Geothermal distribution and their origin in Southwest China

摘要

Based on geothermal spring data, including geothermal fluid quantity, spring water temperature and reservoir temperature, geothermal resources in Provinces of Sichuan, Yunnan, Tibet in southwest of China are classified to high-temperature geothermal system according to geological characteristics and their geothermal manifesting. Temperatures of geothermal reservoir for the hot spring in the area are mostly above 150°C, which formed a huge and ideal advantageous region of high-temperature geothermal in southwest China. Origin of the geothermal systems are also concluded that the systems may be formed in three different settings, for instance, related to cooling magma chamber in shallow the Earth's crust, such as the Hot Sea geothermal field in Tengchong of Yunnan Province; related to S-type granite of continent-continent collision, such as Yabajain geothermal field in Tibet; and related to tectono-activity and deep-cycled high heat flow setting, such as Ruili geothermal field in Yunnan Province. According to basic geological and geothermal data, considering resource condition, technology, market demanding, policy support, geothermal is predominated by high-temperature geothermal system in southwest China with a high market demanding that is favorable for power generation and room-heating.