Electrical Structure of Yarlung Zangbo Suture from Magnetotelluric Profiling of INDEPTH-MT

The INDEPTH-MT results show that there are no electrical features of deep fractures along the Yarlung Zangbo River, but a large high-conductivity body exists in the area between Gyangze and Rinbung. It dips northward, extends downward up to the depth of about 55 km and indicates the exposure of the possible real position of the Yarlung Zangbo suture. There are three sets of electrical gradient and distorted zones reflecting the structure of faults in the high-conductivity re gion. These three fault belts, which dip northward and gradually converge downward to the main fault belt, and a series of south-dipping faults in the north side form the exhaled structural characteristics of the Yarlung Zangbo suture. There is a close relationship between the large high-conductivity body and the underground thermal state.