Electrical conductivity of melts: implications for conductivity anomalies in the Earth's mantle
Electrical conductivity of melts: implications for conductivity anomalies in the Earth’s mantle作者机构：Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang ProvinceSchool of Earth Sciences Zhejiang University CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space Sciences University of Science and Technology of China Institute for Planetary MaterialsOkayama University
出 版 物：《National Science Review》 (国家科学评论(英文版))
年 卷 期：2021年第8卷第11期
页 面：133-151页
核心收录：
学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 0703[理学-化学]
基 金：supported by the National Key R&D Program of China (2018YFA0702700) the National Natural Science Foundation of China (51988101, 41973056 and 41773056) the Fundamental Research Funds for the Central Universities(K20210168)
主 题：electrical conductivity silicate melt carbonate melt high-conductivity anomaly Earth's mantle
摘 要：Magmatic liquids,including silicate and carbonate melts,are principal agents of mass and heat transfer in the Earth and terrestrial planets,and they play a crucial role in various geodynamic processes and in Earth’s *** conductivity data of these melts elucidate the cause of electrical anomalies in Earth’s interior and shed light on the melt *** the improvement in high-pressure experimental techniques and theoretical simulations,major progress has been made on this front in the past several *** review aims to summarize recent advances in experimental and theoretical studies on the electrical conductivity of silicate and carbonate melts of different compositions and volatile contents under high temperature and *** electrical conductivity of silicate melts depends strongly on temperature,pressure,water content and the ratio of non-bridging oxygens to tetrahedral cations(NBO/T).By contrast,the electrical conductivity of carbonate melts exhibits a weak dependence on temperature and pressure due to their fully depolymerized *** electrical conductivity of carbonate melts is higher than that of silicate melts by at least two orders of *** can increase electrical conductivity significantly and reduce the activation energy of silicate ***,this effect is weak for carbonate *** addition,the replacement of alkali-earth elements(Ca2+or Mg2+) with alkali elements causes a significant decrease in the electrical conductivity of carbonate melts.A distinct compensation trend is revealed for the electrical conductivity of silicate and carbonate melts under anhydrous and hydrous *** important applications of laboratory-based melt conductivity are introduced in order to understand the origin of high-conductivity anomalies in the Earth’s *** for future studies are also provided.
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