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Fe isotope fractionation by Seebeck effect at the core-mantle boundary

Research Project

Project/Area Number 21K18657
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 17:Earth and planetary science and related fields
Research InstitutionOkayama University

Principal Investigator

Yoshino Takashi  岡山大学, 惑星物質研究所, 教授 (30423338)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2021: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Keywords鉄同位体 / ゼーベック係数 / 酸化還元反応 / 核マントル境界 / 高圧実験 / 核ーマントル境界
Outline of Research at the Start

鉄は太陽系の非揮発性元素の中でも最も豊富な元素であるが、地球のマントルの鉄同位体比はコンドライトより重い理由は謎のままである。本研究では、核―マントル境界(CMB)の上部に位置するマントル最下部は地球内部最大の熱境界層であることから、ゼーベック効果によりその境界で酸化還元反応が起き、核とマントル間で鉄の同位体分別が起きるという仮説を提唱する。高圧実験によって、ブリッジマナイトのゼーベック係数を測定し、境界で起こる反応が酸化反応であるか還元反応であるかを特定し、酸化還元反応によって鉄の同位体分別が起きるかを調査する。核―マントル境界においてマントルの重い鉄同位体比が形成可能か制約する。

Outline of Final Research Achievements

Through this research project, many advances have been made in the development of thermoelectric measurements of mantle and nuclear materials under ultra-high pressure using a large-capacity multi-anvil press. It was confirmed that the redox reaction occurs in the electric field at the nuclear-mantle boundary expected by the Seebeck effect. The Seebeck coefficients of mantle minerals under high pressure have not been reported so far, but in this study, the Seebeck coefficients of olivine and wadsleyite, which are the most abundant minerals in the upper mantle minerals and the mantle transition zone, were successfully measured. These advances will lead to the determination of iron isotope fractionation by the Seebeck effect at the Earth's core-mantle boundary in the near future.

Academic Significance and Societal Importance of the Research Achievements

地球の核マントル境界で安定であると期待されるブリッジマナイトの直流電場における酸化還元反応の実験、ゼーベック係数の測定に至らなかったため、鉄同位体分別に関する見識を得ることはできなかったが、高温高圧下の熱電測定に向けた技術は直実に進展した。このことは多くの電極を小さい高圧セルに組み込む非常に難しい実験の超高圧下での実現に期待を持たせる。一方で地球内部での温度差に起因したゼーベック効果の研究は皆無であるが、その効果に一石を投じることができた。高圧下における熱電特性の研究の進展は、熱変換デバイスの評価、電極反応の研究の促進にも応用することで社会実装可能なデバイス開発にもつながることが期待される。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (26 results)

All 2023 2022 2021

All Journal Article (14 results) (of which Int'l Joint Research: 10 results,  Peer Reviewed: 14 results,  Open Access: 8 results) Presentation (12 results) (of which Int'l Joint Research: 9 results)

  • [Journal Article] Effect of iron content on thermal conductivity of ferropericlase: implications for planetary mantle dynamics.2023

    • Author(s)
      Y. Zhang, T. Yoshino, M. Osako
    • Journal Title

      Geophysical Research Letters

      Volume: 51 Issue: 7

    • DOI

      10.1029/2022gl101769

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Investigation of Solid?Solid Transition in Ti and Zr at High Pressure by Electrical Resistivity2023

    • Author(s)
      Ezenwa Innocent C.、Yoshino Takashi
    • Journal Title

      physica status solidi (b)

      Volume: 2023 Issue: 7 Pages: 2300079-2300079

    • DOI

      10.1002/pssb.202300079

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interaction of carbonates with peridotite containing iron metal: Implications for carbon speciation in the upper mantle2022

    • Author(s)
      Martirosyan N.S.、Shatskiy A.、Litasov K.D.、Sharygin I.S.、Yoshino T.
    • Journal Title

      Lithos

      Volume: 428-429 Pages: 106817-106817

    • DOI

      10.1016/j.lithos.2022.106817

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Editorial: Water in the Earth’s interior2022

    • Author(s)
      Fei Hongzhan、Zhang Baohua、Liu Jia、Yoshino Takashi
    • Journal Title

      Frontiers in Earth Science

      Volume: 10 Pages: 1-2

    • DOI

      10.3389/feart.2022.1030793

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Viscosity of bridgmanite determined by in situ stress and strain measurements in uniaxial deformation experiments2022

    • Author(s)
      Noriyoshi Tsujino, Daisuke Yamazaki, Yu Nishihara, Takashi Yoshino, Yuji Higo, Yoshinori Tange
    • Journal Title

      Science Advances

      Volume: 8 Issue: 13 Pages: 1821-1821

    • DOI

      10.1126/sciadv.abm1821

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Partial dehydration of brucite and its implications for water distribution in the subducting oceanic slab2022

    • Author(s)
      Xinzhuan Guo, Takashi Yoshino, Sibo Chen, Xiang Wu, Junfeng Zhang
    • Journal Title

      Geoscience Frontiers

      Volume: 13 Issue: 2 Pages: 101342-101342

    • DOI

      10.1016/j.gsf.2021.101342

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Oxidation Extent of the Upper Mantle by Subducted Slab and Possible Oxygen Budget in Deep Earth Inferred From Redox Kinetics of Olivine2022

    • Author(s)
      Chengcheng Zhao, Takashi Yoshino, Baohua Zhang
    • Journal Title

      Journal of Geophysical Research: Solid Earth

      Volume: 127 Issue: 2

    • DOI

      10.1029/2021jb022977

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Exploration of the best reference material on anelastic measurement by cyclic loading under high pressure2022

