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DOI | 10.1029/2020GL088303 |
Strong sequestration of hydrogen into the Earth’s core during planetary differentiation | |
Liang Yuan; Gerd Steinle‐; Neumann | |
2020-07-08 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | We explore the partitioning behavior of hydrogen between coexisting metal and silicate melts at conditions of the magma ocean and the current core–mantle boundary with the help of density functional theory molecular dynamics. We perform simulations with the two‐phase and thermodynamic integration methods. We find that hydrogen is weakly siderophile at low pressure (20 GPa and 2500 K), and becomes much more strongly so with pressure, suggesting that hydrogen is transported to the core in a significant amount during core segregation and is stable there. Based on our results, the core likely contains ~1 wt% H, assuming single‐stage formation and equilibration at 40 GPa. Our two‐phase simulations further suggest that silicon is entrained in the core‐forming metal, while magnesium remains in the silicate phase. This preferred incorporation of silicon hints at an explanation for the elevated Mg/Si ratio of the bulk silicate Earth relative to chondritic compositions. |
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/283312 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Liang Yuan,Gerd Steinle‐,Neumann. Strong sequestration of hydrogen into the Earth’s core during planetary differentiation[J]. Geophysical Research Letters,2020. |
APA | Liang Yuan,Gerd Steinle‐,&Neumann.(2020).Strong sequestration of hydrogen into the Earth’s core during planetary differentiation.Geophysical Research Letters. |
MLA | Liang Yuan,et al."Strong sequestration of hydrogen into the Earth’s core during planetary differentiation".Geophysical Research Letters (2020). |
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