大陆中、下地壳电学特征实验研究  

ELECTRICAL PROPERTY EXPERIMENTAL STUDIES ON THE MID AND LOWER CONTINENTAL CRUST

作　　者：朱茂旭[1] 谢鸿森[1] 

机构地区：[1]中国科学院贵阳地球化学研究所,贵阳550002

出　　处：《地质科技情报》1999年第4期97-102,共6页Geological Science and Technology Information

基　　金：国家自然科学基金!(49672099)

摘　　要：高温高压下地壳物质电导率的实验室测定是研究大陆中、下地壳高导层成因的重要方法之一。研究表明,水、石墨、部分熔融以及矿物脱水都可能形成地壳高导层,在不同构造环境和深度下这些机制起着不同的作用。为解释中地壳高导层,水的存在是必不可少的条件,在下地壳,水、石墨、部分熔融以及矿物脱水。Experimental measurement of electrical conductivity of the Earth's materials is important to our understanding of the genesis of highly conductive layers(HCL)in the mid and lower continental crust At present,some experimental results show that saline water,graphite,partial melting and dehydration of some minerals,may be responsible for the formation of HCL,and that one or more mechanisms may be combined to contribute to the formation of HCL in various tectonic backgrounds and at different depths Existence of brine is necessary to explain HCL in the mid continental crust regardless of rock types.In the lower continental crust,all mechanisms mentioned above,even specific dry lower continental rocks,can interpret field MT measurements

关 键 词：大陆 电导率 高导层 高温高压 地壳 地学 

分 类 号：P631.34[天文地球—地质矿产勘探] P313.3[天文地球—地质学]