高温高压下辉石岩的电导率研究  

The Electrical Conductivity of Pyroxeniteat High Temperature and Pressure

作　　者：王多君[1] 李和平[1] 刘丛强[1] 易丽[1] 苏根利[1] 张卫刚[2] 许祖鸣[1] 

机构地区：[1]中国科学院地球化学研究所 [2]长庆石油勘探局石油天然气开发公司,陕西西安710021

出　　处：《高压物理学报》2004年第2期177-182,共6页Chinese Journal of High Pressure Physics

基　　金：中国科学院知识创新工程重要方向项目(KZCX2 SW 124)

摘　　要：利用阻抗谱在1.0～2.0GPa、温度450～792K条件下、105～12Hz的频率范围内,对辉石岩的电导率进行了研究,并且分析了测试频率对电导的影响,结果表明,电导率对频率具有一定的依赖性;在复平面上出现了代表颗粒内部的阻抗弧。辉石岩的激化焓为0.661～0.673eV,样品中较高的铁含量可能是造成本实验电导率较高的主要原因。The electric conductivity of pyroxenite has been measured at pressure of 1.0～2.0 GPa,temperature of 320～700 ℃,and frequency of 10~5 Hz to 12 Hz,and the conduction mechanism has been analyzed in terms of the impedance spectra.Experimental results indicated that the electric conductivity of pyroxenite depended on the frequency of alternative current.Impedance arcs representing the conduction mechanism of grain interiors are displayed in the complex impedance plane,and this mechanism is dominated at high pressure.The activation enthalpies for pyroxenite are 0.661～0.673 eV.Higher (iron) content may lead to the higher values of the electrical conductivity in the experiments.

关 键 词：高温高压 辉石岩 电导率 阻抗谱 地球物理 

分 类 号：P313[天文地球—固体地球物理学] O521.21[天文地球—地球物理学]