四川白玉县拉龙措温泉水文地球化学特征及热水来源

Hydrologic geochemistry characteristics and hot water sources of hot spring in Lalong Lake,Baiyu County,Sichuan Province

拉龙措温泉位于白玉县拉龙措国家湿地公园,其开发有利于提升旅游品质与环境保护。本文通过采集温泉水样2组,以水化学、同位素、地热温标等研究方法,分析拉龙措温泉的水文地球化学特征、补给来源、热储温度以及循环深度等。研究显示:拉龙措天然温度为71~73℃,p H值为6.35~6.22,TDS值范围为916~957 mg/L,水化学类型为HCO_(3)^(-)—Na型,属于未成熟水,补给来源主要为北侧与东侧高程4539~4702 m处的大气降水和冰雪融水。利用二氧化硅地热温标法和硅-焓图解法分别计算出浅部冷水混合后热储温度75.3~120.9℃,深部热储温度154.2~194.4℃,冷水混合比例66.44%~73.12%,深部循环深度为3072~3876 m,浅部冷水混合后热储温度75.3~120.9℃,循环深度为1496~2406 m。本文研究成果有望为拉龙措温泉资源的开发利用提供有力支撑。

The hot spring water in Lalong Lake is located in the Lalong Lake National Wetland Park in Baiyu County,and its development is conducive to improving tourism quality and environmental protection.This paper collects two sets of hot spring water samples and analyzes the hydrogeochemical characteristics,supply sources,thermal storage temperature,and circulation depth of the hot spring water in Lalong Lake using research methods such as hydrochemistry,isotopes,and geothermal temperature scales.The research shows that the natural temperature of hot spring water in Lalong Lake is 71-73℃,with a pH value is 6.35-6.22,and a TDS is 916-957 mg/L.The hydrochemical type is HCO_(3)^(-)—Na,which belongs to immature water.The main sources of replenishment are atmospheric precipitation and melting ice and snow at elevations of 4539-4702 m on the north and east sides.Using the silicon dioxide geothermal temperature scale method and the graphical method of silicon-enthalpy,the thermal storage temperature after mixing shallow cold water is calculated to be 75.3-120.9℃,the deep thermal storage temperature is 154.2-194.4℃,the cold water mixing ratio is 66.44-73.12%,the deep circulation depth is 3072-3876 m,the thermal storage temperature after mixing shallow cold water is about 75.3-120.9℃,and the circulation depth is 1496-2406 m.The results of this research are expected to provide strong support for the development and utilization of hot spring resources in Lalong Lake.