龙子祠泉域岩溶水水化学-同位素特征  

Hydrogeochemical and isotopic characteristics of the karst groundwater systems in Longzici spring basin

作　　者：唐春雷[1] 梁永平[1] 王维泰[1] 赵春红[1] 申豪勇 TANG Chun-lei LIANG Yong-ping WANG Wei-tai SHENG Hao-yong(Institute of Karst Geology, CAGS / Key Laboratory of Karst Dynamics, MLR ＆ GZAR/ International Research Center on Karst under the Auspices of UNESCO, Guilin 541004, China)

机构地区：[1]中国地质科学院岩溶地质研究所/国土资源部广西壮族自治区岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心,广西桂林541004

出　　处：《桂林理工大学学报》2017年第1期53-58,共6页Journal of Guilin University of Technology

基　　金：中国地质局地质调查项目(12120114019101;DD20160242)

摘　　要：通过对2013年龙子祠泉域岩溶水进行调查及35组样品测试分析,利用舒卡列夫分类法进行分类,龙子祠泉域岩溶地下水以SO_4·HCO_3-Ca·Mg型水为主,其中SO_4^(2-)在岩溶水水化学类型以及地下水质量类别确定中具有重要作用。SO_4^(2-)主要有两种来源,分别由中奥陶统碳酸盐岩石膏溶解和煤系地层中黄铁矿的氧化产生。氢、氧同位素分析结果表明,龙子祠岩溶地下接受古水和现代水的混合补给。硫同位素研究分析得出龙子祠泉水中源于煤系地层的SO_4^(2-)的比例为22.22%,说明泉域地球化学背景对岩溶地下水造成的污染是重要因素,但与2004年的硫同位素结果计算比例(14.37%)相比较,目前泉水中源于煤系地层的SO_4^(2-)的比例增高7.85%。Through the investigation and analysis of 35 samplesin Longzici spring basin, the hydrochemicalcharacteristics were made by Shukallev classification. Karst groundwater is mainly composed of S04 ·HC03 - Ca ·Mg, the sulfate ion plays an important role in water chemistry and water quality. Sulfate ion of two kindsof sources mainly comes from gypsum or pyrite oxidation. The source of replenishment of groundwater in Longzi-ci spring basin is fossilwater and modem, from the test results of hydrogen and oxygen isotopes. Isotope analy-sis shows that the proportion of sulfate ion in coal measure strata is 22% , which indicates that the geochemicalbackground of the spring area is an important factor for the pollution of karst groundwater. But compared withthe calculation of sulfur isotope results in 2004 （14. 37% ） , the proportion of SO4^2- in coal-bearing strata is sig-nificantly high 7. 85%.

关 键 词：岩溶水 水化学 氢氧同位素 污染途径 龙子祠泉域 山西 

分 类 号：P641.134[天文地球—地质矿产勘探]