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引用本文:查君珍,姜春露,陈星,安士凯,郑刘根,陈永春.淮南采煤沉陷区积水水文地球化学及氢氧稳定同位素特征.湖泊科学,2021,33(6):1742-1752. DOI:10.18307/2021.0611
Zha Junzhen,Jiang Chunlu,Chen Xing,An Shikai,Zheng Liugen,Chen Yongchun.Hydrogeochemistry and hydrogen and oxygen stable isotope characteristics of water in Huainan subsidence areas. J. Lake Sci.2021,33(6):1742-1752. DOI:10.18307/2021.0611
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淮南采煤沉陷区积水水文地球化学及氢氧稳定同位素特征
查君珍1, 姜春露1,2, 陈星1, 安士凯3, 郑刘根1, 陈永春3
1.安徽大学资源与环境工程学院, 安徽省矿山生态修复工程实验室, 合肥 230601;2.中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083;3.煤矿生态环境保护国家工程实验室, 淮南 232001
摘要:
以安徽淮南采煤沉陷积水为研究对象,通过样品采集与测试,研究不同沉陷年限及类型积水水文地球化学和氢氧稳定同位素组成特征及影响因素.结果表明:(1)研究区水化学类型主要为Cl-Na、HCO3·Cl-Na型,沉陷积水中常量离子主要来源于蒸发岩溶解和硅酸盐风化,受蒸发作用和人为活动的影响明显,水化学组成随沉陷时间和类型变化不大.(2)淮南大气降水线方程为:δD=8.85δ18O+18.73,沉陷区积水氢氧稳定同位素值在淮南大气降水线右下方依次分布并接近降水线,表明沉陷积水主要来源于大气降水.(3)在降水稀释、水体蒸发及地下水补给的作用下,随着沉陷年限的增加,积水中重同位素越来越贫化,同一年限不同类型的积水同位素值变化较小.
关键词:  淮南  沉陷积水  水化学  氢氧稳定同位素
DOI:10.18307/2021.0611
分类号:
基金项目:国家自然科学基金项目(41602310)和中国博士后科学基金项目(2017M611044)联合资助.
Hydrogeochemistry and hydrogen and oxygen stable isotope characteristics of water in Huainan subsidence areas
Zha Junzhen1, Jiang Chunlu1,2, Chen Xing1, An Shikai3, Zheng Liugen1, Chen Yongchun3
1.School of Resource and Environmental Engineering, Anhui Province Engineering Laboratory for Mine Ecological Remediation, Anhui University, Hefei 230601, P. R. China;2.College of Geoscience and Surveysing Engineering, China University of Mining & Technology, Beijing 100083, P. R. China;3.National Engineering Laboratory for Protection of Coal Mine Eco-environment, Huainan 232001, P. R. China
Abstract:
Taking the coal mining subsidence water in Huainan, Anhui Province as the research object, through sample collection and testing, the hydrogeochemistry, hydrogen and oxygen stable isotopic composition characteristics and influencing factors of different subsidence years and types of water are studied. The results show that:(1) The main types of water chemistry in the study area are Cl-Na and HCO3·Cl-Na. The major ions in the sedimentation water mainly come from evaporite dissolution and silicate weathering, and are affected by evaporation and human activities. Obviously, the chemical composition of water does not change much with the time and type of subsidence. (2) The Huainan atmospheric precipitation line equation is:δD=8.85δ18O+18.73. The hydrogen and oxygen stable isotopic values of the accumulated water in the subsidence area are distributed in sequence at the lower right of the Huainan atmospheric precipitation line and are close to the precipitation line, indicating that the subsided water mainly comes from atmospheric precipitation. (3) Under the effects of precipitation dilution, water evaporation, and groundwater replenishment, with the increase of the subsidence period, the heavy isotopes of the accumulated water become more and more depleted. The isotopic values of different types of accumulated water of the same age have little change, which is affected by the isotopes.
Key words:  Huainan  water in subsidence lake  hydrochemistry  stable isotopes of hydrogen and oxygen
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