The Brew occurrence outcrops along the Coquihalla Highway (Okanagan Connector), 1.0 to 2.2 kilometres west of the south end of Elkhart Lake and 49 to 50 kilometres north-northeast of Princeton.
This occurrence is hosted in volcanics and minor sediments of the Upper Triassic Nicola Group, 2.6 kilometres northwest of the Middle Jurassic Osprey Lake batholith. The volcanics consist primarily of andesite and fine-grained diorite. The contact between the two units is gradational, suggesting the diorite may be a subvolcanic equivalent of the andesite. Minor tuffs, lapilli tuffs, agglomerates, and feldspar porphyritic andesite are also present. The sediments consist of mudstone, siltstone, shale, and rare carbonate, intercalated with the pyroclastic units.
A major fault zone, the Brew fault, striking 140 degrees and dipping steeply southwest, is exposed along the Coquihalla Highway for 600 metres. The zone is approximately 40 metres wide. It is somewhat gossanous and exhibits carbonate and clay alteration and sporadic silicification. Some quartz +/- calcite stringers and blebs are present but not common. Pyrite is ubiquitous along the entire fault. Sections of the zone are strongly mineralized with massive veins, narrow stringers and occasional disseminations of marcasite, pyrite and pyrrhotite.
In 1988, samples of pyritic clay-altered sections have yielded up to 0.280 gram per tonne gold and 0.445 per cent arsenic (Assessment Report 18041, page 8, samples 128665, 44719). A sample from a zone of quartz stringers analysed 0.600 gram per tonne gold (sample 239716).
This fault is traversed by several significant fault/shear zones striking 100 to 120 degrees. One major crossfault, the Mugwump fault, is exposed west of the Brew fault, striking 100 degrees and dipping 60 degrees south. The zone has been traced on surface for 400 metres and is 30 to 40 centimetres wide. It is comprised of strongly gossanous clay and fault gouge containing 1 to 2 per cent pyrite. Quartz and quartz-calcite stringers and quartz blebs occur sporadically throughout the zone.
In 1988, a sample of quartz vein material yielded 0.14 gram per tonne gold and 14.4 grams per tonne silver (Assessment Report 18041, page 8, sample 239774).
Work History
In 1988, Kerr Addison Mines Ltd. completed a program of geological mapping and geochemical (rock, soil and heavy mineral) sampling on the area as the Wart 1-4 claims.
In 1989 and 1990, Minnova Inc. completed programs of geological mapping and geochemical (rock, soil and heavy minerals) sampling on the Wart claims.
In 2010, Victory Resources Corp. completed a photogeological structural (lineament) analysis program on the area as the Toni property. In 2015, a further program of photogeological structural (lineament) analysis and a 2.1 line-kilometre ground magnetic survey was completed on the area.