TOHOKU UNIVERSITY Researchers - Hideko Takayanagi

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Hideko Takayanagi

Section

Graduate School of Science

Job title

Associate Professor

Degree

Doctorate of Science (Nagoya University)

researchmap

https://researchmap.jp/hidekotakayanagi

J-GLOBAL ID

201401062426599396

Committee Memberships 12

Palaentological Society of Japan　Board member

2026/04 - Present
The Geological Society of Japan　Delegate

2024/06 - Present
JpGU　Biogeosciences Section Board Members

2022/04 - Present
Paleo10　Councilor

2022/04 - Present
JSPS　Frontiers of Science (FoS) Planning Group Co-Chair

2024/04 - 2025/07
Paleontological Society of Japan　Committee for Consideration of Incorporation

2023/06 - 2025/06
JSPS　Frontiers of Science (FoS) Planning Group Co-Chair

2023/05 - 2024/03
日本地質学会　評議員

2018/04 - 2022/03
日本地質学会　代議員

2016/04 - 2018/03
地球環境史学会　評議員

2016/04 - 2018/03
Paleosciences Society　Councilor

2014/05 - 2016/04
The Geological Society of Japan　Representative

2014/04 - 2016/03

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Professional Memberships 6

Japan Geoscience Union
The Sedimentological Society of Japan
Paleontological Society of Japan
The Geochemical Society of Japan
PALEO10: Paleosciences Society
The Geological Society of Japan

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Research Interests 10

Carbonate reservoir
Water mass
Ocean circulation
Paleoenvironments
Paleontology
Climate change
Paleoceanography
Paleoclimatology
Paleoenvironmentology
Carbonate Sedimentology & Geochemistry

Research Areas 3

Natural sciences / Solid earth science /
Environmental science/Agricultural science / Environmental dynamics /
Natural sciences / Biogeoscience /

Awards 12

Outstanding student presentation award

2024/09　The Geological Society of Japan
Outstanding student presentation award

2024/09　The Geological Society of Japan
Outstanding Student Presentation Award

2024/04　Japan Geoscience Union　Importance of interaction between organic matter and hydrothermal fluids for the genesis of ca. 15 Ma Kuroko deposits
26th JCRS Outstanding Presentation Award

2023/11　The Japanese Coral Reef Society
理学・生命合同シンポジウム2021 優秀ポスター賞

2021/03　東北大学大学院理学・生命科学研究科　隠岐の島沖で採取された現生腕足動物（Pictothyris picta）殻の炭素・酸素同位体組成および微量元素濃度
Excellent presentation award

2018/11　Paleo10　Trace element variations in modern brachiopod shells and their causes
Excellent poster award

2018/06　Paleontological Society of Japan　Quantative Evaluation of influence of meteoric diagenesis on fossil brachiopod shells from siliciclastic rock
日本地質学会第123年学術大会（東京・桜上水大会）優秀ポスター賞

2016/09　日本地質学会　腕足動物化石の炭素・酸素同位体組成と殻の微細構造は続成作用の進行によってどのように変化するか
日本地質学会小藤文次郎賞

2016/09　日本地質学会
日本古生物学会第164回例会優秀ポスター賞

2015/01/31　日本古生物学会
121th Annual Meeting of the Geological Society of Japan

2014/09　日本地質学会
114th Annual Meeting of the Geological Society of Japan

2007/09　日本地質学会

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Papers 78

New insights into the formation of sediment-hosted volcanogenic massive sulfide deposits by quadruple sulfur and multiple strontium isotopes

Tomoaki Koya, Akizumi Ishida, Yuichiro Ueno, Daisuke Araoka, Hideko Takayanagi, Al Kurihara, Yumiko Watanabe, Yasufumi Iryu, Takeshi Kakegawa

Geochimica et Cosmochimica Acta　2026/08

DOI： 10.1016/j.gca.2026.08.019 　
New screening method for well-preserved brachiopod shells and shell portions for paleoenvironmental analysis: Raman spectroscopy Peer-reviewed

Kazuma Oikawa, Hideko Takayanagi, Hiroshi Fujioka, Mamoru Takizawa, Miki Arakane, Yui Kouketsu, Thasinee Charoentitirat, Hidetoshi Hara, Koshi Yamamoto, Osamu Abe, Ryuji Asami, Komei Yamagishi, Hiroto Oda, Yasufumi Iryu

Progress in Earth and Planetary Science　13　(1)　2026/03/26
Publisher: Springer Science and Business Media LLC
DOI： 10.1186/s40645-026-00811-0 　

eISSN： 2197-4284

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Abstract Brachiopod shells have been widely used as paleoenvironmental recorders because of their robust preservation in fossil records. However, accurately reconstructing past seawater temperatures from their oxygen (δ ¹⁸ O) and clumped isotope compositions requires identifying shells/shell portions that are minimally affected by kinetic isotope effects (KIE) and diagenetic alteration. This study investigated the potential of Raman spectroscopy as a rapid and non-destructive screening method for shells/shell portions. We conducted Raman spectroscopy on fossil and modern brachiopod calcite shells from Japan and Thailand, focusing on the ν₁ peak center position (peak center) and full width at half maximum (FWHM). The results revealed that intraspecific variations in the peak center and FWHM were relatively small, with each species exhibiting a distinct peak center and FWHM range. The brachiopod shell portions with low Mg and Sr concentrations exhibited peak centers and FWHM values that were closer to those of pure calcite. Depth profile analyses further indicated that shell portions at a 60–90% relative depth from the outer surface were the least affected by KIE and crystal distortion. Shells altered by meteoric diagenesis exhibited significant shifts in the peak center and FWHM, with higher Mn concentrations being more intense, corroborating diagenetic alteration. These findings suggest that Raman spectroscopy is an effective screening tool for selecting well-preserved brachiopod shells/shell portions suitable for paleoenvironmental reconstructions. Integrating Raman spectroscopy with conventional screening methods to identify well-preserved shells/shell portions is expected to raise the reliability of δ ¹⁸ O- and clumped isotope-based paleotemperature reconstructions.
Chronostratigraphical ranges of Lower Jurassic larger benthic foraminifera and lithiotid bivalves calibrated by carbon and strontium isotope stratigraphy (Southern Alps, Italy) Peer-reviewed

Renato Posenato, Davide Bassi, Mariano Parente, Hideko Takayanagi, Anna Ciprian, Claudio Garbelli, Andrea Montanaro, Yoshihiro Asahara, Yasufumi Iryu

Palaeogeography, Palaeoclimatology, Palaeoecology　113423-113423　2025/11
Publisher: Elsevier BV
DOI： 10.1016/j.palaeo.2025.113423 　

ISSN： 0031-0182
Gridded oceanographic data-based tridacnine oxygen isotope thermometers: advantages and problems Peer-reviewed

Hiroto Oda, Shion Tanaka, Hideko Takayanagi, Ryuji Asami, Katsuhiro Sano, Yasufumi Iryu

Progress in Earth and Planetary Science　2025/10/15

DOI： 10.1186/s40645-025-00769-5 　
Origin of interstitial water beneath the continental shelf offshore northwestern Australia: insights from hydrogen and oxygen isotope compositions Peer-reviewed

Kosuke Yoshii, Hideko Takayanagi, Toshihiro Miyajima, Lars Reuning, Kazuyuki Yamamoto, Yasufumi Iryu

Progress in Earth and Planetary Science　2025/06/23

DOI： 10.1186/s40645-025-00722-6 　
Tectono-Sedimentary Evolution of the Cenomanian Carbonate Platform in the Eastern Arabian Plate Peer-reviewed

K. Yamamoto, H. Takayanagi, M. Aljneibi, Z. Al Farhan, T. Sato, Y. Tsuji, Y. Iryu

EAGE/AAPG Workshop on Tectonostratigraphy of the Arabian Plate　1-3　2025/06
Publisher: European Association of Geoscientists & Engineers
DOI： 10.3997/2214-4609.2025645006 　
Effects of artificial diagenetic alteration on the microstructure, isotopic composition, and metal element concentrations in brachiopod shells Peer-reviewed

Hiroshi Fujioka, Katsuhiko Suzuki, Hideko Takayanagi, Eiji Tasumi, Koshi Yamamoto, Hiroaki Ohfuji, Toshihiro Miyajima, Yasufumi Iryu

GEOCHEMICAL JOURNAL　2025

DOI： 10.2343/geochemj.GJ25005 　
Public symposium “Biogenic Reefs: Past and Future” Peer-reviewed

Yasufumi IRYU, Natsuko ADACHI, Kazuyuki YAMAMOTO, Kazuhiko FUJITA, Ryuji ASAMI, Hiroya YAMANO, Hideko TAKAYANAGI

Journal of the Japanese Coral Reef Society　26　(1)　59-80　2025/01
Publisher: Japanese Coral Reef Society
DOI： 10.3755/jcrs.26.59 　
Paleoenvironmental significance of growth story of long-living deep-water acervulinid macroids from Kikai-jima shelf, Central Ryukyu Islands, Japan Peer-reviewed

Davide Bassi, Juan Carlos Braga, Ryuji Asami, Kazuhisa Goto, Sönke Szidat, Hideko Takayanagi, Yasufumi Iryu

Palaeogeography, Palaeoclimatology, Palaeoecology　112254-112254　2024/05
Publisher: Elsevier BV
DOI： 10.1016/j.palaeo.2024.112254 　

ISSN： 0031-0182
A sub-fossil coral Sr/Ca record documents meridional variability of the Intertropical Convergence Zone in the eastern Indian Ocean Peer-reviewed

Miriam Pfeiffer, Hideko Takayanagi, Lars Reuning, Takaaki Konabe Watanabe, Saori Ito, Dieter Garbe-Schönberg, Tsuyoshi Watanabe, Chung-Che Wu, Chuan-Chou Shen, Jens Zinke, Geert-Jan Brummer, Sri Yudawati Cahyarini

2024/04/15
Publisher: Copernicus GmbH
DOI： 10.5194/cp-2024-25 　

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Abstract. Sea surface temperature (SST) variability in the south-eastern tropical Indian Ocean is crucial for rainfall variability in Indian Ocean rim countries. A large body of literature has focused on zonal variability associated with the Indian Ocean Dipole (IOD), but it is unclear whether meridional shifts in the position of the Intertropical Convergence Zone (ITCZ), which at present co-vary with the IOD, may also occur independently. We have developed a new, monthly resolved Sr/Ca record from a sub-fossil coral cored at Enggano Island (Indonesia, 5° S, 102° E). Core sections containing diagenetic phases are omitted from the SST reconstruction. U/Th dating shows that the Sr/Ca-based SST record extends from 1917–1868 and from 1861–1823 with a relative age uncertainty of ±2.4 years (2σ). At Enggano Island, coastal upwelling and cooling in austral spring is coupled to the position of the ITCZ, and impacts SST seasonality. The sub-fossil coral indicates an increase in SST seasonality due to enhanced austral spring cooling between 1917 and 1855, which we attribute to stronger SE winds and a northward shift in the position of the ITCZ in austral spring. A nearby sediment core indicates SST cooling and a shallowing of the thermocline prior to ~1930. These results are consistent with an increase in the North-South SST gradient in the eastern Indian Ocean calculated from historical temperature data, that is not seen in the zonal SST gradient. We conclude that the relationship between meridional and zonal variability in the eastern Indian Ocean is non-stationary and influenced by long-term temperature trends.
Shallow-water temperature seasonality in the middle Cretaceous mid-latitude northwestern Pacific Peer-reviewed

Shunta Ichimura, Hideko Takayanagi, Yasufumi Iryu, Satoshi Takahashi, Tatsuo Oji

Frontiers in Marine Science　11　2024/04/02
Publisher: Frontiers Media SA
DOI： 10.3389/fmars.2024.1324436 　

eISSN： 2296-7745

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Temperature seasonality during the middle Cretaceous provides vital information about climate dynamics and ecological traits of organisms under the conditions of the “supergreenhouse” Earth. However, sub-annual scale paleotemperature records in the mid-latitude region remain limited. In this study, sclerochronological and stable oxygen isotope (δ¹⁸O) analyses of bivalve fossils from the northwestern Pacific (paleolatitude: 44°N) were used to estimate their life history and sub-annual scale temperature patterns of the middle Cretaceous. The materials studied included Cucullaea (Idonearca) delicatostriata and Aphrodina pseudoplana recovered from middle Turonian (middle Cretaceous) shallow marine deposits in Hokkaido, northern Japan. Growth increment width and shell δ¹⁸O of C. (I.) delicatostriata revealed that the growth rate was temporally maximized and then minimized, which can be interpreted as representing spring and winter growth, respectively. Approximately 25 fortnightly growth increments occurred within that cycle, suggesting that shell formation proceeded continuously throughout the year. Based on shell δ¹⁸O values, shallow-water temperatures from 28°C to 35°C with 7°C seasonality were estimated, under the assumption that seawater δ¹⁸O values were annually invariant at −1‰ relative to VSMOW. This temperature seasonality in the middle Cretaceous is more than 5°C smaller than the seasonality of modern shallow-water environments at the same latitudes. These findings, taken together with previous studies of other oceanic regions, suggest that the Northern Hemisphere had low seasonal shallow-water temperature variation of up to 10°C in the middle Cretaceous.
Hydrogen and oxygen isotope compositions of bottom waters collected around off southwestern Tokara Islands Peer-reviewed

Kazuma OIKAWA, Toshihiro MIYAJIMA, Hideko TAKAYANAGI, Yasufumi IRYU

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN　74　(5-6)　329-336　2023/12/28
Publisher: National Institute of Advanced Industrial Science
DOI： 10.9795/bullgsj.74.5-6_329 　

ISSN： 1346-4272

eISSN： 2186-490X
Multidecadal-to-interannual modulations of Late Holocene climate variations reconstructed from oxygen isotope ratios of a 237-year-long lived fossil coral in Kikai Island, southwestern Japan International-journal Peer-reviewed

Ko-Yuan Chuang, Ryuji Asami, Hideko Takayanagi, Maki Morimoto, Osamu Abe, Toru Nakamori, Yasufumi Iryu

Quaternary Science Reviews　322　(108392)　2023/11/11
Publisher: Elsevier
DOI： 10.1016/j.quascirev.2023.108392 　
Progressive carbonation and Ca-metasomatism of serpentinized ultramafic rocks: insights from natural occurrences and hydrothermal experiments International-journal Peer-reviewed

Amarbayar, N., D, ar, O., Wang, J., Okamoto, A., Uno, M., Batsaikhan, U., Takayanagi, H., Iryu, Y., Tsuchiya, N.

Contributions to Mineralogy and Petrology　178　(7)　2023/07
Publisher: SpringerNature
DOI： 10.1007/s00410-023-02013-z 　

ISSN： 1432-0967 0010-7999
Uplift rate of Kitadaito Jima Island on the lithospheric forebulge of the Philippine Sea Plate Peer-reviewed

Yasufumi Iryu, Hideko Takayanagi, Tsuyoshi Ishikawa, Akimasa Ishigaki, Takuji Asanuma, Rin Teruya, David A. Budd

Progress in Earth and Planetary Science　10　(1)　2023/01/18
Publisher: Springer Science and Business Media LLC
DOI： 10.1186/s40645-023-00535-5 　

eISSN： 2197-4284

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Abstract Estimates of uplift rates for lithospheric forebulges are needed to understand exact plate motions at plate convergence zones and to delineate the fate of coral reefs atop the forebulges. A carbonate island on a lithospheric forebulge can provide excellent materials for estimating uplift rate because carbonate sediments can be dated and their paleo-water depth determined. We estimated the uplift rate of Kitadaito Jima Island, a carbonate island on the lithospheric forebulge of the Philippine Sea Plate that is subducting beneath the Eurasian Plate. Marine skeletal sands containing pebble-sized bioclasts and filling the concavity of an intertidal erosional notch at an elevation of ~ 71 m were found near the top of this island. Strontium isotope ages ranging from 1.78 to 2.01 Ma with an average of 1.89 Ma (standard deviation = 0.07 Ma) were obtained from these deposits. As global sea level at 1.89 Ma was ~ 21 m lower than the present, the mean uplift rate was estimated at ~ 49 m/million years (Myr) with a compounded uncertainty of ± 2.6 m/Myr. This rate is comparable to, or up to ~ 140 m/Myr less than, rates reported from other Indo-Pacific carbonate islands in similar tectonic settings. This study illustrates how contemporary Sr isotope age models and careful considerations of limestone sample depositional depths can yield more accurate and precise uplift rates of modern forearc bulges than possible in many older studies.
Topography, sedimentology, and biochronology of carbonate deposits on seamounts in the JA area, northwestern Pacific Ocean Peer-reviewed

Yasufumi Iryu, Hikari Hino, Hideko Takayanagi, Tokiyuki Sato, Nobuyuki Okamoto, Akiko Suzuki, Yuho Fujimaki, Akira Usui

Island Arc　IAR12501　2023/01
Publisher: Wiley
DOI： 10.1111/iar.12501 　
Coral Sr/Ca records provide realistic representation of eastern Indian Ocean cooling during extreme positive Indian Ocean Dipole events Peer-reviewed

Pfeiffer, M., Watanabe, T.K., Takayanagi, H., Cahyarini, S.Y., Garbe-Sch{\"o}nberg, D., Watanabe, T.

Scientific Reports　12　(1)　2022/12
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-022-14617-9 　

ISSN： 2045-2322

eISSN： 2045-2322
The pteropod species Heliconoides inflatus as an archive of late Pleistocene to Holocene environmental conditions on the Northwest Shelf of Australia International-coauthorship Peer-reviewed

Hallenberger, M., Reuning, L., Takayanagi, H., Iryu, Y., Keul, N., Ishiwa, T., Yokoyama, Y.

Progress in Earth and Planetary Science　9　(1)　2022/10/01

DOI： 10.1186/s40645-022-00507-1 　

ISSN： 2197-4284
Characterization of water masses around the southern Ryukyu Islands based on isotopic compositions Peer-reviewed

Andros Daniel Cruz Salmeron, Hideko Takayanagi, Shigeyuki Wakaki, Tsuyoshi Ishikawa, Toshihiro Miyajima, Hitomi Wakaki, Takuya Itaki, Yasufumi Iryu

Progress in Earth and Planetary Science　9　(1)　2022/08/17
Publisher: Springer Science and Business Media LLC
DOI： 10.1186/s40645-022-00503-5 　

eISSN： 2197-4284

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Abstract We investigated the water-mass structure on the Okinawa Trough and Pacific sides of the southern Ryukyu Island Arc (Yonaguni, Iriomote, and Ishigaki subareas) using the Nd isotope composition (¹⁴³Nd/¹⁴⁴Nd ratios; expressed as εNd values) of benthic foraminiferal tests in surface sediments, which reflect bottom-water composition, along with hydrogen and oxygen isotope compositions (δD and δ¹⁸O values, respectively) and physical properties (temperature and salinity) of seawater. The Okinawa Trough side has lower εNd values than the Pacific side due to continental/island material inputs characterized by relatively low εNd values. Moreover, within the Okinawa Trough, other processes control the Nd behavior of seawater and primarily affect the Yonaguni and Iriomote subareas, as follows. (1) Surface and subsurface waters are influenced by Taiwanese river discharge combined with temporospatial variations in oceanographic conditions including Kuroshio Current meandering. (2) Intermediate water is characterized by low εNd values (down to − 8.2), possibly attributable to sediment plumes and turbiditic fluxes. (3) The εNd values of bottom water indicate upwelling and vertical mixing, with composition therefore being similar to those of intermediate water. The εNd profiles are better defined on the Pacific side. High εNd values occur in surface and subsurface (< 300 m depth, potential density < 25.0 kg m⁻³) waters, and low values (down to − 7.0) occur in subsurface–core-intermediate water (400–600 m depth, 26–27 kg m⁻³). εNd values increase slightly to − 4.0 below 750 m depth and remain constant down to about 2000 m depth, below which deep water shows a slight decrease in εNd values. Intermediate and bottom/deep waters are distinguished from upper layers by their lower δD and δ¹⁸O values.
Contrasting intensity of aragonite dissolution and dolomite cementation in glacial versus interglacial intervals of a subtropical carbonate succession Peer-reviewed

Lars Reuning, Hanaa Deik, Benjamin Petrick, Gerald Auer, Hideko Takayanagi, Yasufumi Iryu, Margot Courtillat, Maria‐Angela Bassetti

Sedimentology　2022/02/17
Publisher: Wiley
DOI： 10.1111/sed.12985 　

ISSN： 0037-0746

eISSN： 1365-3091
Biostratigraphical and palaeobiogeographical patterns of the larger porcelaneous foraminifer Austrotrillina Parr, 1942 Peer-reviewed

Bassi, D., Aftabuzzaman, M., Bolivar-Feriche, M., Braga, J.C., Aguirre, J., Renema, W., Takayanagi, H., Iryu, Y.

Marine Micropaleontology　169　102058-102058　2021/12
Publisher: Elsevier BV
DOI： 10.1016/j.marmicro.2021.102058 　

ISSN： 0377-8398
Last glacial temperature reconstructions using coupled isotopic analyses of fossil snails and stalagmites from archaeological caves in Okinawa, Japan Peer-reviewed

Ryuji Asami, Rikuto Hondo, Ryu Uemura, Masaki Fujita, Shinji Yamasaki, Chuan-Chou Shen, Chung-Che Wu, Xiuyang Jiang, Hideko Takayanagi, Ryuichi Shinjo, Akihiro Kano, Yasufumi Iryu

Scientific Reports　11　(1)　2021/12
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-021-01484-z 　

eISSN： 2045-2322

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Abstract We applied a new geoarchaeological method with two carbonate archives, which are fossil snails from Sakitari Cave and stalagmites from Gyokusen Cave, on Okinawa Island, Japan, to reconstruct surface air temperature changes over the northwestern Pacific since the last glacial period. Oxygen isotope ratios (δ¹⁸O) of modern and fossil freshwater snail shells were determined to infer seasonal temperature variations. The observational and analytical data confirm that δ¹⁸O values of fluid inclusion waters in the stalagmite can be regarded as those of spring waters at the sites where snails lived. Our results indicate that the annual mean, summer, and winter air temperatures were lower by 6–7 °C at ca. 23 thousand years ago (ka) and 4–5 °C at ca. 16–13 ka than those of the present day. Our reconstruction implies that surface air cooling was possibly two times greater than that of seawater around the Ryukyu Islands during the Last Glacial Maximum, which potentially enhanced the development of the East Asian summer monsoon during the last deglaciation. Considering the potential uncertainties in the temperature estimations, the climatic interpretations of this study are not necessarily definitive due to the limited number of samples. Nevertheless, our new geoarchaeological approach using coupled δ¹⁸O determinations of fossil snails and stalagmite fluid inclusion waters will be useful for reconstructing snapshots of seasonally resolved time series of air temperatures during the Quaternary.
Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly Peer-reviewed

Cahyarini, S.Y., Pfeiffer, M., Reuning, L., Liebetrau, V., Dullo, W.-C., Takayanagi, H., Anwar, I.P., Utami, D.A., Garbe-Sch{\"o}nberg, D., Hendrizan, M., Eisenhauer, A.

Scientific Reports　11　(1)　2021/12
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-021-94465-1 　

ISSN： 2045-2322

eISSN： 2045-2322
Intensified organic carbon burial on the Australian shelf after the Middle Pleistocene transition Peer-reviewed

Auer, G., Petrick, B., Yoshimura, T., Mamo, B.L., Reuning, L., Takayanagi, H., De Vleeschouwer, D., Martinez-Garcia, A.

Quaternary Science Reviews　262　106965-106965　2021/06
Publisher: Elsevier BV
DOI： 10.1016/j.quascirev.2021.106965 　

ISSN： 0277-3791
Quantitative compaction trends of Miocene to Holocene carbonates off the west coast of Australia Peer-reviewed

E. Y. Lee, M. Kominz, L. Reuning, S. J. Gallagher, H. Takayanagi, T. Ishiwa, W. Knierzinger, M. Wagreich

Australian Journal of Earth Sciences　68　(8)　1-13　2021/05/20
Publisher: Informa UK Limited
DOI： 10.1080/08120099.2021.1915867 　

ISSN： 0812-0099

eISSN： 1440-0952
Multi-approach characterization of shallow-water carbonates off minamitorishima and their depositional settings/history Peer-reviewed

Aftabuzzaman, M., Yomogida, K., Suzuki, S., Takayanagi, H., Ishigaki, A., Machida, S., Asahara, Y., Yamamoto, K., Hirano, N., Sano, S.-I., Chiyonobu, S., Bassi, D., Iryu, Y.

Island Arc　30　(1)　2021/01
Publisher: Wiley
DOI： 10.1111/iar.12400 　

ISSN： 1440-1738 1038-4871

eISSN： 1440-1738
Spathian to aegean (Upper lower triassic to lower middle triassic) carbon isotope stratigraphy constrained by the conodont biostratigraphy of carbonates on top of a mid-oceanic seamount formed in the panthalassic ocean Peer-reviewed

Ha, T.T.N., Maekawa, T., Takayanagi, H., Iryu, Y.

Island Arc　30　(1)　2021/01
Publisher: Wiley
DOI： 10.1111/iar.12391 　

ISSN： 1440-1738 1038-4871

eISSN： 1440-1738
The δ¹³c–δ¹⁸ o variations in marble in the hida belt, Japan Peer-reviewed

Harada, H., Tsujimori, T., Kunugiza, K., Yamashita, K., Aoki, S., Aoki, K., Takayanagi, H., Iryu, Y.

