Melting relationships in the Fe-light elements system under outer core conditions

• Project/Area Number: 25800291
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Tohoku University
• Principal Investigator: Kamada Seiji 東北大学, 学際科学フロンティア研究所, 助教 (30611793)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 地球核 / 圧力媒体 / 静水圧性 / 高圧高温 / 放射光 / ダイヤモンドアンビルセル / 高温高圧 / 鉱物物理学 / 放射光メスバウア分光法 / 非弾性X線散乱 / 高圧 / 高温 / 放射光メスバウア分光 / 熱伝導率

Outline of Final Research Achievements

I have studied the physical properties of the Earth’s core using a diamond anvil cell. I used synchrotron radiation in order to know crystal structures, states of electron of Fe, and sound velocities of samples. The phase relationships in the Fe-S system were investigated over 200 GPa and Fe3S was stable up to 230 GPa and 3000 K. I investigated pressure distribution in the alkali halides such as KBr, KCl, and NaCl under high pressure. KCl and KBr seem to be good pressure media and thermal insulators. The magnetic property of Fe3S were studied using Synchrotron Mossbauer Spectrocopy and its magnetic property disappeared above 20 GPa. The sound velocities of Fe3S were measured based on inelastic X-ray scattering up to 50 GPa and 1900 K in order to discuss the Martian core. Electronic state of Fe in FeO was also investigated based on Synchrotron Mossbauer Spectrocopy under high pressure and temperature.

Research Products

• [Journal Article] Electrical conductivity model of of Al-bearing bridgmanite with implications for the electrical structure of the Earth's lower mantle (2016)
  • Author(s): T. Yoshino, S. Kamada, C. Zhao, E. Ohtani, and N. Hirao
  • Journal Title: Earth and Planetary Science Letters Volume: 434 Pages: 208-219
  • DOI: 10.1016/j.epsl.2015.11.032
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Magnetic and spin transitions in wüstite: A synchrotron Mössbauer spectroscopic study (2016)
  • Author(s): M. Hamada, S. Kamada, E. Ohtani, T. Mitsui, R. Masuda, T. Sakamaki, N. Suzuki, F. Maeda and M. Akasaka
  • Journal Title: Physical Review B Volume: 93 Issue: 15 Pages: 155165-155165
  • DOI: 10.1103/physrevb.93.155165
  • Peer Reviewed
• [Journal Article] Constraints on Earth's inner core composition inferred from measurements of the sound velocity of hcp-iron in extreme conditions (2016)
  • Author(s): T. Sakamaki, E. Ohtani, H. Fukui, S. Kamada, S. Takahashi, T. Sakairi, A. Takahata, T. Sakai, S. Tsutsui, D. Ishikawa, R. Shiraishi, Y. Seto, T. Tsuchiya, and A. Q. R. Baron
  • Journal Title: Science Advances Volume: 2 Issue: 2 Pages: 2-2
  • DOI: 10.1126/sciadv.1500802
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Sound velocity measurement by inelastic X-ray scattering at high pressure and temperature by Resistive heating diamond anvil cell (2015)
  • Author(s): Ohtani, E., K. Mibe, T. Sakamaki, S. Kamada, S. Takahashi, H. Fukui, S. Tsutsui, A.Q.R. Baron
  • Journal Title: Russian Geology and Geophysics Volume: 56 Issue: 1-2 Pages: 203-208
  • DOI: 10.1016/j.rgg.2015.01.012
  • Peer Reviewed
• [Journal Article] Stability of hydrous phase H MgSiO4H2 under lower mantle conditions (2014)
  • Author(s): Ohtani, E., Y. Amaike, S. Kamada, T. Sakamaki, and N. Hirao.
  • Journal Title: Geophysical Research Letters Volume: 41 Issue: 23 Pages: 8283-8287
  • DOI: 10.1002/2014gl061690
  • Peer Reviewed
• [Journal Article] The abundance of potassium in the Earth's core (2014)
  • Author(s): Watanabe, K., E. Ohtani, S. Kamada, T. Sakamaki, M. Miyahara, Y. Ito
  • Journal Title: Physics of the Earth and Planetary Interiors Volume: 237 Pages: 65-72
  • DOI: 10.1016/j.pepi.2014.10.001
  • Peer Reviewed
• [Journal Article] Equation of state of Fe3S at room temperature up to 2 megabars (2014)
  • Author(s): Kamada S., Ohtani E., Terasaki H., Sakai T., Takahashi S., Hirao N., Ohishi Y.
