上地幔低速高导层成因的探讨-水和熔体的作用
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摘要
上地幔中广泛存在低速高导层,对这些低速高导层成因的研究可以帮助我们了解上地幔物质的组成、分布以及地幔动力学过程.目前,地球科学家把上地幔低速高导层的主要成因归结为水或熔体的作用.本文主要介绍了水和熔体在上地幔中的赋存状况、对地震波速的衰减作用以及对电导率的影响.最后本文评述了含水模型和含熔体模型,并对电导率研究进行了展望.
The knowledge of the low-velocity and high-conductivity zones in the upper mantle can help us to understand the composition and distribution of the earth's material and the geodynamics of the upper mantle.Generally,people suggest that it is attributed the LVZ and HCZ to water and /or melt.In this paper,we have introduced the mode of occurrence of the water and melt in the upper mantle,and it's effect on the seismic wave velocity and electrical conductivity.Finally,we also point out the prospects of the research in the future.
引文
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