Disseminated Au-Ag mineralization at Montauban was interpreted by Bernier et al. (1987) to be part of a metamorphosed siliceous exhalite over imposing itself on the previous base metal mineralization already present in the area.

The base metal mineralization found in Montauban is massive to semi-massive sulphides, coarsely grained and mostly composed of sphalerite, galena, pyrrhotite, pyrite and chalcopyrite with minor quantities of cubanite, tetrahedrite and molybdenite (Stamatelopoulou-Seumour et al. (1984)).

The gold bearing mineralization is marginal compared to the massive sulphide one, it consists of disseminated pyrrhotite, galena, sphalerite and chalcopyrite with a large range of minor sulphides, sulphosalts and native minerals (Bernier et al. (1987)).