MAGNETOTELLURICS FOR MINERAL EXPLORATION

The development of portable broadband MT systems has led to new applications of this method in mineral exploration surveys. A test of a new profiling tecnnique for mapping resistivity to a depth of 1.0 km has been carried out in the Carlin Gold District in Nevada. The goal of geophysical exploration in this region is to map physical properties which may be related to rock alteration brought about by mineralizing fluids. This mineralization has been controlled by faults and fracture zones that cross mapped contacts between different rock units. A generalized cross section perpendicular to regional strike for the area of this study is presented in Figure 1.