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Experimental study on the melting relation of silicate under the lowermost mantle condition

Research Project

Project/Area Number 16340164
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionOsaka University (2006)
Tohoku University (2004-2005)

Principal Investigator

KONDO Tadashi  Osaka University, Graduate School of Science, Professor, 大学院理学研究科, 教授 (20252223)

Co-Investigator(Kenkyū-buntansha) OHTANI Eiji  Tohoku Univ., Graduate School of Science, Professor, 大学院理学研究科, 教授 (60136306)
SUZUKI Akio  Tohoku Univ., Graduate School of Science, Assistant Professor, 大学院理学研究科, 助手 (20281975)
TERASAKI Hidenori  Tohoku Univ., Graduate School of Science, Assistant Professor, 大学院理学研究科, 助手 (50374898)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥16,500,000 (Direct Cost: ¥16,500,000)
Fiscal Year 2006: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2005: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2004: ¥9,200,000 (Direct Cost: ¥9,200,000)
Keywordsdiamond anvil cell / laser heating / core-mantle reaction synchrotron / synchrotron / core / 地球・惑星内部構造 / 惑星起源・進化 / 固体地球物理学 / 岩石・鉱物・鉱床学 / 地殻・マントル物質 / 溶融実験 / 下部マントル / CMB / 放射光実験
Research Abstract

In this research project, we investigated the phase relation of the minerals under the lowermost mantle condition and the chemical reaction between those minerals and molten iron up to the condition corresponding to the earth's core-mantle boundary. For realizing such extreme conditions, we newly designed a symmetrical diamond anvil cell with a wide conical window for laser-heating and optical spectroscopy. The laser-heating system was also refined for stable heating and optimal temperature measurement from the hot sample by a spectroradiometric method. Experiments were performed using these techniques at SPring-8 and Photon Factory for in-situ X-ray diffraction measurements at high P-T, and also at laboratory for recovery runs to check the quenched samples. Thanks for the recent advances in micro-processing technologies such as laser cutting, focused ion beam, we successfully prepared the thin section of the recovered samples for analytical transmission electron microscopy. Finally we … More obtained the following results. (1) The chemical reaction between molten iron and perovskite and post-perovskite phase and wetting property at the core-mantle boundary condition was examined, and silicon and oxygen turned to be important candidates as light elements in the outer core. The wetting angle between post-perovskite phase and molten iron was slightly higher than the critical angle of 60°, which means 2wt% of the core material can be trapped in the D" layer. (2) Magnesiowustite is the heaviest minerals overall the mantle based on the iron partitioning experiments between magnesium oxide and silicate perovskite and post-perovskite phase. No evidence for the effect of a high-spin to low-spin transition was found in these minerals. (3) Potassium can be dissolved into molten iron significantly at core-mantle boundary condition, and the element may work as a heat source in the core. (4) The hydrous mineral, delta-AIOOH, has a wide stability field over 100GPa and 2000K, therefore this phase at relatively low temperature condition in descending slab possibly survive to the lowermost mantle to supply the water to core-mantle boundary. (5) Potassium bearing silicate with post-hollandite structure can be stably exist at the lowermost mantle condition. Less

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (35 results)

All 2006 2005 2004

All Journal Article (35 results)

  • [Journal Article] Interaction between iron and post-perovskite at core-mantle boundary and core signature in plume source region2006

    • Author(s)
      Sakai, T. et al.
    • Journal Title

      Geophys. Res. Lett. 33

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Partitioning of potassium between iron and silicate at the core-mantle boundary2006

    • Author(s)
      Hirao, N. et al.
    • Journal Title

      Geophys. Res. Lett. 33

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Interaction between iron and post-perovskite at core-mantle boundary and core signature in plume source region2006

    • Author(s)
      Sakai, T., Kondo, T., Ohtani, E., Terasaki, H., Endo, N., Kuba, T., Suzuki, T., Kikegawa, T.
    • Journal Title

      Geophys.Res.Lett. 33, L15317, doi:10.1029/2006 GL026868

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Partitioning of potassium between iron and silicate at the core-mantle boundary2006

    • Author(s)
      Hirao, N., Ohtani, E., Kondo, T., Endo, N., Kuba, T., Suzuki, T., Kikegawa, T.
    • Journal Title

