In 1991, Toltec Resources Ltd. collected rock samples north and south of Tunjony Lake. Field work consisted of limited contour soil sampling (3.7 kilometres of line; 52 samples), silt sampling (13 samples) and 1:10,000 scale mapping and prospecting. During mapping, samples of altered and mineralized float and outcrop were routinely taken (36 samples).

Six of the rock samples show significant copper values (0.25 to 2.0 per cent) (Assessment Report 22209). Of these six samples, sample 18874 is from the silicified, brecciated contact between quartz monzonite of the Tertiary Sloko-Hyder Plutonic Suite and Upper Triassic Stuhini volcanics (andesitic tuffs and agglomerates). No sulphides were noted in this sample, but malachite was abundant. The remaining five copper-rich samples are from a narrow, shear-controlled quartz-sericite alteration zone (samples 18878 - 18880) and from erratic chalcopyrite stringers (samples 18897 and 18898). Sample 18882 yielded 0.38 gram per tonne gold and 66.7 grams per tonne gold (Assessment Report 22209).