地球の化学的進化と高温高圧実験への期待  [in Japanese] Expectation from Geochemistry to High-Pressure and High-Temperature Experiments to Elucidate Earth's Geochemical Evolution  [in Japanese]

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Author(s)

    • 鈴木 勝彦 SUZUKI Katsuhiko
    • 国立研究開発法人海洋研究開発機構 海底資源研究開発センター Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology
    • 賞雅 朝子 TAKAMASA Asako
    • 国立研究開発法人海洋研究開発機構 海底資源研究開発センター Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology
    • 渡慶次 聡 TOKESHI Satoshi
    • 国立研究開発法人海洋研究開発機構 海底資源研究開発センター Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology

Abstract

Geochemical tools such as the chemical and isotopic compositions of the samples with a wide range of ages have revealed the chemical evolution of the Earth. A model of the very early history of the earth with accumulation of the planetesimal, the giant impact, core segregation and late veneer has been proposed based on siderophile element abundance and isotopic composition of the old mantle-derived rocks. Especially, late veneer following core segregation hypothesis is supported by evidence that gradual increase with time in platinum group elements abundance of komatiite originated from deep mantle and the chondritic Os isotopic evolution of the earth's mantle. <sup>182</sup>W (decay product of extinct <sup>182</sup>Hf) anomaly relative to present-day mantle value of komatiite and modern ocean island basalt has indicated core-mantle interaction. These models have been proposed based on geochemical studies, but they still have many unclear problems. In line of this, it is very important to precisely constrain the behaviors and partition coefficients of the elements under deep-earth conditions. Here we mention these problems and propose importance of constraints by high-pressure and high-temperature experiments to provide data on behavior of elements, especially siderophile elements.<br>

Journal

  • The Review of High Pressure Science and Technology

    The Review of High Pressure Science and Technology 27(4), 246-255, 2017

    The Japan Society of High Pressure Science and Technology

Codes

  • NII Article ID (NAID)
    130006338334
  • NII NACSIS-CAT ID (NCID)
    AN10452913
  • Text Lang
    JPN
  • ISSN
    0917-639X
  • NDL Article ID
    028849613
  • NDL Call No.
    Z17-1589
  • Data Source
    NDL  J-STAGE 
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