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Le volcanisme cambrien du Maroc central : implications géodynamiques
Authors:Houssa Ouali  Bernard Briand  Jean-Luc Bouchardon  Paul Capiez
Institution:1. Université Moullay-Isma??l, département de géologie, groupe GeoCube, BP 4010, Beni-M''Hamed, Meknès, Maroc;2. Laboratoire de dynamique de la lithosphère, université Lyon-1, 27–43, bd du 11-Novembre-1918, 69622 Villeurbanne cedex, France;3. École des mines de Saint-Étienne, 158bis, cours Faurriel, 42023 Saint-Etienne, France
Abstract:In southeastern Central Morocco, the Bou-Acila volcanic complex is considered of Cambrian age. In spite of low-grade metamorphic effect, initial volcanic texture and mineralogy can be recognized and volcanic rocks are dominated by dolerites and porphyric dolerites. The initial mineralogy is composed of plagioclases, pyroxenes and dark minerals. A secondary mineral assemblage is composed of albite, epidote, chlorite and calcite. According to their immobile elements compositions, the southeastern central Morocco metavolcanites are of within-plate continental tholeiites. This volcanism and those recognized in many other areas in Morocco confirm a Cambrian extensive episode within the Gondwana supercontinent. To cite this article: H. Ouali et al., C. R. Geoscience 335 (2003).To cite this article: H. Ouali et al., C. R. Geoscience 335 (2003).
Keywords:paléovolcanisme  tholéiites continentales  Cambrien  Bou-Acila  Maroc central  palaeovolcanism  continental tholeiite  Cambrian  Bou-Acila  central Morocco
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