Effects of Pressure and Ca2+ on the Fe-Mg Partitioning between Olivine and Clinopyroxene.

• KAWASAKI Tashisuke

  Division of Earth Sciences, Department of Biosphere and Geosphere Sciences, Faculty of Science, Ehime University

書誌事項

タイトル別名

• Effects of Pressure and Ca2 + on the Fe

抄録

The exchange reaction of Fe²⁺ and Mg²⁺ between olivine and clinopyroxene has been experimentally determined at 1150°C, and at pressures 1 and 1. 5 GPa in the Ca-poor and Ca-enriched systems, the bulk ratio Fe/ (Fe+Mg) which was fixed as about 0. 5. The CaO contents of olivine and clinopyroxene seriously affect on the Fe-Mg partition coefficient K_D [= (X^Cpx_Mg X^Ol_Fe) / (X^Cpx_Fe X^Ol_Mg) ], which increases with increasing X^Ol_Ca. The K_D was found as 1. 50 at 1 GPa for the assemblage of olivine (X^Ol_Ca = 0. 006) and subcalcic clinopyroxene (X^Cpx_Ca = 0. 2898) ; 2. 90 at 1. 5 GPa for the assemblage of diopside-hedenbergite clinopyroxene and olivine (X^Ol_Ca = 0. 1048), in contrast to 3. 00 at 1 GPa for the assemblage of diopside-hedenbergite clinopyroxene, olivine with X^Ol_Ca = 0. 1464 and ferroan monticellite. On the other hand, the distribution coefficient K_D was found to be insensitive to pressure comparing with the previous data. The olivine-ferroan monticellite solvus becomes narrow with increasing pressure, but this pressure effect on the solvus is very small.

収録刊行物

• 高圧力の科学と技術

  高圧力の科学と技術 7 95-97, 1998

  日本高圧力学会

キーワード

• olivine
• clinopyroxene
• ferroan monticellite
• Fe-Mg partitioning
• solution properties

詳細情報

• CRID: 1390001204381482496
• NII論文ID: 10002688918
• NII書誌ID: AN10452913
• DOI: 10.4131/jshpreview.7.95
• COI: 1:CAS:528:DyaK1cXktFymsbY%3D
• ISSN: 13481940
• ISSN: 0917639X
• ISSN: http://id.crossref.org/issn/0917639X
• NDL書誌ID: 4493845
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4493845
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可