• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

HIGH-PRESSURE EXPERIMENTAL STUDIES ON THE ORIGIN OF LAYERED STRUCTURE OF THE EARTH

Research Project

Project/Area Number 11440133
Research Category

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

Allocation TypeSingle-year Grants
Section一般
Research Field 固体地球物理学
Research InstitutionOKAYAMA UNIVERSITY

Principal Investigator

ITO Eiji  INSTITUTE FOR STUDY OF THE EARTHS INTERIOR, OKAYAMA UNIVERSITY, PROFESSOR, 固体地球研究センター, 教授 (00033259)

Co-Investigator(Kenkyū-buntansha) YONEDA Akira  INSTITUTE FOR STUDY OF THE EARTH7S INTERIOR, OKAYAMA UNIVERSITY, ASSOCIATE PROFESSOR, 固体地球研究センター, 助教授 (10262841)
WALTER J. Michael  INSTITUTE FOR STUDY OF THE EARTHS INTERIOR, OKAYAMA UNIVERSIRT, ASSOCIATE PROFESSOR, 固体地球研究センター, 助教授 (20284094)
KATSURA Tomoo  INSTITUTE FOR STUDY OF THE EARTHS INTERIOR, OKAYAMA UNIVERSITY, ASSOCIATE PROFESSOR, 固体地球研究センター, 助教授 (40260666)
NAKAMURA Eizo  INSTITUTE FOR STUDY OF THE EARTHS INTERIOR, OKAYAMA UNIVERSITY, PROFESSOR, 固体地球研究センター, 教授 (80201672)
KANZAKI Masami  INSTITUTE FOR STUDY OF THE EARTHS INTERIOR, OKAYAMA UNIVERSIRT, ASSOCIATE PROFESSOR, 固体地球研究センター, 助教授 (90234153)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥14,800,000 (Direct Cost: ¥14,800,000)
Fiscal Year 2000: ¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1999: ¥7,900,000 (Direct Cost: ¥7,900,000)
KeywordsSINTERED DIAMOND / SYNCHROTRON DADIATION / SnO2 HIGH-PRESSEUR PHASE / IRON / MELTING EXPERIMENT / LIQUIDUS PHASE / MAGMAOCEAN / CORE FORMATION / ペリドタイト / 下部マントル / 物質リザーバー / 燒結ダイアモンド / 放射光 / 溶融実験 / MORB / 沈み込むスラブ
Research Abstract

In situ X-ray study at high-pressure and high-temperature has been developed using the synchrotron radiation at SPring-8 and a multi-anvil apparatus (MA) equipped with sintered diamond (SD). Pressures to 49 GPa were generated over ca 4 mm^3. Using this systems stability and thermoelastic properties of the cubic SnO_2 (Pa3-) were determined up to 29 GPa and 1500 K.Exploration of 5th polymorph of iron "β-Fe" has been carried out. No evidence of β-Fesofar, but ε-phase is stable up to ca 40 GPa and 1700K.
Melting experiments on natural peridotite were carried out up to 35 GPa. It has been found that the first liquidus phase changes from magnesiowustite (Mw) to Mg-perovskite (Mg-Pv) at 31 GPa with increase of pressure. At pressures higher than 33 GPa (deeper than 1000 km in the mantle), Mg-Pv, Mw and Ca-Pv coexist with liquid at temperatures between solidus and liquidus. Mass balance regression analysis suggest that differentiation of 34% Mg-Pv and 3% Ca-Pv from the primitive mantle consistently form the peridotitic material. Fractionation of Mg-Pv and Ca-Pv would have formed an dense and hot region on the bottom of the mantle characterized as an enriched geochemical reservoir. Partioning of Ni and Co between molten iron, and silicate liquid, Mg-Pv and Mw were examined up to 29 GPa The experimental results suggest that core formation in a 1000km-depth magma ocean is consistent with the observed partitioning data of Ni and Co between the mantle and core.

