| Title | Geochemistry of Potential High Temperature Geothermal Resources in Kangding, Sichuan, China |
|---|---|
| Authors | Zihui CHEN, Yi XU, Keyan ZHENG |
| Year | 2015 |
| Conference | World Geothermal Congress |
| Keywords | geochemistry, geothermal, Kangding |
| Abstract | High temperature geothermal fluid with wellhead temperature of 174C was found in recent year in Kangding County, Sichuan Province, China. High temperature geothermal resources in China concentrate upon Himalayan Geothermal Zone in Tibet. Kangding is located close to the northeastern margin of Himalayan Geothermal Zone. Kangding geothermal field is fractured reservoir within granite and a few sandstone of Permian System. Geothermal water in the reservoir is Cl.HCO3-Na type with total dissolved solids of 2457-3114 mg/L. The geothermal water is mineral water with higher concentrations of silica 186.2mg/L, fluorine 12.71mg/L and lithium 7.965mg/L. The lower molecule ratio of Na/K as 6.07-19.66 means a higher reservoir temperature. Geothermometry also shows higher K-Mg temperature, K-Na temperature and silica temperature as 179.8C, 224.4C and 175.1C respectively. These geochemical features are similar with the characteristics of high temperature geothermal resources in Yangbajain and Yangyi geothermal fields in Tibet. This discovery enlarges the distribution range of high temperature geothermal resources in China. It is hopeful to use the resources for geothermal power generation and integrated utilization in Kangding region. |