  • Journal Title: Physics of the Earth and Planetary Interiors Volume: 228 Pages: 106-113
  • DOI: 10.1016/j.pepi.2013.11.001
  • Peer Reviewed
• [Journal Article] The sound velocity measurements of Fe3S (2014)
  • Author(s): eiji Kamada, Eiji Ohtani, Hiroshi Fukui, Takeshi Sakai, Hidenori Terasaki, Suguru Takahashi, Yuki Shibazaki, Satoshi Tsutsui, Alfred Q. R. Baron, Naohisa Hirao, Yasuo Ohishi
  • Journal Title: American Mineralogist Volume: 99 Issue: 1 Pages: 98-101
  • DOI: 10.2138/am.2014.4463
  • Peer Reviewed
• [Presentation] Metal-silicate partitioning in ultra-high temperature and high pressure conditions (2016)
  • Author(s): Sei Sato, Eiji Ohtani, Seiji Kamada, Shin Ozawa, Tatsuya Sakamaki
  • Organizer: Water Dynamics-13
  • Place of Presentation: 仙台
  • Year and Date: 2016-03-15
  • Int'l Joint Research
• [Presentation] Pressure-Induced Change of Iron Electronic Environment in Basaltic Glass (2016)
  • Author(s): Fumiya Maeda, Seiji Kamada, Eiji Ohtani, Nanami Suzuki, Tatsuya Sakamaki, Naohisa Hirao, Takaya Mitsui, Ryo Masuda, Satoshi Nakano
  • Organizer: Water Dynamics-13
  • Place of Presentation: 仙台
  • Year and Date: 2016-03-15
  • Int'l Joint Research
• [Presentation] Partition experiment between solid and liquid metal in the Fe-Ni-O-S-Si system (2016)
  • Author(s): Ryosuke Tanaka, Eiji Ohtani, Seiji Kamada, Tatsuya Sakamaki, Ozawa Shin
  • Organizer: Water Dynamics-13
  • Place of Presentation: 仙台
  • Year and Date: 2016-03-15
  • Int'l Joint Research
• [Presentation] Core formation process and light elements in the planetary core (2015)
  • Author(s): Ohtani E., Sakairi T., Watanabe K., Kamada S., Sakamaki T., Hirao N.
  • Organizer: AGU Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2015-12-14
  • Int'l Joint Research
• [Presentation] Electrical conductivity of Al-bearing bridgmantite (2015)
  • Author(s): Yoshino T., Kamada S., Ohtani E., Hirao N.
