The Brett area is underlain by intermediate to acid volcanics of the Lower and Middle Jurassic Harrison Lake Formation. The volcanics are intruded by a Late Jurassic (Arthur, 1987) quartz diorite to monzonite stock, which forms the resistant peak and part of the east flank of Mount Klaudt. A linear feature, thought to be a fault, forms the east boundary of the intrusion and parallels the southern tributary of Brett Creek. East of this fault, rhyolite and rhyodacite, consisting of massive to pyroclastic (lapilli) beds have undergone pyritic and argillic alteration with some silicification. Numerous veins and shears in the rhyolite contain chalcopyrite, sphalerite, galena, barite and quartz. These stringers are found in an area about 1000 by 500 metres. The quartz-sulphide-barite veins range up to 15.2 centimetres in width.

Several rock chip samples were collected in 1981 and 1982. The strongly anomalous samples coincide with stringer zones containing sphalerite, galena, chalcopyrite and barite. Gold values in the rocks range between 1.0 to 115.0 grams per tonne and trace to 11.3 grams per tonne silver. Mean values in rocks are up to 0.06 per cent lead, 0.08 per cent zinc, 0.08 per cent copper and about 0.08 per cent barium. A sample taken from one of the mineralized veins analysed trace gold, 0.1 gram per tonne silver, 0.5 per cent zinc, 0.001 per cent lead, 0.15 per cent copper and 0.58 per cent barium (Assessment Report 10022).

In late 2002, the area was staked by Efrem Specogna. In 2004, the claims were optioned by Carat Exploration Inc and through 2007, programs of geological mapping, rock and stream sediment sampling, 347.2 line-kilometres of airborne geophysical surveys, and 2879 metres of diamond drilling in 10 holes on the Weaver Zone. Drilling intersected wide areas of locally strong hydrothermal alteration and associated stringer to locally semi-massive sulphides in a package of andesitic and dacitic volcanic rocks and interlayered sedimentary rocks. These stringer zones are predominantly made up of pyrite and chalcopyrite but locally contain notable amounts of sphalerite. Drilling intercepts included 2.7 per cent copper and 12.5 grams per tonne silver over 3.0 metres in hole WL06-02, 3.5 per cent copper with 0.3 per cent zinc over 2.3 metres, including 5.3 per cent copper, 0.41 per cent zinc and 24.8 grams per tonne silver over 1.5 metres in hole WL06-04 and 1.59 per cent zinc over 6.9 metres in hole WL06-05 (Allen, D.G. (2014-09-19): Technical Report on the Seneca VMS Project).