HYDROCHEMICAL CHARACTERISTICS AND MIGRATION RULES OF STRONTIUM-RICH GROUNDWATER IN THE MIDDLE AND LOWER REACHES OF LIYUAN RIVER PLAIN
Based on the data obtained from the 2022 Gansu Provincial Bureau of Geology and Mineral Resources Innovation Fund Project,a study was conducted on the hydrochemical characteristics and circulation evolution process of strontium-rich groundwater in the middle and lower reaches Plain of the Liyuan River.The results indicate that the Total Dissolved Solids(TDS)of the mountain outlet river water ranges from 504 to 561 mg/L,with strontium content varying between 0.64 and 0.90 mg/L.In contrast,the TDS of groundwater in the plain area spans from 218 to 2 326 mg/L,with strontium content ranging from 0.48 to 4.04 mg/L,and an average strontium content of 1.31 mg/L,all of which meet the standards for drinking natural mineral water.The bedrock in the Qilian Mountains upstream of the Liyuan River is widely distributed,with relatively abundant strontium content and intense surface chemical weathering,which provides an abundant source of strontium for the mountain outlet river water and the Quaternary unconsolidated rock pore water infiltrated and formed in the middle and lower reaches.During the circulation and evolution of groundwater in the plain area,extensive water-rock interactions occur between the water and surrounding rocks.Along the flow path,the leaching and cation exchange processes continuously enrich the groundwater in strontium,while evaporation and concentration further intensify the enrichment of strontium in the groundwater overflow zone and shallow buried areas.Consequently,the middle and lower reaches of the Liyuan River Plain Area represent a favorable location for the exploration and development of strontium mineral water resources.
strontium-rich groundwaterhydrochemical characteristicsmigration and enrichment rulesmineral waterLiyuan River
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