| 地球内部物质电学性质原位测量的影响因素和导电机制——以地壳矿物为例 |
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| 引用本文： | 蒋建军,代立东,李和平,单双明,胡海英,惠科石.地球内部物质电学性质原位测量的影响因素和导电机制——以地壳矿物为例[J].地球科学进展,2013,28(4):455-466. |
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| 作者姓名： | 蒋建军 代立东 李和平 单双明 胡海英 惠科石 |
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| 作者单位： | 1. 中国科学院地球化学研究所地球内部物质高温高压实验室,贵州 贵阳550002;中国科学院大学,北京 100049
2. 中国科学院地球化学研究所地球内部物质高温高压实验室,贵州 贵阳,550002 |
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| 基金项目： | 中国科学院地球化学研究所"135"项目，国家自然科学基金项目"高温高压下不同氧逸度、水含量、成分和电子自旋态转变的方镁铁矿电导率的实验研究" |
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| 摘 要： | 高温高压下矿物岩石电导率的实验研究数据,不仅是人们了解地球内部物质组成及其演化过程的重要窗口,而且可以为野外大地电磁测深和地磁测深反演提供重要约束.重点介绍了温度、压力、水含量、铁含量、氧逸度、熔融等矿物岩石电导率的影响因素,深入阐述了存在于矿物岩石的4种主要导电机制,即离子、质子、小极化子和大极化子.回顾近年来地壳主要造岩矿物(长石、石英和辉石)的电导率实验研究取得的新成果,讨论了它们的导电机制和地球物理意义,并对其目前存在的问题及尚需进一步展开的工作进行了探讨.
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| 关 键 词： | 矿物岩石 电导率 影响因素 导电机制 高温高压 |
Influential Factors and Conduction Mechanisms of the In-situ Electrical Conductivity Measurements of Earth's Interior Materials: A Case Study on Crustal Minerals |
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| Jiang Jianjun,Dai Lidong,Li Heping,Shan Shuangming,Hu Haiying,Hui Keshi.Influential Factors and Conduction Mechanisms of the In-situ Electrical Conductivity Measurements of Earth's Interior Materials: A Case Study on Crustal Minerals[J].Advance in Earth Sciences,2013,28(4):455-466. |
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| Authors: | Jiang Jianjun Dai Lidong Li Heping Shan Shuangming Hu Haiying Hui Keshi |
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| Institution: | 1.Laboratory for High Temperature and High Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;2.University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | In-situ experimental measurements of the electrical conductivities of minerals and rocks under high temperature and high pressure are the important approaches to explore the chemical composition and evolution process of materials in Earth’s interior, as well as to interpret the inversion results of the magnetotelluric and geomagnetic deep sounding data. In this paper, above all, some crucial influence factors on the electrical properties of mineral and rock such as temperature, pressure, water content, iron content, oxygen fugacity and melting are described in detail. Secondly, four typical kinds of electrical conduction mechanisms of minerals and rocks are demonstrated (e.g. ion, proton, small polaron and large polaron) at high temperature and high pressure. Finally, conduction mechanisms and geophysical applications are discussed based on the recent research results of electrical conductivities for feldspar, quartz and pyroxene on the major rock bearing minerals in the crust, and the present problems and future research work are discussed. |
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