The Buck showing is located at an elevation of approximately 1050 metres on an east facing slope, west of Guichon Creek and approximately 3.5 kilometres east of the north end of Gypsum Lake.

The area lies near the eastern border of the Upper Triassic to Lower Jurassic Guichon Creek batholith. The area between Guichon Creek and Cougar Creek south of Mamit Lake is underlain by mainly intermediate to mafic volcanic rocks of the Upper Triassic Nicola Group. These rocks are in contact with granodiorites to the north (Gump Lake phase) and to the west (Highland Valley phase). Approximately 1200 metres west of the showing, the Nicola Group rocks are overlain by Eocene Kamloops Group volcanic flows.

Locally, a dark, medium-grained gabbro (Guichon) is cut by a few east-west trending, vertical shear zones. The shears are 5 to 15 centimetres wide, up to 60 metres in length and carry chalcopyrite, pyrite and malachite mineralization.

A similar brecciated shear zone containing chalcopyrite is exposed in trenches approximately 1000 metres northwest of and 81 metres above the Buck adit.

Work History

A historic adit and numerous trenches of unknown age are reported in the occurrence area.

In 1958, Craigmont Mines Ltd. completed a magnetometer survey on the area.

In 1969, Mamit Lake Mines completed a program of geochemical (soil, silt and rock) sampling and geophysical (magnetometer and induced polarization) surveys on the area as the Blueberry, Buck, Dude and Lee claims. In 1971, a further program of soil sampling and a 11.0 line-kilometre ground magnetic survey was completed.

In 1972, a 1112 line-kilometre airborne magnetic survey was completed on the area as the MLM and GCM claims. In 1975, Yukonadian Mineral Exploration Ltd. completed a program of geochemical (soil) sampling on the Buck claims.

In 1982, Cominco Ltd. completed an induced polarization survey on the area as the Antler, Buck, Elk, Lake and Score claims of the Gump property.

In 1999, Tarco Oil and Gas Ltd. held the area as the as the Gypsy-Roy property.

In 2006, Gary Brown completed a program of prospecting and photo-geological interpretation on the area as the Chat and Skuhun claims of the Copper Hill property.

In 2018 and 2019, Granby Gold Inc. completed programs of geological mapping and soil sampling on the area as the Mamit Lake property.