摘要
本文依据水-岩相互作用理论及矿物的溶解沉淀规律,利用PHREEQC水文地球化学模拟软件对秦岭山前东大地区潜水、承压水水溶液组分平衡分布下的部分矿物的饱和指数进行定量计算,表明了水中主要离子含量的来源,且结果与离子比例系数的定性分析相一致。研究区地下水中离子含量受岩石溶滤作用的影响,Na+主要来源于岩盐及部分钠长石等硅酸盐矿物的溶解;Ca2+和Mg2+除主要来源于碳酸盐矿物方解石、白云石和硫酸盐矿物硬石膏的溶解外,还有部分来源于硅酸盐矿物伊利石、高岭石的溶解。
Based on the theory of water-rock interaction and the dissolution and sedimentation of minerals,the saturation index of some minerals in the groundwater of Dongda area under the equilibrium distribution of aqueous solution was quantitatively calculated by PHREEQC hydrogeochemical simulation software,and the source of the main ions content was consistent with the qualitative analysis of the ion scale factor.The results show that the ion content of groundwater in the study area is affected by the effect of rock filtration;Na+is mainly derived from the dissolution of silicate minerals such as rock salt and some albite;Ca2+and Mg2+contents are in addition to the dissolution of calcite and dolomite carbonate minerals and anhydrite sulfate mineral,there also some of the silicate minerals such as illite and kaolinite are dissolved.
关键词
东大地区
地下水
饱和指数
水-岩作用
矿物溶解沉淀
dongda area
groundwater
saturation index
water-rock interaction
dissolution and sedimentation of minerals
