mining is exploiting the lower set of stockwork veins, which may continue to step to the east

in further en echelon steps such as the Deep East zone, and potential further steps to the east

of that. In addition, there is also potential for another new set of en echelon stockwork veins

and associated shear veins 500-1500 feet below (east-northeast) of the current area of

mining. The down dip projection of veins currently being mined is still open; increasing

displacement and strike length of shear veins at the lowest levels suggests that they may

continue significantly to depth, although the A vein system is thinning and approaching the

maximum dimensions of other stockwork veins developed above, suggesting that it may be

near its limits. Other areas of high exploration potential within or near the mine workings

include (i) the D shaft area between 30 and 4920 levels, where vein systems in the 30-200

and Puff subdrifts, and the Deep West shear veins may continue, (ii) potential for a small

shear system in the footwall of the C shear vein below 5040 level that may represent the top

of a new shear vein, (iii) areas southeast of the historic area of mining where the SAM unit

obtains a 200-400 feet thickness that is comparable to that in the historically mined areas.

Further en echelon steps of stockwork veins east of and beyond the 40, 50, and 60 stockwork

veins may occur in the latter area. Outside the immediate area of the mine workings,

exploration potential exists (i) in other portions of the SAM unit where the unit forms

thickened lobes of optimum thickness, or where shear zones are developed, (ii) in unit A, a

gabbro-mafic volcanic unit south of the SAM unit, and (iii) where the northwest trending

Rice Lake shear zone intersects the SAM unit and unit A.