Island Arc　30　(1)　2021/01
Publisher: Wiley
DOI： 10.1111/iar.12389 　

ISSN： 1440-1738 1038-4871

eISSN： 1440-1738
Boring bivalve traces in modern reef and deeper-water macroid and rhodolith beds Peer-reviewed

Davide Bassi, Juan C. Braga, Masato Owada, Julio Aguirre, Jere H. Lipps, Hideko Takayanagi, Yasufumi Iryu

Progress in Earth and Planetary Science　7　(1)　2020/12
Publisher: Springer Science and Business Media LLC
DOI： 10.1186/s40645-020-00356-w 　

eISSN： 2197-4284

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<title>Abstract</title>Macroids and rhodoliths, made by encrusting acervulinid foraminifera and coralline algae, are widely recognized as bioengineers providing relatively stable microhabitats and increasing biodiversity for other species. Macroid and rhodolith beds occur in different depositional settings at various localities and bathymetries worldwide. Six case studies of macroid/rhodolith beds from 0 to 117 m water depth in the Pacific Ocean (northern Central Ryukyu Islands, French Polynesia), eastern Australia (Fraser Island, One Tree Reef, Lizard Island), and the Mediterranean Sea (southeastern Spain) show that nodules in the beds are perforated by small-sized boring bivalve traces (<italic>Gastrochaenolites</italic>). On average, boring bivalve shells (gastrochaenids and mytilids) are more slender and smaller than those living inside shallow-water rocky substrates. In the Pacific, <italic>Gastrochaena cuneiformis</italic>, <italic>Gastrochaena</italic> sp., <italic>Leiosolenus malaccanus</italic>, <italic>L. mucronatus</italic>, <italic>L</italic>. spp., and <italic>Lithophaga</italic>/<italic>Leiosolenus</italic> sp., for the first time identified below 20 m water depth, occur as juvenile forms along with rare small-sized adults. In deep-water macroids and rhodoliths the boring bivalves are larger than the shallower counterparts in which growth of juveniles is probably restrained by higher overturn rates of host nodules. In general, most boring bivalves are juveniles that grew faster than the acervulinid foraminiferal and coralline red algal hosts and rarely reached the adult stage. As a consequence of phenotypic plasticity, small-sized adults with slow growth rates coexist with juveniles. Below wave base macroids and rhodoliths had the highest amounts of bioerosion, mainly produced by sponges and polychaete worms. These modern observations provide bases for paleobiological inferences in fossil occurrences.
Deuterium and oxygen isotope composition of bottom-seawater samples collected around Yaeyama Islands

Takayanagi, H., Miyajima, T.:, Fujioka, H., Nishio, T., Iryu, Y.

Marine Geological and Geophysical Studies around Okinawa Islands – around of Ishikaki, Iriomote and Yonaguni Islands–; Preliminary Reports on Researches in Fiscal Year 2019　94-102　2020/02
Tectonic implications of carbonate deposits on the eastern slope of the Hahajima Seamount in the collision zone between the Izu–Bonin Arc on the Philippine Sea Plate and the Ogasawara Plateau on the Pacific Plate Peer-reviewed

Jun Miyata, Hideko Takayanagi, Akimasa Ishigaki, Naoto Hirano, Satoshi Shiokawa, Akira Nishimura, Tsutomu Nakazawa, Tsuyoshi Ishikawa, Kazuya Nagaishi, Hidekazu Tokuyama, Akira Ishiwatari, Yasufumi Iryu

Island Arc　29　(1)　2020/01

DOI： 10.1111/iar.12368 　

ISSN： 1038-4871

eISSN： 1440-1738
Carbon and oxygen isotope records of Tridacna squamosa shells from two different latitudes in the Ryukyu Islands Peer-reviewed

Kodama, S, Takayanagi, H, Yoshii, K., Ha, T. T. N., Asami, R., Abe, O., Iryu, Y.

Paleontological Research　25　(2)　2020
Publisher: The Paleontological Society of Japan
DOI： 10.2517/2020PR003 　

ISSN： 1342-8144
Glacial Indonesian Throughflow weakening across the Mid-Pleistocene Climatic Transition Peer-reviewed

Petrick, B., Mart{\'i}nez-Garc{\'i}a, A., Auer, G., Reuning, L., Auderset, A., Deik, H., Takayanagi, H., De Vleeschouwer, D., Iryu, Y., Haug, G.H.

Scientific Reports　9　(1)　2019/11

DOI： 10.1038/s41598-019-53382-0 　

ISSN： 2045-2322
Litho-, bio-, and chemostratigraphy of the Middle Triassic carbonate succession in the North-Central Coast Region of Vietnam Peer-reviewed

Thuy Thi Nhu Ha, Hideko Takayanagi, Katsumi Ueno, Yoshihiro Asahara, Koshi Yamamoto, Yasufumi Iryu

PROGRESS IN EARTH AND PLANETARY SCIENCE　6　47　2019/07

DOI： 10.1186/s40645-019-0293-y 　

ISSN： 2197-4284
The effects of meteoric diagenesis on the geochemical composition and microstructure of Pliocene fossil Terebratalia coreanica and Laqueus rubellus brachiopod shells from northeastern Japan Peer-reviewed

Fujioka, H., Takayanagi, H., Yamamoto, K., Iryu, Y.

Progress in Earth and Planetary Science　6　(1)　45　2019/06

DOI： 10.1186/s40645-019-0289-7 　

ISSN： 2197-4284
The modification of microstructure and geochemical composition of fossil brachiopod shells by meteoric diagenesis

Fujioka, H, Takayanagi, H, Yamamoto, K, Iryu, Y

Chikyu Monthly　2019/05
Understanding seasonality and evapotranspiration of soil water under tree and grass cover using natural isotopes Peer-reviewed

Podobed, D, Komori, D, Yoshimura, K, Tanoue, M, Takayanagi, H, Iryu, Y, Hirano, S, Otsuki, Y

Agricultural Meteorology in Tohoku　63　19-21　2019/03
Hardened faecal pellets as a significant component in deep water, subtropical marine environments Peer-reviewed

Deik, H., Reuning, L., Petrick, B., Takayanagi, H.

Depositional Record　5　(2)　348-361　2019/02

DOI： 10.1002/dep2.64 　

ISSN： 2055-4877
The enigma of rare Quaternary oolites in the Indian and Pacific Oceans: A result of global oceanographic physicochemical conditions or a sampling bias? Peer-reviewed

Gallagher, S. J, Reuning, L, Himmler, T, Henderiks, J, De Vleeschouwer, D, Groeneveld, J, Rastiaar Lari, A, Fulthorpe, C. S, Bogus, K, Expedition, Shipboard Scientists

Quaternary Science Reviews　200　114-122　2018/11
Publisher: Elsevier BV
DOI： 10.1016/j.quascirev.2018.09.028 　

ISSN： 0277-3791
Penetrative trace fossils from the late ediacaran of mongolia: Early onset of the agronomic revolution Peer-reviewed

Tatsuo Oji, Stephen Q. Dornbos, Keigo Yada, Hitoshi Hasegawa, Sersmaa Gonchigdorj, Takafumi Mochizuki, Hideko Takayanagi, Yasufumi Iryu

Royal Society Open Science　5　(2)　2018/02/01
Publisher: Royal Society Publishing
DOI： 10.1098/rsos.172250 　

ISSN： 2054-5703
Geochemical, petrographical, and petrophysical evaluations of a heterogeneous, stratiform dolomite from a Barremian oil field, offshore Abu Dhabi (United Arab Emirates) Peer-reviewed

Kazuyuki Yamamoto, Gary Ottinger, Osama Al Zinati, Hideko Takayanagi, Koshi Yamamoto, Yasufumi Iryu

AAPG BULLETIN　102　(1)　129-152　2018/01

DOI： 10.1306/0327171524717016 　

ISSN： 0149-1423

eISSN： 1558-9153
Nonlinear relationship between preservation of microstructure and geochemical composition of Pleistocene brachiopod shells from the Ryukyu Islands, southwestern Japan Peer-reviewed

Kazuyuki Yamamoto, Mamoru Takizawa, Hideko Takayanagi, Ryuji Asami, Yasufumi Iryu

ISLAND ARC　26　(6)　2017/11

DOI： 10.1111/iar.12217 　

ISSN： 1038-4871

eISSN： 1440-1738
Paleoceanographic conditions at approximately 20 and 70 ka recorded in Kikaithyris hanzawai (Brachiopoda) shells Peer-reviewed

Mamoru Takizawa, Hideko Takayanagi, Koshi Yamamoto, Osamu Abe, Keiichi Sasaki, Yasufumi Iryu

GEOCHIMICA ET COSMOCHIMICA ACTA　215　189-213　2017/10

DOI： 10.1016/j.gca.2017.08.002 　

ISSN： 0016-7037

eISSN： 1872-9533
Indonesian Throughflow drove Australian climate from humid Pliocene to arid Pleistocene Peer-reviewed

Beth A. Christensen, Willem Renema, Jorijntje Henderiks, David De Vleeschouwer, Jeroen Groeneveld, Isla S. Castaneda, Lars Reuning, Kara Bogus, Gerald Auer, Takeshige Ishiwa, Cecilia M. McHugh, Stephen J. Gallagher, Craig S. Fulthorpe

GEOPHYSICAL RESEARCH LETTERS　44　(13)　6914-6925　2017/07

DOI： 10.1002/2017GL072977 　

ISSN： 0094-8276

eISSN： 1944-8007
Australian shelf sediments reveal shifts in Miocene Southern Hemisphere westerlies Peer-reviewed

Jeroen Groeneveld, Jorijntje Henderiks, Willem Renema, Cecilia M. McHugh, David De Vleeschouwer, Beth A. Christensen, Craig S. Fulthorpe, Lars Reuning, Stephen J. Gallagher, Kara Bogus, Gerald Auer, Takeshige Ishiwa

SCIENCE ADVANCES　3　(5)　2017/05

DOI： 10.1126/sciadv.1602567 　

ISSN： 2375-2548
Upper Albian-upper Turonian calcareous nannofossil biostratigraphy and chemostratigraphy in the Vocontian Basin, southeastern France Peer-reviewed

Babu Ram Gyawali, Hiroshi Nishi, Reishi Takashima, Jens O. Herrle, Hideko Takayanagi, Jean-Louis Latil, Yasufumi Iryu

NEWSLETTERS ON STRATIGRAPHY　50　(2)　111-139　2017/04

DOI： 10.1127/nos/2016/0339 　

ISSN： 0078-0421
Quantifying K, U, and Th contents of marine sediments using shipboard natural gamma radiation spectra measured on DV JOIDES Resolution Peer-reviewed

David De Vleeschouwer, Ann G. Dunlea, Gerald Auer, Chloe H. Anderson, Hans Brumsack, Aaron de Loach, Michael Gurnis, Youngsook Huh, Takeshige Ishiwa, Kwangchul Jang, Michelle A. Kominz, Christian Marz, Bernhard Schnetger, Richard W. Murray, Heiko Paelike

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS　18　(3)　1053-1064　2017/03

DOI： 10.1002/2016GC006715 　

ISSN： 1525-2027
アラビア湾南岸に分布するバレミアン階炭酸塩岩の炭素同位体層序

水島大輔, 高柳栄子, 石田圭史郎, 淺原良浩, 山本鋼志, 佐藤時幸, 井龍康文

石油技術協会誌　81　(4)　322‐323　2016/07

ISSN： 0370-9868
ドロマイトの成因論に基づく高解像度貯留層キャラクタリゼーション―アブダビ沖巨大油田の事例―

山本和幸, 山本和幸, OTTINGER Gary, AL‐ZINATI Osama, 高柳栄子, 山本鋼志, 井龍康文

石油技術協会誌　81　(4)　324　2016/07

ISSN： 0370-9868
Changes in the depth habitat of the Oligocene planktic foraminifera (Dentoglobigerina venezuelana) induced by thermocline deepening in the eastern equatorial Pacific Peer-reviewed

Hiroki Matsui, Hiroshi Nishi, Reishi Takashima, Azumi Kuroyanagi, Minoru Ikehara, Hideko Takayanagi, Yasufumi Iryu

PALEOCEANOGRAPHY　31　(6)　715-731　2016/06

DOI： 10.1002/2016PA002950 　

ISSN： 0883-8305

eISSN： 1944-9186
Carbon and Oxygen Isotope Records from Tridacna derasa Shells: Toward Establishing a Reliable Proxy for Sea Surface Environments Peer-reviewed

Junpei Yamanashi, Hideko Takayanagi, Ayaka Isaji, Ryuji Asami, Yasufumi Iryu

PLOS ONE　11　(6)　e0157659　2016/06

DOI： 10.1371/journal.pone.0157659 　

ISSN： 1932-6203
How do we select pristine brachiopods shells? Invited

Takizawa, M, Takayanagi, H, Yamamoto, K, Sasaki, K, Iryu, Y

Kaiyo monthly　56　(56)　27-35　2016/05
Publisher:
ISSN： 0916-8575
A newly discovered submerged reef on the Miyako-Sone platform, Ryukyu Island Arc, Northwestern Pacific Peer-reviewed

Kohsaku Arai, Hiroki Matsuda, Keiichi Sasaki, Hideaki Machiyama, Takeshi Yamaguchi, Takahiko Inoue, Taichi Sato, Hideko Takayanagi, Yasufumi Iryu

MARINE GEOLOGY　373　49-54　2016/03

DOI： 10.1016/j.margeo.2016.01.007 　

ISSN： 0025-3227

eISSN： 1872-6151
A Causal Link Between Paleoenvironmental Dynamics and Borehole Instability in a Cenomanian Carbonate Reservoir, Offshore Abu Dhabi Peer-reviewed

