平凉崆峒区地下水水化学特征及锶型矿泉水形成机理初步探究  

GROUNDWATER CHEMISTRY CHARACTERISTICS AND FORMATION MECHANISM OF STRONTIUM MINERAL WATER IN KONGTONG AREA OF PINGLIANG

作　　者：魏莉莉 毛岳 王春晖 WEI Li-Li;MAO yue;WANG Chun-hui(The Second institute of Geology and Mineral Eaploration,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730020,China;Technology Innovation Center of Gansu Province Geothermal Resources Exploration and Development,Lanzhou 730020,730000;Geothermal Resources Exploration,Research and Development Center,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730020,China)

机构地区：[1]甘肃省地质矿产勘查开发局第二地质矿产勘查院,甘肃兰州730020 [2]甘肃省地热资源勘查开发技术创新中心,甘肃兰州730020 [3]甘肃省地质矿产勘查开发局地热资源勘查研究开发中心,甘肃兰州730020

出　　处：《甘肃地质》2024年第4期47-54,共8页Gansu Geology

基　　金：甘肃省地矿局创新中心资助项目(2022CX08号)。

摘　　要：平凉崆峒区地下水中富含锶元素,查明水中锶的来源及形成机理具有重要意义。采用最新水质测试数据,通过Piper三线图法分析地下水化学特征,并对锶型矿泉水形成机理进行初步探究。研究区地下水中阴离子以HCO_(3)^(-)为主,SO_(4)^(2-)次之;阳离子以Ca^(2+)、Na^(+)为主,Mg^(2+)次之。地下水化学类型以HCO_(3)-Ca·Mg型为主,丰富的HCO_(3)^(-)和SO_(4)^(2-)水为锶元素的水解和浸出创造了条件。地下水与周围岩石(矿物)发生长期水解和溶滤作用,以及地层中较高的锶丰度,为地下水最终富锶创造了条件。首先形成锶含量较高的碎屑岩类孔隙裂隙水和岩溶水,进而形成锶含量较高的地表水和沟谷第四系松散岩类孔隙水,地表水与地下水之间联系密切。Pingliang Kongtong area groundwater is rich in strontium elements,so it is of great significance to find out the source and formation mechanism of strontium in the water.Using the latest water quality test data,the chemical characteristics of groundwater were analyzed by Piper three-line map method,and the formation mechanism of strontium mineral water was preliminarily explored.In the groundwater study area,HCO_(3)^(-)-was mainly followed by SO_(4)^(2-),the cations were mainly Ca^(2+)and Na^(+),followed by Mg^(2+).The groundwater chemical type is mainly HCO_(3)^(-)-Ca·Mg type,and the abundant HCO_(3)^(-)and SO_(4)^(2-)water create conditions for the hydrolysis and leaching of strontium elements.The long-term hydrolysis and dissolution effect of the groundwater and the surrounding rocks(minerals),as well as the high strontium abundance in the stratum,create the conditions for the groundwater to be rich in strontium finally.First of all,the pore fissure water and karst water with high content of strontium are formed,and then the surface water and the quaternary loose rock with high strontium content are formed,and the surface water and groundwater are related closely.

关 键 词：地下水水化学 富锶矿泉水 Piper三线图法 形成机理 崆峒区 

分 类 号：P641.5[天文地球—地质矿产勘探]