Le volcanisme cambrien du Maroc central : implications géodynamiques |
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Authors: | Houssa Ouali Bernard Briand Jean-Luc Bouchardon Paul Capiez |
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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 |
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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). |
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Keywords: | paléovolcanisme tholéiites continentales Cambrien Bou-Acila Maroc central palaeovolcanism continental tholeiite Cambrian Bou-Acila central Morocco |
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