高速２次元測温法から探る核マントル物質の融解現象

• Project Area: Interaction and Coevolution of the Core and Mantle: Toward Integrated Deep Earth Science
• Project/Area Number: 18H04366
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Research Institution: Meiji University (2019); The University of Tokyo (2018)
• Principal Investigator: 新名 良介 明治大学, 理工学部, 専任准教授 (00769812)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000); Fiscal Year 2019: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
• Keywords: 地球内部 / マントル / 地球核 / 高温高圧実験 / ダイヤモンドアンビルセル / 融解 / 鉄 / 地球・惑星内部構造 / 地殻・マントル物質 / 固体地球物理学 / 高温高圧

Outline of Annual Research Achievements

新しい温度決定システムを構築し、主にダイヤモンドアンビルセルを用いた核マントル物質の融解現象を理解するための実験的研究を推進した。核やマントルにおける融解現象は、地球内部物質進化を支配する最も重要な現象である。本年度に発表できた成果として、マントル物質の融点を決定する研究を推進し、酸化還元状態がマントルの融解現象を大きく左右する可能性が実験的に示された。この結果から、地球内部への酸素の輸送が、深さ660 kmにおける酸素誘起融解によって妨げられることが新たに示された。これは、近年観測されている地球深部における酸化還元状態異常が物質循環にも大きな影響を与えることを示唆している。また、地球核物質の融解相関係を実験的に研究することで、現在の核に含まれる軽元素の制約に取り組んだ。従来の実験よりもはるかに高い圧力において一連の実験を成功させることができた。得られた結果から、水素を含んだ鉄は純鉄よりも低い融点をもつことや、水素が固溶することで炭素固溶量を制限することが新たに分かり、地球核における水素の重要性が明らかになった。また、マントル鉱物の高圧力下における結晶構造、相関係や物性に関する実験的な研究も推進した。ドイツシンクロトロン放射光施設において行った高温高圧下その場分析を行うための技術開発に関連する成果も本年度発表できた。本年度の研究成果としては、査読あり国際学術誌に6本（印刷中含む）の論文が公開された。学会においても５回の発表を行った。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

