Precambrian accretionary tectonics in the Bou Azzer-El Graara region, Anti-Atlas, Morocco

Origin of magnetite veins in serpentinite from the Late Proterozoic Bou-Azzer ophiolite, Anti-Atlas, Morocco: An implication for mobility of iron during serpentinization

“…1). It is situated along the Major Anti-Atlas Fault (Choubert, 1947), which makes the contact between the two major structural units: the West African Eburnian craton (1900( -1650 to the southwest and the Pan-African orogenic belt to the northeast (Saquaque et al, 1989;Ennih and Liégeois, 2001). The ophiolite complex of Bou-Azzer forms an elongate belt trending WNW-ESE and covers about 300 km 2 .…”

Transpressional tectonics in the Marrakech High Atlas: Insight by the geomorphic evolution of drainage basins

“…Consequently, this doming, centered above the Siroua massif (Missenard et al, 2006), is contemporaneous with a Pliocene-Pleistocene volcanic activity (Berrahma and Hernandez, 1985) and, combined with the shortening it could be responsible of the elevation for the basement up to 2400 m high, capped by volcanic plugs reaching 3200 m high. This basement, showing a predominance of Precambrian (PII) foliated metavolcanic rocks with the volcano-clastic series of Ouarzazate (Saquaque et al, 1989), makes up an uplifted rigid block. It can be considered as an indenter that contributed to accentuate the bending and the pop-up of the restraining stepover zone forming the Ouzzelarh Massif during the recent shortening.…”

Tectonics of the Anti-Atlas of Morocco

“…The final assembly of most of the African continental crust takes place during the Panafrican orogeny, lasting roughly from 700 to 600 Ma [46]. Remnants of a Panafrican suture zone are present as a dismembered ophiolite series in the Bou Azzer inlier of the central Anti-Atlas [45,55,81,96] -a structure recently reinterpreted as an aulacogen within the WAC [32]. Elsewhere in the Anti-Atlas, the Panafrican event left a more subtle imprint in the form of strike-slip shear zones and thrusts [43].…”