Hydrochemical characteristics and genesis analysis of hot springs in Shangrila Region
In order to understand the status of geothermal resources in the Shangrila Region,the Tianshengqiao Hot Spring and Xiagei Hot Spring were taken as research objects.Water chemistry analysis,hydrogen and oxygen isotope analysis,and geothermal temperature scale method were used to analyze the hydrochemical characteristics of the geothermal system,groundwater recharge sources,and thermal storage temperature of Tianshengqiao Hot Spring and Xiagei Hot Spring.The results indicate that the hydrochemical types of Tianshengqiao Hot Spring are HCO3-Ca·Na type and HCO3-Na·Ca type,while the Xiagei Hot Spring are HCO3·Na type and HCO3-Na·Ca type.Both Tianshengqiao Hot Spring and Xiagei Hot Spring are sourced from atmospheric precipitation and exhibit 18O drift phenomenon.The recharge elevations are 3 710 m and 3 842 m,respectively,located in the southeast direction of the hot springs in the area of Shina.The recharge temperatures are-11.98℃and-12.91 ℃,respectively,and both are immature water.The proportions of cold water mixed in Tianshengqiao Hot Spring and Xiagei Hot Spring are 52％and 72％,respectively.The thermal storage temperatures calculated using the SiO2 geothermal temperature scale method are 98℃and 160 ℃,respectively.
hydrochemical analysisisotopes analysisgeothermal temperature scale methodTianshengqiao Hot SpringXiagei Hot SpringShangrila Region
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