    • Author(s)
      Chao Liu, Takashi Yoshino, Daisuke Yamazaki, Noriyoshi Tsujino, Hitoshi Gomi, Moe Sakurai, Youyue Zhang, Ran Wang, Longli Guan, Kayan Lau, Yoshinori Tange, Yuji Higo
    • Journal Title

      High Pressure Research

      Volume: 42 Issue: 1 Pages: 14-28

    • DOI

      10.1080/08957959.2021.2013834

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Incorporation mechanism of Fe and Al into bridgmanite in a subducting mid-ocean ridge basalt and its crystal chemistry_2021

    • Author(s)
      Akihiko Nakatsuka, Hiroshi Fukui, Seiji Kamada, Naohisa Hirao, Makio Ohkawa, Kazumasa Sugiyama, Takashi Yoshino
    • Journal Title

      Scientific Reports

      Volume: 11 Pages: 13834-13834

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Thermal equation of state of F-bearing superhydrous phase B (Mg10Si3O14(OH,F)4): Implications for the transportation of fluorine and water into the lower mantle2021

    • Author(s)
      Xiang Li, Yungui Liu, Ran Wang, Takashi Yoshino, Jingui Xu, Dongzhou Zhang, Tobias Gr_tzner, Junfeng Zhang, Xiang Wu
    • Journal Title

      Physics of the Earth and Planetary Interiors

      Volume: 323 Pages: 106824-106824

    • DOI

      10.1016/j.pepi.2021.106824

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electrical Resistivity of Cu and Au at High Pressure above 5 GPa: Implications for the Constant Electrical Resistivity Theory along the Melting Curve of the Simple Metals2021

    • Author(s)
      IC Ezenwa, T. Yoshino
    • Journal Title

      Materials

      Volume: 14 Issue: 19 Pages: 5476-5476

    • DOI

      10.3390/ma14195476

    • NAID

      120007168217

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electrical conductivity of diaspore, δ-AlOOH and ε-FeOOH2021

    • Author(s)
      Ran Wang, Takashi Yoshino
    • Journal Title

      American Mineralogist

      Volume: 106 Issue: 5 Pages: 774-781

    • DOI

      10.2138/am-2021-7605

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Hydrogen diffusion mechanism in the mantle deduced from H-D interdiffusion in wadsleyite2021

    • Author(s)
      W. Sun, T. Yoshino, N. Sakamoto, H. Yurimoto
    • Journal Title

      Earth and Planetary Science Letters

      Volume: 561 Pages: 116815-116815

    • DOI

      10.1016/j.epsl.2021.116815

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electrical conductivity of melts: Implications for conductivity anomalies in the Earth's mantle2021

    • Author(s)
      Bao-Hua Zhang, Xuan Guo, Takashi Yoshino, Qun-Ke Xia
    • Journal Title

      National Science Review

      Volume: 8 Issue: 11

    • DOI

      10.1093/nsr/nwab064

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Electrical conductivity of hydrous silicate melt atop of the 410 km seismic discontinuity2022

    • Author(s)
      T. Yoshino, R. Wang
    • Organizer
      Goldschmidt Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Simultaneous measurements of thermal conductivity and thermal diffusivity of bridgmanite and post-spinel: implications for planetary mantle dynamics and evolution2022

    • Author(s)
      Y. Zhang, T. Yoshino, M. Osako
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Oxidizing magma ocean due to redox disproportionation of Fe2+ at high pressures and implications for the atmosphere Electrical conductivity of hydrous silicate melt atop of the 410 km seismic discontinuity (4/2022

    • Author(s)
      H. Kuwahara, R. Nakada, S. Kadoya, T. Yoshino, T. Irifune
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 410km不連続面直上の含水メルトの電気伝導度測定2022

    • Author(s)
      芳野 極, Wang Ran
    • Organizer
      第63回高圧討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Al,Na ドープ黒リンの高圧合成と物性評価_2021

    • Author(s)
      友村 和也, 野口 直樹, 藤井 優輝, 斉藤 隆宏, 芳野 極, 劉 超, 岡村 英一
    • Organizer
      第62回高圧討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 熱電効果による沈み込んだスラブの自己的酸化還元_2021

    • Author(s)
      芳野極, Wang Ran
    • Organizer
      第62回高圧討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] The effect of water on energy dispersion of olivine and its implications for the origin of the sharp contrast of seismic observation at the lithosphere-asthenosphere boundary_2021

    • Author(s)
      Chao Liu, Takashi Yoshino
    • Organizer
      Japan Geoscience Union Meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Simultaneous measurements of thermal conductivity and thermal diffusivity of bridgmanite and post-spinel: implications of mantle dynamics and evolution_2021

    • Author(s)
      張 友悦, 芳野 極, 大迫 正弘
    • Organizer
      Japan Geoscience Union Meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Self-redox of subducted slab by Seebeck effect_2021

    • Author(s)
      Takashi Yoshino, Ran Wang
    • Organizer
      Japan Geoscience Union Meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Redox kinetics of the subducted slabs indicated by Seebeck coefficient measurements_2021

    • Author(s)
      Ran Wang, Takashi Yoshino
    • Organizer
      Japan Geoscience Union Meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Wetting property of Fe-S melt in solid iron: Implication to core crystallization in planetesimals_2021

    • Author(s)
      弓取 大輔, 寺崎 英紀, 芳野 極, 浦川 啓
    • Organizer
      Japan Geoscience Union Meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Possibility of percolation of Fe-S melts in asteroidsPossibility of percolation of Fe-S melts in asteroids_2021

    • Author(s)
      三浦 巧, 寺崎 英紀, 近藤 忠, 大高 理, 芳野 極
    • Organizer
      Japan Geoscience Union Meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-07-13   Modified: 2024-01-30  

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