[en] The comparative study of different uranium deposits from the eastern border of the inlier of Mounana reveals that the four deposits at present known, i.e. those of Boyindzi, Mounana, Oklo and Okelobondo, are situated on the same flexural zone affected by sliding. The two first, at the contact of the basement, are subject to break deformations, while the two others are implicated in extensive flexible structures resulting from the same sliding tectonics. (author)