  • Organizer: AGU Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2015-12-14
  • Int'l Joint Research
• [Presentation] 鉄-軽元素系の融解関係と地球核の温度構造 (2015)
  • Author(s): 鎌田誠司，鈴木那奈美，前田郁也，寺崎英紀，大谷栄治，平尾直久，大石泰生，福井宏之，Alfred Q.R. Baron
  • Organizer: 固体フォーラム
  • Place of Presentation: 東京大学
  • Year and Date: 2015-12-12
  • Invited
• [Presentation] 高圧下における鉄‐軽元素系の融解関係：地球核の温度構造への応用 (2015)
  • Author(s): 鎌田誠司，坂入崇紀，高畑明拓，小林幸太，高橋豪，寺崎英紀，大谷栄治，平尾直久，大石泰生
  • Organizer: 第56回高圧討論会
  • Place of Presentation: 広島
  • Year and Date: 2015-11-10
  • Invited
• [Presentation] Alを含むブリッジマナイトの電気伝導モデル (2015)
  • Author(s): 芳野極，鎌田誠司，大谷栄治，平尾直久
  • Organizer: 第56回高圧討論会
  • Place of Presentation: 広島
  • Year and Date: 2015-11-10
• [Presentation] 高温高圧下での非弾性Ｘ線散乱による鉄-ニッケル合金の音速測定 (2015)
  • Author(s): 坂巻竜也，大谷栄治，福井宏之，鎌田誠司，坂入崇紀，筒井智嗣，Baron Alfred
  • Organizer: 第56回高圧討論会
  • Place of Presentation: 広島
  • Year and Date: 2015-11-10
• [Presentation] 高温高圧下におけるFe-Si合金の磁気転移・構造転移と圧縮挙動 (2015)
  • Author(s): 鈴木那奈美，大谷栄治，鎌田誠司，平尾直久，前田郁也，大石泰生，中野智志
  • Organizer: 第56回高圧討論会
  • Place of Presentation: 広島
  • Year and Date: 2015-11-10
• [Presentation] 下部マントル条件下における玄武岩質ガラスの放射光メスバウアー分光測定 (2015)
  • Author(s): 前田郁也，大谷栄治，鎌田誠司，坂巻竜也，鈴木那奈美，平尾直久，大石泰生，三井隆也，増田亮，中野智志
  • Organizer: 第56回高圧討論会
  • Place of Presentation: 広島
  • Year and Date: 2015-11-10
• [Presentation] 高圧下における放射光メスバウア分光法を用いたFe3Sの磁性転移とFeOの電子状態 (2015)
  • Author(s): 鎌田誠司，平尾直久，鈴木那奈美，前田郁也，濱田麻希，大谷栄治，大石泰生，増田亮，三井隆也
  • Organizer: 日本鉱物科学会2015年年会・総会
  • Place of Presentation: 東京大学
  • Year and Date: 2015-09-25
• [Presentation] 核の形成過程と核の軽元素 (2015)
  • Author(s): 大谷栄治，渡邉虹水，坂入崇紀，鎌田誠司，坂巻竜也，平尾直久，大石泰生
  • Organizer: 日本鉱物科学会2015年年会・総会
  • Place of Presentation: 東京大学
  • Year and Date: 2015-09-25
• [Presentation] 放射光メスバウア分光とXRDを用いた地球物質の高温高圧その場観察 (2015)
  • Author(s): 鎌田誠司，平尾直久，大谷栄治，浜田麻希，鈴木那奈美，前田郁也，大石泰生，増田亮，三井隆也
  • Organizer: SPring-8シンポジウム2015
  • Place of Presentation: 九州大学伊都キャンパス
  • Year and Date: 2015-09-13
• [Presentation] Melting relationships of the Fe-light elements systems under high pressures (2015)
  • Author(s): Kamada, S., Sakairi, T., Takahata, A., Kobayashi, K., Takada, H., Takahashi, S., Terasaki, H., Ohtani, E., Hirao, N., Ohishi, Y.
  • Organizer: Advances in high Pressure Research II: Deepest Understanding 2015
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2015-08-29
  • Int'l Joint Research
• [Presentation] Electronic environment of iron in basaltic glass at high pressure (2015)
  • Author(s): Maeda F., Ohtani E., Kamada S., Sakamaki T., Suzuki N., Hirao N., Ohishi Y., Mitsui T., Masuda R.
  • Organizer: Advances in high Pressure Research II: Deepest Understanding 2015
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2015-08-29
  • Int'l Joint Research
• [Presentation] High-pressure limits of 10Å phase stability (2015)
  • Author(s): Rashchenko, SV., Kamada, S., Ohtani, E.
  • Organizer: Advances in high Pressure Research II: Deepest Understanding – 2015
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2015-08-29
  • Int'l Joint Research
• [Presentation] Sound velocity of iron alloys and composition of the core (2015)
  • Author(s): Ohtani E., Sakamaki T., Kamada S., Shibazaki Y., Takahashi S., Fukui H., Tsutsui S., Baron A. Q.
  • Organizer: Goldschmidt2015
  • Place of Presentation: Prague
  • Year and Date: 2015-08-16
  • Int'l Joint Research
• [Presentation] Hydrostaticity and equation of states of NaCl, KCl, KBr up to 70 GPa at room temperature (2015)
  • Author(s): Kamada S., Maeda F., Takahata A., Amaike Y., Ohtani E., Hirao N., Ohishi Y.
