Una nueva interpretación sobre las relaciones entre el emplazamiento de granitoides y el metamorfismo regional hercinianos en el Pirineo oriental

Abstract

The Hercynian outcrops of the Cap de Creus (Eastern Pyrenees) allow to relate the intrusion of calcalkaline m agm as to low-pressure and high-temperature regional metamorphism. The coexistence o f basic and intermediate magmas with anatectic migmatites, and a well-developed field of pegmatitic bodies inside the sillimanite zone, suggest that hot mantle or deep crustal-derived magmas ascending to the upper levels of the crust were the heat source for such high-thermal gradient regional metamorphism. Shallow-level emplaced batholiths and andesitic volcanism in the Hercynian Pyrenees might have been fed by this magmas, mixed in several degrees with the anatectic melts