RT Journal Article T1 Análisis de la fracturación asociada a las alteraciones hidrotermales de tipo Greisen y Episienita en la Sierra del Guadarrama A1 González Casado, J. M. A1 Casquet Martín, César A1 Caballero, J. M. A1 Galindo, Carmen A1 Quílez, E. A1 Tornos, Fernando AB Several episodes of hydrothermal activity have recently been dated in the Sierra del Guadarrama (Caballero et ai, 1992a). Stress analysis based upon the fault sets associated with 300-290 M.a. (Wlodes and greisens) and 274±6M.a. (episyenites) events, have been carried out. The first peak is related to a transtensional strike-slip tectonic regime, with S E-NW compression. The second is a ssociated to an extensional regime, with NE-SW and E-Wextension PB Sociedad Geológica de España YR 1992 FD 1992 LK http://hdl.handle.net/10272/14066 UL http://hdl.handle.net/10272/14066 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026