The Cabin Silver occurrence is located approximately halfway along Birch Creek, northwest of the west end of Surprise Lake, about 15 kilometres northeast of the community of Atlin.
The showing occurs within mafic volcanic and ultramafic rocks of the Cache Creek Complex. Massive, dark green andesitic to basaltic flows of the upper Mississippian to Permian Nakina Formation occur with narrow bodies of variably altered upper Mississippian to Permian ultramafic rocks (Cache Creek Complex). This may represent sill-like bodies coeval with the mafic flows. The occurrence is very near the southern margin of the Middle Jurassic Three Sisters Plutonic Suite.
The showing comprises three quartz-calcite veins which are around 50 centimetres wide and have varying attitudes and are exposed in the bank of Birch Creek. One of the veins contains visible galena, chalcopyrite, pyrite, arsenopyrite and sphalerite. In 1984, one sample analyzed 538 grams per tonne silver, 0.96 per cent lead, 0.14 per cent zinc and 0.07 gram per tonne gold. A 20-centimetre vein sample yielded 1.37 grams per tonne gold (Assessment Report 13643).
The occurrence was discovered in 1984 during an exploration program conducted on behalf of Daiwan Engineering Ltd. The partial first-phase program consisted of airborne electromagnetic and magnetic surveying, reconnaissance soil sampling, mapping and prospecting, and trenching and rock sampling. In 1987, a limited ground magnetic and VLF electromagnetic survey (7 kilometres) was completed on behalf of the Surprise Lake Exploration Syndicate.
In 1993, a ground magnetometer survey (24 kilometres) was conducted on a part of the Julia West property for the Surprise Lake Exploration Limited Partnership.
In 2006 and 2007, Double Crown Ventures Ltd. completed programs of prospecting, soil sampling and ground geophysical surveys on the area as a part of the Surprise Lake property. In 2010, a computer-based structural analysis to satellite images of the property and nearby areas was completed on behalf of Double Crown Ventures Ltd.