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 千葉
  • Year and Date: 2015-05-24
  • Int'l Joint Research
• [Presentation] Spin state of iron in MORB glass up to the lowermost mantle conditions (2015)
  • Author(s): Maeda F., Ohtani E., Kamada S., Suzuki N., Sakamaki T., Hirao N., Ohishi Y., Mitsui T., Masuda R.
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 千葉
  • Year and Date: 2015-05-24
  • Int'l Joint Research
• [Presentation] Single-crystal elastic property of bridgmanite and seismic anomalies in the lower mantle (2015)
  • Author(s): Fukui H., Yoneda A., Kamada S., Ohtani E., Baron A.
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 千葉
  • Year and Date: 2015-05-24
  • Int'l Joint Research
• [Presentation] The formation of super-deep diamonds in the subductin MgCO3-SiO2 system into the lower mantle (2015)
  • Author(s): Fumiya Maeda, Eiji Ohtani, Seiji Kamada, Sakamaki Tatsuya, Naohisa hirao, Yasuo Ohishi
  • Organizer: 12th International Workshop on Water Dynamics
  • Place of Presentation: 仙台
  • Year and Date: 2015-03-09 – 2015-03-10
• [Presentation] Structural and Magnetic transition in Fe-Si alloys at High pressure and temperature (2015)
  • Author(s): Nanami Suzuki, Eiji Ohtani, Seiji Kamada, Naohisa Hirao, Fumiya Maeda
  • Organizer: 12th International Workshop on Water Dynamics
  • Place of Presentation: 仙台
  • Year and Date: 2015-03-09 – 2015-03-10
• [Presentation] 高温高圧実験で探る地球深部由来のダイヤモンドの成因 (2015)
  • Author(s): 前田郁也，大谷栄治，鎌田誠司，坂巻竜也，平尾直久，大石泰生
  • Organizer: 第8回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開拓」
  • Place of Presentation: 仙台
  • Year and Date: 2015-02-20
• [Presentation] Stability of hydrous phase H MgSiO2(OH)2 under the lower mantle conditions (2014)
  • Author(s): Eiji Ohtani, Yohei Amaike, Seiji Kamada, Tatsuya Sakamaki, Naohisa Hirao
  • Organizer: AGU Fall Meeting 2014
  • Place of Presentation: San Francisco
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] Melting relations in the Fe-S-Si system at high pressure and temperature: Implications for the thermal structures of the planetary cores (2014)
  • Author(s): Takanori Sakairi, Eiji Ohtani, Takeshi Sakai, Seiji Kamada, Tatsuya Sakamaki, Naohisa Hirao
  • Organizer: AGU Fall Meeting 2014
  • Place of Presentation: San Francisco
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] The carbon-bearing phases in the subducted slabs under the lower mantle condition (2014)
  • Author(s): Fumiya Maeda, Eiji Ohtani, Seiji Kamada, Tatsuya Sakamki, Yasuo Ohishi, Naohisa Hirao
  • Organizer: AGU Fall Meeting 2014
  • Place of Presentation: San Francisco
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] Sound velocity and density of Hcp-Fe under Earth's core conditions (2014)
  • Author(s): Tatsuya Sakamaki, Eiji Ohtani, Hiroshi Fukui, Seiji Kamada, Suguru Takahashi, Takanori Sakairi, Akihiro Takahata, Takeshi Sakai, Satoshi Tsutsui, Alfred Q.R. Baron
  • Organizer: AGU Fall Meeting 2014
  • Place of Presentation: San Francisco
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] Compression and magnetic properties of Fe-Si alloys at high pressure (2014)
  • Author(s): Nanami Suzuki, Seiji Kamada, Eiji Ohtani, Naohisa Hirao, Maki Hamada, Tatsuya Sakamaki, Yasuo Ohishi, Takaya Mitsui, Ryo Masuda
  • Organizer: AGU Fall Meeting 2014
