Sedimentary Copper deposits are typically hosted in carbonate rocks within intracratonic sedimentary basins that have been subjected to gently folding and local faulting. Dolomite and limestone are the most typical host rocks, often reefal in nature, and with porous and permeable beds. The best zones of mineralization are usually coincident with zones of dolomitization.

Examples of deposits in this class include Kipushi (70 Mt @ 4.8% Cu, 8.8% Zn, 0.5% Pb), Kennecott (4.4 Mt @ 12.4% Cu, 95 g/t Ag), Ruby Creek (90 Mt @ 1.2% Cu). Gross metal values can be very high in these deposits.

Individual deposits can be pipe-like to tabular and are often irregular and discordant with strong elongation in one direction. Deposits can be up to several hundred metres in size and can be associated with Zn rich lenses, pods or deposits nearby. Copper mineralization is zoned vertically in many deposits with the more copper rich phases (chalcocite, bornite) closest to surface.

The Storm copper property contains most of the large and small-scale attributes and characteristics that are typical of this class of deposit

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