地球内核の組成と異方性の解明

• Project Area: Interaction and Coevolution of the Core and Mantle: Toward Integrated Deep Earth Science
• Project/Area Number: 16H01112
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Tohoku University
• Principal Investigator: 坂巻 竜也 東北大学, 理学研究科, 助教 (30630769)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000); Fiscal Year 2017: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
• Keywords: 地球核 / 高圧 / 高温 / 音速 / 密度

Outline of Annual Research Achievements

SPring-8のBL35XU、BL43LXUにおいてX線非弾性散乱とレーザー加熱式ダイアモンドアンビル高圧発生装置を組み合わせることで地球深部を再現した超高温高圧条件下での鉄・鉄合金（地球核の模擬物質）の音速を測定した。
純鉄：200GPaを超える超高圧下で微小鉄試料からのX線非弾性散乱の取得するための最適な測定系の構築を進めた。そのシステムを用いて試料由来の非常に弱いシグナルを得られることを確認し、300GPaまでの測定に成功した。また、X線に対して透明なベリリウムガスケットを用いることでダイアモンドアンビルセルの加圧軸に対して同軸と垂直軸の2方向からのX線非弾性散乱測定を試み、試料の選択配向性と音速の関連性を明らかにした。これらは内核の異方性解明に繋がる研究成果である。
酸化鉄：下部マントル条件下で音速を測定し、同条件下では下部マントル構成鉱物より速度が遅いことを明らかにした。最下部マントルで報告されている地震学的低速度域の存在は、外核との反応などによってマントル中に酸化鉄が富化されることによってもたらされる可能性を示した。
鉄-珪素合金：鉄-珪素合金の音速を高温高圧下で測定した。鉄の音速-密度データと比較することで鉄中に珪素が含まれることと音速と密度の両方を減少させることが分かった。実際の地球の内核は純鉄より音速・密度共に小さいため、この差を埋めるためには珪素の存在が効果的であり、核中に含まれている軽元素の有力候補として珪素が挙げられることを示した。
鉄-ニッケル合金：ニッケルが鉄中に含まれることで同じ温度圧力条件下で密度が増加し、音速が減少することを明らかにした。また、観測されている地球核の音速-密度の傾きを説明するためには内核中に化学組成のグラデーションが必要であることを示した。

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Sound velocity measurements of hcp Fe-Si alloy at high pressure and high temperature by inelastic X-ray scattering (2018)
  • Author(s): Takanori Sakairi, Tatsuya Sakamaki, Eiji Ohtani, Hiroshi Fukui, Seiji Kamada, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Q.R. Baron
  • Journal Title: American Mineralogist Volume: 103 Pages: 85-90
  • DOI: 10.2138/am-2018-6072
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 放射光X線で探る地球深部：地球の核組成の制約に向けて (2018)
  • Author(s): 坂巻竜也
  • Journal Title: SPring-8/SACLA利用者情報 Volume: 23 Pages: 14-17
  • Open Access
• [Journal Article] Density of hydrous magma (2017)
  • Author(s): Sakamaki Tatsuya
  • Journal Title: Chemical Geology Volume: 475 Pages: 135-139
  • DOI: 10.1016/j.chemgeo.2017.11.012
  • Peer Reviewed
• [Journal Article] Density of jadeite melts under high pressure and high temperature conditions (2017)
  • Author(s): SAKAMAKI Tatsuya
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 112 Issue: 5 Pages: 300-307
  • DOI: 10.2465/jmps.170128
  • NAID: 130006201316
  • Peer Reviewed
• [Journal Article] 高圧下でのマグマ物性：地球深部でのマグマの挙動解明 (2017)
  • Author(s): 坂巻竜也
  • Journal Title: 岩石鉱物科学, Volume: 46 Pages: 30-34
  • NAID: 130005475603
  • Peer Reviewed
• [Journal Article] Compressional sound velocity of hexagonal close-packed iron up to 163 GPa and 3000 K (2017)
  • Author(s): Sakamaki Tatsuya, Ohtani Eiji, Fukui Hiroshi, Baron Alfred Q.R.