  • Place of Presentation: San Francisco
  • Year and Date: 2014-12-15 – 2014-12-19
• [Presentation] 高温高圧下における含水H相ーδ相固溶体(MgSi,Al2)O2(OH)2の安定領域と下部マントルの水 (2014)
  • Author(s): 大谷栄治，天池洋平，鎌田誠司，坂巻竜也，増野いづみ，村上元彦，鈴木昭夫，平尾直久
  • Organizer: 第55回高圧討論会
  • Place of Presentation: 徳島
  • Year and Date: 2014-11-22 – 2014-11-24
• [Presentation] 70 GPaまでのアルカリハライドの静水圧性と状態方程式 (2014)
  • Author(s): 鎌田誠司，前田郁也，高畑明拓，天池洋平，大谷栄治，平尾直久，大石泰生
  • Organizer: 第55回高圧討論会
  • Place of Presentation: 徳島
  • Year and Date: 2014-11-22 – 2014-11-24
• [Presentation] Stability of hydrous phase h-δ solid solution in the lower mantle (2014)
  • Author(s): Eiji Ohtani, Yohei Amaike, Itaru Ohira, Seiji Kamada, Tatsuya Sakamaki, Suzuki Akio
  • Organizer: International Symposium “Advances in High Pressure Research: Breaking scales and horizons” (Joint Research Projects/ Seminars, JSPS)
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2014-09-22 – 2014-09-26
  • Invited
• [Presentation] Physical properties of iron alloys and light elements in the core (2014)
  • Author(s): Eiji Ohtani, Tatsuya Sakamaki, Seiji Kamada, Yuki Shibazaki, Hiroshi Fukui, Alfred Q.R. Baron
  • Organizer: International Symposium “Advances in High Pressure Research: Breaking scales and horizons” (Joint Research Projects/ Seminars, JSPS)
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2014-09-22 – 2014-09-26
• [Presentation] Sound velocities and densities of Fe3S at high pressure: Implication for the Earth's inner core (2014)
  • Author(s): Seiji Kamada, Eiji Ohtani, Hidenori Terasaki, Takeshi Sakai, Suguru Takahashi, Hiroshi Fukui, Alfred Q.R. Baron, Naohisa Hirao, Yasuo Ohishi
  • Organizer: International Symposium “Advances in High Pressure Research: Breaking scales and horizons” (Joint Research Projects/ Seminars, JSPS)
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2014-09-22 – 2014-09-26
• [Presentation] Compression and magnetic properties of Fe-Si alloy using synchrotron radiation Mossbauer spectroscopy at high pressure (2014)
  • Author(s): Nanami Suzuki, Eiji Ohtani, Naohisa Hirao, Seiji Kamada, Maki Hamada, Tatu\suya Sakamaki, Yasuo Ohishi, Takaya Mitsui, Ryo Masuda
  • Organizer: International Symposium “Advances in High Pressure Research: Breaking scales and horizons” (Joint Research Projects/ Seminars, JSPS)
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2014-09-22 – 2014-09-26
• [Presentation] The reactions in the MgCO3-SiO2 system in the slabs subcuted into the lower mantle and formation of deep diamond (2014)
  • Author(s): Fumiya Maeda, Eiji Ohtani, Seiji Kamada, Tatsuya Sakamaki, Yasuo Ohishi, Naohisa Hirao
  • Organizer: International Symposium “Advances in High Pressure Research: Breaking scales and horizons” (Joint Research Projects/ Seminars, JSPS)
  • Place of Presentation: Novosibirsk, Russia
  • Year and Date: 2014-09-22 – 2014-09-26
• [Presentation] 放射光メスバウア分光とXRD同時測定による鉄の電子状態と結晶構造 (2014)
  • Author(s): 鎌田誠司，平尾直久，大谷栄治，浜田麻希，鈴木那奈美，前田郁也，大石泰生，増田亮，三井隆也
  • Organizer: SPring-8シンポジウム2014
  • Place of Presentation: 東京
  • Year and Date: 2014-09-14
• [Presentation] BL10XUメスバウア複合測定 (2014)
  • Author(s): 鎌田誠司
  • Organizer: 「地球惑星科学」「高圧物質科学」合同研究会
  • Place of Presentation: 東京
  • Year and Date: 2014-09-12 – 2014-09-13
  • Invited
• [Presentation] 高圧力下でのFe3Sの磁性的弾性的特徴：地球型惑星核への応用 (2014)
