Fig. 8From: On the geothermal potential of crustal fault zones: a case study from the Pontgibaud area (French Massif Central, France)Microscopic observations of thin-section from the hydrothermalized zone. a Anatexite rich in veins. b Fractured anatexite. c Mineralized breach. d Porous breach. (Po) Porosity. (Qz) Quartz. (Void) Void. (Fr) Fracture. (Tur) Turmaline. (Ox) Oxide. (Sr) Sericites. (Kfs) Potassic feldsparBack to article page