贵州纳雍县沙包镇下木村富锶矿泉水成因分析及开采量计算

Origin analysis and mining quantity calculation of strontium-rich mineral water of Xiamu Village,Shabao Town,Nayong County,Guizhou

通过对贵州纳雍县沙包镇下木村研究泉点的水文地质条件、水化学特征、动态特征及微量元素锶来源等进行研究,分析其成因模式。研究成果表明:大气降水入渗含水岩组,径流运移中溶滤含锶膏岩矿物形成富锶地下水,在地形切割及中三叠统关岭组(T_(2)g)底部泥岩相对阻水出露成泉,水中锶含量达到饮用天然矿泉水标准,矿物质成分源于岩石和土壤的风化水解,水化学类型为HCO_(3)·SO_(4)^(-)Ca·Mg。根据动态监测成果,采用泉水流量衰减法及泉水枯季流量频率分析法,计算其允许开采量为1134.26 m^(3)/d,研究结果可为下木村锶型矿泉水的开发利用提供依据。

This paper has analyzed the origin model based on the study of the hydrogeological conditions,water chemistry feature,dynamic feature and the source of the micro element strontium of the spring spots.The research result shows that the precipitate water permeates into an aquifer group and lixiviates strontium-containing gypsolyte minerals in runoff migration to form strontium-rich underground water,which becomes spring due to terrain cutting and water blocking against the mud rock below Guanling Formation(T_(2)g).The water content of strontium meets drinking natural mineral water standards,mineral composition is the result of rock and soil weathering hydrolysis,hydrochemical type of HCO_(3)·SO_(4)^(-)Ca·Mg.The paper has also calculated the allowable exploitation quantity by adopting the spring flow attenuation method and the dry season spring flow frequency analysis based on the dynamic monitoring result.The calculation result can serve as a basis for development and utilization of strontium-rich mineral water of Xiamu Village.