  • Author(s): 鎌田誠司，大谷栄治，平尾直久，鈴木那奈美，寺崎英紀，高橋豪，福井宏之，浜田麻希，Alfred Q.R. Baron，増田亮，三井隆也，大石泰生
  • Organizer: 月・火星・水星内部研究会
  • Place of Presentation: 大阪
  • Year and Date: 2014-09-08 – 2014-09-09
• [Presentation] A new water reservoir hydrous phase H and phase delta solid solution MgSiO2(OH)2-AlOOH in teh lower mantle (2014)
  • Author(s): Eiji Ohtani, Yohei Amaike, Itaru Ohira, Seiji Kamada, Tatsuya Sakamaki, Naohisa Hirao
  • Organizer: IMA2014
  • Place of Presentation: South Africa
  • Year and Date: 2014-09-01 – 2014-09-05
• [Presentation] Sound velocity of hcp-Fe to 160 GPa and 3000 K, and implications for the inner core composition (2014)
  • Author(s): Eiji Ohtani, Tatsuya Sakamaki, Seiji Kamada, Hiroshi Fukui, Kenji Mibe, Satoshi Tsutsui, Alfred Q.R. Baron
  • Organizer: Asia Oceania Geosciences Society (AOGS) 2014
  • Place of Presentation: 札幌
  • Year and Date: 2014-07-28 – 2014-08-01
• [Presentation] Hydrogen transport into the bottom of the lower mantle by phase H- phase delta solid solution MgSiO2(OH)2-AlOOH (2014)
  • Author(s): Eiji Ohtani, Yohei Amaike, Itaru Ohira, Seiji Kamada, Tatsuya Sakamaki, Naohisa Hirao
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Stability of Hydrous phase H MgSiO2(OH)2 in the lower mantle (2014)
  • Author(s): Yohei Amaike, Eiji Ohtani, Seiji Kamada, Tatsuya Sakamaki, Suguru Takahashi, Naohisa Hirao, Yasuo Ohishi
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] The reaction between MgCO3 and SiO2 at high pressure and temperature and genesis of ultra-deep diamonds (2014)
  • Author(s): Fumiya Maeda, Eiji Ohtani, Seiji Kamada, Tatsuya Sakamaki, Suguru Takahashi, Akihiro Takahata, Yasuo Ohishi, Naohisa Hirao
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Elemental partitioning in the Fe-S-Si system ag high pressure and temperature: Implications for the Earth's core (2014)
  • Author(s): Takanori Sakairi, Eiji Ohtani, Takeshi Sakai, Seiji Kamada, Masaaki Miyahara, Naohisa Hirao
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Potassium solubility into the Earth’s core at the base of the magma ocean- Implication for the heat source of the core (2014)
  • Author(s): Kousi Watanabe, Eiji Ohtani, Seiji Kamada, Tatsuya Sakamaki, Masaaki Miyahara
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Synchrotron Mossbauer spectroscopy on Fe3S, FeO and natural almandine (2014)
  • Author(s): Seiji Kamada, Naohisa Hirao, Maki Hamada, Nanami Suzuki, Eiji Ohtani, Yasuo Ohishi, Ryo Masuda, Takaya Mitsui
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Study of physical properties of Fe-Si alloy at high pressureusing using synchrotron radiation Mossbauer spectroscopy (2014)
  • Author(s): Nanami Suzuki, Eiji Ohtani, Naohisa Hirao, Seiji Kamada, Maki Hamada, Tatsuya Sakamaki, Yasuo Ohishi, Ryo Masuda, Takaya Mitsui
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Compressional sound velocity and density measurements of hcp-Fe under core conditions (2014)
  • Author(s): Tatsuya Sakamaki, Eiji Ohtani, Hiroshi Fukui, Seiji Kamada, Suguru Takahashi, Takanori Sakairi, Akihiro Takahata, Takeshi Sakai, Satoshi Tsutsui, Alfred Q.R. Baron
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] VP and EOS of Fe3S
  • Author(s): Kamada, S., Ohtani, E., Fukui, H., Sakai, T., Terasaki, H., Shibazaki, Y., Tsutsui, S., Baron, A.Q.R., Hirao, N., Ohishi, Y.
