The B26 mineralization is composed of a stacking of massive polymetallic and semi-massive polymetallic sulfides lenses extending over a kilometric strike length within a strongly dipping basin filled by felsic volcanism products. Sulfide-rich mineralization is mostly hosted in rhyolite and associated tuffs. Two main types of mineralization characterize the B26 Deposit. The northern part of the mineralized system is characterized by chalcopyrite veins and veinlets hosted in sericitized and chloritized rhyolite. The southern portion of the system contains mostly disseminated to massive sphalerite, pyrite and galena mineralization, hosted in a dome of massive rhyolite. The zones are stacked in a sub-parallel pattern, oriented generally east-west, and dip 87° to the south.