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DOI | 10.1029/2021GL092681 |
Liquidus Phase Relations and Solid-Liquid Partitioning in the Fe-Si-C System Under Core Pressures | |
Masahiro Hasegawa; Kei Hirose; Kenta Oka; Yasuo Ohishi | |
2021-06-16 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Both silicon and carbon have been proposed to be important light elements in the Earth's core, in particular in the inner core. Here we performed melting experiments on the Fe-Si-C ternary system at ∼50, ∼136, and ∼200 GPa and determined the liquidus phase relations and the solid/liquid partition coefficients (D) of C and Si. The liquidus field of Fe shrinks at higher pressures, which narrows down the possible outer core liquid composition. Our data also demonstrate that the Fe-Si binary eutectic liquid reduces its Si concentration to ∼8 wt% with increasing pressure to 330 GPa. We found that the inner core is not Fe-Si-C-S alloy but likely includes hydrogen when considering the low DC and the strong enhancement of DSi with increasing liquid C abundance. The present-day core does not include as much as ∼6 wt% Si, suggesting that at least a part of “missing” Si could be sequestrated elsewhere. |
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/330760 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Masahiro Hasegawa,Kei Hirose,Kenta Oka,et al. Liquidus Phase Relations and Solid-Liquid Partitioning in the Fe-Si-C System Under Core Pressures[J]. Geophysical Research Letters,2021. |
APA | Masahiro Hasegawa,Kei Hirose,Kenta Oka,&Yasuo Ohishi.(2021).Liquidus Phase Relations and Solid-Liquid Partitioning in the Fe-Si-C System Under Core Pressures.Geophysical Research Letters. |
MLA | Masahiro Hasegawa,et al."Liquidus Phase Relations and Solid-Liquid Partitioning in the Fe-Si-C System Under Core Pressures".Geophysical Research Letters (2021). |
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