气候变化领域集成服务门户(CCPortal): Shock Melting Curve of Iron: A Consensus on the Temperature at the Earth's Inner Core Boundary

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DOI	10.1029/2020GL087758
	Shock Melting Curve of Iron: A Consensus on the Temperature at the Earth's Inner Core Boundary
	Li J.; Wu Q.; Li J.; Xue T.; Tan Y.; Zhou X.; Zhang Y.; Xiong Z.; Gao Z.; Sekine T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	The Earth's core consists of iron as the major component. The melting point of iron at the inner core boundary constrains the thermal structure and solidification of the Earth's core. However, the current estimation of the melting temperature of iron under the core conditions has significant variations. Here, we measured the temperatures of iron shocked up to ~256 GPa using precise pyrometer and velocimeter diagnostics via a two-stage light-gas gun. Our results indicated that the melting temperatures of iron at the core-mantle and inner core boundaries are 4300(250) and 5950(400) K, respectively. These temperatures are significantly lower than some previous shock experiments but are overall consistent with the recent results determined by fast X-ray diffraction techniques, X-ray absorption experiments in laser-heated diamond anvil cells, and by ab initio computations. Our iron melting curve indicates a relatively small Clapeyron slope and supports thermal models for a young inner core. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Melting point; X ray absorption; Ab initio computations; Current estimation; Earth's inner cores; Inner core boundary; Laser-heated diamond anvil cells; Thermal structure; Two-stage light gas gun; X-ray diffraction techniques; Iron; core-mantle boundary; inner core; iron; melting; numerical model; solidification; temperature; thermal structure
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/169962
作者单位	National Key Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, China; Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, China; Center for High Pressure Science and Technology Advanced Research, Shanghai, China; Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, Mianyang, China
推荐引用方式 GB/T 7714	Li J.,Wu Q.,Li J.,et al. Shock Melting Curve of Iron: A Consensus on the Temperature at the Earth's Inner Core Boundary[J],2020,47(15).
APA	Li J..,Wu Q..,Li J..,Xue T..,Tan Y..,...&Sekine T..(2020).Shock Melting Curve of Iron: A Consensus on the Temperature at the Earth's Inner Core Boundary.Geophysical Research Letters,47(15).
MLA	Li J.,et al."Shock Melting Curve of Iron: A Consensus on the Temperature at the Earth's Inner Core Boundary".Geophysical Research Letters 47.15(2020).