The Keno occurrence is located at 1980 metres elevation above sea level, between Robb and Twelve Mile creeks, in the Slocan Mining Division.

According to Cairnes (1935, p. 227): "The Keno property, comprising one or more claims held by location is about 1067 metres above and 6.4 kilometres by trail southeast of Baylock. The workings include three adits, of which the lower two were inaccessible in 1925."

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.

South of the occurrence, 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. Several feldspar porphyritic granodiorite dikes, apparently related to the Nelson intrusions, also cut the sedimentary sequence near the occurrence (Paper 1989-5).

The occurrence consists of a brecciated vein within grey limestone and calcareous argillite of the Slocan Group. The shear strikes north and dips 50 degrees east and is composed essentially of broken wallrock and gouge. The shear, which has been explored with three adits, is 30 to 120 centimetres wide. At 16 metres from the portal the shear splits into an east trending, vertically dipping segment and a south trending, east dipping segment. The east-trending shear cuts a porphyritic dike 10 metres from the split and pinches out 6 metres past the dike. The drift following the south shear was abandoned 14 metres past the split where the shear was 60 centimetres wide. Mineralization within the shear consists of galena, sphalerite and tetrahedrite in the quartz matrix cementing the brecciated wallrock.

Production in 1921 yielded 4665 grams of silver and 1361 kilograms of lead from 3 tonnes of ore.