气候变化领域集成服务门户(CCPortal): Chemical Reaction Between Metallic Iron and a Limited Water Supply Under Pressure: Implications for Water Behavior at the Core-Mantle Boundary

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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
	Nishi M.; Kuwayama Y.; Hatakeyama T.; Kawaguchi S.; Hirao N.; Ohishi Y.; Irifune T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
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 postperovskite, which must have locally cumulated at the bottom of the mantle simultaneously with hydrogen incorporation into the core. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Chemical reactions; Experimental mineralogy; Hydrochemistry; Iron; Iron metallography; Iron oxides; Core-mantle boundary; Hydrogen incorporation; In-situ synchrotrons; Intermediate phasis; Laser-heated diamond anvil cells; Limited water supplies; Ultralow velocity zone; Water transportation; Water supply; chemical reaction; core-mantle boundary; detection method; diamond anvil cell; lower mantle; subduction
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169663
作者单位	Geodynamics Research Center, Ehime University, Matsuyama, Japan; Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan; Department of Earth and Planetary Science, School of Science, The University of Tokyo, Tokyo, Japan; Japan Synchrotron Radiation Research Institute, Hyogo, Japan
推荐引用方式 GB/T 7714	Nishi M.,Kuwayama Y.,Hatakeyama T.,et al. Chemical Reaction Between Metallic Iron and a Limited Water Supply Under Pressure: Implications for Water Behavior at the Core-Mantle Boundary[J],2020,47(19).
APA	Nishi M..,Kuwayama Y..,Hatakeyama T..,Kawaguchi S..,Hirao N..,...&Irifune T..(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,47(19).
MLA	Nishi M.,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 47.19(2020).