The Birimian basement of Côte d’Ivoire is characterized by a complex tectono-metamorphic history, yet the structural evolution of the Kan granito-gneissic complex (KGC) and the Comoé metasediments (CMS) remains insufficiently documented. This study combines teleanalytic mapping with field-based structural measurements to reconstruct the tectonic evolution of these formations. Lineament analysis highlights four principal orientations (E-W, N-S, NE-SW, NW-SE), which correspond to successive ductile and brittle deformation phases. In the metasediments, three phases (D1–D3) were identified: D1 marked by schistosity and shear planes, D2 by crenulation schistosity linked to NNE-SSW compression, and D3 by late brittle faults including the Dimbokro shear zone. In the gneiss formations, four phases (Dn–Dn+3) were recorded, with Dn+1 characterized by foliation, shear planes, and folds, Dn+2 by open folds and dextral shear zones, and Dn+3 by brittle strike-slip faults and conjugate joints. These structures reveal a polyphased tectogenesis dominated by transpressive and compressive regimes. The Brobo shear zone and the Dimbokro fault emerge as major tectonic features controlling regional deformation. The results not only clarify the tectonic evolution of the Ivorian Birimian basement but also provide new insights into the geodynamic framework of the West African Craton, with implications for mineral exploration and regional tectonic correlations.
