1Basokur A T, Rasmussen T M, Kaya C, et al. Comparison of induced- polarization and controlled-source audio-magnctotellurics methods for massive chalcopyrite exploration in a volcanic area [ J ]. Geophysics, 1997,62(6) :1087 - 1096.
2Sandberg S K, Hohmann G W. Controlled - source audio - magnetotel- lurics in geothermal exploration [ J ]. Geophysics, 1982,47 ( 1 ) : 100 -116.
7Unsworth J M, Bryan J T, Alan D C. Electromagnetic induction by a fi- nite electric dipole source over a 2-D earth[ J]. Geophysics, 1993,58 (2) :198 -214.