  • Journal Title: Reseaech Frontiers 2016 Volume: － Pages: 92-93
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] 地球で一番深い場所－高圧実験から探る地球の中心核の化学組成－ (2017)
  • Author(s): 坂巻竜也
  • Journal Title: まなびの杜 Volume: 81 Pages: 3-4
  • Open Access
• [Journal Article] X線非弾性散乱を利用した高温高圧条件下での鉄合金の音速測定と地球内核組成の制約への適用 (2017)
  • Author(s): 坂巻竜也、大谷栄治、福井宏之、鎌田誠司、田中遼介、生田大穣、アルフレッドバロン、五島賢一
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 20GPaまでの鉄－珪素合金の弾性波速度測定 (2017)
  • Author(s): 坂巻竜也、寺﨑英紀、柴﨑裕樹、鈴木昭夫、戸邉宙、肥後祐司、西田圭佑、大橋智典
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 15 GPaまでのFe-Ni融体の音速と密度に与える硫黄の効果 (2017)
  • Author(s): 寺﨑英紀、坂巻竜也、柴﨑裕樹、西田圭佑、肥後祐司、下山裕太、神谷朝香、山田伊織、丹下義範
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 20GPaまでの鉄メルトの音速測定 (2017)
  • Author(s): 西田圭佑、寺﨑英紀、肥後祐司、柴﨑裕樹、坂巻竜也、下山裕太
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 高温高圧下における鉄・軽元素系化合物の相転移にともなう音速変化 (2017)
  • Author(s): 大谷栄治、坂巻竜也、福井宏之、鎌田誠司、田中遼祐、寺﨑英紀、生田大穣、アルフレッドバロン
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 高温高圧下での超音波法によるfcc-Feの弾性波速度測定 (2017)
  • Author(s): 柴﨑裕樹、寺﨑英紀、坂巻竜也、久野直毅、大橋智典
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 高温高圧下での地球核物質の音速-密度同時決定 (2017)
  • Author(s): 坂巻竜也、大谷栄治、福井宏之、田中遼介、生田大穣、アルフレッドバロン、袁亮
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 部分溶融メルトの弾性波速度測定と地震波低速度異常域への適用 (2017)
  • Author(s): 坂巻竜也、柴﨑裕樹、鈴木昭夫、大橋智典、肥後祐司、久野直毅
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 流紋岩マグマの破砕その場観察：4Dトモグラフィーと構造解析 (2017)
  • Author(s): 奥村聡、上杉健太朗、坂巻竜也
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 20GPaまでのFe-Sメルトの音速に及ぼす硫黄の効果の解明 (2017)
  • Author(s): 西田圭佑、寺﨑英紀、肥後祐司、柴﨑裕樹、山田伊織、坂巻竜也
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] 高温高圧下における鉄-軽元素合金の音速測定と内核の不均質性 (2017)
  • Author(s): 大谷栄治、坂巻竜也、生田大穣、福井宏之、鎌田誠司、田中遼祐、寺﨑英紀、生田大穣、袁亮、アルフレッドバロン、イゴールコーメッツ
  • Journal Title: SPring-8 Experimental Summary Report Volume: －
  • Open Access
• [Journal Article] Diamond formation in the deep lower mantle: a high- pressure reaction of MgCO3 and SiO2 (2017)
  • Author(s): Fumiya Maeda, Eiji Ohtani, Seiji Kamada, Tatsuya Sakamaki, Naohisa Hirao, Yasuo Ohishi
  • Journal Title: Scientific Reports Volume: 7 Pages: 40602-40602
  • DOI: 10.1038/srep40602
  • Peer Reviewed / Open Access
• [Journal Article] Melting relations in the Fe-S-Si system at high pressure and temperature: implications for the planetary core (2017)
  • Author(s): Sakairi, T., Ohtani, E., Kamada, S., Sakai, T., Sakamaki, T., Hirao, N.
