RT Journal Article T1 Actividad paleo-hidrotermal episódica en la Sierra de Guadarrama (Sistema Central Español): nuevas edades K-Ar y correlación tectónica con la Cordillera Ibérica T1 Episodic palaeo-hydrothermal activity in the Sierra de Guadarrama (Spanish Central System): new K-Ar ages and tectonic correlation with the Iberian chain A1 Galindo, Carmen A1 Casquet Martín, César A1 Tornos, Fernando AB Episodic hydrothermal alterations in the Sierra de Guadarrama took place between ca. 300 Ma and10 Ma. New K-Ar ages for hydrothermal minerals have been obtained that along with previous data allowto better constrain the late- to post-Variscan history of tectono-hydrothermal activity. This activity canfurther be correlated with Alpine tectonic events in central Iberia recorded in Permian to Cainozoicsedimentary basins. Dating of hydrothermal events in the basement is thus a useful tool to better constrainthe chronology of tectono-sedimentary events in the cover PB Sociedad Geológica de España YR 2010 FD 2010 LK http://hdl.handle.net/10272/17899 UL http://hdl.handle.net/10272/17899 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026