The exact location of the St. Elmo occurrence is not known. The St. Elmo claims were reported to lie on the west side of the glacier, across from the Jutland showing (104A 046), at the head of the north fork of Bitter Creek (now Roosevelt Creek).
The area is underlain by northeast striking, southeast dipping argillites of the Middle Jurassic Salmon River Formation(?) (Hazelton Group). These rocks are intruded by grey-green, medium grained sill-like intrusions (Minister of Mines Annual Report 1947, page 91).
A mineralized fracture has been traced for about 150 metres in a bleached and pyritized zone, 3 to 6 metres wide. The vein strikes 070 degrees and dips steeply south. The vein is generally less than 5 centimetres wide, but is up to 0.3 metre wide where it crosses intrusive rocks. The vein comprises coarse-grained calcite, galena and sphalerite with minor quartz, tetrahedrite and chalcopyrite.
Two opencuts expose the upper and lower lenses in the vein. The old adit was driven in the upper lens and shows that the vein decreases from a maximum width of 0.3 metre to 1 centimetre in a length of 6 metres. The adit driven in 1947 was emplaced on the lower lens. A chip sample from the upper lens assayed 2972.6 grams per tonne silver, 8.3 per cent lead, 4.6 per cent zinc, 0.8 per cent copper and 0.69 gram per tonne gold across 18 centimetres (Minister of Mines Annual Report 1947, page 91).
The St. Elmo claims were owned by Cowan, McGinnis and Watkins in 1919. The latter also owned the nearby Jutland 2-3 claims. Little work was reported during 1919-20 but, evidently, a 6 metre long adit was driven at this time. In 1946, Cameron and Robichaud held the Bingo claim group in the area; the Bingo claims may have been a restaking of the St. Elmo claims. The following year the owners drove a short adit on the lower of two lenses and mined 14.5 tonnes of sorted ore. A shipment of 13.6 tonnes of ore was made that year; 57,354 grams of silver, 2374 kilograms of lead and 3101 kilograms of zinc were recovered. No further work has been reported on the occurrence.
During 2005 through 2010, Auramex completed programs of prospecting, geological mapping, geochemical sampling and airborne geophysical surveys on the area as the Bear River-Surprise Creek property.
