The Cordillera occurrence is located about 520 metres west of the Skeena River approximately 16 kilometres north-northeast of Terrace. The Luck Luke workings (103I 039) are 800 metres south of the Cordillera workings.

The area is underlain by andesite flows, chlorite schists, and tuffs of probable Triassic age. The rocks are cut by lamprophyre dikes. Several quartz veins, striking 040 degrees and dipping 25 to 45 degrees northwest, contain sparse bornite, chalcocite, chalcopyrite, and gold. The veins are up to 30 metres long and up to 3.0 metres wide. The vein system extends for about 150 metres along strike. A 1.0-metre sample of one vein assayed 13.7 grams per tonne gold, 130.3 grams per tonne silver and 7.1 per cent copper (Geological Survey of Canada Summary Report 1925A). Tungsten has also been reported.

Recorded production for the period 1915-1922 totals 73 tonnes of ore milled and/or shipped from this property. From this ore, 1151 grams of gold, 6875 grams of silver and 15,881 kilograms of copper were recovered. No documented work since 1930 has been recorded on this property.

In 1989, a mineral exploration program including geochemical soil sampling and a VLF-EM (electromagnetic) survey was carried out in order to further delineate mineral targets. Results showed that the claim group was conducive to hosting copper and gold mineralized quartz veins (Assessment Report 18685).

In late fall 2012, Argonaut Exploration Inc. conducted two separate field examinations to locate the remnants of the Cordillera gold mine. Old rail tracks, a waste dump, one upper adit and a lower adit were located. A quartz-bearing shear zone with a mineralized quartz lens 1 by 3 metres was located directly beside the upper adit at 141 metres elevation within altered chloritic schist. Patchy areas within the quartz lens contain significant sulphides that include bornite and pyrite with common green malachite. A 1.4-kilogram bulk sample composed of three separate samples was collected from the quartz vein and analyzed. The resultant weight-corrected average grade returned 6.64 grams per tonne gold, 94.0 grams per tonne silver and 3.9 per cent copper, which is similar in grade and composition to the weight-corrected average grade result obtained from the Lucky Luke (103I 039) ore dump 820 metres southwest (Press Release - Argonaut Exploration Inc., December 14, 2012).