山区进行可控源探测断层的尝试

Attempt of CSAMT to Detect Faults in Mountainous Areas

该文通过实例,介绍了CSAMT方法的原理、装置布置和数据处理。首先根据探测区域的地质资料和地形设计最佳观测方案;在保证接收信号足够强的情况下,根据测区实际地形情况适当调整收发距,使观测点处于远区;在数据处理过程中为克服静态效应的影响,引入了7点数字滤波器;针对高山区地形影响较大的不利条件,先做简单的地形校正预处理,再进行反演。反演后的结果与实际地质情况符合较好,说明了该方法在山区进行探测的有效性。

Through the actual examples,the principles,the device layout and data processing of the CSAMT method are introduced.First,the best observation schemes are designed according to the geological data and terrain in detection area;on the condition of guaranteeing receive signal enough strong,according to actual terrain conditions in detection area,the distance between transmitter and receiving should make suitable adjustment so as to the observation point to be in the far area.In the data processing process,in order to overcome the static effect influence,seven digital filter are introduced;aimed at the bad condition in high land terrain, first the terrain correction is made simple pretreatment,then the self-compiling program is inversed.At last the inversion results are well accord with the actual geological situation,and it shows the good effect in the detection of mountain ous areas.