Melting in the Fe-FeO system to 204 GPa: Implications for oxygen in Earth's core
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- Kenta Oka
- Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
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- Kei Hirose
- Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
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- Shoh Tagawa
- Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
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- Yuto Kidokoro
- Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
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- Yoichi Nakajima
- Department of Physics, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, Kumamoto 860-8555, Japan
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- Yasuhiro Kuwayama
- Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
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- Guillaume Morard
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, 75005 Paris, France
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- Nicolas Coudurier
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, 75005 Paris, France
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- Guillaume Fiquet
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, 75005 Paris, France
書誌事項
- 公開日
- 2019-11-01
- 資源種別
- journal article
- DOI
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- 10.2138/am-2019-7081
- 公開者
- Mineralogical Society of America
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説明
<jats:title>Abstract</jats:title><jats:p>We performed melting experiments on Fe-O alloys up to 204 GPa and 3500 K in a diamond-anvil cell (DAC) and determined the liquidus phase relations in the Fe-FeO system based on textural and chemical characterizations of recovered samples. Liquid-liquid immiscibility was observed up to 29 GPa. Oxygen concentration in eutectic liquid increased from >8 wt% O at 44 GPa to 13 wt% at 204 GPa and is extrapolated to be about 15 wt% at the inner core boundary (ICB) conditions. These results support O-rich liquid core, although oxygen cannot be a single core light element. We estimated the range of possible liquid core compositions in Fe-O-Si-C-S and found that the upper bounds for silicon and carbon concentrations are constrained by the crystallization of dense inner core at the ICB.</jats:p>
収録刊行物
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- American Mineralogist
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American Mineralogist 104 (11), 1603-1607, 2019-11-01
Mineralogical Society of America
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詳細情報 詳細情報について
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- CRID
- 1362820493049942272
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- ISSN
- 19453027
- 0003004X
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- 資料種別
- journal article
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- データソース種別
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- KAKEN
- OpenAIRE
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