Fig. 9From: The layered model of the Copahue geothermal reservoir, ArgentinaAvailable production data from the exploratory wells at Copahue. a Timeline of the production data from Sierra et al. (1992) for two wells. The interpretation based on water isotopes is shown in brackets. X = steam molar fraction. b FT-HSH diagram (D’Amore and Truesdell 1985) from fluid discharge during different stages of production tests that shows a variable vapor–liquid fraction (Panarello 2002)Back to article page