重庆金佛山泉水地球化学特征及其空间分布意义  

Geochemical characteristics and spatial distribution of spring water at Jinfo Mountain,Chongqing

作　　者：高彦芳[1] 李红春[1,2] 沈立成[1] 杨平恒[1] 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]成功大学地球科学系,中国台湾台南70101

出　　处：《中国地质》2008年第2期322-330,共9页Geology in China

基　　金：西南大学自然地理学科开放基金(250-411108);教育部博士点基金(20050635001);重庆市科委院士专项(CSTC，2006BC7002);国家自然科学基金项目(40672165)资助

摘　　要：2006年7月和9月在重庆金佛山地区选取22个地下水出露的泉点.对泉水的地球化学性质进行详细调查。利用野外和实验室测量手段得到了主要阴离子和阳离子浓度与物理化学参数。分析得知:研究区泉水的水化学类型为Ca-HCO_3和Ca、Mg-HCO_3;结合地质和地貌背景把它们分为6个泉群,分别讨论各泉群的空间分布意义;估算泉水方解石(SI_C)、白云石(SI_D)和石膏(SI_G)的饱和指数,即可反映地层岩性、地形和地下水的运移时间对水质的影响,该区地下水基本上是来自大气降水的下渗.没有深部含水层的上升混合.这些泉水的地球化学特征以及它们的空间分布规律能够很好地反映区内地质状况.该研究可以为金佛山地区地下水资源的调查和环境保护提供基础数据。Spring waters of twenty-two springs at Jinfo Mountain, Chongqing, were sampled and their geochemical characteristics were studied in detail during July and September 2006. Field and hboratory measurements of the concentrations of major cations and anions and other physico-geochemical parameters in the spring waters show that the hydrochemical types of these springs are Ca-HCO3 and Ca and Mg-HCO3, and on that basis, combined with the geological and geomorphological characteristics of the springs, six spring groups may be identified and the significance of the spatial distribution of these spring groups are discussed. The authors calculated the saturation indexes of calcite, dolomite and gypsum in the springs, which can indicate the influences of the lithology of the strata, topography and residence time of groundwater on the water quality. The results show that the spring waters in the area mainly come from penetration of meteoric water, without mixture of groundwater from the deep aquifer. The geochemical characteristics and spatial distribution of the spring waters may well reflect the geology of the study area. This study may provide baseline data for the investigation of groundwater resources and protection of the environment in the Jinfo Mountain area.

关 键 词：重庆金佛山 泉水 地球化学 区域地质 岩溶地区 

分 类 号：P641.3[天文地球—地质矿产勘探]