安庆大别山区矿泉水化学特征及成因模式  

Chemical characteristics and genetic model of mineral water in Dabie Mountain area of Anqing City

作　　者：李云峰[1] 张庆 周小平 陆远志 牛晓楠 赵晓丹[1] 周训[2] LI Yunfeng;ZHANG Qing;ZHOU Xiaoping;LU Yuanzhi;NIU Xiaonan;ZHAO Xiaodan;ZHOU Xun(Nanjing Center,China Geological Survey,Nanjing 210016,Jiangsu,China;School of Water Resources and Environment,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国地质调查局南京地质调查中心,江苏南京210016 [2]中国地质大学(北京)水资源与环境学院,北京100083

出　　处：《华东地质》2021年第2期193-201,共9页East China Geology

基　　金：中国地质调查局“安庆多要素城市地质调查项目(编号:DD20189250)”项目资助。

摘　　要：安庆大别山区位于大别山造山带东侧,调查研究了该区饮用天然矿泉水6处(锶偏硅酸型2处,锶型1处,偏硅酸型3处),理疗天然矿泉水硅酸水3处。在分析矿泉水的水化学特征和环境同位素特征的基础上,进一步探讨其成因模式。冷泉(井)水(AH1、AH3、AH4、AH5、AH8和AH9)的主要离子为Ca2+、Mg2+、Na+和HCO3-,水化学类型为HCO3·Ca型、HCO3Ca·Na型或HCO3Ca·Mg型,TDS值为90~239 mg/L;温泉(AH2、AH6和AH7)的主要离子为Na+和SO42-,水化学类型为SO4Na型或SO4·HCO3Na型,TDS值为253~426 mg/L。利用δ2H值和δ18O值估算的冷泉水的补给区高程为217~346 m,平均温度为17.7℃;温泉水的补给区高程为457~668 m,平均温度为12.6℃。9处矿泉水均为大气降水补给,沿断裂带或裂隙带历经一定深度的循环,在山谷、河谷地带出露地表。温泉地下水的循环深度大、水岩作用时间长,TDS值、特征化学组分含量均高于冷泉水。Anqing Dabie Mountain area is located in the east side of Dabie Mountain orogenic belt.There are 2 strontium metasilicate mineral water points,1 strontium mineral water point and 3 metasilicate mineral water points being studied.The genetic model is further discussed based on the analysis of the hydrochemical and isotopic characteristics of mineral water in the area.The main ions in the cold spring(well)water(AH1、AH3、AH4、AH5、AH8 and AH9)are Ca2+,Mg2+,Na+and HCO-3,the hydrochemistry type is HCO3-Ca,HCO3-Ca·Na or HCO3-Ca·Mg,and the total dissolved solid is 90~239 mg/L.The main ions in hot spring water(AH2,AH6 and AH7)are Na+and SO2-4,the hydrochemistry type is SO4-Na or SO4·HCO3-Na,and the total dissolved solid is 253~426 mg/L.Based on theδ2H andδ18O values,the elevation of the recharge area of cold spring water is estimated to be 217~346 m,and the average temperature of the recharge area is 17.7℃.The elevation of the hot spring's recharge area is 457~668 m,and the average temperature of the recharge area is 12.6℃.The mineral water in the 9 places is supplied by atmospheric precipitation,which circulates along the fault zone and fissure zone to a certain depth and is exposed in the valley.The results show that the circulation depth of hot spring groundwater is large,the time of water rock interaction is long,and the TDS value and characteristic chemical component content of hot spring groundwater are higher than those of cold spring groundwater.

关 键 词：大别山区 矿泉水 地下水化学特征 成因模式 

分 类 号：P641.3[天文地球—地质矿产勘探]