Experimental partitioning of uranium between liquid iron sulfide and liquid silicate: Implications for radioactivity in the Earth's core

Kevin T. Wheeler; David Walker; Yingwei Fei; William G. Minarik; William F. McDonough

doi:10.1016/j.gca.2005.11.023

Experimental partitioning of uranium between liquid iron sulfide and liquid silicate: Implications for radioactivity in the Earth's core

Kevin T. Wheeler, David Walker, Yingwei Fei, William G. Minarik, William F. McDonough

研究成果: Article › 査読

43 被引用数 (Scopus)

抄録

Measurable uranium (U) is found in metal sulfide liquids in equilibrium with molten silicate at conditions appropriate for a planetary magma ocean: 1-10 GPa, 1750-2100 °C, 0-28 wt% S, and fO₂ 2 log units below IW. However, the transfer of U from metal sulfide to silicate under our experimental conditions is so complete that insufficient U would remain so as to be of any importance to the core's heat budget. U content in the sulfide phase increases strongly with S content but shows no significant variability with either pressure or temperature. Maximum D_U^{sulfide/silicate} is 0.001 while most values are considerably lower.

本文言語	English
ページ（範囲）	1537-1547
ページ数	11
ジャーナル	Geochimica et Cosmochimica Acta
巻	70
号	6
DOI	https://doi.org/10.1016/j.gca.2005.11.023
出版ステータス	Published - 2006 3月 15
外部発表	はい

ASJC Scopus subject areas

地球化学および岩石学

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10.1016/j.gca.2005.11.023

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abstract = "Measurable uranium (U) is found in metal sulfide liquids in equilibrium with molten silicate at conditions appropriate for a planetary magma ocean: 1-10 GPa, 1750-2100 °C, 0-28 wt% S, and fO2 2 log units below IW. However, the transfer of U from metal sulfide to silicate under our experimental conditions is so complete that insufficient U would remain so as to be of any importance to the core's heat budget. U content in the sulfide phase increases strongly with S content but shows no significant variability with either pressure or temperature. Maximum DUsulfide/silicate is 0.001 while most values are considerably lower.",

author = "Wheeler, {Kevin T.} and David Walker and Yingwei Fei and Minarik, {William G.} and McDonough, {William F.}",

note = "Funding Information: This research was supported by the National Science Foundation and a NASA Cosmochemistry grant. We thank E. Takahashi for providing natural KLB-1 and Nancy Chabot, Jie Li, Rick Ryerson, and Julien Siebert for their insightful and helpful reviews. We also thank Elizabeth Cottrell for technical assistance and Richard Ash for guidance on the LA-ICP-MS at the University of Maryland. LDEO contribution 6866.",

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AU - Minarik, William G.

AU - McDonough, William F.

N1 - Funding Information: This research was supported by the National Science Foundation and a NASA Cosmochemistry grant. We thank E. Takahashi for providing natural KLB-1 and Nancy Chabot, Jie Li, Rick Ryerson, and Julien Siebert for their insightful and helpful reviews. We also thank Elizabeth Cottrell for technical assistance and Richard Ash for guidance on the LA-ICP-MS at the University of Maryland. LDEO contribution 6866.

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