中国地质2024，Vol.51Issue(3)：1046-1058,13.DOI:10.12029/gc20211224002
湖南省新田县富锶岩溶水矿物饱和指数特征,Sr2+、SO42-来源及开发潜力
Mineral saturation index characteristics,sources of Sr2+,SO42-and development potential of strontium-rich karst water in Xintian County,Hunan Province
摘要
Abstract
[Objective]There is limited research on the sources of strontium elementand the potential for the development and utilization of karst water in the large-scale strontium rich mineral water field in Xintian County,Hunan Province.Exploring the hydrochemical characteristics of strontium-rich karst water and the sources of strontium element can provide theoretical support for searching for strontium rich groundwater in karst areas.[Methods]PHREEQC software,water stoichiometry,end element method and hydrogeological parameters were used in this study to reveal the mineral saturation index characteristicsof strontium-rich karst water,as well as the sources of Sr2+and SO42-and its development potential through the hydrogeological investigation and hydrochemical testson groundwater in this strontium-rich mineral water field.[Results]Calcite is mainly saturated both in the springs and shafts,while dolomite changes from unsaturated in the springs to saturate in the shafts.Strontium is saturated in the shafts,and gypsum is unsaturated both in the springs and the shafts.In the springs,mineral saturation index increases with the total dissolved solids,and they areof a good positive correlation,but of a poor correlation in the shafts.The correlation of SO42-betweenthe springs and shaftsare positive.According to the stoichiometric relation of Ca2+,Mg2+,Sr2+,HCO3-and SO42-,SO42-in the shafts may come from gypsum dissolution.The Sr2+in the springsare mainly derived from strontium which replaces calcium with isomorphism in limestone,while Sr2+in the shafts probably come from strontium siderite in the aquifer.85.2%of the groundwatersamplings in the research area meet the national standard for drinking water quality,and the excess water samplings are mostly single indicator exceeding the standard.Through calculation,the natural recharge resources,exploitable resources and groundwater resource potential of strontium-rich groundwater in dry years are 3.83×107 m3/a、1.05×107 m3/a、7.28×106 m3/a respectively.[Conclusions]Strontium in the strontium-rich groundwater in Xintian County is mainly derived from the dissolution of strontium-containing minerals in Shetianqiao Formation strata of Devonian.Those minerals,including strontianite,were form by isomorphicly substitute of calcium with strontium.The amount and resource potential of strontium-rich groundwater are considerable,with a great value for development and utilization.关键词
富锶岩溶水/矿物饱和指数/Sr2+和SO42-/开发潜力/水文地质调查工程/新田县/湖南省Key words
strontium-rich karst water/mineral saturation index/Sr2+and SO42-/development potential/hydrogeological survey engineering/Xintian County/Hunan Province分类
天文与地球科学引用本文复制引用
赵光帅,苏春田,黄奇波,朱义年,杨杨,罗飞,李小盼..湖南省新田县富锶岩溶水矿物饱和指数特征,Sr2+、SO42-来源及开发潜力[J].中国地质,2024,51(3):1046-1058,13.基金项目
国家自然科学基金面上项目(42372294)、中国地质调查项目(DD20221758)联合资助. Supported by the National Natural Science Foundation of China(No.42372294)and the project of China Geological Survey(No.DD20221758). （42372294）
