MINERALIZATION

The emerald-bearing schists strike NE-SW over a distance of 200 km. The native rocks are a suite of Precambrina phyllites, biotite and other micas schists, sometimes containing feldspars, talc schist, vermiculite schist, associated with altered peridodites and intruded by quartz veins, granitic pegmatites, and tourmaline-bearing granitic rocks.