  • Journal Title: Progress in Earth and Planetary Science Volume: 4:10 Pages: 1-11
  • DOI: 10.1186/s40645-017-0125-x
  • Peer Reviewed / Open Access
• [Journal Article] 高圧下でのマグマ物性：地球深部でのマグマの挙動解明 (2017)
  • Author(s): 坂巻竜也
  • Journal Title: 岩石鉱物科学 Volume: 46巻 Pages: 30-34
  • NAID: 130005475603
  • Peer Reviewed / Open Access
• [Journal Article] Preface for the article collection “High-Pressure Earth and Planetary Science in the last and next decade” (2016)
  • Author(s): T. Sakamaki, A. Suzuki, and B. Mysen
  • Journal Title: Progress in Earth and Planetary Science Volume: 3 Pages: 1-3
  • DOI: 10.1186/s40645-016-0114-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Magnetic and spin transitions in wustite: A synchrotron Mossbauer 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: Phys. Rev. B Volume: 93 Pages: 155165-155165
  • DOI: 10.1103/physrevb.93.155165
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Compressional and shear wave velocities for polycrystallinebcc-Fe up to 6.3 GPa and 800 K (2016)
  • Author(s): Y. Shibazaki, K. Nishida, Y. Higo, M Igarashi, M. Tahara, T. Sakamaki, H. Terasaki, Y. Shimoyama, S. Kuwabara, Y. Takubo, E. Ohtani
  • Journal Title: American Mineralogist Volume: 101 Pages: 1-11
  • DOI: 10.2138/am-2016-5545
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Determination of sound velocity of iron-alloy using inelastic X-ray scattering experiment under ultra-high pressure and temperature conditions (2016)
  • Author(s): Sakamaki, T., Fukui, H., Tanaka, R., Ohtani, E., Baron, A.Q.R.
  • Journal Title: SPring-8 Experimental Summary Report Volume: 2016A1180 Pages: 1-1
• [Journal Article] Sound velocity of Fe3S, FeO, and FeH at high pressure and temperatures, and implications for sound velocity anomalies at the inner core boundary (2016)
  • Author(s): Ohtani, E., Sakamaki, T.,, Fukui, H., Kamada, S., Tanaka, R.
  • Journal Title: SPring-8 Experimental Summary Report Volume: 2016A1171 Pages: 1-1
• [Journal Article] Study of physical properties of the core and lower mantle materials using synchrotron Mössbauer and X-ray diffraction method (2016)
  • Author(s): Ohtani, E., Kamada, S., Sakamaki, T.,, Fumiya, M., Sakairi, T., Ohira, I., Kuga, S.
  • Journal Title: SPring-8 Experimental Summary Report Volume: 2016A0104 Pages: 1-1
• [Journal Article] Simultaneous sound velocity and density measurements of iron-silicon alloys under core conditions of Mercury and Mars (2016)
  • Author(s): Sakamaki, T., Terasaki, H., Shibazaki, Y., Suzuki, A., Tobe, H., Higo, Y., Kurokawa, F., Maki, M., Shimoyama, Y., Saito, R.
  • Journal Title: SPring-8 Experimental Summary Report Volume: 2016B1111 Pages: 1-1
• [Journal Article] Simultaneous sound velocity and density measurements of iron-alloys for understanding the composition of Earth’s inner core (2016)
  • Author(s): Sakamaki, T., Fukui, H., Tanaka, R., Kamada, S., Ikuta, D., Ohtani, E., Baron, A.Q.R.
  • Journal Title: SPring-8 Experimental Summary Report Volume: 2016B1112 Pages: 1-1
• [Journal Article] Four-dimensional tomography and in-situ X ray diffraction of flowing magmas (2016)
  • Author(s): Okumura, S., Sakamaki, T., Uesugi, K.
  • Journal Title: SPring-8 Experimental Summary Report Volume: 2016B1253 Pages: 1-1
• [Journal Article] Sound velocity of iron-light element compounds at high pressure and temperature, and detection of the sound velocity anomalies near the transition boundary (2016)
  • Author(s): Ohtani, E., Sakamaki, T.,, Fukui, H., Kamada, S., Tanaka, R., Terasaki, H., Baron, A.Q.R.
  • Journal Title: SPring-8 Experimental Summary Report Volume: 2016B1419 Pages: 1-1
• [Journal Article] Sound velocity and density measurements of liquid Fe-Ni-Si up to 15 GPa (2016)
  • Author(s): Terasaki, H., Maki, M., Shimoyama, Y., Kurokawa, F., Saito, R., Sakamaki, T., Shibazaki, Y., Tobe, H., Higo, Y., Tange, Y.
