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DOI | 10.1029/2020GL089218 |
Thermodynamical Modeling of Liquid Fe‐Si‐Mg‐O:Molten Magnesium Silicate Release from the Core | |
George Helffrich; Kei Hirose; Ryuichi Nomura | |
2020-10-07 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | We developed a thermodynamic model to explore the joint solubility of Mg, Si, and O in liquid Fe on the basis of high‐pressure metal‐silicate partitioning data in the literature, with more Mg kept in the metal when Si and O are present. With <1.7±0.5 wt% Mg, the metal in the young Earth's core retains Mg as the core evolves and crystallizes SiO2. Higher Mg concentrations require either the late addition of metal that equilibrated with silicate in a super‐liquidus magma ocean, or the assimilation of silicate into the core at the time of a giant impact. Above 1.7 wt% Mg, (Mg,Fe)‐silicate melts also exsolve from the core and transfer core‐hosted elements to the mantle. Fractional crystallization of the core‐derived silicate melts in the core or at the core‐mantle boundary could, additionally, yield a persistent molten silicate layer that could also contribute to ultra‐low velocity zone formation in the lowermost mantle. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/297933 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | George Helffrich,Kei Hirose,Ryuichi Nomura. Thermodynamical Modeling of Liquid Fe‐Si‐Mg‐O:Molten Magnesium Silicate Release from the Core[J]. Geophysical Research Letters,2020. |
APA | George Helffrich,Kei Hirose,&Ryuichi Nomura.(2020).Thermodynamical Modeling of Liquid Fe‐Si‐Mg‐O:Molten Magnesium Silicate Release from the Core.Geophysical Research Letters. |
MLA | George Helffrich,et al."Thermodynamical Modeling of Liquid Fe‐Si‐Mg‐O:Molten Magnesium Silicate Release from the Core".Geophysical Research Letters (2020). |
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