Based on the geothermal water hydrochemical data of karst geothermal fields of Wuhan urban agglomeration, the authors summarized the hydrochemical type of karst hot mineral water, analyzed the variation characteristics of main components of karst hot mineral water with temperature, studied the relationship between the degree and time of water-rock action, and analyzed the hydrochemical processes of the main ions in hot water. The results show that the content of main components in hot water is controlled by temperature and water-rock interaction process, the total dissolved solids content increases with the increase of water-rock action time. As the total dissolved solids content increases, the water-rock interaction was gradually transformed from carbonate dissolution to sulfate dissolution, at high total dissolved solids, the dissolution of salt rocks is enhanced. the Langkou geothermal field, the Wuhongshan geothermal field and the Shewushan geothermal field belong to the same water flow system, the Tangchi geothermal field and the Makou geothermal well belong to the same water flow system, and other geothermal fields belong to separated water flow systems.
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Jun-Qiang NIU, Wei FAN, Kun GUO. A study of chemical characteristics and water-rock interaction of karstic geothermal reservoir in Wuhan city circle. Geophysical and Geochemical Exploration, 2019, 43(4): 741-748.
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