  • Journal Title: SPring-8 Experimental Summary Report Volume: 2016B1518 Pages: 1-1
• [Presentation] マルチメガバールでの鉄の音速測定 (2017)
  • Author(s): 坂巻竜也，福井宏之，大谷栄治，田中遼介，アルフレッド・バロン
  • Organizer: 新学術領域研究「核‐マントル共進化」平成28年度成果発表会
  • Place of Presentation: 横浜
  • Year and Date: 2017-03-26
• [Presentation] Sound velocity of hcp-Fe at multi-megabar pressures (2017)
  • Author(s): Sakamaki, T., Fukui, H., Ohtani, E., Tanaka, R., Baron, A.Q.R.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] The sound velocity measurements of FeO at high pressure and temperature: Implications for the low velocity anomaly around the core-mantle boundary (2017)
  • Author(s): Tanaka, R., Sakamaki, T., Fukui, H., Ohtani, E., Kamada, S., Sato, S., Tsutsui, S., Uchiyama, H., Baron, A.Q.R., Suzuki, A.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Phase relations in the Fe-FeSi system at 10 GPa : Implications for Mercury’s core (2017)
  • Author(s): Tobe, H., Shibazaki, Y., Sakamaki, T., Hiroi, Y., Abe, R., Suzuki, A.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Experimental investigation into the cause of a high attenuation zone of the lunar seismic waves: A possible partialy molten layer at the lowest lunar mantle (2017)
  • Author(s): Igarashi, M., Shibazaki, Y., Shiraishi, R., Sakamaki, T., Suzuki, A.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Composition of the core: Geochemical and mineral physics constraints (2017)
  • Author(s): Ohtani, E., Sakairi, T., Sakamaki, T., Kamada, S., Tanaka, R., Fukui, H., Baron, A.Q.R.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] The heterogeneities in Lunar interior: Role of High Titanium materials (2017)
  • Author(s): Ohtani, E., Igarashi, M., Sakamaki, T., Zhao, D.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Phase relation in MgCO3-SiO2 system up to the lowermost mantle (2017)
  • Author(s): Maeda, F., Ohtani, E., Kamada, S., Sakamaki, T., Hirao, N., Ohishi, Y.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] High-pressure phase transitions of MgCO3 under the lower mantle conditions (2017)
  • Author(s): Maeda, F., Kamada, S., Sakamaki, T., Hirao, N., Ohishi, Y., Suzuki, A.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Interior structure of Mars estimated from elastic properties of liquid Fe-Ni-S (2017)
  • Author(s): Terasaki, H., Shimoyama, Y., Maki, M., Kurokawa, F., Urakawa, S., Nishida, K., Saito, R., Takubo, Y., Shibazaki, Y., Sakamaki, T., Machida, A., Higo, Y., Kondo, T.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Basaltic glass structure by time-of-flight neutron diffraction (2017)
  • Author(s): Sakamaki, T., Hattori, T., Sano-Furukawa, A.
  • Organizer: Goldschmidt 2017
  • Int'l Joint Research
• [Presentation] Geochemical and mineral physics constraints on the composition of the inner core (2017)
  • Author(s): Ohtani, E., Sakamaki, T., Sakairi, T., Tanaka, R., Kamada, S., Fukui, H., Barao, A.Q.R.
  • Organizer: Goldschmidt 2017
  • Int'l Joint Research
• [Presentation] Densification of calcium-aluminum-silicate glass at the pressure of ~5.5 GPa (2017)
  • Author(s): Nakajima, A., Sakamaki, T., Hisano, N., Horioka, Y., Suzuki, A.
  • Organizer: 55th EHPRG Meeting
  • Int'l Joint Research
• [Presentation] Phase relations of MgCO3 high-pressure carbonate under the lower mantle conditions (2017)
  • Author(s): Maeda, F., Kamada, S., Sakamaki, T., Miyajima, N., Hirao, N., Ohishi, Y., Suzuki, A.
  • Organizer: 55th EHPRG Meeting
  • Int'l Joint Research
• [Presentation] Structure measurement of basaltic glass using neutron diffraction (2017)
  • Author(s): Sakamaki, T.
  • Organizer: High-Pressure Mineral Physics Seminar
  • Int'l Joint Research
• [Presentation] Sound velocity of iron-light element compounds and composition of the inner core (2017)
  • Author(s): Ohtani, E., Sakamaki, T., Kamada, S., Ikuta, D., Tanaka, R., Fukui, H., Baron, A.Q.R.
  • Organizer: High-Pressure Mineral Physics Seminar
  • Int'l Joint Research
• [Presentation] Compressibility of MgCO3 phase II under the lowermost mantle conditions (2017)
  • Author(s): Maeda, F., Kamada, S., Sakamaki, T., Hirao, N., Ohishi, Y., Suzuki, A.
