Geologically, extensive zinc and lead sulphide mineralization (sphalerite and galena) is hosted within an east-west trending dolomitized reef structure at shallow depths. Mineralization is by replacement and void-filling with sulphides deposited as colloform as well as coarse, vug-fill styles. On the project scale, concentrated sulphides are present in two deposit types: 1) Tabular: consisting of horizontal, locally continuous, mineralization, and 2) Prismatic: consisting of near vertical pinnacles of strong sulphide development. It is likely that the tabular deposits represent lateral fluid channel ways that connect the prismatic bodies. Both types of deposits are abundant in three parallel trends named the North Trend, Main Trend and the South Trend.