Yamamoto, K, Obara, H, Tsusaka, K, Tsuji, Y, Al-Farhan, Z. A, Aljneibi, M. M, Takayanagi, H, Kurita, H, Sato, T, Iryu, Y

Abu Dhabi International Petroleum Exhibition & Conference. Society of Petroleum Engineers　2016

DOI： 10.2118/183194-MS 　
Quantitative analysis of intraspecific variations in the carbon and oxygen isotope compositions of the modern cool-temperate brachiopod Terebratulina crossei Peer-reviewed

Hideko Takayanagi, Ryuji Asami, Tsuguo Otake, Osamu Abe, Toshihiro Miyajima, Hiroyuki Kitagawa, Yasufumi Iryu

GEOCHIMICA ET COSMOCHIMICA ACTA　170　301-320　2015/12

DOI： 10.1016/j.gca.2015.08.006 　

ISSN： 0016-7037

eISSN： 1872-9533
Carbonate sedimentation in seagrass beds on Ishigaki-jima, Ryukyu Islands, southwestern Japan Peer-reviewed

Keita Fujita, Ryuji Asami, Hideko Takayanagi, Yasufumi Iryu

ISLAND ARC　24　(2)　263-279　2015/06

DOI： 10.1111/iar.12112 　

ISSN： 1038-4871

eISSN： 1440-1738
Reply to the comment by Granier on "Early Aptian paleoenvironmental evolution of the Bab Basin at the southern Neo-Tethys margin: Response to global carbon-cycle perturbations across Ocean Anoxic Event 1a" Peer-reviewed

Kazuyuki Yamamoto, Masatoshi Ishibashi, Hideko Takayanagi, Yoshihiro Asahara, Tokiyuki Sato, Hiroshi Nishi, Yasufumi Iryu

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS　15　(5)　2091-2094　2014/05

DOI： 10.1002/2014GC005390 　

ISSN： 1525-2027
ICDP掘削で取り組むべき炭酸塩堆積学・地球化学上の問題

井龍康文, 高柳栄子

月刊地球　36　(2)　73-78　2014
Publisher:
ISSN： 0387-3498
Development of the Aptian carbonate platforms in the southern Arabian Gulf region; Implications for petroleum geology Peer-reviewed

Yamamoto, K, Ishibashi, T, Takayanagi, H, Iryu, Y

地質学雑誌　2014

DOI： 10.5575/geosoc.2013.0046 　
Intraspecific variations in carbon-isotope and oxygen-isotope compositions of a brachiopod Basiliola lucida collected off Okinawa-jima, southwestern Japan Peer-reviewed

Hideko Takayanagi, Ryuji Asami, Osamu Abe, Toshihiro Miyajima, Hiroyuki Kitagawa, Keiichi Sasaki, Yasufumi Iryu

GEOCHIMICA ET COSMOCHIMICA ACTA　115　115-136　2013/08

DOI： 10.1016/j.gca.2013.03.026 　

ISSN： 0016-7037
Sedimentary facies and biofacies of the Torinosu Limestone in the Torinosu area, Kochi Prefecture, Japan Peer-reviewed

Hiromichi Ohga, Boguslaw Kolodziej, Martin Nose, Dieter U. Schmid, Hideko Takayanagi, Yasufumi Iryu

ISLAND ARC　22　(2)　150-169　2013/06

DOI： 10.1111/iar.12009 　

ISSN： 1038-4871

eISSN： 1440-1738
Early Aptian paleoenvironmental evolution of the Bab Basin at the southern Neo-Tethys margin: Response to global carbon-cycle perturbations across Ocean Anoxic Event 1a Peer-reviewed

Kazuyuki Yamamoto, Masatoshi Ishibashi, Hideko Takayanagi, Yoshihiro Asahara, Tokiyuki Sato, Hiroshi Nishi, Yasufumi Iryu

Geochemistry, Geophysics, Geosystems　14　(4)　1104-1130　2013/04/01
Publisher: Blackwell Publishing Ltd
DOI： 10.1002/ggge.20083 　

ISSN： 1525-2027
Carbon-isotope composition of brachiopod shells as paleoenvironmental proxy

Takayanagi, H, Asami, R, Iryu, Y

月刊地球　35　(12)　690-696　2013
Publisher:
ISSN： 0387-3498
Bathymetric distribution of ichnocoenoses from recent subtropical algal nodules off Fraser Island, eastern Australia Peer-reviewed

Davide Bassi, Yasufumi Iryu, Juan C. Braga, Hideko Takayanagi, Yoshihiro Tsuji

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY　369　58-66　2013/01

DOI： 10.1016/j.palaeo.2012.10.003 　

ISSN： 0031-0182
Stratigraphy of the Ryukyu Group and the Chinen Formation in southern Okinawa-jima, Ryukyu Islands, Japan Peer-reviewed

Sagae, K, Marc, H, Odawara, K, Chiyonobu, S, Sato, T, Kabamoto, J, Takayanagi, H, Iryu, Y

The Journal of the Geological Society of Japan　118　(2)　117-136　2012
Publisher: The Geological Society of Japan
DOI： 10.5575/geosoc.2011.0009 　

ISSN： 0016-7630

More details Close

The Pleistocene Ryukyu Group, composed of reef-complex deposits, crops out in southern Okinawa-jima, Ryukyu Islands, southwestern Japan. Here, based on new investigations, we revise the previous stratigraphic scheme for the Ryukyu Group and provide a formal stratigraphic description. In the study area, the Ryukyu Group comprises the Itoman, Naha, and Minatogawa formations. The Itoman Formation, composed mainly of coralline algal limestone, is thin (>2 m thick) and sporadically distributed. The Naha Formation rests unconformably on the Itoman Formation, reaches 50 m in thickness, and is exposed at elevations of up to ca. 170 m. The Naha Formation is divisible into four units; each unit is composed of coral limestone overlain by rhodolith, Cycloclypeus—Operculina, and detrital limestones, showing a deepening-upward sequence. The contact between the upper two units (units 3 and 4) is unconformable; this unconformity is present in other areas in Okinawa-jima, such as Yomitan, the Motobu Peninsula, and Ie-jima. Calcareous nannofossil assemblages indicate that deposition of the Naha Formation began at 1.392—1.706 Ma, and continued until after 0.853 Ma. The Itoman Formation and the lowest interval of the Naha Formation are coeval, and they represent, respectively, reef and off-reef facies of reef-complex deposits. The Minatogawa Formation rests unconformably on the Naha Formation, reaches 20 m in thickness, and consists of well-sorted detrital and coral limestones that are thought to have been deposited in a shallow lagoon (moat); its surface exposure is confined to elevations of less than 50 m. The geologic age of the Minatogawa Formation is unknown at this time.
Temporal changes in biotic and abiotic composition of shallow-water carbonates on submerged seamounts in the northwestern Pacific Ocean and their controlling factors Peer-reviewed

Hideko Takayanagi, Yasufumi Iryu, Motoyoshi Oda, Tokiyuki Sato, Shun Chiyonobu, Akira Nishimura, Tsutomu Nakazawa, Tsuyoshi Ishikawa, Kazuya Nagaishi

GEODIVERSITAS　34　(1)　189-217　2012

DOI： 10.5252/g2012n1a11 　

ISSN： 1280-9659

eISSN： 1638-9395
顕生代における海水の炭素・酸素同位体組成変動全解明

井龍康文, 高柳栄子

月刊地球　44　225-263　2012
Recent ichnocoenosis in deep-water rhodoliths collected from the insular shelf west of Okinawa-jima, Ryukyu Islands, Japan

Takayanagi, H, Bassi, D, Iryu, Y

沖縄周辺海域の海洋地質学的研究平成23年度研究概要報告書．産業技術総合研究所地質調査総合センター（つくば）速報　2012
Carbon- and oxygen-isotope compositions of a modern deep-water brachiopod Campagea japonica collected off Aguni-jima, Central Ryukyu Islands, southwestern Japan Peer-reviewed

Hideko Takayanagi, Ryuji Asami, Osamu Abe, Hiroyuki Kitagawa, Toshihiro Miyajima, Yasufumi Iryu

GEOCHEMICAL JOURNAL　46　(2)　77-87　2012

DOI： 10.2343/geochemj.1.0153 　

ISSN： 0016-7002

eISSN： 1880-5973
Carbon and oxygen isotope compositions of a living deep-water brachiopod (Campagea japonica) shell collected off Aguni-jima, Ryukyu Islands, Japan

高柳栄子, 浅海竜司, 井龍康文

沖縄周辺海域の海洋地質学的研究平成22年度研究概要報告書―沖縄島西方沖海域―．産業技術総合研究所地質調査総合センター（つくば）速報　55　187-193　2011
Stable isotope compositions of a giant clam (Tridacna maxima) in Micronesia Peer-reviewed

Hwang, T. H, Woo, K. S, Park, H. S, Iryu, Y, Takayanagi, H

Journal of the Geological Society of Korea　47　(5)　561-567　2011
Philippine Sea Plate motion since the Eocene estimated from paleomagnetism of seafloor drill cores and gravity cores Peer-reviewed

Toshitsugu Yamazaki, Masaki Takahashi, Yasufumi Iryu, Tokiyuki Sato, Motoyoshi Oda, Hideko Takayanagi, Shun Chiyonobu, Akira Nishimura, Tsutomu Nakazawa, Takashi Ooka

EARTH PLANETS AND SPACE　62　(6)　495-502　2010

DOI： 10.5047/eps.2010.04.001 　

ISSN： 1343-8832
Sr isotope composition of island-surface dolomites at Kita-daito-jima, northern Philippine Sea Peer-reviewed

Takayanagi, H, Nakayama, Y, Ishikawa, T, Nagaishi, K, Iryu, Y

The Journal of the Geological Society of Japan　116　(4)　237-240　2010
Publisher: The Geological Society of Japan
DOI： 10.5575/geosoc.116.237 　

ISSN： 0016-7630

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We present strontium (Sr) isotope data for island-surface dolomites at Kita-daito-jima, northern Philippine Sea. The ⁸⁷Sr/⁸⁶Sr ratios of 50 samples fall within a wide range from 0.709037 to 0.709079, corresponding to 4.9-2.1 Ma. This wide range in Sr ages reflects the fact that the island-surface dolomites comprise variable mixtures of geochemically distinct, diachronous, dolomite crystal phases. Our results indicate that the Sr isotope ages of multi-generational dolomites on carbonate islands such as Niue and Little Bahama Bank, as well as Kita-daito-jima, should be re-examined employing a new method that determines the Sr isotope ratio of individual crystal phases.
堆積学スクール2009「第四紀サンゴ礁堆積物の層序，堆積相，化石相」（2009年8月，沖縄）参加報告

高柳栄子

堆積学研究　68　(2)　143-146　2010
Publisher:
ISSN： 1342-310X
沖縄本島西方海域より採水した底層水の炭素・酸素同位体組成

高柳栄子, 阿部理, 浅海竜司, 井龍康文

沖縄周辺海域の海洋地質学的研究平成21年度研究概要報告書―沖縄島北西方沖海域―．産業技術総合研究所地質調査総合センター（つくば）　51　86-92　2010
沖縄本島西方海域より採取された石灰藻球（予報）

Iryu, Y, Takayanagi, H, Kawamura, K

沖縄周辺海域の海洋地質学的研究平成20年度研究概要報告書―沖縄島東方沖海域―．産業技術総合研究所地質調査総合センター（つくば）　46　158-163　2009
Carbonate deposits on submerged seamounts in the northwestern Pacific Ocean Peer-reviewed

Hideko Takayanagi, Yasufumi Iryu, Tsutomu Yamada, Motoyoshi Oda, Kazuyuki Yamamoto, Tokiyuki Sato, Shun Chiyonobu, Akira Nishimura, Tsutomu Nakazawa, Satoshi Shiokawa

ISLAND ARC　16　(3)　394-419　2007/09

DOI： 10.1111/j.1440-1738.2007.00595.x 　

ISSN： 1038-4871

eISSN： 1440-1738
Upper Cretaceous to Pleistocene shallow-water carbonate deposits on submerged seamounts in the northwestern Pacific Ocean

Iryu, Y, Takayanagi, H, Yamada, T, Oda, M, Sato, T, Chiyonobu, S, Nishimura, A, Nakazawa, T

Report on Deep Sea Survey Technology for Natural Resources in Japan, Japan Oil, Gas and Metals National Corporation, Kawasaki　298-324　2007

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Misc. 30

Changes in coral reef environments due to land use change on Yoron Island: reconstruction from annual time series analysis of coral skeletal records.