      Geophys.Res.Lett. 33, L08303, doi:10.1029/2005 GL05324

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Interaction between iron and post-perovskite at core-mantle boundary and core signature in plume source region2006

    • Author(s)
      Sakai, T., Kondo, T., Ohtani, E., et al.
    • Journal Title

      Geophys. Res. Lett 33

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Partitioning of potassium between iron and silicate at the core-mantle boundary2006

    • Author(s)
      Hirao, N., Ohtani, E., Kondo, T., et al.
    • Journal Title

      Geophys. Res. Lett 33

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Partitioning of potassium between iron and silicate at the core-mantle boundary2006

    • Author(s)
      Hirao, N., Ohtani, E., Kondo, T.et al.
    • Journal Title

      Geophys.Res.Lett. (in press)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Fe-Mg partitioning between (Mg,Fe)SiO_3 post-perovskite, perovskite, and magnesiowstite in the Earth's lower mantle2005

    • Author(s)
      Kobayashi, Y. et al.
    • Journal Title

      Geophys. Res. Lett. 32

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] レーザー加熱ダイヤモンドアンビルセルにおける温度制御2005

    • Author(s)
      近藤忠
    • Journal Title

      高圧力の科学と技術 15・1

      Pages: 22-28

    • NAID

      10014500951

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Iron-water reaction at high pressure and temperature, and hydrogen transport into the core2005

    • Author(s)
      Ohtani, E. et al.
    • Journal Title

      Phys. Chem. Minerals 78・2

      Pages: 77-82

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Formation of metastable cubic-perobskite in high-pressure phase transformation of Ca(Mg, Fe, Al)Si_2O_62005

    • Author(s)
      Asahara, Y. et al.
    • Journal Title

      American Mineralogist 90

      Pages: 457-462

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Fe-Mg partitioning between (Mg, Fe)SiO_3 post-perovskite, perovskite, and magnesiowstite in the Earth's lower mantle2005

    • Author(s)
      Kobayashi, Y., Kondo, T., Ohtani E., Hirao, N., Miyajima, N., Yagi, T., Nagase, N., Kikegawa, T.
    • Journal Title

      Geophys.Res.Lett. 32, L19301, doi:10.1029/2005 GL023257

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Temperature control for Laser-Heated Diamond Anvil Cell (in Japanese)2005

    • Author(s)
      Kondo, T.
    • Journal Title

      The Review of High Pressure Science and Technology Vol.15, 1

      Pages: 22-28

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Formation of metastable cubic-perovskite in high pressure phase transformation of Ca(Mg, Fe, Al)Si_20_62005

    • Author(s)
      Asahara, Y., Ohtani, E., Kondo, T., Kubo, T., Miyajima, N., Nagase, T., Fujino, K., Yagi, T., Kikegawa, T.
    • Journal Title

      Am.Mineral. 90

      Pages: 457-462

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Iron-water reaction at high pressure and temperature, and hydrogen transport into the core2005

    • Author(s)
      Ohtani, E., Hirao, N., Kondo, T., Ito, M., Kikegawa, T.
    • Journal Title

      Phys.Chem.Mineral. 78, 2

      Pages: 77-82

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Iron-water reaction at high pressure and temperature, and hydrogen transport into the core2005

    • Author(s)
      Ohtani, E., Hirao, N., Kondo, T.et al.
    • Journal Title

      Phys.Chem.Minerals 78・2

      Pages: 77-82

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Formation of metastable cubic-perobskite in high-pressure phase transformation of Ca(Mg,Fe,Al)Si_2O_62005

    • Author(s)
      Asahara, Y., Ohtani, E., Kondo, T., et al.
    • Journal Title

      American Mineralogist 90

      Pages: 457-462

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Fe-Mg partitioning between (Mg, Fe) SiO3 post-perovskite, perovskite, and magnsiowustite in the Earth's lower mantle2005

    • Author(s)
      Kobayashi, Y., Kondo, T., Ohtani, E., et al.
    • Journal Title

      Geophys.Res.Lett. 32

    • Related Report
      2005 Annual Research Report
  • [Journal Article] レーザー加熱ダイヤモンドアンビルセルにおける温度制御2005

