The Redmac prospect is located 30 kilometres west of Invermere. The main showing is at 2320 metres elevation above sea level on the southwest bank of Red Line Creek in the Golden Mining Division.

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 claim group is underlain by argillite, siltstone and quartzite of the Devonian Mount Forster Formation which are in fault contact with upper dolomite and upper quartzite members of the Mount Nelson Formation and dolomite, siltstone and quartzite of the Horsethief Creek Group.

Several types of mineralization are documented for the Redmac, these include: 1) Galena and sphalerite occurring in 5 to 10 centimetre wide veins perpendicular to bedding in quartzite and siltstone of the 2) Sphalerite with minor galena in quartz-carbonate fractures in grey- blue dolomite of the Horsethief Creek Group. 3) Argentiferous galena and sphalerite veins associated with normal faults cutting cryptalgal dolomite of the upper dolomite member of the Mount Nelson Formation. 4) Galena with minor sphalerite in narrow discontinuous quartz veins within Mount Forster quartzite. 5) Sphalerite and galena in fractures in dolomitic quartzite of the Mount Forster Formation (Assessment Report 10167).

A total of five diamond-drill holes were drilled to evaluate the property in 1985. The best drill intersection assayed 0.23 per cent lead, 1.64 per cent zinc and 3 grams per tonne silver over an average width of 5.1 metres (Assessment Report 14114).