The COLUMBIA showing is located on Lot 958s on the northwest flank of Mount Franklin, approximately 3.75 kilometres north of the summit.
The showing consists of pyrite and chalcopyrite in a shonkinite- pyroxenite, a minor phase of the alkalic Eocene Coryell Intrusions. It has been suggested that the pyroxenite is a basal cumulate of an early monzonitic intrusion, which was later intruded and engulfed by an augite-syenite intrusion. To the south there is a pendant of Devonian-Triassic Harper Ranch Group rocks. Several kilometres to the east are andesite and dacite flows and tuffs of the Eocene Marron Formation, Penticton Group.
The COLUMBIA claim was Crown granted in 1910 as Lot 958s. No work was recorded on the showing during the early 1900s when the Franklin camp was very active. Two adits, one 175 metres south of the northern one, are believed to date from that period. Both adits are included in the COLUMBIA showing.
In 1918, the showing was investigated for its platinum potential. A sample of pyroxenite containing pyrite and chalcopyrite, was collected from the adit dumps. It assayed 1.37 grams per tonne platinum (Thomlinson, 1920).
In 1964, Franklin Mines Ltd. acquired much of the Franklin camp and carried out detailed geological mapping and geophysical surveys in a number of locations. The COLUMBIA showing was not covered by any of the detailed surveys.
In 1986-87, Longreach Resources Ltd. and Placer Dome Inc. carried out a major exploration program in the Franklin camp area. It is probable that the COLUMBIA showing was prospected during this time, but no work was recorded.
Similar platinum occurrences nearby are the OTTAWA (082ENE061), BUFFALO (082ENE008), GOLDEN (082ENE053) and MOUNTAIN LION (082ENE055) showings.