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Generation of ultra high pressure by the diamond-anvil cell and estimation of temperature of the Earth's core

Research Project

Project/Area Number 11554016
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section展開研究
Research Field 固体地球物理学
Research InstitutionTOKYO INSTITUTE OF TECHNOLOGY

Principal Investigator

HIROSE Kei  Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Associate Professor, 大学院・理工学研究科, 助教授 (50270921)

Co-Investigator(Kenkyū-buntansha) KANO Tsutomu  Toshiba Tangaroi COOP, Researcher, 製造本部・生産技術担当, 主務(研究職)
TAKAHASHI Eiichi  Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Professor, 大学院・理工学研究科, 教授 (40144779)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥14,200,000 (Direct Cost: ¥14,200,000)
Fiscal Year 2000: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1999: ¥10,700,000 (Direct Cost: ¥10,700,000)
Keywordsdiamond-anvil cell / high-pressure apparatus / lower mantle / 超高圧
Research Abstract

We developped a new diamond-anvil cell by modification of that used by the group lead by Dr. Mao at the Geophysical Laboratory, US.The new cell has more stable piston, suitable for the very high temperature experiments up to 3000-K at high pressures. Using this diamond-anvil cell, we obtained the experimental results below ; High pressure melting experiments on the pyrolite composition were conducted. The results showed that its melting curve is similar to MORB, supporting that the temperature of outer core is over 4000-K.Subsolidus phase equilibria studies were also done on the pyrolite composition. We found more iron is partitioned into Mg-rich perovskite in the-lower mantle than the earlier estimates. It suggests that the Earth's lower mantle includes more Mg-perovskite. The phase transition in GeO2 was determined by the in-situ X-ray diffraction measurements at high pressure and high temperature.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] K.Hirose,Y.Fei,S.Ono,T.Yagi,K.Funakoshi,K.Hirose,Y.Fei,S.Ono,T.Yagi,K.Funakoshi: "In-situ measurements of the phase transition boundary in Mg3Al2Si3O12 : implications for the nature of the seismic discontinuities in the Earth's mantle"Earth and Planetary Sciences. 181. 567-573 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Hirose and Y.Fei: "Melting of subducted basalts and formation of anti-crust at the bottom of the mantle"G-cubed. (submitted). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Ono,K.Hirose,N.Nishiyama,M.Isshiki: "Phase boundary between rutile-type and CaCl2-type germanium dioxide determined by in situ X-ray observations"Geophysical Research Letters. (submitted). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Hirose, Y.Fei, S.Ono, T.Yagi, K.Funakoshi: "In-situ measurements of the phase transition boundary in Mg_3Al_2Si_3O_<12> : implications for the nature of the seismic discontinuities in the Earth's mantle."Earth and Planetary Sciences. 181. 567-573 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Hirose and Y.Fei: "Melting of subducted baslts and formation of anti-crust at the bottom of the mantle."G-cubed.. (to be submitted).. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Ono, K.Hirose, N.Nishiyama, M.Isshiki: "Phase boundary between rutile-type and CaCal2-type germanium dioxide determined by in situ X-ray observations."Geophysical Research Letters.. (ti be submitted). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Hirose,Y.Fei,S.Ono,T.Yagi,K.Funakoshi,K.Hirose,Y.Fei,S.Ono,T.Yagi,K.Funakoshi: "In-situ measurements of the phase transition boundary in Mg3Al2Si3O12 implications for the nature of the seismic discontinuities in the Earth's mantle"Earth and Planetary Sciences. 181. 567-573 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Hirose and Y.Fei: "Melting of subducted basalts and formation of anti-crust at the bottom of the mantle"G-cubed. (submitted). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Ono,K.Hirose,N.Nishiyama,M.Isshiki: "Phase boundary between rutile-type and CaCl2-type germanium dioxide determined by in situ X-ray observations"Geophysical Research Letters. (submitted). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Hirose,Y.Fei,S.Ono,T.Yagi,K.Funakoshi: "The role of majorite in dynamics at the 660-km discontinuity"Terra Nostra. 99/7. 38-40 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] J.Li,Y.Fei,K.Hirose,H.Mao: "High pressure experiments of Fe-S system constraints on the nature of the Earth's core"EOS. 80. F939 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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