The Buffalo property is situated on Avison Creek at 1585 metres elevation above sea level in the Slocan Mining Division. The underground workings are on the Buffalo Crown grant (Lot 674) (forfeited).

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 very fine grained clastic sedimentary rocks of the Upper Triassic Slocan Group that include locally weakly metamorphosed argillite, quartzite, limestone and some tuffaceous rocks. These sedimentary rocks are intruded by dikes, sills and stocks of varied composition and origin. Permian and/or Triassic Kaslo Group metamorphosed volcanic rocks occur to the north of the Slocan Group rocks. Middle Jurassic Nelson intrusions are immediately south of the Slocan Group and are inferred to be the source of granitic to pegmatitic sills and dikes found in the area. The Nelson intrusions 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 Buffalo occurrence is hosted by calcareous, mostly massive argillites and quartzites of the Slocan Group. The sedimentary rocks are cut by a granitic dike, probably related to the Nelson intrusions. The occurrence consists of a fissure vein located within a fault zone subparallel to bedding. Rocks on the hangingwall side of the fault have been horizontally displaced about 10 metres north with respect to the footwall side. The fissure strikes 050 degrees, dips 55 degrees southeast and is about 1 to 1.5 metres wide. It has been explored with three short adits over a vertical range of about 75 metres.

The Buffalo vein intersects and merges with the Mammoth vein on the No. 8 level of the Mammoth mine (082FNW060) to the northwest. The vein consists of galena, sphalerite and tetrahedrite in a gangue of quartz and crushed wallrock. The wallrock is strongly silicified adjacent to the vein and sulphide mineralization appears more concentrated on the hangingwall side of the vein.

Production records for the Buffalo occurrence are incomplete because the ore was combined with that of the Mammoth (082FNW060) and the Standard (082FNW180) after 1928. Production between 1905 and 1928 yielded 480,572 grams of silver, 25,794 kilograms of lead and 13,239 kilograms of zinc from 103 tonnes mined.