The Fox showing is located between Gumas and Washout creeks, about 11.0 kilometres northeast of Alice Arm.
The region is underlain by an assemblage of volcanics and sediments comprising the Upper Triassic Stuhini Group and the Lower Jurassic Hazelton Group. This assemblage has been folded into a north-northwest trending anticline (Mount McGuire anticline) and regionally metamorphosed to greenschist facies.
The showing consists of a quartz-barite vein which has been traced west for about 183 metres in Hazelton Group porphyritic andesite. The vein is reported to contain irregular disseminations of sphalerite, pyrite and minor galena. A chip sample taken across 0.61 metre of the vein assayed trace gold, 6.8 grams per tonne silver, nil copper, trace lead and 5.1 per cent zinc (Minister of Mines Annual Report 1929, page 89).
In 1929, the vein was traced for about 183 metres by three opencuts in a westerly direction from an elevation of 487 to 529 metres.