Geoquímica de los basaltos toleíticos triásicos del Macizo de Beni Snassen (NE de Marruecos)
- S. Ratbi
- J. Bastida
- M. López-Buendía
- M. Lago
- C. Galé
- E. Arranz
ISSN: 1576-5172
Année de publication: 2000
Titre de la publication: V Congreso Geológico de España (Alicante, 10-14 julio 2000)
Número: 1
Pages: 293-298
Type: Article
D'autres publications dans: Geotemas (Madrid)
Résumé
Two basaltic units, with interbedded Ladinian-Carnian marine limestones, were emplaced into Triassic materials of the Beni Snassen Massif (NE Morocco). Mineral (Ol+Cpx+Pl+Mt) and geochemical compositions o f these basalts evidence its tholeiitic affinity and cogenetism, as well as differentiation by fractional crystallization. These basalts were emplaced in a shallow submarine environment, and the extrusion seems to be related to two fracture families, trending N70-N90 and N l 35-N160 respectively. These fractures display a restricted regional development, suggesting an aborted rifting event prior to Liassic sedimentation.