淄博市淄川区饮用天然矿泉水赋存条件与形成机理研究

淄博市淄川区饮用天然矿泉水按照含水层性质可划分为松散岩类孔隙水、碳酸盐岩类裂隙岩溶水和岩浆岩类构造裂隙水3大类。区内29眼井泉监测点饮用天然矿泉水检测结果显示,研究区存在锶型、锂型和锶锂复合型3种类型矿泉水。从水岩作用角度分析了矿泉水中锶和锂的来源,认为研究区广泛分布寒武纪碳酸盐岩,石灰岩尤其是鲕状灰岩中丰富的锶元素,是锶矿泉水形成主要的物源条件之一;地下水沿灰岩裂隙岩溶运动为矿泉水的形成创造了重要的水动力条件;研究区腐殖质经低矿化近中性的大气降水淋滤后,形成富含腐殖酸的偏酸性溶液入渗地下,对地下岩层产生溶解、溶滤作用,随着溶解过程的进行,岩石中的锶元素大量进入地下水中。

Study on Occurrence Conditions and the Formation Mechanism of Drinking Natural Mineral Water in Zichuan District of Zibo City

In accordance with potable aquifer properties, natural mineral water in Zichuan district of Zibo city can be divided into loose rock pore water, fissure karst water in carbonate rocks and magmatite class structural fissure water. As showed by drinking natural mineral water test results of 29 monitoring wells, there are 3 types of mineral water in studying area, such as strontium type, lithium type and strontium lithium type. From the aspect of water and rock interaction, the source of strontium and lithium in mineral water have been analyzed. It is regarded that Cambrian carbonate rocks are widely distributed in the area, rich strontium in limestone, particularly in oolitic limestone is one of the main sources of strontium mineral water. The movement of groundwater along the limestone karst fissure creat important hydrodynamic condition for the formation of mineral water. Humus in study area will form weak acidity humic acidic solution and infiltrated into underground after the leaching of nearly neutral atmospheric precipitation with low mineralization. It will cause the dissolution and leaching to underground rocks. Accompanying with the dissolution process, Sr in rocks will come into underground water in a large number.