前言从许多公开发表的文献中可以看到,过去几年人们对磁大地电流法(MT)在石油、天然气、地热等能源勘探中应用的兴趣又增加了。归纳所涉及的方法,可以看出,几种技术或者结果,都是从其它的物探方法如地震或直流电(DC)中借鉴来的。例如 Van′yan(1957)指出了 MT 输入阻抗的数学公式与 Preface From many of the published literature, it has been observed that over the past few years there has been an increased interest in magnetotelluric current (MT) applications for energy exploration in the oil, gas and geothermal sectors. To summarize the methods involved, it can be seen that several techniques or results are borrowed from other geophysical methods such as earthquakes or direct current (DC). For example Van’yan (1957) points out the mathematical formula for MT input impedance