The Holk occurrence is located on the north side of a creek flowing into the Alberni Inlet, approximately 3 kilometres southwest of Port Alberni.

The area is underlain by andesite of the Upper Triassic Karmutsen Formation, Vancouver Group.

The Holk showing consists of three quartz veins. One vein is 1.2 metres in width and carries up to 20 centimetres of chalcopyrite ore. Two quartz veins, relocated in the late 1980's, are 20 centimetres in width and strike 180 and 230 degrees. Both veins contain 1 per cent pyrite and lesser chalcopyrite.

Work History

By 1901, a tunnel had been driven for 15 metres on the vein, producing about 7 tonnes of ore. No record, however, of any ore shipment exists. In 1962, Cruikshank Explorations completed an induced polarization survey over an area covered by the Holk claim group. Three diamond drill holes were presumably drilled in 1962, a little mineralization is mentioned in DDH #3. This mineralization is reported to be in the vicinity of an IP anomaly. In 1986, United Chieftan Resources completed a prospecting program. In 1988, Napier Exploration completed a program of geochemical sampling and geological mapping on the area. Five rock samples taken assayed between 0.24 and 0.68 per cent copper. One of these samples also contained 12.7 grams per tonne silver and 0.2 grams per tonne gold (Assessment Report 17557).

In 1989, Brockton Resources completed a program of geological mapping and geochemical rock and soil sampling.

SYMC Resources Limited explored the area in 1998 to 2006 as part of their Dauntless (Macktush) property. On its Dauntless project SYMC completed trenching and 1062 metres of drilling in 15 holes on three copper-silver-gold targets - the Dauntless North vein (MINFILE 092F 168) and Herb Jr. vein and Tasha zone.

In 2009 through 2011, G4G Resources completed programs of geological mapping and rock and soil sampling on the area as the Macktush Copper property. During 2012 through 2014, Nahminto Resources completed exploration programs including limited prospecting, rock sampling, geological mapping and a satellite remote sensing survey and analysis on the Macktush group. A similar prospecting, geological mapping and rock sampling program was conducted on areas of the Macktush property for World Organics Inc. in 2015.