Geochemical provenance and spatial distribution of fluoride in groundwater of Taiyuan basin,China |
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| Authors: | Xiangquan Li Xinwei Hou Zhichao Zhou Lingxia Liu |
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| Institution: | (1) Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China |
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| Abstract: | Hydrogeochemistry data were utilized to understand origin, distribution, and geochemical evolution of the high-fluoride groundwater
in Taiyuan basin, China. In the study area, the spatial distribution of the high-fluoride groundwater are strictly controlled
by the host rock and geomorphic conditions. Three types of groundwater with the F− concentration of <1.5 mg/L, 1.5–2 mg/L and >2 mg/L are located in the areas bordering the limestone zones, in the areas bordering
the sandstone of Permian and Carboniferous, and in the depressions of the central parts of the basin, respectively. The high-fluoride
groundwater mostly have the high values of TDS, and its values of pH range from 7.2 to 8.8. The most common water types of
the high-fluoride groundwater are Na·Ca–HCO3 and Na·Mg–HCO3. The geochemical mode reveals that the dissolution of the fluorine-containing minerals and the evaporation effect of the
shallow groundwater control the evolution of high F− concentration in Taiyuan basin. |
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