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。

Research Products

• [Journal Article] A portable on-axis laser heating system for near-90? X-ray spectroscopy: Application to ferropericlase and iron silicide (2020)
  • Author(s): Spiekermann G., Kupenko I., Petitgirard S., Harder M., Nyrow A., Weis C., Albers C., Biedermann N., Libon L., Sahle C., Cerantola V., Glazyrin K., Sinmyo R., Kon?pkov? Z., Morgenroth W., Sergueev I., Yava? H., Dubrovinsky L., Tolan M., Sternemann C., Wilke M.
  • Journal Title: J. Synchrotron Radiat. Volume: 27 Issue: 2 Pages: 414-424
  • DOI: 10.1107/s1600577519017041
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Discovery of new-structured post-spinel MgFe2O4: Crystal structure and high-pressure phase relations (2020)
  • Author(s): Ishii T., Miyajima N., Sinmyo R., Boffa Ballaran T., Kojitani H., Mori D., Inaguma Y., Akaogi M.
  • Journal Title: Geophys. Res. Lett. Volume: 47 Issue: 6
  • DOI: 10.1029/2020gl087490
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hydrogen limits carbon in liquid iron (2019)
  • Author(s): Hirose Kei、Tagawa Shoh、Kuwayama Yasuhiro、Sinmyo Ryosuke 、Morard Guillaume 、Ohishi Yasuo 、Genda Hidenori
  • Journal Title: Geophysical Research Letters Volume: 46 Issue: 10 Pages: 5190-5197
  • DOI: 10.1029/2019gl082591
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of spin transition of iron on the thermal conductivity of (Fe, Al)-bearing bridgmanite (2019)
  • Author(s): Okuda Yoshiyuki、Ohta Kenji、Sinmyo Ryosuke、Hirose Kei、Yagi Takashi、Ohishi Yasuo
  • Journal Title: Earth and Planetary Science Letters Volume: 520 Pages: 188-198
  • DOI: 10.1016/j.epsl.2019.05.042
  • Peer Reviewed
• [Journal Article] The stability of Fe5O6 and Fe4O5 at high pressure and temperature (2019)
  • Author(s): Hikosaka Koutaro、Sinmyo Ryosuke、Hirose Kei、Ishii Takayuki、Ohishi Yasuo
  • Journal Title: American Mineralogist Volume: 104 Issue: 9 Pages: 1356-1359
  • DOI: 10.2138/am-2019-7097
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of Fe3+ on the phase relations under lower mantle: implications for redox melting in the stagnant slabs. (2019)
  • Author(s): Sinmyo R., Nakajima Y., McCammon CA., Miyajima N., Petitgirard S., Myhill R., Dubrovinsky L., Frost DJ.
  • Journal Title: J. Geophys. Res. Volume: 124 Issue: 12 Pages: 12484-12497
  • DOI: 10.1029/2019jb017704
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Phase transition boundary between fcc and hcp structures in Fe-Si alloy and its implications for terrestrial planetary cores (2019)
  • Author(s): Komabayashi Tetsuya、Pesce Giacomo、Morard Guillaume、Antonangeli Daniele、Sinmyo Ryosuke、Mezouar Mohamed
  • Journal Title: American Mineralogist Volume: 104 Issue: 1 Pages: 94-99
  • DOI: 10.2138/am-2019-6636
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Melting curve of iron to 290 GPa determined in a resistance-heated diamond-anvil cell (2019)
  • Author(s): Sinmyo Ryosuke、Hirose Kei、Ohishi Yasuo
  • Journal Title: Earth and Planetary Science Letters Volume: 510 Pages: 45-52
  • DOI: 10.1016/j.epsl.2019.01.006
  • Peer Reviewed
• [Journal Article] Phase relations in the system Fe-Ni-Si to 200 GPa and 3900 K and implications for Earth's core (2019)
  • Author(s): Komabayashi Tetsuya、Pesce Giacomo、Sinmyo Ryosuke、Kawazoe Takaaki、Breton Helene、Shimoyama Yuta、Glazyrin Konstantin、Konopkova Zuzana、Mezouar Mohamed
  • Journal Title: Earth and Planetary Science Letters Volume: 512 Pages: 83-88
  • DOI: 10.1016/j.epsl.2019.01.056
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Melting Curve and Equation of State of β‐Fe7N3: Nitrogen in the Core? (2019)
  • Author(s): Kusakabe Mayu、Hirose Kei、Sinmyo Ryosuke、Kuwayama Yasuhiro、Ohishi Yasuo、Helffrich George
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: 124 Issue: 4 Pages: 3448-3457
  • DOI: 10.1029/2018jb015823
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Melting experiments on the Fe?C binary system up to 255 GPa: Constraints on the carbon content in the Earth's core (2019)
  • Author(s): Mashino Izumi、Miozzi Francesca、Hirose Kei、Morard Guillaume、Sinmyo Ryosuke
  • Journal Title: Earth and Planetary Science Letters Volume: 515 Pages: 135-144
  • DOI: 10.1016/j.epsl.2019.03.020
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Melting experiments on liquidus phase relations in the Fe-S-O ternary system under core pressures (2019)
