天然电磁辐射测深技术的应用

Application of natural electromagnetic radiation sounding technique

天然电磁辐射测深技术是一项利用天然电磁场探测地球介质相对电阻率与介质埋深的地球物理探测技术．此项技术主要探测在天然电磁场作用下在近地表形成的综合电场的垂直分量，根据其频谱的局部变化构制岩层相对电阻率与埋藏深度的直方图，进而对地下岩层的性质和分布特征作出合理的分析和判断．本文主要以探测实例说明本项技术的应用效果及其适用的范围．

Natural electromagnetic radiation sounding technique is a kind of geophysical technique to prospect the rela-tive resistivities of the crust media and their depth in the earth by natural electromagnetic field around the earth.Thistechnique mainly picks up the vertical component of the synthetic electricity field near the ground surface generated bynatural electromagnetic radiation.According to the spectrum features of the synthetic electricity field,the propertiesof the media and their distribution can be rationally analyzed.In order to explain the application effect and its applica-ble situations of the technique,several sounding examples are introduced in this paper.