Implicaciones de los enclaves máficos microgranulares en la petrogénesis de los granitoides calcoalcalinos hercínicos
- Castro Dorado, Antonio
- Moreno-Ventas Bravo, Ignacio
- Rosa Díaz, Jesús de la
ISSN: 0213-683X
Year of publication: 1990
Issue: 8
Pages: 13-16
Type: Article
More publications in: Geogaceta
Abstract
Hercynian calc-alkaline granitoids are characterized by the presence of microgranular magmatic enclaves of tonalitic to diorite composition. Recent studies of these enclaves and host granitoids reveal that they were generated from disruption of synplutonic dikes of hybrid tonalites. Two stages of hybridization can be distinguished: (1) Injection mixing giving to a hybrid tonalite from a mafic magma, and (2) convective mixing, giving rise to homogeneous hybrid rocks of calc-alkaline composition.