The Granite King occurrence consists of a single Reverted Crown grant (Lot 4538) situated on the southeast flank of Mount Carlyle, in the Slocan Mining Division, at 2347 metres elevation above sea level.

Regionally, the area lies on the western margin of the Kootenay Arc, in allochthonous rocks of the Quesnel Terrane. In the vicinity of the occurrence, the Quesnel Terrane is dominated by the Upper Triassic Slocan Group, a thick sequence of deformed and metamorphosed shale, argillite, siltstone, quartzite and minor limestone. Rocks of the Slocan Group are tightly and disharmonically folded. Early minor folds are tight to isoclinal with moderate east plunging, southeast inclined axial planes and younger folds are open, southwest plunging with subhorizontal axial planes. The sedimentary sequence has been regionally metamorphosed to lower greenschist facies.

The Slocan Group has been intruded by the Middle Jurassic Nelson intrusions which comprise at least six texturally and compositionally distinct phases ranging from diorite to lamprophyre. The most dominant phase is a medium to coarse grained potassium feldspar porphyritic granite (Paper 1989-5).

The occurrence consists of narrow, brecciated quartz-siderite veins emplaced along shears within porphyritic granite of the Nelson intrusions. The veins consist mostly of broken angular blocks of granite cemented by quartz and siderite. Galena, sphalerite and pyrite are disseminated within the gangue minerals. Small amounts of native silver occurs as wires on the vein walls and minor scheelite has been noted. A grab sample collected from the vein in 1979 assayed 199 grams per tonne silver, 17.2 per cent lead, 11.5 per cent zinc and 0.08 per cent tungsten (Assessment Report 7950). At least two veins have been explored, the main vein is 5 to 70 centimetres wide, strikes 050 degrees and dips 60 degrees northwest. The second vein is 3 metres east and parallel to the main vein. It is 5 to 30 centimetres wide and has the same mineralogy.

The veins have been exposed in three short adits and a crosscut was driven from the lower Flint adit (082FNW083), 750 metres northeast, to intersect the vein 100 metres below the Granite King workings.