甘肃省地电台址条件研究

STUDY ON THE CONDITIONS OF THE STATION LOCATION OF TELLURIC CURRENT IN GANSU PROVINCE

摘要:

本文着重分析讨论了甘肃省内十五个地电台站的岩性条件、覆盖层岩性及厚度的影响、水文地质条件及电性条件,並从物理机制上对温度给予电阻率的影响进行了粗浅的分析,认为用电测深法定期监测震源深度的电阻率变化反应震源区地温度化是予报地震的有效手段。在地电研究室其他同志的配合下作者对省内大多数台站作了垂向电测深工作,並着重对嘉峪关台老布极区作了电测剖面,解释了该台原布极道电阻率年变化与地下水形态成反常关系的原因。作为对上述讨论的台址条件的检验与印证,文章对历年来在地电台站附近发生的258个地震与电阻率异常对应关系作了统计和分析。並综合评述了省内地电台站台址条件的优劣状态。

Abstract:

The lithologic character conditions of 15 telluric curreng stations in Gansu Province are focussed to be analysed and discussed in this paper, so are the tectum and the influecnce from its thickness, the conditions of hydrogeology and telluric current.A superficial analysis is made about the influence on the resistivity from temperature with a view of physics mechanism. We consider it an effective mtehod in earthquake prediction that the variation of the resistivity at the depth of hypocenter monitored at regular intervals dy electrical sounding can tell us the variation of the temperature in earthquake source. With the help of the colleagues, the author has done the work of ortho-electrical sounding in most of the stations in Gansu Province. Meanwhile focal point of this work is to make the electrical measuring profile in the previous pole regions of Jiayuguan station and it is explained that why the abnormal relationship can be built between the annual variation of resistivity of the previous pole lines at this station and the morphogenesis of underground water.To verify and confirm the aboved-mentioned conditions of the station location, it is necessary in this paper for 258 earthquakes occurred near the station for years to be counted up and for the relationship between these shocks and the amomalies of resistivity to be analysed. A synthetic comment is presented here on the favourable and unfavourable conditions of the station location in Gansu Province.