RT Journal Article
T1 Geocronologia 207Pb/206Pb en cristal único de circón y Rb-Sr del plutón de la Cabrera (Sierra del Guadarrama)
T1 Single zircon 207Pb/206Pb and Rb-Sr Geochronology of La Cabrera Pluton (Sierra del Guadarrama, Spain)
A1 Casquet Martín, César
A1 Montero, P.
A1 Galindo, Carmen
A1 Bea, F.
A1 Lozano, R.
AB A Pb-Pb crystallization age of 302 ±3 Ma was found for the La Cabrera granite by the single zircon Pb-evaporation technique. Moreover the whole rock Rb-Sr isotope systematics provided an errochrone of 303 ± 24 Ma (I.R. = 0.709275; MSWD — 23.4). This age is Upper Carboniferous and is close to the end of a stage of regional N-S extension subsequent to the climax of Variscan regional metamorphism. The high MSWD of the Rb-Sr systematics might foe attributed to either an ubiquitous weak pervasive hydrothermal alteration or to the absence of initial isotopic equilibrium throughout the pluton. The second possibility is favored from Nd isotope composition considerations
PB Sociedad Geológica de España
YR 2003
FD 2003
LK http://hdl.handle.net/10272/8999
UL http://hdl.handle.net/10272/8999
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 29 may 2026