High temperature geothermal resources of crustal fault zones: a dedicated approach

The amount of heat directly usable by geothermal technology depends on the fluid flow rate and its long-term reachable temperature by drilling (at the lower depth as possible to be more economic). The subsequent questions are: (1) what is the crustal pathway for the flow of fluids?, (2) How and why this pathway evolves ? and (3) which heat transfer processes is along this pathway? TLS-GEOTHERMICS has built a workflow to explore these problematics and minimize the drilling risks associated to geothermal exploration and maximize the potential natural targets. We demonstrate this one on a natural cases in the French Massif Central using a synthesis of existing knowledge and by acquisition of new data using geological (structural and geodynamics approach) and geophysical methods (MT, Ambiant Noise Tomography, Gravimetry).