2009
DOI: 10.3406/edyte.2009.1097
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Les paléo-karsts hydrothermaux à remplissage de sulfures du district de Touissit-Bou Beker (Maroc nord oriental) : origine(s) et implication(s)

Abstract: Les minéralisations Pb-Zn de type Mississippi Valley du district de Touissit-Bou Beker (Maroc Nord oriental) se présentent sous forme de remplissage d'un réseau interconnecté de paléo-karsts hydrothermaux et de brèches d'effondrement. Les études géologiques montrent que les dolomies encaissantes ont subi les effets de trois phases de dissolution, dont une phase majeure reliée à la circulation des fluides minéralisateurs. Les structures de dissolution qui en résultent se distinguent les unes des autres aussi bi… Show more

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“…1B) (Hudson-Edwards et al, 2015). The Touissit-Bou Beker district is the Mississippi Valley-type deposits, it is embedded in a thick sequence of dolomitized rocks by hydrothermal activities around 170 Ma, belonging to the Jurassic carbonate platform (Wadjinny, 1998, Bouabdellah, 2009, Marcoux et al, 2021. It comprises a Paleozoic basement consisting of metamorphites, granodiorites and rhyodacites and a tabular Mesocenozoic cover with calcareous Jurassic facies, a shallow calcarodolomitic layer of Aalenian-Bajocian age (Hauts Plateaux Slab), and by marly and detrital sediments of the Upper Jurassic (Fig.…”
Section: Introductionmentioning
confidence: 99%
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“…1B) (Hudson-Edwards et al, 2015). The Touissit-Bou Beker district is the Mississippi Valley-type deposits, it is embedded in a thick sequence of dolomitized rocks by hydrothermal activities around 170 Ma, belonging to the Jurassic carbonate platform (Wadjinny, 1998, Bouabdellah, 2009, Marcoux et al, 2021. It comprises a Paleozoic basement consisting of metamorphites, granodiorites and rhyodacites and a tabular Mesocenozoic cover with calcareous Jurassic facies, a shallow calcarodolomitic layer of Aalenian-Bajocian age (Hauts Plateaux Slab), and by marly and detrital sediments of the Upper Jurassic (Fig.…”
Section: Introductionmentioning
confidence: 99%
“…The gangue ore is mainly dolomite (Weiss, 1985). The clays present in the ore of Beddiane (Touissit) are kaolinite and illite (Bouabdellah, 2009).…”
Section: Introductionmentioning
confidence: 99%