The TB occurrence is located a few hundred metres up hill to the north west of the Shack (MINFILE 092F 045) occurrence, approximately 4.7 kilometres north of Kennedy Lake.

Karmutsen Formation volcanics and Quatsino Formation limestones of the Upper Triassic Vancouver Group are intruded by the Early to Middle Jurassic Island Intrusions consisting of granodiorite to quartz diorite. The volcanic rocks consist of andesitic to basaltic flows, tuffs and volcaniclastics. West-northwest trending fault/ shear zones of Tertiary age cut the rocks.

The TB vein is emplaced in a footwall splay of the Mine fault that cuts Quatsino limestone at and/or adjacent to its contact with Karmutsen andesites. The 15 to 50 centimetre wide vein strikes 084 degrees and dips 70 degrees to the north. It has been traced along strike for a total of 38 metres.

The limestone host, well brecciated and weakly silicified, has an additional 20 to 40 centimetre wide silicified and chloritized halo about the vein. The vein is mineralized with clots and masses of pyrite, chalcopyrite and bornite. A 0.15 metre assayed a high gold value of 18.55 grams per tonne with 9.94 grams per tonne silver. Another 0.25 metre sample contained a high silver value of 547.89 grams per tonne with 0.86 grams per tonne gold (Henneberry, 1987).

Andesite and felsic rock have locally been altered to garnet-magnetite-diopside skarn. The skarns are most pervasive near faults and along the margin of limestone beds. They locally contain epidote, pyrite, chalcopyrite, pyrrhotite, hematite, malachite, azurite and quartz veinlets. Magnetite occurs as crystals, irregular masses and as bands up to 0.20 metres wide.

Skarn mineralization occurs about 25 metres to the south west of the western limit of the TB vein and about 15 metres north of the eastern end. In 1988, a sample from the south western skarn contained 2.33 grams per tonne gold, 9.60 grams per tonne silver and 2.78 per cent copper across 43 centimetres. A selected sample from the northern skarn assayed 1.44 grams per tonne gold, 40.46 grams per tonne silver and 10.53 per cent copper (Assessment Report 18693).

The Grisley Bear claim was originally staked in the period around 1899 to 1902 and owned by T.O. MacKay. In 1938, the claims were sold to Kennedy Lake Gold Mines. In 1988, Golden Spinnaker Minerals completed a program of geological mapping, ground magnetic surveys, geochemical sampling and seventeen diamond drill holes, totalling 908 metres. In 2009 and 2010, G4G Resources Limited completed a program of prospecting and remote sensing, consisting of spectral analysis and synthetic aperture radar analyses, on the area as the G4G property.