Hydrogeochemical characteristics of typical mid-temperature hot springs in northern and southern Jiangxi

Abstract

: In order to implement the ″double carbon″ goal and promote the sustainable development and utilization of China′s geothermal resources, the hydrochemical characteristics of Bailing Hot Spring in northern Jiangxi and Tanghu Hot Spring and Baishi Hot Spring in southern Jiangxi were studied by isotopic method and multi-mineral equilibrium simulation. The results showed that Bailing Hot Spring (85 ℃ ) is weak alkaline HCO 3 -Na type silicon-fluorine water, and its TDS content, H 2 SiO 3 content and main ion concentration are lower than those of Tanghu Hot Spring (89 ℃ , weak alkaline HCO 3 -Na type silicon-fluorine water) and Baishi Hot Spring (85 ℃ , weak alkaline SO 4 -HCO 3 -Na type silicon-fluorine water). Although the water of the three hot springs is derived from atmospheric precipitation, the underground retention