Fig. 5From: On the geothermal potential of crustal fault zones: a case study from the Pontgibaud area (French Massif Central, France)Permeability imposed in the numerical models of the parametric study. The alpha angle corresponds to the dip of the fault zone (here α = 90°). The permeability of the basement and fault will decrease with depth according to Eq. 6 (Garibaldi et al. 2010). Within the fault zone, permeability will also vary laterally (Eq. 7) to match field observationsBack to article page