The Bryan occurrence is located on the north flank of Coppercrown Mountain near the headwaters of Mineral Creek at 1800 metres elevation above sea level, in the Golden Mining Division.

The area is underlain by Proterozoic clastic sedimentary rocks and Cretaceous intrusive rocks. The occurrence is within the Dutch Creek Formation of the Proterozoic Purcell Supergroup. The Purcell Supergroup strata include the Aldridge, Creston, Kitchener, Dutch Creek and Mount Nelson formations (Paper 1990-1).

In the vicinity of the occurrence, rocks of the Kitchener and Dutch Creek formations have been further subdivided and assigned to the Van Creek and Gateway formations (Open File 1990-26).

The Dutch Creek Formation includes green and black laminated argillite, quartzite, siltstone and buff dolomitic siltstone. The Van Creek Formation consists mainly of coarse to medium grained, light grey to dark green quartzite, siltstone and silty argillite and correlates with the strata of the Lower Kitchener Formation.

The Gateway Formation consists of an interbedded sequence of quartzite, green siltstone and buff dolomite that correlates with the lower portion of the Dutch Creek Formation. The contact with the underlying Van Creek Formation is gradational or marked by the basaltic flows of the Nicol Creek Formation.

The sedimentary rocks have undergone regional metamorphism to at least greenschist facies.

The occurrence consists of several small pits dug in 1905 to expose a narrow zone containing silver and copper values over 1.2 metres in width. The occurrence is probably in argillite of the Dutch Creek Formation (Open File 1990-26).