられた. 地震波トモグラフィの研究では,最上部マントルから下部地殻にかけて分布する部分溶融域の存在を見出した.さらに,そこから地殻上部に向かってH_2Oが上昇する様子をも写し出した.そこには,上部地殻の地震発生層全体を断ち切った地震の震源域が位置している.すなわち,メルトやH_2Oが下部地殻や上部地殻に局在すること,それが地震発生に密接に関わっていることを示唆している.流体が存在すれば,そこではせん断強度が小さくなり,局所的に短縮変形が起こり易くなることが期待される.実際,そのような場所でプレート衝突方向の短縮量が局所的に大きいことが,GPSデータの解折から見出された。これは,活断層への応力集中過程にH_2Oが重要な役割を果たしていることを強く示唆するものである。 さらに,1998年雫石地震(M6.1)の震源域近傍で実施された人工地震実験の波形データを詳しく解折することにより,震源域の地震波速度と散乱体の分布が,地震前後の約3ヶ月の間に変化したことが見出された.変化量はわずかであるが,工夫することにより波形の微細な変化から情報を抽出したもので,このような短期間での変化は原因が流体(H_2O)の移動にあることをうかがわせる.ここでも地震発生へのH_2Oの関与を示唆している.

  8. 日本列島下の三次元地震波速度構造と応力場に関する研究

    趙 大鵬

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    研究種目:Grant-in-Aid for Scientific Research (B)

    研究機関:Ehime University

    1999年 ~ 2002年

    詳細を見る 詳細を閉じる

    地殻大地震の発生について重要な知見が得られた.西暦679年〜2002年の1324年間に日本列島内陸部の20km以浅の地殻に発生したM5.7以上の直下型地震約370個について,その分布を日本列島下の3次元地震波トモグラフィーと比較した.その結果,内陸直下型地震の多くは地震波低速度域の周辺で発生していることがわかった. 1995年兵庫県南部地震と2000年鳥取県西部地震も顕著な低速度域(速度偏差5〜6%)の付近で発生した.東北、関東、中部及び中国地方北部のような火山地域では,地震波低速度域は火山及び地下のマグマ溜まりに起因すると推測される.このような地域では,活火山,地殻内S波反射面,低周波微小地震が低速度域に分布し,また低速度域とtopography highとの良い相関が見られる.上部地殻内の微小地震の下限は活火山の下では浅くなっている.これらの事実から,地殻内の高温異常領域が低速度域を形成するため,そこでは強度が弱くなり,塑性変形を起こしており,直下型大地震はその周辺で発生し易いと思われる.紀伊半島,四国と中国地方の南部でも顕著な低速度域が見られ、地殻大地震はその周辺域に分布する傾向がある.これらの地域は沈み込み帯の前弧側に位置しており,熱流量と地温勾配が小さく,地温が低いことがわかっている.また,地表には火山が見られない.これらのことから,以上のような地域にある低速度異常体は高温によるものとは考えにくい.兵庫県南部地震の震源域の微細地殻構造を推定した結果,地殻中の水が兵庫県南部地震の発生に重要な役割を果たしたことが解かった.大地震と水との関係が,初めて詳細にわかるようになってきた.一般に地殻内の水の起源としては,地殻内の鉱物の脱水,間隙水,地上の降水・海水の浸透などが考えられる.兵庫県南部地震震源域の水の起源はもう1つの可能性は西南日本下へ沈み込んでいるフィリピン海プレートからの脱水である.

  9. 地殻・上部マントルにおける応力場に関する研究 競争的資金

    1995年 ~ 2000年

  10. Stress field in the crust and upper mantle 競争的資金

    1995年 ~ 2000年

  11. 地震・火山・地球内部構造 競争的資金

    制度名:The Other Research Programs

    1991年4月 ~

  12. 地震波トモグラフィーに関する研究 競争的資金

    1988年 ~

  13. A study of seismic tomography 競争的資金

    1988年 ~

  14. Studying the Earth's Interior Structure and Earthquake Generating Mechanism using seismological Methods 競争的資金

    1986年 ~

  15. 地震学的手法を用いた地球内部構造と地震発生機構の研究 競争的資金

    1986年 ~

︎全件表示 ︎最初の5件までを表示

Works(作品等) 6

  1. Seismological Observation and investigation in the central Tohoku region, Japan

    1998年 ~

  2. Seismological Observation and investigation in the central Tohoku region, Japan

    1998年 ~

  3. 東北地方中央部における地震観測と調査研究

    1998年 ~

  4. 東北地方脊梁山地における地震学的観測と調査

    1997年 ~

  5. Observation and Investigation of Seismic activity in Sekiryo mountain region, Japan

    1997年 ~

  6. Observation and Investigation of Seismic activity in Sekiryo mountain region, Japan

    1997年 ~

︎全件表示 ︎最初の5件までを表示

社会貢献活動 4

  1. 建築研究所 国際地震工学研修

    2017年4月24日 ~

    詳細を見る 詳細を閉じる

    講演者:趙大鵬 講演タイトル「Tomography and dynamics of Western-Pacific subduction zones」

  2. 建築研究所 国際地震工学研修

    2016年3月10日 ~

    詳細を見る 詳細を閉じる

    講演者:趙大鵬 講演タイトル「Tomography and dynamics of Western-Pacific subduction zones」

  3. 建築研究所 国際地震工学研修

    2015年5月19日 ~

    詳細を見る 詳細を閉じる

    講演者:趙大鵬 講演タイトル「Tomography and dynamics of Western-Pacific subduction zones」

  4. 建築研究所 国際地震工学研修

    2014年5月15日 ~

    詳細を見る 詳細を閉じる

    講演者:趙大鵬 講演タイトル「Tomography and dynamics of Western-Pacific subduction zones」

メディア報道 21

  1. 趙大鵬先生に会いに行く

    日々の新聞社 日々の新聞 トップ1面

    2024年4月30日

    メディア報道種別: 新聞・雑誌

  2. その地震、原因は「水」?

