赣南青塘岩溶盆地系统地下水氢氧同位素特征分析  

Analysis of Groundwater Hydrogen and Oxygen Isotope Characteristics of Karst Basin System in Qingtang,Southern Jiangxi

作　　者：何文城 刘前进 黄旭娟 汪明有 HE Wencheng;LIU Qianjin;HUANG Xujuan;WANG Mingyou(Jiangxi Nonferrous Geology and Mineral Resources Exploration and Development Institute,Nanchang,Jiangxi 330030)

机构地区：[1]江西有色地质矿产勘查开发院,南昌330030

出　　处：《四川地质学报》2024年第3期472-477,共6页Acta Geologica Sichuan

基　　金：中国地质调查局项目“赣江流域水文地质调查”(DD20190329)。

摘　　要：基于赣江流域水文地质调查(1∶5万青塘幅)项目,通过地面调查、地下水样采集、实验测试、数据综合分析等手段,研究青塘岩溶盆地系统地下水氢氧同位素特征。研究表明,盆地内不同地下水取样点δ^(18)O、δD及d值差异明显,δ^(18)O值的变化范围为-6.55‰~-4.45‰,均值为-5.85‰;δD值的变化范围为-38.25‰~-27.90‰,均值为-34.47‰;d值的变化范围为7.70~14.15,均值为12.34。对青塘岩溶盆地内地下水氢氧同位素特征综合分析研究,揭示了该地区地下水的补给主要来源于大气降水,第四系地下水与岩溶地下水具有密切的水力联系,地下水与地表水存在一定的关联,为该地区地下水污染防治提供依据。Based on the Ganjiang River basin hydrogeological survey(1:50,000 Qingtang area)project,the characteristics of hydrogen and oxygen isotopes of groundwater in Qingtang Karst basin system were studied by means of ground survey,groundwater sample collection,experimental test and comprehensive data analysis.The results show that theδ^(18)O,δD and d values of different groundwater sampling points in the basin are significantly different.Theδ^(18)O andδD value ranged from-6.55‰to-4.45‰,-38.25‰to-27.90‰,with an average value of-5.85‰and-34.47‰,respectively.The The d value ranges from 7.70 to 14.15,with an average value of 12.34.The comprehensive analysis of hydrogen and oxygen isotope characteristics of groundwater in Qingtang Karst Basin reveals that the recharge of groundwater in this area mainly comes from atmospheric precipitation.There is a close hydraulic relationship between quaternary groundwater and karst groundwater,and a certain correlation between groundwater and surface water,which provides a basis for groundwater pollution prevention in this area.

关 键 词：地下水 氢氧同位素 氘过量参数 大气降水线 青塘岩溶盆地 赣南 

分 类 号：P575.9[天文地球—矿物学]