The Columbia-Kootenay occurrence is located at an elevation of approximately 1188 metres on the eastern slope Columbia Kootenay Mountain, northeast of the community of Rossland.

Regionally, the area is underlain by the Lower Jurassic Elise Formation (Rossland Group) volcanic breccia, conglomerate and sandstone sequence, which dips uniformly at moderate angles to the west. Primary sedimentary structures indicate the beds face west and only small north-trending faults cause minor offsets. The Rossland sill of the Elise Formation forms an irregular mass of augite porphyry in the thin-bedded sedimentary and massive volcanic breccias and conglomerates. The sill is difficult to distinguish from the thermally metamorphosed Rossland Group rocks.

The Rossland Group rocks are intruded to the north by granodiorite of the Middle Jurassic Trail Pluton and to the south by quartz monzonite of the Early Jurassic Rossland Plutonic Suite, which is composed of a biotite-hornblende-augite monzonite stock. The contact with the monzonite is gradational and grades northward into the volcanic conglomerate over a distance of 300 metres. A zone of thermal metamorphism has bleached the well-indurated hornfels of the Rossland Group, which contains pyroxene and garnet. A swarm of diorite dikes crosscut both the monzonite and Rossland Group rocks. Also, the Middle Eocene Coryell syenite intrudes the Rossland Group rocks to the south.

The Columbia-Kootenay vein system is part of the ‘Main vein’ system, which forms a continuous, well-defined fracture system on a regional scale. The Main vein system trends 070 degrees for a strike length in excess of 1.0 kilometres and consists of mineralized fracture fillings that dip steeply north. Refer to the Le Roi deposit (MINFILE 082FSW093) for further details on the Rossland mining camp and the Main vein system.

The mineralized zone trends northeast and dips between 45 to 75 degrees northwest, passing through both the Columbia and Kootenay Crown grants. The mineralized zone follows a contact between biotite-bearing monzonite, which forms the hangingwall, and augite porphyry (Rossland sill), which forms the footwall and appears to have been replaced by the ore. The ore consists of both massive and disseminated pyrrhotite in a hard, fine-grained gangue with minor chalcopyrite. Arsenopyrite occurs in places with the auriferous pyrrhotite. Much of the ore, that is made up of sulphides in calcite and altered rock gangue, appears to be laminated. The vein is fairly continuous and varies in width from a few centimetres up to 10 metres of nearly solid pyrrhotite. A nickel arsenic sulphur, gersdorffite, is reported to occur in small octahedral crystals in the sulphide ore and is associated with the massive pyrrhotite and chalcopyrite from the Columbia-Kootenay vein. Also, native bismuth and bismuthinite are associated with minor chalcopyrite. The ore shoots end abruptly against cross structures.

In 1984, a dump sample (83172) of massive sulphides in a siliceous matrix assayed 6.1 grams per tonne gold, 4.1 grams per tonne silver and 0.44 per cent copper (Assessment Report 14236).

In 1986, a chip sample (83138C) of massive pyrrhotite in augite porphyry assayed 60.9 grams per tonne gold over 0.25 metre, whereas a 2.0-metre chip sample (83141C) of massive pyrite-pyrrhotite with quartz in a granodiorite assayed 9.4 grams per tonne gold (Assessment Report 15432). Also at this time, 11 dump samples yielded from 0.5 to 52.1 grams per tonne gold with an average of 10.4 grams per tonne gold (Assessment Report 15432).

Another chip sample (951E), taken a short distance east over a 1.3-metre wide massive arsenopyrite veinlet with lesser pyrrhotite and trace chalcopyrite along the northeast contact of a ‘conglomerate’ (breccia?) dike, yielded 5.0 grams per tonne gold, whereas nearby float samples yielded up to 38.3 grams per tonne gold (Sample 980E; Assessment Report 15432).

The area has been explored since the late 1800s, with the Crown-granted mineral claims being staked in 1890. Prior to 1898, approximately 4000 metres of underground development work had been completed with unverified reports indicating a total of approximately 11 617 tonnes averaging 13.0 grams per tonne gold being produced (Assessment Report 15432).

Between 1896 to 1904, it is reported that 144 tonnes of ore were mined yielding 68 520 grams of gold.

In 1940, reserves were estimated at approximately 9072 tonnes grading 5.1 grams per tonne gold (Assessment Report 15432).

During 1982 through 1986, Gallant Gold Mines Ltd. completed programs of rock and silt sampling, geological mapping, ground geophysical surveys and seven diamond drill holes, totalling 694.0 metres, on the area as the Georgia property.

In 2011, a 2.4 line-kilometre ground electromagnetic (VLF-EM) survey was completed on the Copper Jack (L.1185) Crown grant to the northeast as apart of the Crown of Eleanor property. In 2012, a further 4.0 line-kilometre ground electromagnetic (VLF-EM) survey was conducted. In 2017, a program of prospecting was completed on the former Crown grants to the northeast. In 2018, Currie Rose Resources Inc. completed a 164.8 line-kilometre airborne magnetic survey on the area.