摘要
大同盆地是典型的高氟地下水分布区,其分布规律和成因在类似地区具有代表性。在对盆地地下水水化学特征和空间变化特征分析的基础上,深入讨论了高氟地下水的空间分布规律、控制因素及其形成的水文地球化学过程。结果表明,整个盆地浅层孔隙水中的氟质量浓度普遍较高,变化范围为0.29~6.22mg/L,平均值为1.82mg/L。氟质量浓度高值区主要分布于盆地中部和北部,呈现出由盆地边缘至盆地中心,质量浓度趋向于升高的变化规律。强烈的蒸发浓缩作用以及高pH、高碱度、高钠低钙含量的水化学特征有利于氟富集。大同盆地高氟地下水的形成是含氟矿物的溶解、离子交换和蒸发浓缩作用等水文地球化学过程共同作用的结果。
The distribution and causes of high fluoride groundwater in Datong Basin is typical in similar are- as. On the basis of statistical analysis of hydrochemical characteristics,the influence factors and formation mechanism of high fluoride groundwater in Datong Basin was studied. The results showed that F- content in shallow groundwater ranges from 0.29 to 6.22 mg/L, at an average of 1.82 mg/L. The regions with high fluorine content are mainly distributed in the central and northern parts of the basin. From the margin to the center of the basin, the concentration of fluoride tends to increase. The favorable conditions of fluor- ide enrichment include：strong evaporation, higher pH value,high alkalinity, high sodium and low calcium content. The fluorine-containing mineral dissolution, ion exchange and evaporation are the dominant processes of high fluoride groundwater in Datong Basin.
出处
《地质科技情报》
CAS
CSCD
北大核心
2014年第2期154-159,共6页
Geological Science and Technology Information
基金
国家高技术发展计划(863计划)项目(2012AA062602)
关键词
高氟地下水
分布
形成机制
水文地球化学作用
大同盆地
high fluoride groundwater
distribution
formation mechanism^hydrogeochemistry
Datong Basin
