Hole DSB-12 496.27m to 503.44m. Deformed moderately alunitized dacite locally interbedded with minor sandstone, showing flow banding and cut by intrusive breccia composed of dacite clasts cemented with tourmaline matrix (partially replaced by sulphides as pyrite, sphalerite and, silver sulphosalts). There are two vein breccias (20/30 cm in width) along with pyrite, sphalerite, and alunite-bearing cross-cutting veinlets and disseminated pyrite (3%).
Hole DSB-12 496.27m to 503.44m. Deformed moderately alunitized dacite locally interbedded with minor sandstone, showing flow banding and cut by intrusive breccia composed of dacite clasts cemented with tourmaline matrix (partially replaced by sulphides as pyrite, sphalerite and, silver sulphosalts). There are two vein breccias (20/30 cm in width) along with pyrite, sphalerite, and alunite-bearing cross-cutting veinlets and disseminated pyrite (3%).