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

Study on the primordial state of the terrestrial planets from the abundance of transition metal elements

Research Project

Project/Area Number 05833010
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 惑星科学
Research InstitutionGakushuin University

Principal Investigator

SUZUKI Toshihiro  Gakushuin University, Faculty of Science, Assistant, 理学部, 助手 (40235974)

Co-Investigator(Kenkyū-buntansha) AKAOGI Masaki  Gakushuin University, Faculty of Science, Professor, 理学部, 教授 (30126560)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsMantle-Core Separation / High Pressure / Element Partitioning
Research Abstract

The partitioning behavior of Mn, Co and Ni between metallic iron and olivine, pyroxene and magnesiowustite were experimentally investigated at 1400゚C and 3-11 GPa.The effect of dissolution of hydrogen in metallic iron on the partitioning behavior was also examined. At normal pressure, it is known that Co and Ni concentrate in metallic phase and Mn concentrates in oxide phases. These siderophile and lithophile nature of these elements reduce under high pressures : all the observed metal/silicate partition coefficients, are approaching to 1 with an increase in pressure. It is also found that the effect of dissolution of hydrogen in metallic iron is very small. Since the exchange reaction with Fe can not be defined on the trivalent elements, the pressure effect on the partition behavior of these elements were not determined precisely. However, it was suggested that partition coefficient of Cr, V,In, La, Tm and Sc may be also approaching to 1 with increase in pressure.
It has been pointed out that the abundance of elements in the Earth's upper mantle can not be explained by metal/silicate equilibrium consideration estimated from the partition coefficients at normal pressure. From the present experimental results, however, it is found that partition coefficients approach to 1 with increase in pressure, and the observed upper mantle elemental abundance may be explained by the equilibrium between metal/silicates under extremely high pressure. When we compare the geochemical characters of Earth, Moon, Shergottite parent body and Eucrite parent body, it is found that the apparent partition coefficients of these terrestrial planes systematically changed with change in size of the planet. These observations suggest that pressure effect on partition coefficients playd an important role for the chemical evolution of the terrestrial planets.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] Toshihiro Suzuki,Masaki Akaogi,Takehiko Yagi: "Pressure effect on Mn,Co and Ni Partitioning between iron hydride and mantle minerals" Proceedings of the Japan Academy. Vol.70,Ser.B. 31-36 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 鈴木敏弘: "高圧下における金属-鉱物の反応と核の組成" 高圧力の科学と技術. Vol.3. 34-40 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Suzuki T., Akaogi M.and Yagi T.: "Pressure effect on Mn, Co and Ni partitioning between iron hydride and mantle minerals." Proc.Japan Acad.70, Ser B. 31-36 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Suzuki T.: "Metal-mineral reaction under high pressure and its implications for composition of the core." Rev.High Press.Sci.Tech.3. 34-40

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshihiro Suzuki,Masaki Akaogi,Takehiko Yagi: "Pressure effect on Mn,Co,and Ni partitioning between iron hydride and Mantle minerals" Proceedings of the Japan Academy. Vol.70,Ser.B. 31-36 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 鈴木敏弘: "高圧下における金属-鉱物の反応と核の組成" 高圧力の科学と技術. Vol.3. 34-40 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Toshihiro Suzuki Masaki Akaogi Takehiko Yagi: "Pressure effect on Mn,Co and Ni Partitioning between iron hydride and mantle minerals" Proceedings of the Japan Academy. (in press). (1994)

    • Related Report
      1993 Annual Research Report

URL: 

Published: 1993-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi