The Dary prospect is at 610 metres elevation on the east side of Duncan Lake. The main showings are south of Reno Creek and north of Cockle Point. The property extends across the map boundary into NTS area 082K/10.
The showings east of Duncan Lake were first described in the 1920s, at which time there were three short adits driven along galena and sphalerite-bearing quartz veins. However, little work was done until 1945, when the Tin City Group was staked over a tin showing that contained some scheelite. The area was restaked and explored by Sipald Resources Limited in 1983 and optioned to Newmont Exploration Limited the same year. The latter mapped the area and conducted soil and heavy-mineral geochemical surveys the following year. During 2007 through 2009, Braveheart Resources Canada Inc. completed programs of prospecting and geochemical (soil and rock) sampling on the area. In 2011, the area was examined by Moose Mountain Technical Services on the behalf of Rainbow Resources Inc. as the Big Strike property.
The Trout Lake area is underlain by a thick succession of sedimentary and volcanic rocks of the Badshot Formation and Lardeau Group near the northern end of the Kootenay arc, an arcuate, north to northwest trending belt of Paleozoic and Mesozoic strata that is now classified as a distinct, pericratonic, terrane. The arc rocks are bordered by Precambrian quartzite in the east and they young to the west, where they are bounded by Jurassic-age intrusive complexes. They were deformed during the Antler orogeny in Devonian-Mississippian time and were refolded and faulted during the Columbian orogeny, in the Middle Jurassic. A large panel, the "Selkirk allochthon", was later offset to the northeast by dip-slip motion along the Columbia River fault. The showing is on the east side of the allochthon.
The Badshot Formation is composed of a thick Cambrian limestone that is a distinctive marker horizon in the Trout Lake area. It is underlain by Hamill and Horsethief Chief Group quartzite and it is overlain by a younger assemblage of limestone, calcareous, graphitic and siliceous argillite and siltstone, sandstone, quartzite and conglomerate, and also mafic volcanic flows, tuffs and breccias, all of which belong to the Lardeau Group. The rocks are isoclinally folded and intensely deformed, but only weakly metamorphosed.
The Dary prospect area is underlain by a thick amphibolite unit intercalated with limestone and quartzite of the Upper Proterozoic Horsethief Creek Group. The amphibolite body appears to be a concordant, foliated, metagabbro intrusion intruded into calc-silicate altered limestone. There is a strong spatial association between the tungsten mineralization and amphibolite, and there are two significant showings. Fine to coarse-grained scheelite occurs as disseminations with tourmaline in skarn-altered limestone. Scheelite also occurs in veinlets with quartz, feldspar and/or sericite, and tourmaline, cutting the amphibolite. Assays of up to 1.12 per cent tungsten trioxide are reported over 2 metres.
