Tectono-Sedimentary and magmatic evolution of the Upper Visean basins of Azrou-Khenifra and eastern Jebilet (Moroccan Meseta)

During Upper Visean times, the eastern mesetian basins of eastern Jebilet and Azrou Khenifra show great tectono-sedimentary and magmatic evolution similarities. Their deposits record large instabilities and disorganisation with huge thickness and lithological variations, related to a syn sedimentary tectonic context. At the same time, tilted block tectonics affect the basement of these basins, controlled by bordering transfer faults. Basic dominant magmatic bodies set up in these basins. Their continental alkaline chemical characteristics are consistent with the regional geo dynamic context in this area. Initiated along the transitional zone between eastern and western Meseta, the Azrou-Khenifra and Jebilet basins correspond to intra continental throws, initiated on and controlled by major strike-slip faults. Their evolution is most likely earlier in time and of a weak opening rate than the neighboring western Meseta basins. (Author) 69 refs