滦河流域中上游富锶地下水成因类型与形成机制 |
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关键词:strontium-rich groundwater Luanhe River Basin genetic type formation Chengde |
基金项目:中国地质调查局地质调查项目(编号: DD20160229-01; DD20190822) |
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摘要: |
Genetic Type and Formation Mechanism of Strontium-rich Groundwater in the Upper and Middle Reaches of Luanhe River Basin |
The Luanhe River Basin in Chengde City is rich in strontium-rich groundwater resources with various formation types, and hence it has typical research significance for the study of formation mechanism of mineral water. Based on hydrochemical graphic interpretation, multivariate statistical analysis, ion ratio analysis, and mineral equilibrium system, the authors analyzed the geochemical background for the formation of strontium-rich groundwater, elaborated hydrochemical characteristics of strontium-rich groundwater in various subregions, and investigated the formation mechanism of strontium-rich groundwater. The results show that the main hydrochemical types of groundwater are HCO3-Ca·Mg, HCO3·SO4-Ca, HCO3-Ca and HCO3·SO4-Ca·Mg. The formation of strontium-rich groundwater is controlled by geological structure and magmatic activity, influenced by the abundance of strontium elements in geological formations and restricted by hydrogeochemical conditions. The fracture structure and stratigraphic lithology control the general characteristics of distribution of strontium-rich groundwater, while hydrogeological conditions affect the geochemical response mechanism of the strontium element in groundwater. The strontium in groundwater of Luanhe River Basin mainly comes from weathering dissolution and cation exchange adsorption of feldspar minerals and carbonate minerals. The outcropping mechanism of mineral water can be divided into three types: deep cyclic leaching of tectonic faults, shallow cyclic leaching of fissures and enrichment of recharge type. The hydrochemical formation of Bashang Plateau pore and fissure water subsystem is mainly controlled by atmospheric precipitation and leaching, while the fracture water subsystem of the middle and upper reaches of the Luanhe River is controlled by the cation exchange adsorption. The hydrochemical formation of pore karst fissure water subsystem is mainly controlled by leaching and affected by evaporation and human activities. |
SUN Hou-yun,WEI Xiao-feng,GAN Feng-wei,WANG Heng,JIA Feng-chao,HE Ze-xin,LI Duo-jie,LI Jian,ZHANG Jing.2020.Genetic Type and Formation Mechanism of Strontium-rich Groundwater in the Upper and Middle Reaches of Luanhe River Basin[J].Acta Geoscientica Sinica,41(1):65-79. |
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