The Argo showing is located on the Belt Reverted Crown grant (Lot 2139) just north of Sandon, at 1310 metres elevation above sea level in the Slocan Mining Division.

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 is hosted within argillaceous quartzite of the Slocan Group which are cut by three small quartz porphyritic dikes probably related to the Nelson intrusions. The sedimentary rocks strike 125 degrees and dip southwest. The occurrence consists of a quartz vein within a fissure zone that strikes 065 degrees and dips 45 degrees southeast. The vein is 30 to 60 centimetres wide at surface and mostly composed of crushed rock and quartz with minor galena and sphalerite. It has been explored with three short adits but all failed to identify significant mineralization.