Discussion on the relationship between Cenozoic magmatic activity and geotherm in Tibetan Plateau

There are abundant geothermal resources and nearly 700 geothermal display areas (points) in Tibetan Plateau with the characteristics of wide distribution, high temperature and great potentiality. It is necesssary to investigate the distribution regularity and causes of geothermal resources, in order to better evaluate the geothermal resources and explore the exploitation and development plan that conforms to the characteristics of the geothermal resources in Tibetan Plateau. On the basis of summarizing previous studies on the Cenozoic magmatic activity and the characteristics of geothermal resources in Tibetan Plateau, the authors analyzed the controlling factors of geothermal resources distribution from the perspective of geological evolution of the Tibetan Plateau, and discussed the relationship between Cenozoic magmatic activity and the geothermal resources spatial distribution. They focused on the relationship between the geothermal regionalization of Zangnan and the magmatic activity of the Yarlung Zangbo Suture Zone. The results show that the geothermal activity in Tibetan Plateau is controlled by the geological tectonic evolution. And the geothermal activity in southern region is stronger than that in the northern region. The main active area of geothermal activity is the intersection of the EW regional tectonic suture zone and the NS deep fault. The magmatic activity provides the heat source for geothermal resources in the study area.