Research on Groundwater Chemistry and Environmental Isotope in Liyazhuang Mining Area
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Abstract:
The groundwater chemistry of the major aquifers was analyzed and the environmental isotope method was used to study the water source in the Liyazhuang mining area based on the hydrogeological investigation results. The groundwater chemistry results showed that (1) there is a difference in groundwater quality between different aquifers in the mining area. The karst fissure water quality in the Taiyuan formation of Carboniferous system has only a single type, and it has lower concentration of SO42- and higher concentration of Na+ compared with the Permian fissure water; (2) the karst water quality in the Fengfeng formation of Ordovician system is relatively complex with the obvious horizontal zoning characteristics; and (3) the type of water quality and ion concentrations in the upper Majiagou formation of Ordovician system have significant differences from those in the Fengfeng formation. The environmental isotope analysis results showed that δD and δ18O deviate far away from the local precipitation line, which indicated that precipitation does not play an important role in recharging the karst fissure water in the Taiyuan formation and karst water in the Ordovician system. Instead, both types of water receive water from the ancient water and recent infiltration water and mixture of both based on the analysis of Tritium concentration.
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