Fault-Related Controls on Upward Hydrothermal Flow: An Integrated Geological Study of the Têt Fault System, Eastern Pyrénées (France)

Figure 9

Preliminary numerical model of the Têt hydrothermal fluid circulations, performed with COMSOL Multiphysics™ software. Bedrock (gneiss) permeability = 10−16 m²; core zone permeability = 10−18 m². Damage zone permeability = 10−14 m². The large-scale cross-section represents thermal and velocity fields for the Canigou-Carança Range at Thues-les-Bains. Isotherms rising around the Têt fault are observed (a). (b) Zoom on the fault zone in (a) with spatial evolution of Darcy velocity (black and white color scale) and isotherms (yellow to orange lines). High velocities concentrate in the damage zone, at the interface with the core zone. Fluids with temperatures exceeding 50°C reach the surface.