    • Author(s)
      近藤 忠
    • Journal Title

      高圧力の科学と技術 15

      Pages: 22-28

    • NAID

      10014500951

    • Related Report
      2005 Annual Research Report
  • [Journal Article] レーザー加熱ダイヤモンドアンビルセルにおける温度制御2005

    • Author(s)
      近藤 忠
    • Journal Title

      高圧力の科学と技術 15・1

      Pages: 22-28

    • NAID

      10014500951

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Iron-water reaction at high pressure and temperature, and hydrogen transoort into the core2005

    • Author(s)
      Ohtani, E., Hirao, N., Kondo, T et al
    • Journal Title

      Phys.Chem.Minerals. (In press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Phase transitions of (Mg,Fe)O at megabar pressures2004

    • Author(s)
      Kondo, T. et al.
    • Journal Title

      Phys. Earth Planet. Inter. 143-144

      Pages: 201-213

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Compression of iron hydride to 80 GPa and hydrogen in the Earth's inner core2004

    • Author(s)
      Hirao, N. et al.
    • Journal Title

      Phys. Chem. Minerals 31

      Pages: 329-336

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Equation of state of iron-silicon alloys to megabar pressure2004

    • Author(s)
      Hirao, N. et al.
    • Journal Title

      Geophys. Res. Lett. 32

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] レーザー加熱ダイヤモンドアンビルセルにおける温度制御2004

    • Author(s)
      Asahara, Y. et al.
    • Journal Title

      Phys. Earth Planet. Inter. 143-144

      Pages: 421-432

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Water transport into the deep mantle and formation of a hydrous transition zone2004

    • Author(s)
      Ohtani, E. et al.
    • Journal Title

      Phys. Earth Planet. Inter. 78・2

      Pages: 255-269

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Phase transitions of (Mg, Fe)O at megabar pressures2004

    • Author(s)
      Kondo, T., Ohtani, E., Hirao, N., Yagi, T., Kikegawa, T.
    • Journal Title

      Phys.Earth Planet.Inter. 143-144

      Pages: 201-213

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Compression of iron hydride to 80 GPa and hydrogen in the Earth's inner core2004

    • Author(s)
      Hirao, N., Kondo, T., Ohtani, E., Takemura, K., Kikegawa, T.
    • Journal Title

      Geophys.Res.Lett. 31, L066169,doi:10.1029/2003 GL019380

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Equation of state of iron-silicon alloys to megabar pressure2004

    • Author(s)
      Hirao, N., Ohtani, E., Kondo, T., Kikegawa, T.
    • Journal Title

      Phys. Chem. Minerals 31

      Pages: 329-336

    • NAID

      130007039985

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Phase relations o a carbonaceous chondrite at lower mantle conditions2004

    • Author(s)
      Asahara, Y., Kubo, T., Kondo, T.
    • Journal Title

      Phys.Earth Planet.Inter. 143-144

      Pages: 421-432

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Water transport into the deep mantle and formation of a hydrous transition zone2004

    • Author(s)
      Ohtani, E., Litasov, K., Hosoya, T., Kubo, T., Kondo, T.
    • Journal Title

      Phys.Earth Planet.Inter. 143-44

      Pages: 255-269

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Phase transitions of (Mg, Fe)O at megabar pressures2004

    • Author(s)
      Kondo, T., Ohtani, E., Hirao, N., et al.
    • Journal Title

      Phys.Earth Planet.Inter. 143-144

      Pages: 201-213

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Compression of iron hydride to 8OGPa and hydrogen in the Earth's inner core2004

    • Author(s)
      Hirao, N., Kondo, T., Ohtani, E et al
    • Journal Title

      Geophys.Res.Lett. 31

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Equation of state of iron-silicon alloys to megabar pressure2004

    • Author(s)
      Hirao, N., Ohtani, E., Kondo, T., Kikegawa, T.
    • Journal Title

      Phys.Chem.Minerals 31

      Pages: 329-336

    • NAID

      130007039985

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Phase relations of a carbonaceous chondrite at lower mantle conditions2004

    • Author(s)
      Asahara, Y., Kubo, T., Kondo, T.
    • Journal Title

      Phys.Earth Planet.Inter. 143-144

      Pages: 421-432

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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