地球和火星核心的热导率和演化

IF 1.9 3区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Kenji Ohta , Kei Hirose
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引用次数: 0

摘要

精确测定铁合金在高压和高温下的热导率对于理解地球和其他陆地天体金属核的热历史和动力学是必不可少的。金属的导热系数可以通过Wiedemann-Franz定律从其电阻率中得到,但可以直接测量。在这里,我们回顾了最近在金刚石砧池中对铁合金电阻率的测量,考虑了铁的电阻率、杂质电阻率和电阻率饱和效应,以及它们的导热系数(或扩散系数)的直接测量和计算。我们还讨论了地球和火星核的高导热性对它们的热和成分演化的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermal conductivity and evolution of the Earth's and Mars' cores
Precise determinations of the thermal conductivity of Fe alloys at high pressures and temperatures are essential for understanding the thermal history and dynamics of the metallic cores of the Earth and other terrestrial bodies. While it can be directly measured, the thermal conductivity of metal is obtained from its electrical resistivity via Wiedemann–Franz law. Here we review recent measurements of the electrical resistivity of Fe alloys in a diamond-anvil cell, considering the resistivity of Fe, impurity resistivity, and the resistivity saturation effect, as well as the direct measurements and calculations of their thermal conductivity (or diffusivity). We also discuss implications of the high thermal conductivity of the Earth's and Martian cores for their thermal and compositional evolutions.
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来源期刊
Physics of the Earth and Planetary Interiors
Physics of the Earth and Planetary Interiors 地学天文-地球化学与地球物理
CiteScore
5.00
自引率
4.30%
发文量
78
审稿时长
18.5 weeks
期刊介绍: Launched in 1968 to fill the need for an international journal in the field of planetary physics, geodesy and geophysics, Physics of the Earth and Planetary Interiors has now grown to become important reading matter for all geophysicists. It is the only journal to be entirely devoted to the physical and chemical processes of planetary interiors. Original research papers, review articles, short communications and book reviews are all published on a regular basis; and from time to time special issues of the journal are devoted to the publication of the proceedings of symposia and congresses which the editors feel will be of particular interest to the reader.
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