Abstract:Geothermal resources are abundant in western Sichuan, and several high-temperature geothermal fields are distributed from Zhonggu to Laoyulin in Kangding. The distribution characteristics of geothermal energy in the region were analyzed by gravity and magnetic data as well as the geological structural background of western Sichuan, with a focus on applying broadband magnetotelluric sounding, audio magnetotelluric sounding profiles, and drilling data to explore geothermal elements at different depths and scales in the study area. The research shows that a large number of geothermal spots are developed near faults, showing a clear spatial distribution correlation. The primary heat source for the high-temperature geothermal field in this region is the partially melting body beneath the Xianshuihe fault zone. The crossing east-west fault structures and the secondary structures of the north-south deep fault primarily govern Laoyulin thermal field. A thermal reservoir and a route for the upwelling of deep hot water are formed by the fault fracture zone. This article explores the multi-scale geophysical structure of the Kangding area in western Sichuan. The formation and distribution of high-temperature geothermal resources are closely related to the coupling of multiple factors. A three-dimensional geothermal geological model of this area has been constructed. The Kangding area in western Sichuan has favorable conditions for the formation of high-temperature geothermal water, and the development of geothermal resources can promote the social and economic development of the region.
