Fault-controlled permeability and fluid flow in low-porosity crystalline rocks: an example from naturally fractured geothermal systems in the Southern Andes

Gloria Arancibia1,2, Tomas Roquer1,2, Josefa Sepúlveda1,3, Eugenio A. Veloso3,4, Diego Morata5,6 and Julie V Rowland7, (1)Andean Geothermal Center of Excellence (CEGA), Santiago, Chile, (2)Pontificia Universidad Católica de Chile, Department of Structural and Geothecnical Engineering, Santiago, Chile, (3)Pontificia Universidad Católica de Chile, Departamento de Ingeniería Estructural y Geotécnica, Santiago, Chile, (4)Pontifical Catholic University of Chile, Departamento de Ingeniería Estructural y Geotécnica, Santiago, Chile, (5)University of Chile, Department of Geology and Andean Geothermal Center of Excellence (CEGA), Santiago, Chile, (6)Universidad de Chile, Departamento de Geología, Santiago, Chile, (7)University of Auckland, School of Environment, Auckland, New Zealand