The Açdif Gold-Bearing Shear Zone (Zenaga Inlier, Central Anti-Atlas, Morocco): New Petro-Structural and Geochemical Data

The Açdif gold deposit is located in the Zenaga Inlier (central Anti-Atlas), approximately 120 km southwest of city Ouarzazate. It hosts mineralization associated with a shear zone affecting metamorphic and magmatic formations Eburnean basement. mainly consists alternating micaschists, augen gneisses, orthogneiss. These crystalline rock assemblages are intruded by variety granitoids. Azguemerzi granitoids, which locally affected deformation. Subsequently, these facies intersected swarm mafic dykes, show rocks ranging from microgabbro-dolerite to quartz diorite. Detailed mapping, petro-mineralogical investigations, geochemistry major trace elements intrusions suggests following: (i) for granodiorite (deposited before basic dykes), calc-alkaline affinity, chemical signature similar syn-collisional context; (ii) contemporaneous emplacement an evolutionary process controlled fractional crystallization same magma continental tholeiites, whose composition comparable that enriched MORBs (EMORBs). tholeiites related distensive tectonic context would have inlier prior Pan-African orogeny.