  • Author(s): Shunpei Yokoo、Hirose Kei、Sinmyo Ryosuke
  • Journal Title: Geophysical Research Letters Volume: 印刷中
  • NAID: 120006889028
  • Peer Reviewed
• [Journal Article] 内部抵抗加熱式ダイヤモンドアンビルセルを用いた鉄融点の決定 (2019)
  • Author(s): 新名良介、廣瀬敬、大石泰生
  • Journal Title: 高圧力の科学と技術 Volume: 印刷中
  • NAID: 130007680178
  • Peer Reviewed
• [Journal Article] 高温高圧実験を用いたマントル深部鉱物の物理・化学的性質の研究 (2019)
  • Author(s): 新名良介
  • Journal Title: 岩石鉱物科学 Volume: 48 Pages: 36-45
  • NAID: 130007626273
• [Journal Article] Experimental Determination of Eutectic Liquid Compositions in the MgO-SiO2 System to the Lowermost Mantle Pressures (2018)
  • Author(s): Ozawa Keisuke、Anzai Miyuki、Hirose Kei、Sinmyo Ryosuke、Tateno Shigehiko
  • Journal Title: Geophysical Research Letters Volume: 45 Issue: 18 Pages: 9552-9558
  • DOI: 10.1029/2018gl079313
  • Peer Reviewed
• [Presentation] 高温高圧下におけるFe5O6 とFe4O5 の安定性 (2019)
  • Author(s): 彦坂晃太郎, 新名良介, 廣瀬敬, 石井貴之, 大石泰生
  • Organizer: 日本鉱物科学会
• [Presentation] Hydrogen Limits Carbon in Liquid Iron (2019)
  • Author(s): Kei Hirose, Shoh Tagawa, Yasuhiro Kuwayama, Ryosuke Sinmyo and Guillaume Morard
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Transfer of SiO2 from the core to the mantle and its fate in the Earth in early and present times (2019)
  • Author(s): George R Helffrich, Maxim Ballmer, Guillaume Morard, Koichiro Umemoto, Ryuichi Nomura, Ryosuke Sinmyo, Anat Shahar, Stephane Labrosse, John W Hernlund and Kei Hirose
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Core-Mantle Interaction Through Liquid Magnesium Silicate Release from the Earth's Core (2019)
  • Author(s): Helffrich G, Hirose K, Nomura R & Sinmyo R
  • Organizer: Goldschmidt 2019
  • Int'l Joint Research
• [Presentation] Phase relations in the system Fe-Ni-Si to 200 GPa and 3900 K and implications for Earth’s core (2019)
  • Author(s): Tetsuya Komabayashi, Giacomo Pesce, Ryosuke Sinmyo, Takaaki Kawazoe, Helene Breton, Yuta Shimoyama, Glazyrin Konstantin, Zuzana Kon?pkov?, and Mohamed Mezouar
  • Organizer: EGU2019
  • Int'l Joint Research
• [Presentation] Technical development toward understanding the melting temperature of the materials at high pressure using ultra-fast spectroradiometry (2019)
  • Author(s): Ryosuke Sinmyo
  • Organizer: Interaction and Coevolution of the Core and Mantle International Symposium Annual General Meeting
  • Int'l Joint Research
• [Presentation] Crystallization of Liquid Fe-S-O at ICB Conditions (2018)
  • Author(s): Shunpei Yokoo, Kei Hirose and Ryosuke Sinmyo
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Stability of Fe5O6 at High Pressure and Temperature (2018)
  • Author(s): Koutaro Hikosaka, Ryosuke Sinmyo, Kei Hirose, Takayuki Ishii and Yasuo Ohishi
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Melting experiments on the Fe-C binary system up to 255 GPa: Constraints on the carbon content in the Earth’s core (2018)
  • Author(s): Izumi Mashino, Francesca Miozzi, Kei Hirose, Guillaume Morard and Ryosuke Sinmyo
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Internally resistive heated diamond anvil cell experiments on Fe-Ni-Si alloy to 200 GPa and 3900 K and its implications for Earth's core (2018)
  • Author(s): Tetsuya Komabayashi, Giacomo Pesce, Ryosuke Sinmyo, Takaaki Kawazoe, Helene Breton, Yuta Shimoyama, Konstantin Glazyrin, Zuzana Konopkova and Mohamed Mezouar
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Experimental Determination of Eutectic Liquid Compositions in the MgO-SiO2 System to the Lowermost Mantle Pressures (2018)
  • Author(s): Keisuke Ozawa, Miyuki Anzai, Kei Hirose, Ryosuke Sinmyo and Shigehiko Tateno
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Melting curve of iron to 290 GPa determined in a resistance-heated diamond-anvil cell: implications for the Earth and planetary core (2018)
  • Author(s): Ryosuke Sinmyo, Kei Hirose and Yasuo Ohishi
  • Organizer: AGU Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] 内部抵抗加熱式ダイヤモンドアンビルセルを用いた290GPaまでの鉄の融点決定 (2018)
  • Author(s): 新名良介、廣瀬敬、大石泰生
  • Organizer: SPring-8シンポジウム2018サテライト研究会
  • Invited
• [Presentation] 高温高圧実験から探る地球核とマントル最下部の温度構造 (2018)
  • Author(s): 新名良介、廣瀬敬、大石泰生
  • Organizer: 日本地球化学会年会
  • Invited
• [Presentation] 高温高圧実験を用いたマントル深部鉱物の物理・化学的性質の研究 (2018)
  • Author(s): 新名良介
  • Organizer: 日本鉱物科学会2018年会
  • Invited