| Citation: | CAO Yuanyuan,HU Xinjun,NI Ping,et al. Genesis mechanism of geothermal water in Yinchuan Basin: Constraints from hydrochemistry and isotopes[J]. Bulletin of Geological Science and Technology,2026,45(3):288-303 doi: 10.19509/j.cnki.dzkq.tb20250032 |
Geothermal resources have advantages such as renewability, high energy utilization efficiency, and energy conservation and emission reduction. As an important renewable energy for promoting energy transition and achieving the "double carbon" goals, although the Yinchuan Basin is rich in geothermal reserves, the genesis of its geothermal water remains unclear due to the lack of systematic hydrogeochemical and isotopic research, and their development lacks scientific planning and unified management, which not only slows down the development process of geothermal resources but also seriously hinders the green rapid local economic development.
This study focused on water samples from typical geothermal wells in the Yinchuan Basin and divided them into western, central, and eastern regions according to their locations. Combined with the regional geological structure background, by analyzing and testing the hydrochemical and isotopic characteristics of geothermal water and cold groundwater, the study investigated the geochemical origin, runoff circulation processes, and heat sources of geothermal water in the study area, and analyzed the genesis mechanism of the geothermal system.
The results showed that the main hydrochemical types of geothermal water in this study area were Cl-Na type and Cl·SO4-Na type. Hydrogen and oxygen isotopes indicated that the geothermal water was mainly recharged by atmospheric precipitation, and the recharge elevation ranged from
This study clarifies the key hydrogeochemical characteristics and genesis mechanism of geothermal resources in the Yinchuan Basin, and establishes a conceptual model of the geothermal system genesis, providing an important theoretical and practical basis for the subsequent scientific and rational development and utilization of geothermal resources and promoting green high-quality economic development in the region.
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