RT Journal Article T1 Aplicación del método electromagnético de inducción ligera para el análisis de la permeabilidad en medios fracturados (granito de “El Berrocal”, Sistema Central Español) A1 Vicente, Raquel de A1 Muñoz Martín, Alfonso A1 Olaiz Campos, Antonio José A1 Antón López, Loreto A1 Vicente Muñoz, Gerardo De AB Fracture characterization in granites has been an important subject of study during these last years, by means of geological-structural cartography, hydrogeology and geochemical analysis. All these works have been carried out to investigate the hydromechanics and permeability in low-permeability rocks. In this study we apply a surface geophysical method in order to characterize the permeability of the fault zones affecting “El Berrocal” granite (Central System, Spain). The low-induction electromagnetic method (EM) gives us the apparent resistivity values of the rocks at a maximum depth, allowing us to differentiate between soil / altered rock from fresh granites. As the apparent resistivity depends on the granite alteration and/or the water content, this parameter allows to estimate the relative permeability of different fracture zones. The obtained results show that the high-permeability fractures are those that are larger ones which were active during Alpine deformation (Eocene-present). PB Sociedad Geológica de España SN 0213-683X YR 2009 FD 2009 LK https://hdl.handle.net/20.500.14352/49323 UL https://hdl.handle.net/20.500.14352/49323 LA spa DS Docta Complutense RD 10 abr 2025