Estudio de las deformaciones en algunos diques del complejo filoniano Tardi-Hercínico de la Zona Sur del batolito del Montnegre (Cordillera Litoral Costero-Catalana)

Résumé

In this paper, we study the deformation of some dikes within the Tardi-Hereynian dike-complex of the southwestern Montnegre batholith ("Cordillera Litoral Costero Catalana"). These dikes, which are mainly pre-Triasic in age, display different compositions and trends (dominantly NE-SW), and they were emplaced in a calc-alkaline granitic batholith, post-tectonic (with respect to the Hercynian cycle) (ENRIQUE, P., 1978; ENRIQUE, P., 1983; JUUVERT, M. & MARTINEZ, F. J., 1983; ENRIQUE, P. & DEBON, F. 1987; ENRIQUE, P. et al, 1987; SERRA, A. & ENRIQUE, P. 1987). In the borders of the dikes, we may observe intrusion-related deformational features, similar to the ones described in the dike-complex of the Spanish Central System (UBANELL, A. G. & DOBLAS, M. 1987a; DOBLAS, M. et al., 1987; DOBLAS M. et al., in press). During Tardi-Hercynian times the area underwent extensional tectonics resulting in the emplacement of this linear-shaped dike-complex (NE-SW). Finally, we will include this Tardi-Hercynian extensional event within a generalized model, comparing the characteristics of the Catalonian province, with the Spanish Central System and the Pyrenees.