昆仑河水化学特征及物源分析OA

River water serves as a key carrier for salt deposition in lakes,and its research could reveal the ore-forming material source and distribution rules.The river's hydrochemical characteristics,sources of solute compo-nents,and their controlling factors were investigated based on 103 samples collected at Nachitai Hydrological Sta-tion.The results showed that the pH value of the Kunlun River ranged from 7.8 to 8.1,and the annual average TDS was 411 mg/L,indicating weak alkaline water of moderate mineralization.The major ions in the river were Na+,Ca2+,Cl-,and HCO3,followed by Mg2+,K+,and SO42-.The ions Na+,Cl-,and SO42-were primari-ly derived from the dissolution of evaporates,and Mg2+mainly originated from the weathering of silicate rocks.The Ca2+was derived from a mixture of carbonate and silicate rock weathering,and HCO3-mainly came from at-mospheric carbon dioxide dissolution.The research findings have significant implications for tracing the formation and distribution of different types of evaporate mineral resources in Qaidam Basin.