  • Organizer: High-Pressure Mineral Physics Seminar
  • Int'l Joint Research
• [Presentation] Sound velocity and elastic properties of liquid Fe-Ni-Si at high pressure (2017)
  • Author(s): Terasaki, H., Maki, M., Shimoyama, Y., Nishida, K., Urakawa, S., Takubo, Y., Shibazaki, Y., Sakamaki, T., Higo, Y., Machida, A., Kondo, T.
  • Organizer: High-Pressure Mineral Physics Seminar
  • Int'l Joint Research
• [Presentation] Structure measurements of basaltic glass at high pressure using X-ray and neutron diffraction techniques (2017)
  • Author(s): Ohashi, T., Sakamaki, T., Hattori, T., Sano-Furukawa, A., Funakoshi, K., Suzuki, A.
  • Organizer: The 5th Workshop for Extreme Materials Science “Silicate Melt/Glass”
  • Int'l Joint Research
• [Presentation] Structures of basaltic glass under high pressure by in-situ X-ray and neutron diffraction investigations (2017)
  • Author(s): Ohashi, T., Sakamaki, T., Hattori, T., Sano-Furukawa, A., Funakoshi, K., Suzuki, A.
  • Organizer: Interaction and Coevolution of the Core and Mantle Toward Integrated Deep Earth Science Internarional Symposium Annual General Meeting
  • Int'l Joint Research
• [Presentation] Melting experiments of hydrous peridotite under the top of the lower mantle conditions (2017)
  • Author(s): Nakajima, A., Sakamaki, T., Kawazoe, T., Suzuki, A.
  • Organizer: Interaction and Coevolution of the Core and Mantle Toward Integrated Deep Earth Science Internarional Symposium Annual General Meeting
  • Int'l Joint Research
• [Presentation] 放射光X線で探る地球深部：地球の核組成の制約に向けて (2017)
  • Author(s): 坂巻竜也
  • Organizer: SPring-8シンポジウム2017
  • Invited
• [Presentation] 高温高圧下での鉄-珪素合金の弾性波速度測定 (2017)
  • Author(s): 坂巻竜也、寺﨑英紀、柴﨑裕樹、戸邉宙、下山裕太、肥後祐司、鈴木昭夫
  • Organizer: 日本鉱物科学会2017年年会
• [Presentation] 音速測定と固液分配実験から測定する内核の組成 (2017)
  • Author(s): 大谷栄治、坂巻竜也、生田大穣、田中遼介、福井宏之、バロンアルフレッド
  • Organizer: 日本鉱物科学会2017年年会
• [Presentation] 圧力起因の玄武岩質ガラスの構造変化 (2017)
  • Author(s): 大橋智典、坂巻竜也、服部高典、佐野亜沙美、小澤信、舟越賢一、鈴木昭夫
  • Organizer: 日本鉱物科学会2017年年会
• [Presentation] 高温高圧実験によるアノーサイトメルトの粘度と月玄武岩の弾性波速度の測定 (2017)
  • Author(s): 坂巻竜也
  • Organizer: 第13回月地殻研究会
  • Invited
• [Presentation] パイロープガラスの圧力起因の構造変化 (2017)
  • Author(s): 久野直毅、坂巻竜也、堀岡祥生、大橋智典、鈴木昭夫
  • Organizer: 第58回高圧討論会
• [Presentation] 川井型プレスを用いたX線イメージング吸収法による固体鉄の密度測定 (2017)
  • Author(s): 寺﨑英紀、下山裕太、西田圭佑、坂巻竜也、柴﨑裕樹、肥後祐司
  • Organizer: 第58回高圧討論会
• [Presentation] Sound velocity of iron-light element compounds and the chemical structure of the inner core (2016)
  • Author(s): Ohtani, E., Sakamaki, T., Fukui, H., Tanaka, R., Shibazaki, Y., Kamada, S., Sakairi, T., Takahashi, S., Tsutsui, S., Baron, A.Q.R.
  • Organizer: AGU Fall Meeting 2016
  • Place of Presentation: San Francisco USA
  • Year and Date: 2016-12-12
  • Int'l Joint Research
• [Presentation] Sound velocity and density of FeO at high pressure and temperature (2016)
  • Author(s): Tanaka, R., Sakamaki, T., Fukui, H., Ohtani, E., Kamada, S., Sato, S., Tsutsui, S., Uchiyama, H., Baron, A.Q.R., Suzuki, A.
