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

Figure 10

Conceptual model of hydrothermal circulations in the Têt Valley. Meteoric water infiltrates on the Canigou-Carança Range, using background or fault-related fractures, to warm in one or more shallow hot reservoirs, existing because of the influence of the Têt fault on isotherms. They use fractures in the Têt fault damage zone as pathway to the surface, preferentially at the intersection between the Têt fault damage zone with subsidiary brittle faults or ductile faults. Gneiss-metasediments contacts and/or impermeable cataclasites in the core zone restrict fluids in the Têt fault footwall. The Py brittle fault, juxtaposing gneiss in its two compartments, localize no hot springs, and maybe compartmentalizes fluids at shallow depths.