Ferric iron and aluminum partitioning between MgSiO3- and CaSiO3-perovskites under oxidizing conditions
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- NISHIO-HAMANE Daisuke
- Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University
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- SETO Yusuke
- Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University
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- NAGAI Takaya
- Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University
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- FUJINO Kiyoshi
- Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University
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Ferric iron and aluminum partitioning between MgSiO3-dominant perovskite (Mg-Pv) and CaSiO3-dominant perovskite (Ca-Pv) was investigated at 27-100 GPa and 1600-2500 K under oxidizing conditions using a starting composition of 0.85CaMgSi2O6 + 0.15Fe3+AlO3 employing a combined laser-heated diamond anvil cell, synchrotron radiation, and analytical transmission electron microscopy. The product phases were Mg-Pv, Ca-Pv, and a small amount of stishovite at pressures below 30 GPa, while a two-phase assemblage of Mg-Pv and Ca-Pv was identified at pressures above 30 GPa. The appearance of stishovite below 30 GPa indicates the partial formation of an oxygen-deficient perovskite from 2ASiO3 + Fe3+AlO3 = 2AFe3+0.5Al0.5O2.5 (oxygen-deficient perovskite) + 2SiO2 (stishovite), where A = Mg or Ca. The composition of Mg-Pv and Ca-Pv show that ferric iron and aluminum were predominantly incorporated into Mg-Pv under oxidizing conditions, indicating that Mg-Pv is the dominant host phase for ferric iron and aluminum even under highly oxidizing lower mantle conditions.
収録刊行物
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- Journal of Mineralogical and Petrological Sciences
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Journal of Mineralogical and Petrological Sciences 102 (5), 291-297, 2007
一般社団法人 日本鉱物科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681523617920
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- NII論文ID
- 10019908432
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- NII書誌ID
- AA11460926
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- ISSN
- 13493825
- 13456296
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可