  • Organizer: AGU Fall Meeting 2016
  • Place of Presentation: San Francisco USA
  • Year and Date: 2016-12-12
  • Int'l Joint Research
• [Presentation] 高圧下におけるFeOの音速測定 (2016)
  • Author(s): 田中遼介，坂巻竜也，福井宏之，大谷栄治，鎌田誠司，筒井智嗣，内山裕士，アルフレッド・バロン, 鈴木昭夫
  • Organizer: 第57回高圧討論会
  • Place of Presentation: つくば
  • Year and Date: 2016-10-26
• [Presentation] 地球惑星深部環境におけるマグマの物性と構造に関する研究 (2016)
  • Author(s): 坂巻竜也
  • Organizer: 日本鉱物科学会2016年年会
  • Place of Presentation: 金沢
  • Year and Date: 2016-09-23
  • Invited
• [Presentation] 高温高圧下での鉄-ニッケル合金の音速・密度測定 (2016)
  • Author(s): 坂巻竜也、福井宏之、大谷栄治、鎌田誠司、筒井智嗣、アルフレッド・バロン
  • Organizer: 日本鉱物科学会2016年年会
  • Place of Presentation: 金沢
  • Year and Date: 2016-09-23
• [Presentation] Pressure-induced change of iron in complicated silicate glasses (2016)
  • Author(s): Maeda, F., Kamada, S., Ohtani, E., Sakamaki, T., Hirao, N., Mitsui, T., Masuda, R., Nakano, S.
  • Organizer: The 54th European High Pressure Research Group (EHPRG) International Meeting on High Pressure Science and Technology
  • Place of Presentation: Bayreuth GERMANY
  • Year and Date: 2016-09-04
  • Int'l Joint Research
• [Presentation] X線非弾性散乱を用いた地球核条件下での鉄・鉄合金の音速測定 (2016)
  • Author(s): 坂巻竜也
  • Organizer: 地球惑星科学研究会・高圧物質科学研究会合同研究会
  • Place of Presentation: 大阪
  • Year and Date: 2016-08-28
  • Invited
• [Presentation] Synchrotron 57Fe Mössbauer study of basaltic glass up to the lowermost mantle pressure (2016)
  • Author(s): Maeda, F., Kamada, S., Ohtani, E., Sakamaki, T., Hirao, N., Mitsui, T., Masuda, R.
  • Organizer: Intenational Workshop: New Challenges in Volatile Cycling in the Deep Earth
  • Place of Presentation: Sendai JAPAN
  • Year and Date: 2016-07-04
  • Int'l Joint Research
• [Presentation] The compressibility of partial molar volume of H2O in magma (2016)
  • Author(s): T. Sakamaki
  • Organizer: Goldschmidt 2016
  • Place of Presentation: Yokohama JAPAN
  • Year and Date: 2016-06-26
  • Int'l Joint Research / Invited
• [Presentation] Reaction of MgCO3 high-pressure phase and SiO2; Origin of super-deep diamond (2016)
  • Author(s): F. Maeda, S. Kamada, E. Ohtani, T. Sakamaki, N. Hirao, Y. Ohishi
  • Organizer: Goldschmidt 2016
  • Place of Presentation: Yokohama JAPAN
  • Year and Date: 2016-06-26
  • Int'l Joint Research
• [Presentation] Melting relation in the Fe-S-Si system at 10 GPa: Implications for Mercury’s core (2016)
  • Author(s): H. Tobe, A. Suzuki, Y. Shibazaki, T. Sakamaki, E. Ohtani
  • Organizer: Goldschmidt 2016
  • Place of Presentation: Yokohama JAPAN
  • Year and Date: 2016-06-26
  • Int'l Joint Research
• [Presentation] Sound velocity of Fe3C and carbon in the core (2016)
  • Author(s): Takahashi, S., Ohtani, E., Sakamaki, T., Kamada, S., Fukui, H., Baron, A.Q.R.
  • Organizer: Goldshmidt2016
  • Place of Presentation: Yokohama JAPAN
  • Year and Date: 2016-06-26
  • Int'l Joint Research
• [Presentation] Sound velocity Fe3S at high pressure and high temperature based on inelastic X-ray scattering (2016)
  • Author(s): Kamada, S., Sakairi, T., Sakamaki, T., Ohtani, E., Terasaki, H., Fukui, H., Baron, A.Q.R., Suzuki, A., Uchiyama, H., Tsutsui, S.
  • Organizer: Japan Geoscience Union Meeting 2016
  • Place of Presentation: Chiba JAPAN
  • Year and Date: 2016-05-22
  • Int'l Joint Research