The Sleeping Giant deposit is a member of the type of gold deposits formed by groups of veins with gold associated with sulphide minerals and whose geometry the stress field in the rocks at the time of vein formation (Birkett, 2008).

At the Sleeping Giant mine, gold mineralization is found in quartz-sulphide veins. The best mineralized veins typically contain four sulphide minerals: pyrite, pyrrhotite, chalcopyrite and sphalerite, which form 5 to 60% of the veins. The typical vein thickness is between 20 and 80 cm with average grade between 35 and 85 Au g/t (uncut channel sample analyses). In addition to gold, the veins contain silver and a small proportion of copper and zinc. The gold:silver ratio is about 1:2. Zones 20 and 30 have a lateral/vertical continuity of 300 m/670 m; that is to say, they have a much greater vertical continuity than lateral. In Zone 8, the lateral/vertical continuities are more than 600m/500 m.

Gold mineralization occurs in four cogenetic styles that are rich in base-metal sulphides: (1) narrow quartz veins, which are economically most important, (2) stratabound ore within sedimentary horizons, (3) quartz veining within QFP dikes, and (4) quartz veinlet arrays. Ore controls correspond to primary permeable features such as: (1) stratigraphic contacts, (2) specific lithological units, (3) synvolcanic faults and (4) preexisting joints. The geometry of the orebody displays an increasing complexity toward the south, i.e., toward th ........

A mining plan has been prepared to extract 325,000 tonnes of reserves over a 4-year period including one year of pre-production (25,000 tonnes) followed by the three years with an annual production of 100,000 tonnes per year. The remaining 14,221 tonnes of reserves, not extracted by this mining plan, will be extracted later in subsequent operations following additional exploration and development work. There are good possibilities of extending the production period by doing additional exploration work on the indicated resources excluded from the mining plan and on the inferred resources and converting the latter into measured or indicated resources and eventually into reserves.

The mineralization is typically in narrow veins. The dip varies between 30o and 80o. The mining methods will be shrinkage and room and pillars. The long-hole method is not favored but will be used where the other methods are not adequate.

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