The Maple property is situated on the southwest bank of Red Line Creek in the Golden Mining Division at 2134 metres elevation above sea level.

Regionally, the area is underlain by Proterozoic clastic sedimentary rocks of the Purcell and Windermere supergroups and by lower Paleozoic strata of the Beaverfoot and Mount Forster formations (Geoscience Map 1995-1).

The Purcell Supergroup strata include the Aldridge, Creston, Kitchener, Dutch Creek and Mount Nelson formations. The Windermere Supergroup unconformably overlies the Purcell Supergroup rocks and includes the Toby Formation and Horsethief Creek Group (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. The Van Creek Formation correlates with the Lower Kitchener Formation while the Gateway Formation is equivalent to the lower portion of the Dutch Creek Formation. The Mount Nelson Formation has been subdivided into seven discrete members, a lower quartzite, a lower dolomite, a middle dolomite, a purple dolomite, an upper middle dolomite, an upper quartzite, and an upper dolomite (Open File 1990-26).

Rocks of the Horsethief Creek Group, Beaverfoot and Mount Forster formations are folded and overthrusted by rocks of the upper portion of the Dutch Creek Formation and the lower members of the Mount Nelson Formation. The sedimentary rocks have undergone regional metamorphism to at least greenschist facies.

The prospect consists of a single adit driven for 80 metres along a narrow fault that marks the contact between dolomitized limestone of the middle dolomite member of the Mount Nelson Formation and quartzite of the Toby Formation (Open File 1990-26). Mineralization consisting of galena and sphalerite is hosted in 5 to 30 centimetres wide quartz veins. The sulphide minerals occur as massive lenses 1 to 2 metres long where the fault zone is pyritized and the wallrocks are strongly oxidized (Assessment Report 11739).

Limited mining from the prospect in 1915 and 1925 produced 26 tonnes of high-grade material which yielded 25,878 grams of silver and 8256 kilograms of lead.