地震前后祁连山中段深部电性变化的跟踪研究  

Research on variance of electrical resistivity at middle Mt.Qilianbefore and after earthquakes

作　　者：聂永安[1] 崔晓峰[1] 冯德益[1] 张云琳[1] 

机构地区：[1]天津市地震局,海南省地震局

出　　处：《地震地磁观测与研究》1995年第3期15-20,共6页Seismological and Geomagnetic Observation and Research

基　　金：国家自然科学基金

摘　　要：利用在青藏高原北缘（祁连山中段）第一个长约４００ｋｍ的ＭＴ重复监测剖面上所获得的地震前后最新的地表视电阻率资料，用一维ＭＴ反演方法得到了剖面下方电性结构随时间的变化结果。着重分析了相当于大陆多震层深度范围内介质电阻享参数在地震前后的变化。结果表明，地下电阻串的变化呈现分区特征。By using the newest apparent resistivity data which are from the first MT repeated monitoring profile about 400 km long at the middle segment of Mt.Qilian,northern mar- gin of Qinghai-Tibet Plateau before and after earthquakes,the result of electricity varia- tion with time under the profile is obtained through 1-DMT inverse method in this pa- per. The variance of electrical resistivity before and after earthquakes at the depth of most continental earthquakes is principally studied. The results show that the variance of electrical resistivity has the regional characteristics,and relates to magnitued and po- sition of earthquakes near the profile.

关 键 词：地震前兆 电性变化 祁连山 大地电磁测深 

分 类 号：P318.5[天文地球—固体地球物理学] P631.325[天文地球—地球物理学]