Magnetotelluric (MT) method is an important passive surface geophysical method which uses the Earth’s natural electromagnetic fields to investigate the electrical resistivity structure of the subsurface. The depth of investigation of MT is much higher than that of other electromagnetic (EM) methods. This paper includes an MT survey on the Inche-Boroon area located in the north of Golestan province, Iran to study subsurface electrical conductivity down to 1300 m.
As a result, two conductive layers were distinguished from 95 to 190 m and 250 to 660 m. These two layers are interpreted as the layers which consist of salt water and probably Iodine constructions.
An exploration borehole is located at 25 km SW of the area. 1D modeling of the MT data on the MT-site closeby the borehole shows reasonably a confirmation of a deep conductor.