Report

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

    (23 results)

All Other

All Publications (23 results)

  • [Publications] 伊藤英司: "焼結ダイアモンドと下部マントル科学"地学雑誌. 109. 859-867 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nakatsuka,A., et al.: "Symmetry change of majorite solid-solution in the system Mg_3Al_2Si_3O_<12>-MgSiO_3"Am.Mineral.. 84. 1135-1143 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ono,S., et al.: "Thermoelastic properties of the high-pressure phase of SnO2 determined by in situ X-ray observations up to 30GPa and 1400K"Phys,Chem.Minerals. 27. 618-622 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Walter,M.J.: "Screws tighten on the core. News and Reviews"Nature. 398. 563 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yoneda,A.: "The xyz algorithm specialized for eigenvibaration problem of bored an laminated objects"J.Sound and Vibration. 236. 431-441 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Xue,X., et al.: "An ab initio calculation of 17O and 29Si NMR parameters for SiO2 polymorphs"Solid State NMR. 16. 245-259 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ito, E.: "Sintered diamond and development of lower mantle science"J.Geograhpy. 109. 859-867 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nakatsuka, A., et al.: "Symmetry change of majorite solid-solution in the system Mg_3Al_2Si_3O_<12>-MgSiO_3"Am.Mineral.. 84. 1135-1143 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ono, S., et al.: "Thermoelastic properties of the high-pressure phase of SnO2 determined by in situ X-ray observations up to 30GPa and 1400K"Phys, Chem.Minerals. 27. 618-622 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Walter, M.J.: "Screws tighten on the core. News and Reviews"Nature. 398. 563 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yoneda, A.: "The xyz algorithm specialized for eigenvibaration problem of bored an laminated objects"J.Sound and Vibration. 236. 431-441 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Xue, X., et al.: "An ab initio calculation of 17O and 29Si NMR parameters for SiO2 polymorphs"Solid State NMR. 16. 245-259 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 伊藤英司: "焼結ダイアモンドと下部マントル科学"地学雑誌. 109. 859-867 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nakatsuka,A.,Yoshiasa,A.,Yamanaka,T.,Katsura,T.,Ito,E.: "Symmetry change of majorite solid-solution in the system Mg_3Al_2Si_3O_<12>-MgSiO_3"Am.Mineral.. 84. 1135-1143 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ono,S.,Ito,E.,Katsura,T.,Yoneda,A.,Walter,M.J.,Urakawa,S.,Utsumi,W.,Funakoshi,K.: "Thermoelastic properties of the high-pressure phase of SnO2 determined by in situ X-ray observations up to 30GPa and 1400K"Phys, Chem.Minerals. 27. 618-622 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Walter,M.J.: "Screws tighten on the core. News and Reviews"Nature. 398. 563 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yoneda,A.: "The xyz algorithm specialized for eigenvibaration problem of bored an laminated objects"J.Sound and Vibration. 236. 431-441 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Xue,X.,Kanzaki,M.: "An ab initio calculation of 17O and 29Si NMR parameters for SiO2 polymorphs"Solid State NMR. 16. 245-259 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M. Akaogi & E. Ito: "Calormetric study on majorite-perovskite transition in the system Mg_4Si_4O_<12>-Mg_3Al_2Si_3O_<12> : transition boundaries with positive pressure-temperature slopes"Phys. Earth Planet. Inter.. 114. 129-140 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] A. Nakatsuka, A. Yoshiasa, T. Yamanaka, T. Katura & E. Ito: "Symmetry change of majorite solid solution in the system Mg_3Al_2Si_3O_<12>-MgSiO_3"Am. Mineral.. 84. 1135-1143 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. J. Walter: "Screws tighten on the core"Nature. 398. 563 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] X. Xue & M. Kanzaki: "NMR characteristics of possible oxygen sites in aluminosilicate glasses and melts : an ab initio study"J. Phys. Chem B. 103. 10816-10830 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Yoshikawa & E. Nakamura: "Geochemical evolution of Horoman peridotite complex : Implications for melt extraction, metasomatism and compositional layering in the mantle"J. Gerphys. Res.. 105. 2879-2901 (2000)

    • Related Report
      1999 Annual Research Report

URL: 

Published: 1999-04-01   Modified: 2021-04-07  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi