The Buck 1 occurrence is located in the headwaters of a easterly flowing tributary of Cous Creek, approximately 10 kilometres west- northwest of the creek mouth. Buck 1 is 13 kilometres west-southwest of Port Alberni.
The area is underlain by basaltic volcanic rocks of the Upper Triassic Karmutsen Formation, Vancouver Group. To the north calc-alkaline volcanic rocks of the Lower Jurassic Bonanza Group outcrop.
Locally, chalcopyrite is hosted by a pyritic, slightly kaolinized, volcanic rocks of the Karmutsen Formation. A 30 centimetre wide dacitic dike intrudes volcanic porphyry about 100 metres to the west of the occurrence and strikes 045 degrees with a dip of 80 degrees to the west. The dike and the country rock contain about 2 to 3 per cent pyrite.
In 1980 through 1983, Pacific Seadrift Resources completed programs of airborne and ground geophysical surveys, geological mapping and geochemical sampling on the area. In 1985 and 1986, Amstar Venture Corporation completed programs of geochemical sampling on the Kola claims. In 1986, Mariah Resources completed a program of geological mapping and minor trenching on the Buck 1-3 claims. In 1987, Stonewall Resources completed a program of ground geophysical surveys, geological mapping and geochemical sampling on the Buck claim group. A 30 centimetre wide sample of the pyritic volcanic outcrop contained 0.25 per cent copper, while a 30 centimetre chip sample of the dacitic dike assayed 0.62 grams per tonne gold and 0.1 per cent arsenic (Assessment Report 17152).
SYMC Resources Limited explored the area in 1998 to 2006 as part of their Dauntless (Macktush) property. 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 Ltd. 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.
