2019 Fiscal Year Annual Research Report
Core-mantle evolution constrained by element partitioning
Project Area | Interaction and Coevolution of the Core and Mantle: Toward Integrated Deep Earth Science |
Project/Area Number |
15H05831
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Research Institution | Niigata University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
三部 賢治 東京大学, 地震研究所, 助教 (10372426)
舘野 繁彦 東京工業大学, 地球生命研究所, 特任助教 (30572903)
鎌田 誠司 東北大学, 理学(系)研究科(研究院), その他 (30611793)
秋澤 紀克 東京大学, 大気海洋研究所, 助教 (40750013)
小木曽 哲 京都大学, 人間・環境学研究科, 教授 (60359172)
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Project Period (FY) |
2015-06-29 – 2020-03-31
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Keywords | 核-マントル / 元素分配 / 同位体分別 / 高温高圧実験 |
Outline of Annual Research Achievements |
高温高圧実験とその合成試料や天然試料の様々な分析を行った。具体的には、放射光X線粉末解析、メスバウア分光分析、レーザー加熱式ダイヤモンドアンビルセルを用いた高圧実験と化学組成分析や炭素・酸素・硫黄同位体分析を行い、以下の代表的な成果を得た。 (1) 下部マントルに2番目に多く含まれる鉱物であるフェロペリクレースの放射光X線粉末回折と、ビームラインに放射光メスバウア分光機を使用した高圧実験(0~160GPa)のその場観察 を行った。その結果フェロペリクレースは160GPaまで等軸晶系が安定であり、61-136GPaの間は低スピン状態と高スピン状態が共存し、136GPaより高い圧力では低スピン状態のみ存在することが明らかになった。 (2)かんらん岩に含まれる強親鉄性元素のマイクロスケールの分布を解析し、強親鉄性元素を核-マントル相互作用のトレーサーとして用いるには、地球深部での炭素質メルトの挙動が鍵となることを明らかにした。 (3)Fe-S系における核の温度圧力条件での実験結果により、Fe2Sが外核-内核境界条件での最も安定な硫黄化合物であることが明らかになった。
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Research Progress Status |
令和元年度が最終年度であるため、記入しない。
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Strategy for Future Research Activity |
令和元年度が最終年度であるため、記入しない。
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Research Products
(66 results)
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[Journal Article] Geochemistry and Sr-Nd isotopic composition of meta-gabbros from the Omi serpentinite mélange, Niigata, SW Japan: Evidence for subduction erosion in an immature early Paleozoic arc-trench system in proto-Japan.2021
Author(s)
Satish-Kumar, M., Kurihara, T., Shishido, R., Yoshida, T., Takahashi, T. and Nohara-Imanaka, R.
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Journal Title
Lithos
Volume: -
Pages: -
Peer Reviewed
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[Journal Article] A geochemical and isotopic perspective on tectonic setting and depositional environment of Precambrian meta-carbonate rocks in collisional orogenic belts2021
Author(s)
Satish-Kumar, M., Shirakawa, M., Imura, A., Otsuji-Makino, N., Imanaka-Nohara, R., Malaviarachchi, S. P. K., Fitzsimons, I. C. W., Sajeev, K., Grantham, G. H., Windley, B. F., Hokada, T., Takahashi, T., Shimoda, G. & Goto, K. T.
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Journal Title
Gondwana Research
Volume: -
Pages: -
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Structural and geochemical evidence for a failed rift crustal evolution model in Western Dharwar Craton, South India2021
Author(s)
Sreehari, L., Toyoshima, T., Satish-Kumar, M., Takahashi, T., & Ueda, H.
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Journal Title
Lithos
Volume: 388-389
Pages: 106020~106020
DOI
Peer Reviewed
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[Journal Article] Compressional behavior and spin state of δ-(Al,Fe)OOH at high pressures2019
Author(s)
Itaru Ohira, Jennifer M. Jackson, Natalia V. Solomatova, Wolfgang Sturhahn, Gregory J. Finkelstein, Seiji Kamada, Takaaki Kawazoe, Fumiya Maeda, Naohisa Hirao, Satoshi Nakano, Thomas S. Toellner, Akio Suzuki, Eiji Ohtani
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Journal Title
American Mineralogist
Volume: 104(9)
Pages: 1273-1284
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Sound velocity of Fe3C at high pressure and high temperature determined by inelastic X-ray scattering2019
Author(s)
Suguru Takahashi, Eiji Ohtani, Tatsuya Sakamaki, Seiji Kamada, Hiroshi Fukui, Satoshi Tsutsui, Hiroshi Uchiyama, Daisuke Ishikawa, Naohisa Hirao, Yasuo Ohishi, Alfred Q.R. Baron
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Journal Title
Comptes Rendus Geoscience
Volume: 351(2-3)
Pages: 190-196
DOI
Peer Reviewed / Open Access
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[Journal Article] Fe2S: The Most Fe-Rich Iron Sulfide at the Earth's Inner Core Pressures2019
Author(s)
S. Tateno, H., Ozawa, K., Hirose, T., Suzuki, S., I-Kawaguchi, N., Hirao
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Journal Title
Geophysical Research Letters
Volume: 46
Pages: 11944-11949
DOI
Peer Reviewed
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[Presentation] The Kuunga Nappe of Sverdrupfjella, western Dronning Maud Land, Antarctica2020
Author(s)
Grantham, G. H., Horie, K., Satish-Kumar, M., Ueckermann, H., Groenewald. C., le Roux, P.
