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一般认为碎屑岩裂隙水的水质是优良的。著名的杭州虎跑泉和无锡天下第二泉等,已作为饮料矿泉水开发。 近年来,在江苏、安徽等地开发利用裂隙水过程中,我们注意到,有些地区水中铁和锰的含量比较高,超过饮用水水质标准,有的甚至超过几十倍。 碎屑岩裂隙水中铁、锰含量的空间分布和变化特点,主要决定于元素本身的地球化学性质。分析研究表明,碎屑岩裂隙水中铁、锰的含量显示出一定的分布规律,它们的富集还与一定的地质、水文地质条件有关。 泥盆纪、侏罗纪碎屑岩裂隙水中铁锰的含量,在垂直方向上呈现浅部(泉、浅井水)低,深部高的特点。在水平方向上,浅部变化不大,一般含量都比较低;深部因地质、水文地质条件不同而有很大的差异。 对这种裂隙水的开发利用,应特别注意地下水化学成分的形成条件,尽量避开水中铁锰大量富集的地段。开采的深度应控制得浅一些,而以氧化环境的水为宜。
It is generally believed that the quality of clastic rock fissure water is excellent. Well-known Hangzhou Tiger Spring and the second world Wuxi, etc., has been developed as a beverage mineral water. In recent years, in the development and utilization of fissure water in Jiangsu and Anhui, we noticed that the content of iron and manganese in water in some areas is relatively high, exceeding the standards for drinking water quality, and some even exceed several times. The spatial distribution and variation of iron and manganese content in clastic rock fissure water are mainly determined by the geochemical properties of the element itself. Analysis shows that the content of iron and manganese in the clastic rock fissure water shows a certain distribution, and their enrichment is also related to certain geological and hydrogeological conditions. In the Devonian and Jurassic clastic fissures, the content of Fe and Mn in the vertical direction shows the characteristics of shallow (spring, shallow well water) low and deep high. In the horizontal direction, the shallow part has little change, and the average content is relatively low; the deep part has great difference due to the different geological and hydrogeological conditions. For the development and utilization of this fissure water, special attention should be paid to the formation conditions of groundwater chemical components, avoiding the large areas where iron and manganese are abundantly enriched. The depth of mining should be controlled shallow, but to the oxidation of water is appropriate.