The deep electrical structure of the middle section of the Sanjiang tectonic belt and its adjacent regions

Abstract

The Sanjiang tectonic belt is located at the junction of the eastern of the Himalayan-Tethys and the Pacific tectonic domain, is part of the lateral collision zone of the southeastern margin of the Qinghai-Tibet Plateau. And influenced by the Pacific plate, it is a very complex area with active volcanism and good metallogenic conditions. The existence of the mid-lower crustal material flow in the Qinghai-Tibet Plateau, including the Sanjiang area, has been confirmed by deep geophysical and GPS research. But, is the current speculative crustal material flow accurate? What is the relationship between the deep structure and mineralization? Many issues require further study. So we conducted for a magnetotelluric (MT) profile, namely the Fugong-Luliang, in the middle section of the Sanjiang tectonic belt. By combining with geological structure, lithogeochemistry, and related geophysical data of this orogen, we analyzed the electrical contact relationship between the main blocks and structures passing through, and built a deep electrical structural model of the middle section of the Sanjiang tectonic belt and its adjacent regions.