堀上隼之介, 浅海竜司, 細田茜音, 坂巻隆史, 丸尾知佳子, 新城竜一, SHIN Ki-Cheol, 高柳栄子, 井龍康文

日本古生物学会例会講演予稿集(Web)　173rd　2024
Time series analysis of long-term variations in seawater temperature and salinity over the past 300 years based on modern coral geochemistry from Yoron Island, Kagoshima Prefecture, Japan

細田茜音, 浅海竜司, 堀上隼之介, 坂巻隆史, 丸尾知佳子, 新城竜一, SHIN Ki-Cheol, 高柳栄子, 井龍康文

日本古生物学会例会講演予稿集(Web)　173rd　2024
Time series analysis of long-term variations in seawater temperature and salinity over the past 300 years based on modern coral geochemical records from Yoron Island, Kagoshima Prefecture, Japan

細田茜音, 浅海竜司, 堀上隼之介, 新城竜一, SHIN Ki-Cheol, 高柳栄子, 井龍康文

日本サンゴ礁学会大会講演要旨集(Web)　26th　2023
Changes in coral reef environments due to land use change on Yoron Island: reconstruction based on annual time series analysis of coral skeletal records.

堀上隼之介, 浅海竜司, 細田茜音, 新城竜一, SHIN Ki-Cheol, 高柳栄子, 井龍康文

日本サンゴ礁学会大会講演要旨集(Web)　26th　2023
隠岐の島産現生腕足動物殻の炭素・酸素同位体組成の個体差および性別差

及川一真, 高柳栄子, 遠藤一佳, 吉田真明, 井龍康文

日本古生物学会例会講演予稿集　169th　2020
沖縄島洞穴遺跡産の淡水棲貝化石による更新世後期の古環境復元

本堂陸斗, 浅海竜司, 植村立, 新城竜一, 狩野彰宏, 藤田祐樹, 山崎真治, 高柳栄子, 井龍康文

日本古生物学会例会講演予稿集　168th　2019
陸水性続成作用が珪長質砕屑岩より産する腕足動物化石に与える影響の定量的評価

藤岡大, 高柳栄子, 山本鋼志, 井龍康文

日本古生物学会年会講演予稿集　2018　47　2018/06/22
現生腕足動物殻の微量金属元素濃度に関する基礎的研究

西尾拓哉, 高柳栄子, 浅海竜司, 新城竜一, 山本鋼志, 井龍康文

日本古生物学会年会講演予稿集　2018　29　2018/06/22
アラビア湾南岸に分布する上部ジュラ系~下部白亜系炭酸塩岩の統合化学層序

矢野元康, 高柳栄子, 石田圭史郎, 山本鋼志, 淺原良浩, 佐藤時幸, 井龍康文

石油技術協会誌　82　(4)　271‐272　2017/07

ISSN： 0370-9868
アラビア湾南岸に分布する下部白亜系炭酸塩岩の堆積環境および年代

高柳栄子, 矢野元康, 石田圭史郎, 淺原良浩, 山本鋼志, 佐藤時幸, 井龍康文

石油技術協会特別講演会・春季講演会(シンポジウム・個人講演)要旨集　2017　45　2017
アラビア湾南岸に分布する上部ジュラ系~下部白亜系炭酸塩岩の統合化学層序

矢野元康, 高柳栄子, 石田圭史郎, 山本鋼志, 淺原良浩, 佐藤時幸, 井龍康文

石油技術協会特別講演会・春季講演会(シンポジウム・個人講演)要旨集　2017　46　2017
アラビア湾南岸地域におけるバレミアン階炭酸塩岩の化学層序

水島大輔, 高柳栄子, 石田圭史郎, 淺原良浩, 山本鋼志, 佐藤時幸, 井龍康文

日本地質学会学術大会講演要旨　123rd　84　2016/09/05

ISSN： 1348-3935
腕足動物化石の炭素・酸素同位体組成と殻の微細構造は続成作用の進行によってどのように変化するか

滝澤護, 佐藤晋佑, TECHAPINYAWAT Lapone, 高柳栄子, CHAROENTITIRAT Thasinee, 浅海竜司, 阿部理, 原英俊, 曽根正敏, 山本鋼志, 井龍康文

日本地質学会学術大会講演要旨　123rd　293　2016/09/05

ISSN： 1348-3935
最終氷期の腕足動物殻化石を用いた中琉球の古環境復元

滝澤護, 高柳栄子, 山本鋼志, 阿部理, 佐々木圭一, 井龍康文

日本古生物学会年会講演予稿集　2016　44　2016/06/24
東赤道太平洋域の温度躍層深化に伴う漸新世の浮遊性有孔虫生息深度変化

松井浩紀, 西弘嗣, 高嶋礼詩, 黒柳あずみ, 池原実, 高柳栄子, 井龍康文

日本地球惑星科学連合大会予稿集(Web)　2016　2016
アラブ首長国連邦アブダビ沖の巨大油田におけるバレミアン階炭酸塩プラットフォーム堆積物中のドロマイト層の成因と発達

山本和幸, 山本和幸, OTTINGER Gary, AL‐ZINATI Osama, 高柳栄子, 山本鋼志, 井龍康文

日本地質学会学術大会講演要旨　122nd　103-202　2015/09/10
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2015.0_202 　

ISSN： 1348-3935
「カンブリア紀の農耕革命」はエディアカラ紀に始まっていた

大路樹生, DORNBOS Stephen Q, 矢田圭吾, 長谷川精, GONCHIGDORJ Sersmaa, 望月貴史, 高柳栄子, 井龍康文

日本古生物学会例会講演予稿集　164th　25　2015/01/30
腕足動物の同位体記録を歪める原因

高柳栄子, 浅海竜司, 大竹二雄, 阿部理, 宮島利宏, 北川浩之, 井龍康文

日本古生物学会例会講演予稿集　164th　2015
「カンブリア紀の農耕革命」はいつ始まったのか?

矢田圭吾, 大路樹生, DORNBOS Stephen, 長谷川精, GONCHIGDORJ Sersmaa, 望月貴史, 高柳栄子, 井龍康文

日本地球惑星科学連合大会予稿集(Web)　2015　ROMBUNNO.BPT27‐02 (WEB ONLY)　2015
Within- and inter-shell variations of carbon and oxygen isotope composition in Permian brachiopod shells from the Indochina terrane in Thailand

Takizawa Mamoru, Iryu Yasufumi, Lapone Techapinawat, Takayanagi Hideko, Charoentitirat Thasinee, Asami Ryuji, Abe Osamu, Hara Hidetoshi, Sone Masatoshi, Yamamoto Koshi

Annual Meeting of the Geological Society of Japan　2015　(0)　2015
Publisher: The Geological Society of Japan
ISSN： 1348-3935
南東フランス・Vocontian堆積盆地における下部-上部白亜系境界付近の放散虫生層序の検討

白井孝明, 鈴木紀毅, 高嶋礼詩, 西弘嗣, 井龍康文, 小川草平, 高柳栄子

日本古生物学会例会講演予稿集　163rd　2014
赤道太平洋IODP Exp.320/321における漸新世以降の浮遊性有孔虫群集と酸素・炭素同位体比

松井浩紀, 西弘嗣, 高嶋礼詩, 井龍康文, 高柳栄子

日本古生物学会年会講演予稿集　2014　2014
Depositional mechanism of an Aptian petroleum source rock in the southern Arabian Gulf region: Is it related to Oceanic Anoxic Event 1a?

Yamamoto Kazuyuki, Ishibashi Masatoshi, Takayanagi Hideko, Asahara Yoshihiro, Sato Tokiyuki, Nishi Hiroshi, Iryu Yasufumi

Annual Meeting of the Geological Society of Japan　2014　(0)　2014
Publisher: The Geological Society of Japan
ISSN： 1348-3935
Cretaceous standard chronostratigraphic framework based on integrated stratigraphy of planktic foraminifer and carbon isotope and U-Pb age of the Yezo Group and the Vocontian Basin sequence

Nishi Hiroshi, Takashima Reishi, Orihashi Yuji, Yamanaka Toshiro, Iryu Yasufumi, Takayanagi Hideko, Hayashi Keiichi

Annual Meeting of the Geological Society of Japan　2013　(0)　364-364　2013
Publisher: The Geological Society of Japan
DOI： 10.14863/geosocabst.2013.0_364 　

ISSN： 1348-3935
High-resolution analysis of the mid-Cretaceous Oceanic Anoxic Event 1b in the Vocontian Basin, Southeast France

Ogawa Sohei, Takashima Reishi, Nishi Hiroshi, Iryu Yasufumi, Takayanagi Hideko

Annual Meeting of the Geological Society of Japan　2013　(0)　2013
Publisher: The Geological Society of Japan
ISSN： 1348-3935
Radiolarian biostratigraphy across the Lower to Upper Cretaceous boundary in the Vocontian Basin, SE France

Shirai Takaaki, Suzuki Noritoshi, Takashima Reishi, Nishi Hiroshi, Iryu Yasufumi, Ogawa Sohei, Takayanagi Hideko

Annual Meeting of the Geological Society of Japan　2013　(0)　2013
Publisher: The Geological Society of Japan
ISSN： 1348-3935
Chemostratigraphy of Early Aptian carbonates offshore Abu Dhabi, United Arab Emirates: Interactions between global carbon-cycle perturbations and paleoenvironmental changes across Oceanic Anoxic Event 1a

Yamamoto Kazuyuki, Ishibashi Masatoshi, Takayanagi Hideko, Asahara Yoshihiro, Sato Tokiyuki, Nishi Hiroshi, Iryu Yasufumi

Annual Meeting of the Geological Society of Japan　2012　(0)　193-193　2012
Publisher: 一般社団法人日本地質学会
DOI： 10.14863/geosocabst.2012.0_193 　

ISSN： 1348-3935
Correlation of the Albian/Cenomanian boundary between Japan and France

Takashima Reishi, Nishi Hiroshi, Yamanaka Toshiro, Iryu Yasufumi, Takayanagi Hideko, Hayashi Keiichi, Koyasu Hiromichi, Ogawa Sohei

Annual Meeting of the Geological Society of Japan　2012　(0)　194-194　2012
Publisher: 一般社団法人日本地質学会
DOI： 10.14863/geosocabst.2012.0_194 　

ISSN： 1348-3935
P-48 Sedimentary facies and ages of carbonate deposits on submerged seamounts in the northwestern Pacific Ocean

Takayanagi Hideko, Iryu Yasufumi, Yamada Tsutomu, Oda Motoyoshi, Sato Tokiyuki, Chiyonobu Shun, Nishimura Akira, Nakazawa Tsutomu, Shiokawa Satoshi

114　239-239　2007/09/01
Publisher: The Geological Society of Japan
O-80 Halimeda limestones on submerged seamounts in the northernwestern Pacific Ocean

Iryu Y., Takayanagi H., Oda M., Sato T., Chiyonobu S., Nishimura A., Nakazawa T., Shiokawa S.

114　101-101　2007/09/01
Publisher: The Geological Society of Japan

Show all ︎Show first 5

Presentations 102

Australian northwest shelf: a late neogene reversible tectonic event International-presentation

Gallagher, S. J, McCaffrey, J, Wallace, M. W, Keep, M, McHugh, C, Fulthorpe, C. S, Bogus, K, Expedition, Scientists

AGU Fall Meeting 2017　2017/12/11
炭酸塩貯留岩の地質情報解析における化学層序の有用性

高柳栄子, 石田圭史郎, 山本鋼志, 淺原良浩, 井龍康文

炭酸塩岩分科会　2017/11/08
Geochemistry of Miocene dolomites at the western Australian shelf margin: IODP Site 1464, Roebuck Basin International-presentation

Yoshii, K, Takayanagi, H, Reuning, L, Ishikawa, T, Wakaki, S, Yamamoto, K, Iryu, Y

the IODP Expedition 356 2nd Post-Cruise Meeting 2017　2017/07/17
Relationships between paleoceanographic changes and Australian monsoon variability during the Pleistocene, the IODP Expedition 356 International-presentation

Sekine, N, Takayanagi, H, Groeneveld, J, Christensen, B. A, Bogus, K, Iryu, Y

the IODP Expedition 356 2nd Post-Cruise Meeting 2017　2017/07/17
Sedimentology and biogeochemistry of peritidal sediments from the Northwest Shelf of Australia and Abu Dhabi International-presentation

Reuning, L, Petrick, B, He, Y, Takayanagi, H, Sparwasser, K

the IODP Expedition 356 2nd Post-Cruise Meeting 2017　2017/07/17
Aragonite sedimentation and dissolution on a subtropical carbonate ramp, Carnarvon Ramp, SW Shelf of Australia International-presentation

Deik, H, Reuning, L, Petrick, B, Takayanagi, H

the IODP Expedition 356 2nd Post-Cruise Meeting 2017　2017/07/17
Oxygen and neodymium isotopes of Pleistocene foraminifers from IODP sites U1460 and U1463: preliminary results, the IODP Expedition 356 International-presentation

Takayanagi, H

the IODP Expedition 356 2nd Post-Cruise Meeting 2017　2017/07/17
アラビア湾南岸に分布する上部ジュラ系〜下部白亜系炭酸塩岩の統合化学層序

矢野元康, 高柳栄子, 石田圭史郎, 山本鋼志, 淺原良浩, 井龍康文

平成29年度石油技術協会春季講演会　2017/06/14
アラビア湾南岸に分布する下部白亜系炭酸塩岩の堆積環境および年代

高柳栄子, 矢野元康, 石田圭史郎, 山本鋼志, 淺原良浩, 井龍康文

平成29年度石油技術協会春季講演会　2017/06/14
Indian Ocean circulation changes over the Middle Pleistocene Transition International-presentation