  • Organizer: RIKEN SPring-8 Center Workshop on “Elastic Properties of Iron in Extreme Conditions”
  • Place of Presentation: 兵庫県宝塚市
• [Presentation] Amount of sulfur in the inner core based on sound velocities and EOS of Fe3S at high pressures
  • Author(s): Kamada, S., Ohtani, E., Terasaki, H., Sakai, T., Takahashi, S., Fukui, H., Baron, A.Q.R., Hirao, N., Ohishi, Y.
  • Organizer: JpGU 2013 meeting
  • Place of Presentation: 千葉県千葉市幕張
• [Presentation] Sound velocity measurements of iron-light element alloys: A challenge to the core conditions
  • Author(s): Ohtani, E., Sakamaki, T., Kamada, S., Fukui, H., Shibazaki, Y., Takahashi, S., Sakai, T., Tsutsui, S., Baron, A.Q.R.
  • Organizer: RIKEN SPring-8 Center Workshop on “Elastic Properties of Iron in Extreme Conditions”
  • Place of Presentation: 兵庫県宝塚市
• [Presentation] Sound velocity of iron up to 160 Gigapascals and 3000 kelvin
  • Author(s): Sakamaki, T., Ohtani, E., Fukui, H., Kamada, S., Takahashi, S., Sakairi, T., Takahata, A., Sakai, T., Tsutsui, S., Baron, A.Q.R.
  • Organizer: RIKEN SPring-8 Center Workshop on “Elastic Properties of Iron in Extreme Conditions”
  • Place of Presentation: 兵庫県宝塚市
• [Presentation] ound velocity-density relation for dhcp-FeH using inelastic X-ray scattering and in situ X-ray diffractions methods
  • Author(s): Shibazaki, Y., Ohtani, E., Fukui, H., Kamada, S., Sakai, T., Tsutsui, S., Baron, A.Q.R., Hirao, N.
  • Organizer: RIKEN SPring-8 Center Workshop on “Elastic Properties of Iron in Extreme Conditions”
  • Place of Presentation: 兵庫県宝塚市
• [Presentation] The stable phase in the MgCO3-SiO2 system under the lower mantle conditions and formation of ultra deep diamonds
  • Author(s): Maeda, F., Ohtani, E., Kamada, S., Sakamaki, T., Takahashi, S., Takahata, A.
  • Organizer: 11th International Workshop on Water Dynamics
  • Place of Presentation: 宮城県仙台市
• [Presentation] Stability field of phase H MgSiO2(OH)2 at lower mantle condition
  • Author(s): Amaike, Y., Ohtani, E., Kamada, S., Sakamaki, T., Takahashi, S., Hirao, N., Ohishi, Y.
  • Organizer: 11th International Workshop on Water Dynamics
  • Place of Presentation: 宮城県仙台市
• [Presentation] 高圧・高温下でのFe-NiおよびFe-Ni-Si合金の誘拐および相関係
  • Author(s): 高畑明拓，大谷栄治，鎌田誠司，坂巻竜也，宮原正明，平尾直久
  • Organizer: 東北大学大学院理学研究科 第7回 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興隆」
  • Place of Presentation: 宮城県仙台市
• [Presentation] Stability and melting relations of Fe3C up to 3 Mbar: Implication for the carbon in the Earth’s inner core
  • Author(s): Takahashi, S., Ohtani, E., Sakai, T., Mashino, I., Kamada, S., Miyahara, M., Sakamaki, T., Hirao, N., Ohishi, Y.
  • Organizer: AGU fall meeting 2013
  • Place of Presentation: San Francisco, California, USA
• [Presentation] The melting and phase relations of Fe-Ni and Fe-Ni-Si alloys up to 100 GPa
  • Author(s): Takahata, A., Ohtani, E., Kamada, S., Sakamaki, T., Hirao, N.
