The Toranica orebodies occur as a series of lenses of variable thickness and persistence, hosted within a quartz graphitic schist some 180m wide in contact with a quartz latite intrusive body. This sequence is overlain by gneiss.
The mineralization consists of three sub-parallel zones, each composed of two to three lenses. Most of the mineralization lies in the contact zone between the graphitic schist and underlying quartz latite, or overlying gneiss, but also with some mineralization in the middle of the graphitic schist zone.
Orebodies dip variably (average around 40o), range in thickness from 0.2-40m and can be traced for up to 1,000m. Principal ore minerals are galena and sphalerite.