Determination of the Density of the Earth’s Core Based on the Equations of State of Iron and Titanium at High Pressures and Temperatures

IF 1 4区物理与天体物理 Q4 PHYSICS, APPLIED

High Temperature Pub Date : 2024-03-22 DOI:10.1134/s0018151x23060044

A. B. Medvedev

引用次数: 0

Abstract

Using previously developed equations of state for iron and titanium, the density of the Earth’s core was calculated at a mass content of titanium in a mixture with iron of ~20%. This concentration is taken from data for high-titanium (HT) basalts, the formation of which in large igneous provinces is hypothetically associated with the ascent of thermal plumes in the mantle from the core to the surface. The calculated density on pressure dependences in the outer liquid and inner solid cores satisfactorily agree with the data of the preliminary reference Earth model (PREM).

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根据铁和钛在高压和高温下的状态方程测定地核密度

摘要利用以前开发的铁和钛的状态方程，计算了在钛与铁的混合物中的质量含量约为 20% 时的地核密度。该浓度取自高钛（HT）玄武岩的数据，大型火成岩带中高钛玄武岩的形成假定与地幔中的热羽流从地核上升到地表有关。计算得出的液态外核和固态内核密度与压力的关系与初步参考地球模型（PREM）的数据完全吻合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Temperature 物理-物理：应用

CiteScore

1.50

自引率

40.00%

发文量

审稿时长

4-8 weeks

期刊介绍： High Temperature is an international peer reviewed journal that publishes original papers and reviews written by theoretical and experimental researchers. The journal deals with properties and processes in low-temperature plasma; thermophysical properties of substances including pure materials, mixtures and alloys; the properties in the vicinity of the critical point, equations of state; phase equilibrium; heat and mass transfer phenomena, in particular, by forced and free convections; processes of boiling and condensation, radiation, and complex heat transfer; experimental methods and apparatuses; high-temperature facilities for power engineering applications, etc. The journal reflects the current trends in thermophysical research. It presents the results of present-day experimental and theoretical studies in the processes of complex heat transfer, thermal, gas dynamic processes, and processes of heat and mass transfer, as well as the latest advances in the theoretical description of the properties of high-temperature media.