  • Organizer: AGU fall meeting 2013
  • Place of Presentation: San Francisco, California, USA
• [Presentation] The abundance of potassium in the Earth’s core
  • Author(s): Watanabe, K., Ohtani, E., Kamada, S., Miyahara, M.
  • Organizer: AGU fall meeting 2013
  • Place of Presentation: San Francisco, California, USA
• [Presentation] 下部マントル条件下におけるウスタイトおよびフェロペリクレースのスピン転移
  • Author(s): 浜田麻希，大谷栄治，鎌田誠司，坂巻竜也，平尾直久，大石泰生，三井隆也，増田亮
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 新潟
• [Presentation] 高温高圧下におけるFe-S-Si系の元素分配
  • Author(s): 坂入崇紀，大谷栄治，境毅，鎌田誠司，宮原正明，平尾直久
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 新潟
• [Presentation] 高温高圧下におけるカリウム分配実験－地球角柱のカリウム存在量および熱量の推定
  • Author(s): 渡邉虹水，大谷栄治，鎌田誠司，宮原正明
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 新潟
• [Presentation] 高圧下における放射光X線回折・メスバウアー分光複合同時測定法の開発
  • Author(s): 平尾直久，大石泰生，三井隆也，浜田麻希，松岡岳洋，鎌田誠司，大谷栄治
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 新潟
• [Presentation] レーザー加熱による高温高圧X線非弾性散乱によるhcp-Feの縦波速度測定
  • Author(s): 大谷栄治，坂巻竜也，福井宏之，鎌田誠司，高橋豪，坂入崇紀，高畑明拓，境毅，筒井聡，Baron Alfred
  • Organizer: 日本鉱物科学会2013年年会・総会
  • Place of Presentation: つくば
• [Presentation] 部マントル条件下におけるフェロペリクレースのスピン状態：放射光X線回折およびメスバウアー分光同時測定システムを用いた研究
  • Author(s): 浜田麻希，大谷栄治，鎌田誠司，坂巻竜也，平尾直久
  • Organizer: 日本鉱物科学会2013年年会・総会
  • Place of Presentation: つくば
• [Presentation] Sound velocity of iron-light-element alloys at high pressure and temperature and composition and thermal state of the inner core
  • Author(s): Ohtani, E., Sakai, T., Kamada, S., Sakamaki, T., Mibe, K., Shibazaki, Y., Fukui, H., Tsutsui, S., Baron, A.Q.R.
  • Organizer: JpGU 2013 meeting
  • Place of Presentation: 千葉県千葉市幕張
• [Presentation] Melting relation in the Fe-S-Si system at high pressure and temperature: Implications for the Earth’s core
  • Author(s): Sakairi, T., Ohtani, E., Sakai, T., Kamada, S., Miyahara, M., Hirao, N., Ohishi, Y.
  • Organizer: JpGU 2013 meeting
  • Place of Presentation: 千葉県千葉市幕張
• [Presentation] Melting relations and stability of Fe3C up to 230 GPa: Implication for the carbon in the Earth’s inner core
  • Author(s): Takahashi, S., Ohtani, E., Sakai, T., Miyahara, M., Kamada, S., Mashino, I., Hirao, N., Ohishi, Y.
  • Organizer: JpGU 2013 meeting
  • Place of Presentation: 千葉県千葉市幕張
• [Presentation] 高温高圧下における溶融金属鉄－珪酸塩融体間のカリウム分配への溶融鉄中軽元素の影響
  • Author(s): 渡邉虹水，大谷栄治，鎌田誠司，宮原正明
  • Organizer: 日本地球惑星科学連合2013大会
  • Place of Presentation: 千葉県千葉市幕張
• [Presentation] 135 GPaまでのFe-Ni-SiおよびFe-Ni合金の融解関係
  • Author(s): 高畑明拓，大谷栄治，鎌田誠司，宮原正明，坂巻竜也
  • Organizer: 日本地球惑星科学連合2013大会
  • Place of Presentation: 千葉県千葉市幕張