Hydrogeochemical characteristics of groundwater and pore-water and the paleoenvironmental evolution in the past 3.10 Ma in the Xiong’an New Area,North China

作     者：Kai Zhao Jing-xian Qi Yi Chen Bai-heng Ma Li Yi Hua-ming Guo Xin-zhou Wang Lin-ying Wang Hai-tao Li Kai Zhao;Jing-xian Qi;Yi Chen;Bai-heng Ma;Li Yi;Hua-ming Guo;Xin-zhou Wang;Lin-ying Wang;Hai-tao Li

作者机构：Hebei Key Laboratory of Geological Resources and Environment Monitoring and ProtectionShijiazhuang 050021China China Institute of Geo-environmental monitoringChina Geological SurveyBeijing 100081China Technical Centre for SoilAgriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China Lianhe Equator Environmental Impact Assessment Co.Ltd.Tianjin 300042China China University of Geoscience(Beijing)Beijing 100083China Hebei Geological Environment Monitoring InstituteShijiazhuang 050021China 

出 版 物：《China Geology》 (中国地质（英文）)

年 卷 期：2021年第4卷第3期

页      面：476-486页

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：The study was financially supported by the National Natural Science Foundation of China(41807220) the Open Fund Project of Hebei Key Laboratory of Geological Resources and Environment Monitoring and Protection(JCYKT201903) the projects of the China Geological Survey(DD20160239 and DD20189142) 

主　　题：Groundwater Pore-water Hydrogeochemistry Stable oxygen isotope Paleoclimate change Paleoenvironmental reconstruction Hydrogeological survey engineering Xiong’an New Area North China 

摘      要：The groundwater level has been continuously decreasing due to climate change and long-time overexploitation in the Xiong’an New Area,North China,which caused the enhanced mixing of groundwater in different aquifers and significant changes in regional groundwater chemistry *** this study,groundwater and sediment pore-water in drilling cores obtained from a 600 m borehole were investigated to evaluate hydrogeochemical processes in shallow and deep aquifers and paleo-environmental evolution in the past ca.3.10 *** showed that there was no obvious change overall in chemical composition along the direction of groundwater runoff,but different hydrochemical processes occurred in shallow and deep groundwater in the vertical *** groundwater(1000 mg/L)and high concentrations of Mn and Fe,while deep groundwater had better water quality with lower *** high TDS values mostly occurred in aquifers with depth500 m below land *** isotopes showed that aquifer pore-water mostly originated from meteoric water under the influence of evaporation,and aquitard pore-water belonged to Paleo meteoric *** addition,the evolution of the paleoclimate since 3.10 Ma BP was reconstructed,and four climate periods were determined by theδ18O profiles of pore-water and sporopollen records from sediments at different *** can be inferred that the Quaternary Pleistocene(0.78‒2.58 Ma BP)was dominated by the cold and dry climate of the glacial period,with three interglacial intervals of warm and humid ***’s more,this study demonstrates the possibilities of the applications of pore-water on the hydrogeochemical study and further supports the finding that pore-water could retain the feature of paleo-sedimentary water.