Petrick, B. F, Auer, G, De Vleeschouwer, D, Christenson, B. A, Reuning, L, Martinez-Garcia, A, Haug, G, Gallagher, S. J, Fulthorpe, C. S, Bogus, K, nd IODP, Shipboard Science Party

AGU Fall Meeting 2016　2016/12/12
Linking changes in Indonesian Throughflow dynamics with the Middle Pleistocene Transition International-presentation

Petrick, B. F, Auer, G, De Vleeschouwer, D, Christenson, B. A, Reuning, L, Martinez-Garcia, A, Haug, G, Gallagher, S. J, Fulthorpe, C. S, Bogus, K, nd IODP, Shipboard Science Party

AGU Fall Meeting 2016　2016/12/12
Miocene wet and extreme arid climatic conditions revealed by the lithology of Roebuck and Perth Basins, Western Australia International-presentation

McHugh, C. M, Groeneveld, J, Henderiks, J, Renema, W, De Vleeschouwer, D, Christensen, B.A, Potts, D, Fulthorpe, C. S, K. Bogus, Stephen J. Gallagher, Expedition, Scientists

AGU Fall Meeting 2016　2016/12/12
Middle-late Miocene siliciclastic influx on the Australian Northwest Shelf: origins and potential links to global events International-presentation

Tagliaro, G, Fulthorpe, C. S, Lavier, L, Gallagher, S. G, Expedition, Scientists

AGU Fall Meeting 2016　2016/12/12
Mid-Pliocene to Early Pleistocene sea surface temperature history of the NW Australian Shelf International-presentation

Castañeda, I.S, Gilchrist, S, Salacup, J, Bogus, K, Fulthorpe, C.S, Stephen J. Gallagher, Expedition, Scientists

AGU Fall Meeting 2016　2016/12/12
Timing and pacing of Pliocene climate and paleoenvironmental change in southwestern Austalia (IODP Exp. 356, Site U1459) International-presentation

David De Vleeschouwer, Kara Bogus, Gerald Auer, Beth Christiansen, Soma Baranwal, Craig S. Fulthorpe, Stephen J. Gallagher, Jeroen Groeneveld, Christian Haller, Jorijntje Henderiks, Briony L. Mamo, Benjamin F. Petrick, Resti Samyati Jatiningrum, Expedition, Scientists

AGU Fall Meeting 2016　2016/12/12
The oldest Quaternary ooids and young reefs in the eastern Indian Ocean, evidence from the Northwest Shelf of Australia, IODP Expedition 356 International-presentation

Stephen J. Gallagher, Lars Reuning, Tobias Himmler, Jorijntje Henderiks, David De Vleeschouwer, Jeroen Groeneveld, Ali R. Lari, Craig S. Fulthorpe, Kara Bogus, Expedition, Scientists

AGU Fall Meeting 2016　2016/12/12
Indonesian Throughflow drove Australian climate from humid Pliocene to arid Pleistocene International-presentation

B.A. Christensen, W. Renema, J. Henderiks, D. De Vleeschouwer, J. Groeneveld, I.S. Castañeda, L. Reuning, K. Bogus, G. Auer, T. Ishiwa, C.M. McHugh, S.J. Gallagher, C.S. Fulthorpe, Expedition, Scientists

AGU Fall Meeting 2016　2016/12/12
Palaeobathymetric interpretations using foraminiferal data from the north-west continental shelf off Western Australia, IODP Expedition 356 International-presentation

Briony L. Mamo, Willem Renema, Gerald Auer, Jeroen Groeneveld, Stephen J. Gallagher, Craig S. Fulthorpe, Kara Bogus, Expedition, Scientists

AGU Fall Meeting 2016　2016/12/12
Temporal changes in Quaternary paleoenvironment and ostracode fauna in the eastern Indian Sea off Western Australia (IODP, Exp. 356, site U1461) International-presentation

Hokuto Iwatani, Moriaki Yasuhara, Charlie Morelle Angue Minto’O, Maria-Angela Bassetti, nd e, scientists

2016 AGU Fall Meeting　2016/12/12
Mid-Pliocene to Early Pleistocene sea surface temperature history of the NW Australian Shelf International-presentation

Castañeda, I.S, Gilchrist, S, Salacup, J, Bogus, K, Fulthorpe, C.S, Stephen J. Gallagher, Expedition, Scientists

2016/12/11
The impact of diagenesis on carbon and oxygen isotope composition and microstructure of Permian productid brachiopod shells

Takizawa, M, Sato, S, Techapinawat, L, Takayanagi, H, Charoentitirat, T, Asami, R, Abe, O, Hara, H, Sone, M, Yamamoto, K, Iryu, Y

2016/09/10
Chemostratigraphy of the Barremian carbonates in the southern Arabian Gulf region

Daisuke Mizushima, Hideko Takayanagi, Keishiro Ishida, Yoshihiro Asahara, Koshi Yamamoto, Tokiyuki Sato, Yasufumi Iryu

2016/09/10
Australian climate during the Miocene controlled by Antarctic dynamics International-presentation

Groeneveld, J, Henderiks, J, Renema, W, McHugh, C. M, De Vleeschouwer, D, Christensen, B. A, Fulthorpe, C. S, Reuning, L, Gallagher, S. J, Bogus, K, Ishiwa, T, Potts, D. C, Himmler, T, Kominz, M. A, Korpanty, C. A, Auer, G, Mamo, B. L, McGregor, H. V, Expedition, Scientists

12th International Conference on Paleoceanography　2016/08/29
The Plio-Pleistocene record of climate change from Western Australia International-presentation

Petrick, B. F, Auer, G, Christenson, B. A, De Vleeschouwer, D, Reuning, L, Martinez-Garcia, A, Haug, G, Gallagher, S. G, Fulthorpe, C. S, Bogus, K, Expedition, Scientists

12th International Conference on Paleoceanography　2016/08/29
Miocene to Recent Oceanographic and Climatic Histories from the Australian Northwest Shelf: Results from IODP Expedition 356 International-presentation

Fulthorpe, C. S, Gallagher, S. G, Bogus, K, Christensen, B. A, Groeneveld, J, Expedition, Scientists

35th IGC　2016/08/27
Decoupled Southern and Northern Hemisphere processes controlled by the Maritime continent: insights from a continuous Pliocene NW Australian shelf borehole (and decades of previous Ocean Drilling) International-presentation

Christensen, B. A, Renema, W, Henderiks, J, De Vleeshouwer, D, Groeneveld, J, Bogus, K, Gallagher, S. G, Fulthorpe, C. S, Expedition, Scientists

35th IGC　2016/08/27
IODP Expedition 356 Indonesian Throughflow and subsidence analysis from the preliminary results International-presentation

Lee, E. Y, Kominz, M, Gurnis, M, Gallagher, S, Fulthorpe, C, Bogus, K, Levin, E, IODP Expeditio, shipboard scientists

GeoTirol　2016/08/25
IODP Expedition 356: Insights into a 5 million year history of the Indonesian Throughflow, Australian monsoon, and subsidence on the northwest shelf of Australia International-presentation

Lee, E. Y, Gallagher, S. J, Fulthorpe, C. S, Bogus, K, IODP Expeditio, shipboard scientists

Europe-Korea Conference on Science and Technology　2016/07/27
A Miocene-Pliocene record of reefs, climate and subsidence off northwest Australia: preliminary results from International Ocean Discovery Program Expedition 356 International-presentation

Gallagher, S. J, Fulthorpe, C. S, Bogus, K, Expedition, Scientists

2016/07/05
Paleoenvironmental reconstruction in the Central Ryukyus during the last glacial period based on carbon and oxygen isotope records in fossil brachiopod shells

TAKAYANAGI Hideko

2016/06/24
High-resolution reservoir characterization based on genesis of dolomite – An example from a giant oil field of offshore Abu Dhabi –

Kazuyuki Yamamoto, Gary Ottinger, Osama Al-Zinati, Hideko Takayanagi, Koshi Yamamoto, Yasufumi Iryu

2016/06/08
Carbon isotope strategy of the Barremian carbonates in the southern Arabian Gulf region

Daisuke Mizushima, Hideko Takayanagi, Keishiro Ishida, Yoshihiro Asahara, Koshi Yamamoto, Tokiyuki Sato, Yasufumi Iryu

2016/06/08
IODP Expedition 356 reveals 5 million years of carbonate and subsidence history on the Northwest Shelf of Australia International-presentation

Gallagher, S. J, Fulthorpe, C. S, Bogus, K, Expedition, Scientists

56th Conference and Exhibition　2016/06/05
Preliminary report of International Ocean Discovery Program Expedition 356 –– What can we learn from the (sub) tropical carbonates off northwest Australia? ––

Hideko Takayanagi, Hokuto Iwatani, Takeshige Ishiwa, Resti Samyati Jatiningrum, the Expeditio, Scientists

Japan Geoscience Union Meeting 2016　2016/05/22
Changes in the Oligocene planktic foraminiferal depth habitat related to thermocline deepening in the eastern equatorial Pacific

Matsui, H, Nishi, H, Takashima, R, Kuroyanagi, A, Ikehara, M, Takayanagi, H, Iryu, Y

Japan Geoscience Union Meeting 2016　2016/05/22
Reefs, drifts and carbonate slopes - Integrating seismic and core data on the North West Shelf of Australia International-presentation

Reuning, L, Back, S, Expedition, Scientists

German IODP Meeting　2016/03/16
Deciphering the impact of the Indonesian Throughflow on the Australian climate during the Pliocene: A proposed Nd and Sr isotopic study International-presentation

Himmler, T, Expedition, Scientists

German IODP Meeting　2016/03/14
Impact of the Indonesian Throughflow on northwestern Australian biochronology (5-1.8 Ma)

Groeneveld, J, Expedition, Scientists

German IODP Meeting　2016/03/14
Changes of Oligocene planktic foraminiferal depth habitat in the eastern equatorial Pacific （IODP Site U1334 and U1333）

Hiroki Matsui, Hiroshi Nishi, Reishi Takashima, Yasufumi Iryu, Hideko Takayanagi, Minoru Ikehara

2015 AGU Fall Meeting　2015/12/14
タイ国インドシナ地塊（ペルム系）より産出した腕足動物殻化石における炭素・酸素同位体組成の殻内変化および個体差

滝澤護, Lapone Techapinawat, 髙栁栄子, Thasinee Charoentitirat, 浅海竜司, 阿部理, 原英俊, 曽根正敏, 山本鋼志, 井龍康文

日本地質学会第122年学術大会（長野大会）　2015/09/11
アラブ首長国連邦アブダビ沖の巨大油田におけるバレミアン階炭酸塩プラットフォーム堆積物中のドロマイト層の成因と発達

山本和幸, ゲイリー, オッティンガー, オサマアルジナティ, 高柳栄子, 山本鋼志, 井龍康文

日本地質学会第122年学術大会（長野大会）　2015/09/11
Origin and Development of a stratiform dolomite in Barremian oil field carbonates, offshore Abu Dhabi, United Arab Emirates International-presentation

Yamamoto, K, Ottinger, G, Al-Zinati, O, Takayanagi, H, Yamamoto, K, Iryu, Y

AAPG Anual Convention & Exhibition 2015　2015/05/31
喜界島の上部更新統より産するKikaithyris hanzawaiの炭素・酸素同位体組成および微量金属濃度の個体差

滝澤護, 髙栁栄子, 山本鋼志, 佐々木圭一, 井龍康文

日本地球惑星科学連合連合大会2015年大会　2015/05/24
Within- and inter-shell variations in carbon and oxygen isotope composition of modern brachiopods International-presentation

Takayanagi, H, Asami, R, Otake, T, Abe, O, Miyajima, T, Sasaki, K, Kitagawa, H, Iryu, Y

The 7th International Brachiopod Congress　2015/05/22
喜界島湾層産のKikaithyris hanzawai（約70 ka）の炭素・酸素同位体組成による古海洋環境復元

滝澤護, 高柳栄子, 山本鋼志, 佐々木圭一, 井龍康文

日本地質学会東北支部2014年度総会　2015/03/07
「カンブリア紀の農耕革命」はエディアカラ紀に始まっていた

大路樹生, Stephen Q. Dornbos, 矢田圭吾, 長谷川精, Sersmaa Gonchigdorj, 望月貴史, 高柳栄子, 井龍康文

日本古生物学会第164回例会　2015/01/31
腕足動物の同位体記録を歪める原因

高柳栄子, 浅海竜司, 大竹二雄, 阿部理, 宮島利宏, 北川浩之, 井龍康文

日本古生物学会第164回例会　2015/01/31
石垣島の現生サンゴ骨格から復元された過去約500年間の海洋環境変動

福留綾里紗, 浅海竜司, 阿部理, 高柳栄子, 平井彰, 井龍康文

日本古生物学会第164回例会　2015/01/30
鉄同位体を利用した古海洋環境復元の試み

田中啓, 安田友紀, 鈴木和博, 久保貴志, 申基澈, 高柳栄子, 井龍康文, 淺原良浩

第4回同位体環境学シンポジウム　2014/12/22
琉球列島多良間島に分布する琉球層群の層序および年代

大関萌, 今井遼, 高柳栄子, 井龍康文

日本地質学会第121年学術大会　2014/09/14
アラビア湾南岸地域におけるアプチアン階石油根源岩の形成要因と海洋無酸素事変（OAE1a）との関連性

山本和幸, 石橋正敏, 高柳栄子, 浅原良浩, 佐藤時幸, 西弘嗣, 井龍康文

日本地質学会第121年学術大会　2014/09/14
Preservation of ichnocoenosis in present-day macroid, algal nodule and rhodolith beds (S. Japan, E. Australia, S. Spain): Palaeoecological inferences

