Analysis of deep geothermal temperature in Southeast Chongqing

Geothermal temperature is an important parameter for identifying genetic types and thermal sources. On the basis of analysing 13 geothermal water samples collected in Southeast Chongqing, this paper used various methods to calculate the deep thermal storage temperature in Southeast Chongqing, including the methods of steam-free loss quartz and steam loss quartz temperature scales, chalcedony a and b, modified SiO2 temperature scale, K-Mg, Na-Li, Na-K, Na-K-Ca and other cationic temperature scales. Meanwhile, and as well as the Na-K-Mg triangulation method and the mineral saturation index method were also employed to test the reliability of these methods. The results show that the average temperature of thermal storage calculated by SiO2 (no steam loss) temperature scale and modified SiO2 temperature scale is more applicable. The thermal storage temperature range of hot water points at various places is 62.78~124.81℃, and the average thermal storage temperature is 88.98℃.