上地幔矿物和岩石电导率的实验研究

发布时间：2018-03-27 09:36

本文选题：橄榄石　切入点：电导率　出处：《中国科学:地球科学》2017年05期

【摘要】：高温高压电导率实验研究是透视地球内部结构与物质组成的一个重要窗口.百年来进行了大量地幔矿物电导率的研究,但对地幔岩石的研究却不足;进行了压力对地幔矿物电导率影响的研究,但获得的激活体积值却有正有负;进行了含水橄榄石电导率的测量,但仍存在干湿软流圈地幔之争;进行了部分熔融岩石电导率的研究,但对异常高导成因的解释却仍没有定论.因为该研究对人们认识地幔的物质组成和矿物相变,地幔的电性结构和热结构,以及洋壳俯冲和高导异常成因等地幔动力学问题有重大意义,因此,还需继续研究地幔岩石、矿物的电导率与温度、压力、氧逸度和组分等之间的关系,再结合地球物理的探测结果,构建合理的电导率-深度剖面图.
[Abstract]:Experimental study of high temperature and high pressure conductivity is an important perspective window inside the earth structure and material composition. One hundred years has done much research on the electrical conductivity of mantle minerals, but the study of mantle rocks is inadequate; studied the influence of pressure on the electrical conductivity of mantle minerals, but the activation volume has both positive and negative values are; the measurement of water conductivity of olivine, but there are still wet asthenospheric mantle dispute; studied part of molten rock conductivity, but to explain the causes of abnormal high conductivity is still inconclusive. Because the study of material composition and mineral phase change people's understanding of the mantle, the electrical structure and thermal structure of the mantle, there is the significance, problems and the subduction of oceanic crust and high conductivity anomaly and mantle dynamics therefore also need to continue to study the mantle rocks, conductivity and temperature, the mineral pressure between the oxygen fugacity and composition The relationship and the results of geophysical exploration are combined to build a reasonable conductivity depth profile.

【作者单位】：中国科学院地质与地球物理研究所中国科学院地球与行星物理重点实验室;
【基金】：国家自然科学基金项目(批准号:41174074和41574089)资助
【分类号】：P542.5

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