Sedimentation et volcanisme synsédimentaire de la série de base de l'adoudounien infra-cambrien à travers deux exemples de l'Anti-Atlas du Maroc |
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Authors: | Ab Algouti Ah Algouti B Chbani M Zaim |
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Affiliation: | a Département de Géologie, UFR ‘Dynamique des Bassins: stratigraphie intégrée et Géoprospects’, Université Cadi Ayyad, Faculté des Sciences-Semlalia, BP 2390, Marrakech 40000, Maroc;b Laboratoire de Pétrographie, Département de Géologie, Faculté des Sciences-Semlalia Marrakech, Maroc |
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Abstract: | The Adoudounian Basal Series within the western part of the Moroccan Anti-Atlas Mountains was deposited in a varying palæogeographical setting. The first deposits of volcaniclastic and carbonate sediments accumulated in small shallow basins under tectonic control. Then, sedimentation became siliciclastic and volcano-detrital with coastal and deltaic sedimentation in the western area and lagoon-lacustrine in the eastern area. Synsedimentary alkaline volcanism, associated with normal faulting, indicates a within-plate extensional tectonic regime related to rifting, which affected the northern margin of the West African Craton, during Late Neoproterozoic-Early Cambrian times. |
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