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Processus de formation et relations spatio-temporelles des minéralisations à or et argent en contexte volcanique Précambrien (Jbel Saghro, Anti-Atlas, Maroc). Implications sur les relations déformation-magmatisme-volcanisme-hydrothermalisme

Abstract : Within the Jbel Saghro (Eastern Anti-Atlas, Morocco), two major tectono-magmatic events are recognized and linked with hydrothermal features. The middle Neoproterozoic sedimentary basement rocks were affected by a weak ductile deformation that results from a ca. NW-SE shortening direction, responsible for the formation of kilometric-scale folded structures, axial plane foliation, N070-090°E dextral shear-zones, localized thrusts and syn-kinematic granodiorite plutons emplacement. The second event is characterized by the development of, widespread upper Neoproterozoic volcanic and volcaniclastic rocks, related magmatic features and associated Au-Ag deposits. Within the Kelâa M'Gouna district, this event can be linked to the eruptive history and petrologic evolution of an ash-flow caldera. Although each one presents specific features, all deposits of the studied area are controlled by the same structural setting, a ca. WNW-ESE trending shortening direction that also control the emplacement of volcano-magmatic structures.
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https://tel.archives-ouvertes.fr/tel-00008937
Contributor : Nathalie Pothier <>
Submitted on : Wednesday, September 14, 2005 - 8:46:47 AM
Last modification on : Friday, June 12, 2020 - 3:22:08 PM
Long-term archiving on: : Friday, November 25, 2016 - 9:26:21 AM

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  • HAL Id : tel-00008937, version 3

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Johann Tuduri. Processus de formation et relations spatio-temporelles des minéralisations à or et argent en contexte volcanique Précambrien (Jbel Saghro, Anti-Atlas, Maroc). Implications sur les relations déformation-magmatisme-volcanisme-hydrothermalisme. Géologie appliquée. Université d'Orléans, 2005. Français. ⟨tel-00008937v3⟩

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