    毎日新聞

    2023年9月6日

    メディア報道種別: 新聞・雑誌

  3. M9以上の巨大地震発生箇所、プレート下に異常構造、東北大グループが発見

    科学新聞社 科学新聞 トップ1面

    2021年5月21日

    メディア報道種別: 新聞・雑誌

  4. 巨大地震の一因に異常マントル構造

    河北新報社 河北新報

    2021年4月27日

    メディア報道種別: 新聞・雑誌

  5. 理工系大学ランキング

    ニュートンNewton ニュートンNewton

    2021年3月26日

    メディア報道種別: 新聞・雑誌

  6. 東北大、日本地下の3次元地震波異方性構造を解明

    日本経済新聞社 日本経済新聞

    2021年1月21日

    メディア報道種別: 新聞・雑誌

  7. 「軟らかい岩石」大津波の一因

    読売新聞社 読売新聞

    2020年5月31日

    メディア報道種別: 新聞・雑誌

  8. <熊本地震>震源直下の水で揺れ拡大、断層の摩擦減少、東北大グループが分析

    河北新報社 河北新報

    2018年11月2日

    メディア報道種別: 新聞・雑誌

  9. 巨大地震は岩板の固さが引き金か、太平洋沖の海底下を探る

    産経新聞社 産経新聞

    2018年9月23日

    メディア報道種別: 新聞・雑誌

  10. 巨大災害 MEGA DISASTER 地球大変動の衝撃 第3集 巨大地震 見えてきた脅威のメカニズム

    NHK

    2014年9月20日

    メディア報道種別: テレビ・ラジオ番組

  11. 独占インタビュー 原発の地下に地震の巣を発見

    週刊現代 週刊現代

    2012年3月15日

    メディア報道種別: 新聞・雑誌

  12. 地震のツメ痕を徹底検証 断層内部の水が原因

    テレビ朝日

    2012年2月19日

    メディア報道種別: テレビ・ラジオ番組

  13. 同じ地下構造ではM7の地震が・・・福島第一原発“直下型地震”の懸念

    フジテレビ

    2012年2月16日

    メディア報道種別: テレビ・ラジオ番組

  14. 地下で異変?福島原発で直下型地震の危険

    テレビ朝日

    2012年2月16日

    メディア報道種別: テレビ・ラジオ番組

  15. 福島第1原発の直下で地震も いわきと地下構造類似

    2012年2月15日

    メディア報道種別: その他

  16. 福島第1原発の直下で地震も 東北大教授ら専門誌で発表 「地下深部から水」

    河北新報

    2012年2月15日

    メディア報道種別: 新聞・雑誌

  17. Fukushima at increased earthquake risk

    New Release at the top page of the European Geosciences Union (EGU)

    2012年2月14日

    メディア報道種別: その他

  18. 原発直下で地震の恐れも 深部から水供給

    産経ニュース

    2012年2月14日

    メディア報道種別: その他

  19. 宮城沖 「震源になりやすい」

    朝日新聞

    2011年10月13日

    メディア報道種別: 新聞・雑誌

  20. プレートのゆくえ① 大陸地下へ1000キロもぐる

    朝日新聞

    2006年11月

    メディア報道種別: 新聞・雑誌

  21. 地震発生地域の予測は可能

    高知新聞社 高知新聞

    1999年3月30日

    メディア報道種別: 新聞・雑誌

︎全件表示 ︎最初の5件までを表示

その他 8

  1. 長白山火山の起源の研究

    詳細を見る 詳細を閉じる

    長白山火山の起源の研究

  2. 東アジア地域の地震・火山の研究

    詳細を見る 詳細を閉じる

    東アジア地域の地震・火山の研究

  3. 地震波トモグラフィーによる地殻構造推定技術の高度化

    詳細を見る 詳細を閉じる

    火山体下のマグマ溜りや内陸地震断層などの地殻構造異常体をより高い精度で推定するために、地震波トモグラフィー解析技術を高度化する。特に地殻と上部マントル内の反射波や変換波などの後続地震波データを用いた日本列島及びその周辺海域下の地殻トモグラフィーの解析法を検討する。

  4. 中国南海地域の地下構造

    詳細を見る 詳細を閉じる

    中国南海地域の地下構造

  5. マントルプルームのトモグラフィー

    詳細を見る 詳細を閉じる

    マントルプルームのトモグラフィー

  6. 東アジア地域の地下構造

    詳細を見る 詳細を閉じる

    東アジア地域の地下構造

  7. アラスカ沈み込み帯の構造とダイナミクス

    詳細を見る 詳細を閉じる

    アラスカ沈み込み帯の構造とダイナミクス

  8. インド地域の地下構造と地殻大地震の発生機構

    詳細を見る 詳細を閉じる

    インド地域の地下構造と地殻大地震の発生機構

︎全件表示 ︎最初の5件までを表示