• The Namrana deposit is located within the Malian portion of the Kenieba-Kedougou window, a major Palaeoproterozoic inlier along the northeast margin of the Kenema-Man shield. The Birimian components of the window can be interpreted as a collage of at least two N-S trending terrains. The Kofi Formation is significantly younger and intruded by calc-alkaline batholiths dated at 2.0 - 2.05 Ga. Metamorphic grade attains green schist facies, with amphibolites grades developed locally near major intrusions.