甘肃地区电导率异常的研究

甘肃地区有三个高导异常带:嘉峪关与河西堡之间的近北东向DV型高导异常带,景泰地区的HC型异常带以及定西和天水之间的近东西向DV型高导异常带。根据E.C.Bullard的观点我们指出三者的埋藏深度大约从地壳一直延伸到上地幔。同时也根据地下水和温泉分布等资料分析了产生高导异常带的可能原因,并论述了这些高导异常带在地震预报中的重要地位。

RESEARCH ON ELECTRICAL CONDUCTIVITY ANOMALY IN GANSU REGION

In this paper we points out that there are three high electrical conduc-tivity anomaly (HECA) belts within Gansu province.One is the DV pat-tern north-east belt of HECA between Jayuguan and Hexibao,the other two are the HC pattern area of HECA in Jingtai and the DV pattern east-west belt of HECA between Dingxi and Tianshui.According to E.C.-Bullar''s view,we suggest that their buried depth be from the crust to upper mantle.In addition,based on the distribution of underground water and hot springs,we analyse the cause of HECA.Consequently,it is emphasized that these high conductivity regions play an important role on the earthquake prediction.