The Gold Ledge (Gold Key) occurrence is located on a high ridge separating the eastern head waters of Pyramid Creek and the south western headwaters of Matthew Creek, approximately 6.2 kilometres north west of Bootleg Mountain.
The area lies within the Purcell Anticlinorium. The Proterozoic Purcell Supergroup is exposed in the core of the anticlinorium with the Lower Aldridge Formation forming the basal part of the Purcell Supergroup. The Lower Aldridge Formation composed of thin-bedded, rusty, quartzitic wacke and siltstone. The formation is conformably overlain by the Middle Aldridge Formation, composed of thin- to medium- bedded, rusty to grey-weathering quartz wacke, quartzitic wacke and siltstone units.
Locally, underground workings consist of a 41-metre drift with a 14-metre- wide crosscut. The crosscut exposes 2.4 metres of quartz-filled breccia and 7.6 metres of fractured quartz with chalcopyrite, pyrite and arsenopyrite mineralization. These are hosted by quartzite and siltstone.
In 2000, a select dump sample (16732) assayed 0.19 gram per tonne gold, 77.5 grams per tonne silver, 0.495 per cent lead, 0.117 per cent zinc and 3.17 per cent copper (Assessment Report 26361). In 2011, grab samples from talus returned 4.97 per cent lead and 52.8 grams per tonne silver (Assessment Report 32814). Gold values up to 34 grams per tonne are reported at the main Gold Ledge workings from previous selected sampling (Assessment Report 33978).
Approximately 1.5 kilometres south west of the Gold Ledge workings, a series of short, underground adits and shafts, referred to as the Lake zone, are reported. In 2011, several character grab samples from the dump material assayed up to 1.18 per cent copper, 99.5 grams per tonne silver with 3.61 to 5.42 per cent lead and 6.56 to 9.61 per cent zinc (Assessment Report 32814).
Another adit is reported in the eastern head waters of Pyramid Creek, approximately 2 kilometres to the south west. The adit exposes a quartz vein with arsenopyrite and galena mineralization. In 2000, a select dump sample (16738) assayed 5.6 grams per tonne silver and 0.274 per cent lead (Assessment Report 26361).
Several small-scale workings, mainly in quartz veins and shears, are in the Alki Creek and Upper Pyramid Creek areas and date to the 1890’s or early 1900s. In 1979, Cominco completed a program of soil sampling and geological mapping on the area as the Clair claims. In 1982 and 1983, Cominco completed a ground electromagnetic survey and a seismic survey on the area. In 1992, Cominco completed a 14.0 line-kilometre ground electromagnetic survey on the area. During 1996 through 1999, Abitibi Mining completed exploration programs of rock, soil and silt sampling, prospecting and geological mapping on the area as the Clair, Cleo and PMR claims. In 1999 and 2000, Rio Algom Exploration completed exploration programs consisting of geological mapping and rock sampling on the area as the Pyramid Peak property. In 2001, Abitibi Mining completed a program of geological mapping on the area. During 2011 through 2013, Electra Gold completed programs of rock sampling, geological mapping and prospecting and a photo-geological interpretation program on the area as the Goldledge property. In 2014, Homegold Resources conducted prospecting and sampling in the area.
