断控型温泉形成的主控因素——来自COMSOL Multiphysics数值模拟的约束OA

Hot springs represent a common mechanism for external heat dissipation from the deep Earth,often associated with fault activity.Fault-controlled hot springs are particularly important in the development of geothermal resources.Therefore,a comprehensive understanding of the relationship between fault zones and hot springs is crucial for effective geothermal development and utilization.Despite this,there remains a lack of systematic research on how the characteristics of fault zones(such as width,permeability,and dip angle)affect the formation of hot springs.This study employs a three-dimensional thermodynamics-hydrodynamics coupled numerical model to investigate the influence of fault width,permeability,and dip angle on hot spring formation and characteristics,under fixed terrain,stratigraphy,hydrological conditions,and regional thermal background.Based on above,the study further explores the effects of intersecting fault zones on groundwater circulation.The results indicate that along a fault,high-altitude sections exhibit negative thermal anomalies due to precipitation and surface water infiltration,while low-altitude sections are characterized by positive thermal anomalies and hot spring formation.These suggest that hot spring formation is influenced not only by the fault zone itself but also by the surrounding terrain conditions.The permeability and dip angle of the fault zone show a positive correlation with the formation,flow rate,and temperature of hot springs,with the dip angle having the most pronounced effect on temperature.Additionally,as the fault width increases,hot spring temperatures initially rise before eventually decreasing.In the context of intersecting fault zones,hot springs are predominantly formed in the low-altitude region of each intersecting fault,with intersections potentially generating hot springs depending on the specific characteristics of the intersecting faults.