Organizer
Scientific Comitte on Antarctic Research (SCAR) Online 2020
Int'l Joint Research
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[Presentation] C-O-Sr-Nd-Pb isotope geochemistry of metacarbonate rocks in continental collision zones as proxies for estimating the sedimentation age and understanding the tectonic setting of deposition2020
Author(s)
Satish-Kumar, M., Imura, A., Shirakawa, M., Shimoda, G., Goto, K. T., Malaviarachchi, S. P. K.
Organizer
JpGU - AGU Joint Meeting 2020
Int'l Joint Research
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[Presentation] Petrological and geophysical implications for Mado Megamullion, Philippine Sea.2019
Author(s)
Akizawa, N., Okino, K., Ishizuka, O., Yamashita, H., Machida, S. and Ohara, Y.
Organizer
日本鉱物科学会2019年年会
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[Presentation] Native iron formation during mantle metasomatism ecorded in a mantle xenolith from Aitutaki Island, Cook Islands.2019
Author(s)
Akizawa, N., Ozawa, K., Wallis, S.R., Ohshima, C., Tamura, A., Kawamoto, T., Yasumoto, A., Ishikawa, A. and Kogiso, T.
Organizer
日本鉱物科学会2019年年会
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[Presentation] Isotope geochemistry of metacarbonate rocks in continental collision zones as proxies for estimating the sedimentation age and understanding the tectonic setting of deposition.2019
Author(s)
Satish Kumar, M., Imura, A., Shirakawa, M., Shimoda, G., Goto, K.T., Malaviarachchi, S.P.K.
Organizer
XIII International Symposium on Antarctic Earth Science (ISAES 2019)
Int'l Joint Research
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[Presentation] Behaviour of C, O, Sr, Nd and Pb isotopes in high-grade metacarbonate rocks.2019
Author(s)
Satish Kumar, M., Imura, A., Shirakawa, M., Shimoda, G., Goto, K.T., Malaviarachchi, S.P.K.
Organizer
日本地球惑星科学連合2019年大会
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[Presentation] P-wave velocity of Fe3S under high pressure and temperature2019
Author(s)
Kamada, S., Terasaki, H., Fukui, H., Sakamaki,T., Uchiyama, H., Tsutsui, S., Ohtani, E., Alfred Q.R. Baron
Organizer
JpGU2019
Int'l Joint Research
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[Presentation] Density measurements of crystalline Fe and amorphous materials at high pressure2019
Author(s)
Kamada, S., Terasaki, H., Takubo, Y., Tsuruoka, R., Maeda, F., Yamada, R., Kawaguchi, S. I., Hirao, N., Machida, A.
Organizer
日本地球惑星科学連合2019年大会
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[Presentation] Ultralow-velocity zones possibly explained by light element-enriched iron compounds2019
Author(s)
Liang Yuen, Ohtani, E., Ziang Wu, Shengxuan Huang, Ikuta, D., Sakamaki, T., Kamada, S., Fukui, H., Tsutsui, S., Uchiyama, H., Ishikawa, D., Hirao, N., Alfred Q.R. Baron
Organizer
JpGU2019
Int'l Joint Research
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[Presentation] Density measurement of liquid gallium using externally heated diamond anvil cell2019
Author(s)
Terasaki, R., Terasaki, H., Kamada, S., Yamada, I., Maeda, F., Kondo, T., Urakawa, S., Hirao, N., Machida, A.
Organizer
日本地球惑星科学連合2019年大会
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[Presentation] Melt transport and compositional heterogeneity of the mantle: a case study of peridotite, dunite, and wehrlite from Atlantis Massif.2019
Author(s)
Akizawa, N., Fruh-Green, G.L., Tamura, A., Tamura, C. and Morishita, T.
Organizer
日本地球惑星科学連合2019年大会
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