Geoquímica de los basaltos toleíticos triásicos del Macizo de Beni Snassen (NE de Marruecos)

  1. S. Ratbi
  2. J. Bastida
  3. M. López-Buendía
  4. M. Lago
  5. C. Galé
  6. E. Arranz
Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Any de publicació: 2000

Títol de l'exemplar: V Congreso Geológico de España (Alicante, 10-14 julio 2000)

Número: 1

Pàgines: 293-298

Tipus: Article

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Altres publicacions en: Geotemas (Madrid)

Resum

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.

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