Surface discrepant manifestation, regime and controlling mechanisms of hydro-thermal behaviors in a typical high-temperature geothermal system on Tibetan Plateau

作者：Yong Xiao, Yuqing Zhang, Jie Wang, Gongxi Liu, Peng Zhou, Huizhu Chen, Wenxu Hu, Liwei Wang, Limao Qin, Lianhe Zhou, P. Ma, Qiong Pu · 发表于：Journal of Hydrology Regional Studies · 年份：2025 · DOI：10.1016/j.ejrh.2025.102725 · 被引用次数：3 · 研究领域：Geothermal Energy Systems and Applications、Hydrocarbon exploration and reservoir analysis、CO2 Sequestration and Geologic Interactions

Study region Quzhuomu Geothermal Valley, a typical high-temperature geothermal valley on Tibetan Plateau. Study focus This research focuses on the surface differential manifestations of hydro-thermal activities in high-temperature geothermal fields and their controlling mechanisms. New hydrological insights for the region Hydro-thermal manifestations within the valley exhibit significant spatial variations in water temperature, hydrochemical and isotopic compositions, as well as the travertine deposition. Geothermal water presents a sequential increase in outcropping average temperatures, from 53.5℃ upstream to 60.5℃ midstream, and finally to 80.8℃ downstream. Geothermal waters hydrochemical facies evolve from SO₄·HCO₃·Cl-Na·Ca type to Cl·HCO₃-Na type along the valley, accompanied by increasing travertine deposition area. The geothermal system receives water recharge from the Kongbu Mountain, which is heated by the magma chamber (reserve temperature 130–180℃). The heated waters upwell through different faults, resulting in varying circulation depths, residence times, and extents of water-rock interaction for the geothermal waters, and encounter different degrees of cold-water mixing (from 71 % upstream to 55 % downstream). These factors collectively lead to distinct hydro-thermal manifestations of the geothermal system at the ground surface. An integrated conceptual model was established to reveal the distinct hydro-thermal manifestations at ground surface within a geothermal...