The Millington occurrences are located on the northern slopes of Mount Hansen, approximately 2 kilometres west of the community of Holberg.
Regionally, the area is underlain by a northwest trending series of sedimentary and volcanic rocks comprising basaltic volcanic rocks of the Upper Triassic Karmutsen Formation (Vancouver Group) which is overlain by limestone of the Upper Triassic Quatsino Formation (Vancouver Group) and limestone, mudstone and siltstone of the Upper Triassic Parson Bay Formation (Bonanza Group). The occurrence area is underlain by amygdaloidal basalts of the Upper Triassic Vancouver Group Karmutsen Formation.
The main occurrence, located on Crackerjack Creek, consists of lenses of massive bornite, chalcocite, covellite, chalcopyrite and native copper up to 1.2 metres in width. Disseminations of bornite with minor chalcopyrite and chalcocite occur within amygdules of the basalts. Bornite also occurs as fracture fillings in the volcanics. Mineralization has been traced along strike to the northwest for at least 175 metres.
A sample from a dump near an adit entrance, at an elevation of 116 metres, assayed trace gold, 5.6 grams per tonne silver and 2.1 per cent copper. A selected sample from the open cut at the ‘Number One’ adit, at an elevation of 149 metres, assayed trace gold, 56.2 grams per tonne silver and 21.0 per cent copper (Minister of Mines Annual Report 1919, page 206). In 1990, sampling of bornite-bearing dump material assayed 3295 to 99,999 parts per million copper and up to 93.7 parts per million silver (Assessment Report 20159).
A "vein of similar mineralogy" occurs 150 metres west of the old workings (Minister of Mines Annual Report 1927). In 1990, a sample from an old trench in this area assayed 29,838 parts per million copper and 4.3 parts per million silver (SK-11; Assessment Report 20159).
In 2019, MK2 Ventures Ltd. identified four historic adits and at least six historic open-cuts in the area. Five select rock samples from the area yielded values from 5.86 to 41.56 per cent copper and 5.1 to 186.6 grams per tonne silver, while float samples taken from the south side of Mount Hansen yielded up to 1.5 per cent copper (van der Meer, L. (2019-06-06): Technical Report on the Bakar Property).
Work History
Between 1918 and 1930, the claims over the area were held by D. Spooner and associates of Holberg. At this time, development work consisted of prospecting, trenching, tunnelling, and minor diamond drilling. Between 1962 and 1969, Holberg Mines completed programs of surface stripping, trenching, and diamond drilling. In 1990, Lone Trail Prospecting staked the area as the Skeet claims and completed a program of prospecting and geochemical sampling. In 2018 and 2019, MK2 Ventures Ltd. and District Metals Corp. completed programs of prospecting, geological and structural mapping, geochemical (rock, soil and stream sediment) sampling, and an 804 line-kilometre airborne geophysical (VTEM) survey on the area as the Bakar property.