Bassi, D, Braga, J. C, Iryu, Y, Takayanagi, H

The 7th International Meeting on Taphonomy and Fossilization　2014/09/10
A newly identified positive excursion of 87Sr/86Sr ratio in the Lower Aptian platform carbonates offshore Abu Dhabi, UAE: Is it a local or global signature of Ocean Anoxic Event 1a? International-presentation

Yamamoto, K, Ishibashi, M, Takayanagi, H, Asahara, Y, Sato, T, Nishi, H, Iryu, Y

The 2nd International Symposium of IGCP 608 “Cretaceous Ecosystems and Their Responses to Paleoenvironmental Changes in Asia and the Western Pacific“　2014/07/04
赤道太平洋IODP Exp.320/321における漸新世以降の浮遊性有孔虫群集と酸素・炭素同位体比

松井浩紀, 西弘嗣, 高嶋礼詩, 井龍康文, 高柳栄子

日本古生物学会2014年年会　2014/06/27
Reconstruction of sea-surface temperature and the Indian Ocean Dipole in the eastern Indian Ocean during the last 200 years International-presentation

International Joint workshop on coral reef environmental earth sciences　2014/03/24
Coral Sr/Ca records from Enggano Island (Indonesia): Proxy records of IOD-induced upwelling and mean SST in the Eastern Indian Ocean International-presentation

Pfeiffer, M, Takayanagi, H, Cahyarini, S. Y, Watanabe, T, Garbe-Schönberg, D, Reuning, L

AGU Ocean Science Meeting 2014　2014/02/23
ヒレナシジャコの殻の酸素同位体組成を用いた海水温復元の信頼性および問題点

山梨純平, 高柳栄子, 伊佐地彩加, 浅海竜司, 井龍康文

日本古生物学会第163回例会　2014/01/24
フランス・Vocontian堆積盆地における下部－上部白亜系境界付近の放散虫化石層序

白井孝明, 鈴木紀毅, 高嶋礼詩, 西弘嗣, 井龍康文, 小川草平, 高柳栄子

日本地質学会第120年学術大会　2013/09/14
フランス・Vocontian Basin Sequenceと北海道・蝦夷層群の浮遊性有孔虫化石・炭素同位体比統合層序とU-Pb年代による白亜系標準年代層序の樹立

西弘嗣, 高嶋礼詩, 折橋裕二, 山中寿朗, 井龍康文, 高柳栄子, 林圭一

日本地質学会第120年学術大会　2013/09/14
フランス南東部Vocontian堆積盆地における白亜紀中期・海洋無酸素事変1bの高解像度解析

小川草平, 高嶋礼詩, 西弘嗣, 井龍康文, 高柳栄子

日本地質学会第120年学術大会　2013/09/14
Philippine Sea Plate Motion Since Eocene Estimated From Paleomagnetism of Seafloor Drill Cores and Gravity Cores International-presentation

Yamazaki, T, Takahashi, M, Iryu, Y, Sato, T, Oda, M, Takayanagi, H, Chiyonobu, S, Nishimura, A, Nakazawa, T, Ooka, T

AOGS-AGU (WPGM) Joint Assembly　2013/08/13
石垣島の現生サンゴから得られた過去約500年間の骨格年輪記録

浅海竜司, 阿部理, 高柳栄子, 平井彰, 森本真紀, 井龍康文

日本海洋学会2013年春季大会　2013/03/22
腕足動物ー古環境復元に使える部分，使えない部分ー

高柳栄子, 山本鋼志, 浅海竜司, 大竹二雄, 宮島利宏, 阿部理, 井龍康文

東大大気海洋研研究集会「バイオミネラリゼーションと石灰化」　2012/11/10
Integrated stratigraphic correlation of the Upper Albian-Lower Cenoma-nian successions between Japan and France International-presentation

Takashima, R, Nishi, H, Yamanaka, T, Iryu, Y, Takayanagi, H, Quidelleur, X, Latil, G.-L, Hayashi, K, Koyasu, H, Ogawa, S

G-COE Symposium 2012, Achievements of G-COE Program for Earth and Planetary Dynamics　2012/09/27
日本とフランスにおける白亜系Albian/Cenomanian境界の対比

高嶋礼詩, 西弘嗣, 山中寿朗, 井龍康文, 高柳栄子

日本地質学会第119年学術大会　2012/09/15
アラブ首長国連邦アブダビ沖の前期アプチアン炭酸塩岩コア試料に記録された海洋無酸素事変（OAE1a）時におけるグローバル炭素循環と古海洋環境変遷

山本和幸, 石橋正敏, 高柳栄子, 浅原良浩, 佐藤時幸, 西弘嗣, 井龍康文

日本地質学会第119年学術大会　2012/09/15
High-resolution analysis of daily growth bands in giant clams International-presentation

Isaji, A, Asami, R, Takayanagi, H, Iryu Y

12th International Coral Reef Symposium　2012/07/09
どうすれば，腕足動物殻の炭素・酸素同位体組成および微量金属元素濃度から正確に顕生代の環境変動を描き出せるのか？

高柳栄子, 井龍康文

日本古生物学会2012年年会・総会　2012/06/29
Icnocenosi in rhodoliti non tropicali: Fraster Island, Australia Orientale International-presentation

Bassi, D, Iryu, Y, Braga, J. C, Takayanagi, H, Tsuji, Y

Giornate di Paleontologia XII Edizione　2012/05/24
Sedimentary and diagenetic history of Kita-daito-jima atoll for the last 25 million years

Iryu, Y, Takayanagi, H, Ishikawa, T, Nagaishi, K, Nakayama, Y

Japan Geoscience Union Meeting 2012　2012/05/20
シャコガイの成長輪に記録される環境因子

伊佐地彩加, 浅海竜司, 高柳栄子, 井龍康文

東大大気海洋研研究集会「バイオミネラリゼーションと石灰化」　2011/11/18
粟国島沖（水深606m）より採取された現生腕足動物の殻の炭素・酸素同位体組成

高柳栄子, 浅海竜司, 阿部理, 宮島利宏, 北川浩之, 井龍康文

東大大気海洋研研究集会「バイオミネラリゼーションと石灰化」　2011/11/18
シャコガイの成長輪は何を記録しているのか

伊佐地彩加, 浅海竜司, 高柳栄子, 井龍康文

日本サンゴ礁学会第14回大会　2011/11/03
Recent deep-water macroid beds from southwest of Kikai-jima in the northern Ryukyu Islands, southern Japan: ecology and taphonomy International-presentation

Bassi, D, Humblet, M, Iryu, Y, Matsuda, H, Takayanagi, H

10th International Symposium on Fossil Algae　2011/09/12
Rhodolith beds from the Abrolhos Bank, Brazilian platform: taphonomy, geochemistry, ecology International-presentation

Bassi, D, Leal, R. N, Takayanagi, H, Iryu, Y, Posenato, R, Amado-Filho

6th International Meeting on Taphonomy and Fossilization　2011/06/14
Subtropical northwest Pacific climate reconstruction from speleothem records from Gyaokusen-do Cave in Okinawa Island

Asami, R, Uemura, R, Yamakawa, S, Minami, M, Takayanagi, H, Iryu, Y

Japan Geoscience Union Meeting 2011　2011/05/22
Intraspecific variations in carbon and oxygen isotope compositions of a modern brachiopod collected off Okinawa-jima

Takayanagi, H, Asami, R, Otake, T, Abe, O, Kitagawa, H, Iryu, Y

Japan Geoscience Union Meeting 2011　2011/05/22
腕足動物殻の炭素・酸素同位体組成はどの程度正確な古環境指標となりうるのか？ー Terebratulina crosseiを例にしてー

高柳栄子, 浅海竜司, 大竹二雄, 阿部理, 北川浩之, 井龍康文

東大大気海洋研研究集会「バイオミネラリゼーションと石灰化」　2011/02/10
腕足動物Terebratulina crosseiはどの程度正確に海洋環境を記録しているか？

高柳栄子, 浅海竜司, 大竹二雄, 阿部理, 北川浩之, 井龍康文

日本古生物学会第160回例会　2011/01/28
Basiliola lucidaの炭素・酸素同位体組成の地域差に関する研究

高柳栄子, 浅海竜司, 大竹二雄, 阿部理, 北川浩之, 井龍康文

共同利用研究集会「2010年度古海洋シンポジウム」　2011/01/06
現生腕足動物の殻の炭素・酸素同位体組成の個体差に関する研究〜古環境指標としての有用性の評価と化石試料への応用を目指して〜

高柳栄子, 浅海竜司, 大竹二雄, 阿部理, 北川浩之, 井龍康文

名古屋大学若手女性研究者サイエンスフォーラム　2010/11/12
-COREF計画の紹介琉球列島のサンゴ礁の昔と今と未来-

井龍康文, 藤田和彦, 浅海竜司, 高柳栄子

沖縄科学の最前線2010　2010/09/19
大槌湾より採取した現生腕足動物Terebratulina crosseiの殻の炭素・酸素同位体組成の個体差

高柳栄子, 浅海竜司, 大竹二雄, 阿部理, 北川浩之, 井龍康文

日本地質学会第117年学術大会　2010/09/18
Uplift rate of Kita-daito-jima on the lithospheric forebulge of the Philippine Sea Plate

Iryu, Y, Takayanagi, H, Ishikawa, T, Budd, A. David

117 th Annual meeting of the Geological Society of Japan　2010/09/18
Lithology and ages of Cretaceous shallow-water carbonates from the Ogasawara Plateau

Takayanagi, H, Iryu, Y

Japan Geoscience Union Meeting 2010　2010/03/23
Investigation of drowned carbonate platforms and origin of Cretaceous Pacific seamounts on the Ogasawara Plateau International-presentation

INVEST IODP New Ventures in Exploring Scientific Targets　2009/09/22
沖縄県北大東島に分布する炭酸塩岩のSr同位体比年代

高柳栄子, 中山裕樹, 石川剛志, 永石一弥, 井龍康文

日本地質学会第116年学術大会　2009/09/04
Secular variation in composition of shallow-water carbonates on submerged seamounts in the northwestern Pacific Ocean

Takayanagi, H, Iryu, Y, Yamada, T, Oda, M, Sato, T, Chiyonobu, S, Nishimura, A, Nakazawa, T, Shiokawa, S

Japan Geoscience Union Meeting 2009　2009/05/16
Cretaceous shallow-water carbonates from the Hahajima Seamount and the Ogasawara Plateau

Ninomiya, J, Takayanagi, H, Ishikawa, T, Nagaishi, K, Nishimura, A, Nakazawa, T, Shibasaki, H, Iryu, Y

Japan Geoscience Union Meeting 2010　2009/05/16
Philippine Sea plate motion since Eocene estimated from paleomagnetism of seafloor drill cores and gravity cores

Yamazaki, T, Takahashi, M, Iryu, Y, Sato, T, Oda, M, Takayanagi, H, Chiyonobu, S, Nishimura, A, Nakazawa, T, Ooka, T

Japan Geoscience Union Meeting 2010　2009/05/16
北西太平洋の海山から採取された炭酸塩岩の堆積年代とその要因

高柳栄子, 井龍康文, 尾田太良, 佐藤時幸, 西村昭, 中澤努, 塩川智

日本堆積学会2009年京都・枚方大会　2009/03/27
北西太平洋の海山から採取された炭酸塩岩の組成の時代変遷とその要因

高柳栄子, 井龍康文, 尾田太良, 佐藤時幸, 西村昭, 中澤努, 塩川智

日本地質学会第115年学術大会　2008/09/20
Carbonate sedimentology and controlling factors for the shallow-water carbonate on submerged seamounts in the northwestern Pacific Ocean International-presentation

Takayanagi, H, Iryu, Y, Oda, M, Sato, T, Chiyonobu, S, Nishimura, A, Nakazawa, T, Shiokawa, S

6th International Conference on Asian Marine Geology　2008/08/29
Evolution of carbonate factories for the last 100 million years based on investigations on shallow-water carbonate deposits on seamounts in the northwestern Pacific Ocean International-presentation

Iryu, Y, Takayanagi, H, Oda, M, Sato, T, Chiyonobu, S, Nishimura, A, Nakazawa, T, Shiokawa, S

