Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL089616 |
Chemical reaction between metallic iron and a limited water supply under pressure: implications for water behavior at the core‐mantle boundary | |
M. Nishi; Y. Kuwayama; T. Hatakeyama; S. Kawaguchi; N. Hirao; Y. Ohishi; T. Irifune | |
2020-09-21 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Water transportation to the deep lower mantle via plate subduction may induce a reaction between water and iron at the core‐mantle boundary. Recent experimental studies suggest that such a reaction may generate FeO2Hx‐rich domains, which can explain the seismic structures of the ultralow velocity zone in this region. In this study, the chemical reaction between metallic iron and a limited water supply at ~120 GPa was investigated using time‐resolved in‐situ synchrotron X‐ray diffraction measurements in combination with the laser‐heated diamond anvil cell technique. Contrary to the results of earlier studies, the formation of FeO instead of FeO2Hx without intermediate phases was observed. Considering the unlimited availability of iron in the core and the limited water supply resulting from mantle downflow, the FeO‐rich layers consisted of Fe‐bearing ferropericlase and post‐perovskite, which must have locally cumulated at the bottom of the mantle simultaneously with hydrogen incorporation into the core. |
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/296381 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | M. Nishi,Y. Kuwayama,T. Hatakeyama,等. Chemical reaction between metallic iron and a limited water supply under pressure: implications for water behavior at the core‐mantle boundary[J]. Geophysical Research Letters,2020. |
APA | M. Nishi.,Y. Kuwayama.,T. Hatakeyama.,S. Kawaguchi.,N. Hirao.,...&T. Irifune.(2020).Chemical reaction between metallic iron and a limited water supply under pressure: implications for water behavior at the core‐mantle boundary.Geophysical Research Letters. |
MLA | M. Nishi,et al."Chemical reaction between metallic iron and a limited water supply under pressure: implications for water behavior at the core‐mantle boundary".Geophysical Research Letters (2020). |
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