Hydro-Chemical Characteristics, Genesis Analysis and Risk Assessment of Fuyuan Laochang Ore Concentration Area in Yunnan, China

Abstract

In order to reveal the characteristics of groundwater circulation in a typical basin in the mine area, the groundwater of different aquifers in Fuyuan Laochang Town, east of Qujing City, Yunnan Province, was taken as the research object. The recharge characteristics of groundwater in the study area were determined, and the material sources of the main constituents of groundwater were identified. Also, the water-rock interaction processes occurring in the study area were identified by analyzing conventional water chemistry and hydrogen and oxygen isotopes. The results show that the anions of water samples in the study area are mainly SO 4 2and HCO 3 -, while the cations are mainly Na + , Ca 2+ and Mg 2+ . The groundwater in the study area is mainly recharged by local atmospheric precipitation, and water vapor condensation may exist in the pit water and some underground water samples. The water-