Located 30 km southeast of the Tagragra d’Akka inlier, Jbel Addana forms part of the Ordovician Jbel Bani chain within the Paleozoic cover of the Moroccan Anti-Atlas. The area is composed of weakly metamorphosed Upper Ordovician detrital units, mainly quartzites, shales, and sandstones. Metallogenically, it corresponds to a mining district comprising several mineralized zones, among which the Central Plateau represents the largest deposit. Lithostratigraphically, the sequence includes interbedded sandstones, shales, and quartzites of the Rouid-Aïssa Formation, overlain by the Upper Ktaoua shales and capped by Second Bani quartzites. Geological mapping focused on lithostratigraphic architecture and structural features controlling mineralization. Petrographic, metallographic, and Scanning Electron Microscopy (SEM) analyses were conducted to identify mineral assemblages and alteration stages. Electron-microprobe analyses were performed to determine the chemical composition of ore bodies. Structural data were processed using Win-Tensor software to reconstruct the paleostress responsible for fracture formation and ore emplacement.

Mapping revealed that competent units of the Rouid-Aïssa Formation preferentially host mineralization. Ore bodies occur as N110°E–N130°E vertical subparallel veins with regular spacing, carrying lead and copper mineralization. Metallographic and Scanning Electron Microscopy (SEM) observations indicate two main paragenetic stages: (1) a hydrothermal stage marked by quartz, galena, chalcocite, stromeyerite calcite, and siderite; and (2) a supergene stage characterized by anglesite, cerussite, covellite, malachite, smithsonite, and iron oxides. Microprobe analyses show that galena contains minor gold and bismuth (88.77 wt.% Pb, 12.48 wt.% S, 0.76 wt.% Bi, 0.72 wt.% Au) with a structural formula of Pb1.04Bi0.01Au0.01S0.94.

Structural analysis indicates that mineralization is hosted by a dense network of regularly spaced joints. Win-Tensor results show that these fractures were opened under a sub-vertical σ1 stress controlled by the Hercynian uplift of Precambrian basement blocks. This stress regime promoted fracture opening along the anticline hinge, enabling hydrothermal fluid circulation and ore deposition.