The Goldbridge showing is situated on the south side of Mount Penrose at approximately 1676 metres elevation and approximately 8.85 kilometres west of Goldbridge.
The area is underlain by Triassic Cadwallader Group sediments and volcanics, including soft brown and green, siliceous and calcareous argillites with sandstone and conglomerate Hurley Formation and tuffs and amygdaloidal lavas of the Pioneer Formation. Biotite and hornblende diorite, granodiorite and granite Eldorado phase stocks of the Cretaceous Coast intrusions occur to the north and southwest.
The occurrence can be divided into an upper and lower showing, situated approximately 150 metres apart in elevation. Mineralization is wholly confined to massive andesite-basalt flows with little to no alteration or fracturing. Malachite occurs as staining along joint planes and disseminated pyrite and minor chalcopyrite are present. Malachite staining is visible on vertical cliffs at the showings. Large sections of rock between the upper and lower showings are barren of sulphides, indicating the mineralization could be quite localized. Rare, narrow seams of up to 40 per cent pyrite and chalcopyrite occur in the area of the showings.
The property was owned by Ed Szwagrzyk of Gold Bridge. In 1977, at the invitation of Szwagrzyk, Barry Manchuk of Falconbridge Nickel Mines Limited paid a brief visit to the property. Several chip samples were collected from both the upper and lower showings. Though some samples did return notable results for copper, Falconbridge declined any involvement in the property based on size limitations and generally low grades.
Several chip-grab samples collected from the lower showing during the 1977 Falconbridge sampling program returned notable assays. Two 3-metre chip samples, samples 683 WW and 684 WW, assayed 0.23 per cent copper and 0.39 per cent copper, respectively. Sample 685 WW, collected from a narrow 5-centimetre seam of 40 per cent pyrite with chalcopyrite, assayed 3.92 per cent copper (Property File, Manchuk, January 31, 1977, page 2).