11th International Coral Reef Symposium　2008/07/09
北西太平洋の大水深域に分布する海山上の浅海性炭酸塩岩

高柳栄子, 井龍康文, 山田努, 尾田太良, 佐藤時幸, 西村昭, 中澤努, 塩川智

6専攻合同シンポジウム「ヤングブレインズの連携による学際的研究の創出」　2008/02/20
Halimeda sea vs. Nummulite sea

井龍康文, 高柳栄子, 尾田太良, 佐藤時幸, 西村昭, 中澤努, 塩川智

日本サンゴ礁学会第10回大会　2007/11/23
Halimeda dominated deposits on submerged seamounts in the northern Philippine Sea International-presentation

Iryu, Y, Takayanagi, H, Oda, M, Sato, T, Chiyonobu, S, Nishimura, A, Nakazawa, T, Shiokawa, S

9th International Symposium on Fossil Algae　2007/09/19
北西太平洋の海山から採取された炭酸塩岩の堆積相および年代

高柳栄子, 井龍康文, 山田努, 尾田太良, 佐藤時幸, 西村昭, 中澤努, 塩川智

日本地質学会第114年学術大会　2007/09/09
北西太平洋の海山から採取されたHalimeda石灰岩

井龍康文, 高柳栄子, 尾田太良, 佐藤時幸, 西村昭, 中澤努, 塩川智

日本地質学会第114年学術大会　2007/09/09
Carbonate Deposits on Submerged Seamounts in the northwestern Pacific International-presentation

Takayanagi, H, Iryu, Y, Yamada, T, Oda, M, Yamamoto, K, Sato, T, Chiyonobu, S, Nishimura, A, Nakazawa, T, Shiokawa, S

International Symposium on 10th Fossil Cnidaria & Porifera　2007/08/12
Carbonate deposits on submerged seamounts in the northwestern Pacific

Takayanagi, H, Iryu, Y, Yamada, T, Oda, M, Sato, T, Chiyonobu, S, Nishimura, A, Nakazawa, T, Shiokawa, S

9th Annual Meeting on Japanese Coral Reef Society　2006/11/24
北西太平洋の海山から採取された炭酸塩岩の堆積学的研究

高柳栄子, 井龍康文, 山田努, 尾田太良, 佐藤時幸, 西村昭, 中澤努, 塩川智

日本地質学会第113年学術大会　2006/09/16

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Research Projects 17

Temporal changes in composition and dynamics in the North Pacific sub-surface and intermediate water masses since the last glacial period and their factors

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2025/04 - 2029/03
Development of a water isotope tracing method to visualize the salt stress response of marine organisms of biological interest

Offer Organization: Kurita Water and Environment Foundation

System: KWEF Research Grant

Institution: Tohoku University

2026/10 - 2027/09
先端的同位体分析手法によって読み解く第四紀の海洋Sr循環ダイナミクス

若木重行, 堀川恵司, 高柳栄子, 吉村寿紘

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 国立歴史民俗博物館

2024/04/01 - 2027/03/31
Effects and mechanism of burial diagenesis on the chemical composition of biogenic carbonates

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2023/04/01 - 2027/03/31
Reconstructions of seawater temperature and salinity time series and the Kuroshio Current variability for the last 400 years using geochemical analyses of large biogenic carbonates

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2022/04/01 - 2026/03/31
Meteoritic carbonate synthesis constrained by carbon isotope compositions

Furukawa Yoshihiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Research (Exploratory)

Institution: Tohoku University

2022/06/30 - 2024/03/31

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Aqueously-altered meteorites and asteroids contain organic matter such as amino acids and sugars, which may have contributed to the supply of life's building blocks to the Earth. Such meteorites also contain carbonates with a wide range of carbon isotopic compositions enriched in 13C. In this study, we focused on the fact that formose-type reactions using aldehydes as a carbon source produce amino acids and sugars, and that these reactions are catalyzed by calcium. Various Formose-type reaction experiments were performed to identify the carbonates produced. The results showed that the carbonate produced was calcite, and that the calcite carbon was enriched in 13C compared to the insoluble organic matter produced at the same time. On the other hand, the extent of 13C enrichment is not enough to explain the wide range of 13C-rich carbon isotopic compositions found in the meteorites. Mixing with highly 13C enriched CO2 in asteroids may explain the wide range of 13C enrichments.
「雪玉地球」後の急激な生物進化に関する実証的研究

大路樹生, 井龍康文, 高柳栄子

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 名古屋大学

2019/04/01 - 2024/03/31

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カンブリア系の動物化石群として有名なカナダのバージェス頁岩の動物化石群を蒲郡市生命の海科学館から借用し、それらを２枚の偏光板で挟む手法を用いて光学観察することで軟体部を含む明瞭な形態情報を得ることができた。この手法で多数の標本が産出するMarrella splendensの表面を観察したところ、その腹部から尾部にかけて黒色の染みの存在がほぼすべての個体に見ることができた。この染みの面積は化石体の大きさに正の相関を持つことから、化石化過程の初期に体の内部から染み出した体液に起因するものであることが推察された。カンブリア紀の動物多様化に比較される現象である、古生代末の大量絶滅後の海洋動物の回復現象に関する研究を、宮崎県高千穂地域の上村石灰岩をフィールドに行い、特にそこに含まれている二枚貝類のサイズ変化を追跡することで海洋底生動物と環境変遷との対応を調べた。その結果、ペルム紀・三畳紀境界以降サイズ増加が見られるものの、Smithian階以降順調に大型化するわけではなく、底生動物にとってストレスのかかった環境が継続していたことが示唆される。またカンブリア紀に引き続いて多様化の現象が起きたオルドビス紀初期の化石群として、モロッコ産の節足動物化石の研究を開始し、これがカンブリア紀の生き残りで大型化した、二枚の殻を持つ節足動物化石である可能性を指摘することが出来た。この研究を進めるためには、今後モロッコ産の同様の化石標本を海外で観察し、比較する必要がある。
氷期－間氷期における北太平洋亜熱帯モード水の挙動とその役割

高柳栄子, 井龍康文, 横山祐典, 若木仁美, 石川剛志, 板木拓也, 若木重行

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 東北大学

2019/04/01 - 2022/03/31

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過去の亜熱帯モード水の分布・物理・化学的性質を再現性高く復元するためには，現在の亜熱帯モード水影響下の現生生物・準化石の群集組成・地球化学データと実際の海洋観測データおよび水塊構造を比較し，亜熱帯モード水の分布・組成を定量的に評価できる手法を作成し，それを化石試料に応用する必要がある．2020年度は，2019年度に現生試料を用いて確立した手法を琉球列島周辺海域より得られた腕足動物の準化石に応用し，過去約2万年間の亜熱帯モード水の物理・化学的性質（水温・塩分・溶存酸素濃度・炭酸系など）および分布と琉球列島中層域の水塊構造の時系列変化を検討した．具体的には，2019年度に確立したB. lucida準化石が1）合弁試料，2）離弁試料，3）破片試料だった場合に分けたサンプリング法に基づいて粉末試料を作成し，その炭素・酸素同位体分析，微量金属元素分析，放射性炭素年代測定などを行った．また，琉球列島周辺の表層堆積物のネオジム・ストロンチウム同位体比も検討した．その結果，B. lucida準化石の炭素・酸素同位体比から過去2万年間の水温・塩分，溶存無機炭素濃度の空間分布の変化を部分的に復元することができた．また，同準化石の微量金属元素濃度分析は，同一試料に物理・化学クリーニングを行い，その必要性について検討している．琉球列島周辺の表層堆積物のネオジム・ストロンチウム同位体比を分析した結果，沖縄本島周辺と八重山諸島周辺とで，亜表層水の海水の起源が異なる可能性が示唆された．
Ultra-high precision Sr isotope analysis for Sr isotope stratigraphy of quaternary samples

WAKAKI Shigeyuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Japan Agency for Marine-Earth Science and Technology

2018/04/01 - 2021/03/31

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Sr isotope stratigraphy is widely used to determine sedimentation ages of marine sediments and carbonates. However, dating of quaternary samples by this method was difficult so far because the precision of the 87Sr/86Sr ratio measurement was insufficient to distinguish the very small 87Sr/86Sr variation of the seawater during this period. To resolve this technical bottleneck problem, we developed method for an ultra-high precision analysis of 87Sr/86Sr ratio using dynamic-multicollection thermal ionization mass spectrometry. The long-term analytical reproducibility of 87Sr/86Sr ratio achieved in this study was 2 ppm (2RSD). This analytical precision is sufficient to discriminate between 100 ky cycle of glacial-interglacial periods of the quaternary era. Analysis of foraminifera samples separated from oceanic drilling cores suggested that the current seawater Sr isotopic evolution curve may contain very small systematic errors in the quaternary part.
北西太平洋中緯度域の亜熱帯モード水の規模および物理・化学的性質の時間変化と炭素循環における役割

高柳栄子

Offer Organization: 公益財団法人カシオ科学振興財団

System: 第36回研究助成

Institution: 東北大学大学院理学研究科

2018/12 - 2021/03
Initiation and establishment of the Leeuwin Current system induced aridification of Australian continent

Takayanagi Hideko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (B)

Institution: Tohoku University

2017/04/01 - 2019/03/31

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We investigated carbon, oxygen, and neodymium isotopes of foraminifers collected from IODP sites U1460 and U463 to delineate the history of the Leeuwin Current and its surrounding surface water masses for the last 4 million years. The cores are mainly composed of shallow water carbonates. We defined Marine Isotope Stage (MIS) of the cores using the correlation between the oxygen isotope records, calcareous nannofossil biostratigraphy, and global benthic LR04 stack from Lisiecki and Raymo (2005). Our results indicate that the modern Leeuwin Current system had initiated from ~1 million years ago, and it became a modern state after the Mid-Brunhes Event. Our records also infer that the LC was not reduced during glacial periods.
現生腕足動物殻の微量金属元素に関する基礎的研究

高柳栄子

Offer Organization: 深田地質研究所

System: 深田研究助成

Institution: 東北大学大学院理学研究科

2018/04 - 2019/03
From Snowball Ice to the Cambrian explosion: toward better understanding of the linkage between earth's environmental dynamics and biotic evolution

Oji Tatsuo, DORNBOS STEVEN Q., GONCHIGDORJ SERSMAA

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Nagoya University

2015/04/01 - 2018/03/31

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Two species of fossil algae were discovered from the Ediacaran of Zuun Arts, western Mongolia. The beds that contained these algae were concluded as special type of sedimentary rock known as "Burgess-type deposit" based on the chemical analysis and the mode of preservation. In addition, vertical trace fossils were discovered from the Ediacaran of Bayan Gol gorge. These trace fossils show U-shape that penetrate down to 4cm below the uppermost opening, suggesting that the producer was a bilaterian animal that was elongate in form and could burrow deep into the sediment, thus possessed ample musculature. Also this burrow suggests existence of predatory animals. This discovery was contradictory to the existing interpretation about Ediacaran life, firstly giving possible evidence of the existence of bilaterian animals and also predatory animals.
琉球列島サンゴ礁の形成・発達と第四紀の古気候・古海洋環境変動

高柳栄子

Offer Organization: 公益財団法人藤原ナチュラルヒストリー振興財団

System: 第26回学術研究助成

Institution: 東北大学大学院理学研究科

2017/04 - 2018/03
Carboniferous and Permian paleoceanographic condition reconstruced from caron and oxygen isotope composition of brachiopod shells from Thailand

Yasufumi Iryu, YAMAMOTO Koshi, HARA Hidetoshi, ASAMI Ryuji, ABE Osamu, TAKAYANAGI Hideko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2014/04/01 - 2017/03/31

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There are significant intrashell variations in carbon and oxygen isotope composition (d13C and d18O, respectively) and trace element concentrations in modern brachiopod shells. This knowledge was applied to Carboniferous and Permian brachiopod shells collected from central Thailand, resulting in the establishement of a standard protocol to find shell portions, the original isotopic and chemical compositions of which were not affected by the vital effect and diagenetic alteration. Capitanian (Permian) seawater temperature estimated from the d18O values of such shell portions was 28-35 °C. This value is very similar to that in the equatorial region.
Reconstruction of paleoinsolation and paleoenvironmental changes during the Middle Holocene

Takayanagi Hideko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Research Activity Start-up

Institution: Tohoku University

2014/08/29 - 2016/03/31

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The sclerochronology and geochemistry of a giant clam Tridacna gigas shell collected from the South Ryukyus, Japan has been investigated for reconstructing paleoinsolation and paleoenvironmental changes during the Middle Holocene. Black and light growth bands were clearly confirmed in the T. gigs shell. Since growth variation in the Tridacna shell showed the seasonality, we inferred that such growth bands are probably daily increments. Oxygen isotope composition of the Tridacna shell showed secular changes in sea surface temperature (SST) during the Middle Holocene. Seasonal amplitude of the SST in the Middle Holocene was close to that of recent SST variation. The oxygen isotope profile indicate long-lasting warming during the Middle Holocene.
沖縄および奄美海域における過去2000年間のSuess効果の定量的評価

高柳栄子

Offer Organization: 株式会社パレオ・ラボ

System: 若手研究者を支援する研究助成

Institution: 名古屋大学大学院環境学研究科

2011/09 - 2012/03

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International Ocean Discovery Program Expedition 356