The Skull occurrence is one of three disseminated sulphide occurrences (stibnite-arsenopyrite-pyrite) associated with a highly silicified multi-stage, epithermal-style breccia spatially associated with the Tomogonops-Moose Lake shear-zone. The zone strikes 115°, dips 75° to 80° and has been defined by drilling over 120 m along strike. The best intersection at the Skull showing was 2.0 g/t Au over 0.6 m at a depth of 120 m in drillhole SL-88-04.

At surface, the Skull showing consists of several multi-stage siliceous breccia boulders containing up to 10% stibnite and 1% pyrite. Two grab samples contained 4.32% and 1.86% Sb. Trench samples contained an average grade of 0.37% Sb and 55 ppb Au over a strike of 13 m and width of 2 m. Seven grab samples contained values between 1 and 3.7% Sb, and up to 894 ppb Au.

Extensive alteration is commonly associated with the breccia, which generally follows the granite-volcanic rock contact, ranges between 4 m and 20 m thick, and has been intersected to a depth of 128 m. Mineralization is coincident with a VLF-EM anomaly.