Expectation from Geochemistry to High-Pressure and High-Temperature Experiments to Elucidate Earth's Geochemical Evolution

• SUZUKI Katsuhiko

  Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology

• TAKAMASA Asako

  Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology

• TOKESHI Satoshi

  Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology

Bibliographic Information

Other Title

• 地球の化学的進化と高温高圧実験への期待
• チキュウ ノ カガクテキ シンカ ト コウオン コウアツ ジッケン エ ノ キタイ

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. ¹⁸²W (decay product of extinct ¹⁸²Hf) 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

Keywords

• geochemical evolution
• core segregation
• partition coefficient
• siderophile element
• tungsten isotope
• osmium isotope
• high-pressure experiment
• late veneer

Details

• CRID: 1390282679358344448
• NII Article ID: 130006338334
• NII Book ID: AN10452913
• DOI: 10.4131/jshpreview.27.246
• ISSN: 13481940
• ISSN: 0917639X
• NDL BIB ID: 028849613
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028849613
• Web Site: https://www.jstage.jst.go.jp/article/jshpreview/27/4/27_246/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed