摘要
人们对上地幔标志性矿物橄榄石的认识 ,基本上是经历一个从直流到交流 ,又从交流到阻抗谱的认识过程 .本文主要通过对橄榄石电导率的影响因素出发 ,包括温度、压力、铁镁比值、氧逸度等因素的影响和制约 .用目前国际高温高压学术界公认的阻抗谱技术探讨了橄榄石在高压下的相变 ,并在此基础上 ,进一步研究地球物理学家非常关心的热点问题—冷地幔的实验室的模拟 ,并作了充分的论证 .
It is widely accepted opinion that we have known the signal mineral in the upper mantle, on the whole, coming from direct current to alternating current, and from alternating current to impedance spectroscopy. In this paper, we mainly discuss the electrical conductivity influential factors in the upper-mantle olivine conductivity, including to temperature, pressure, magnesium and iron ratio, oxygen fugacity, and so on. By virtue of the impedance spectroscopy means, high-pressure phrase transition of olivine is discussed. On the basis of this research, another hot point problem-cooling mantle simulation is well demonstrated.
出处
《地球物理学进展》
CSCD
2003年第2期256-260,共5页
Progress in Geophysics
基金
中国科学院知识创新工程重要方向项目 (KZCX3- SW -12 4)资助 .
关键词
橄榄石
电导率
相变
高温高压
镁铁比值
氧逸度
冷地幔
olivine, electrical conductivity, phase transition, high temperature, high pressure, magnesium iron ratio, xygen fugacity, cooling mantle
