The PDQ occurrence is located at the southern end of the Buttle Lake uplift in an area underlain by volcanic rocks of the Paleozoic Sicker Group. See H-W (092F 330) for a discussion of the strata- graphic and nomenclature revisions for the uplift.

The volcanics have been intruded by andesite and quartz diorite dykes that may be related to a large granodiorite batholith of the Early to Middle Jurassic Island Plutonic Suite, located about 4 kilo- metres to the southwest. The occurrence comprises two parallel quartz veins.

The Number 1 vein strikes 020 degrees and dips 70 to 85 degrees west. The vein has been traced intermittently for over 200 metres, cutting andesite flows, quartz diorite and andesite dykes. Part of the vein traces a fault zone that is also occupied by a quartz diorite dyke. The fault zone is 10 to 50 centimetres wide, and the vein occupies about one half of this width in altered wall rock fragments and gouge. Vein materials consist of quartz, carbonate, pyrite, chalcopyrite, sphalerite and galena. Greenish and yellow oxidation suggests the alteration of arsenic and antimony-bearing sulphides. A 45.7 centimetre sample taken across the vein assayed 63.09 grams per tonne gold and 89.15 grams per tonne silver (Bulletin 13, page 97).

The Number 2 vein is located 250 metres east of the Number 1 vein and is hosted by similar rocks. This vein strikes 020 to 030 degrees and dips 60 to 70 degrees northwest, and has been traced for 100 metres. The vein is 20 to 61 centimetres wide and contains rusty quartz, wall rock fragments and lenses of pyrrhotite, pyrite, chalco- pyrite, sphalerite and galena which are concentrated along the vein walls. A sample taken across 38.1 centimetres of the Number 2 vein assayed 32.23 grams per tonne gold, 144.02 grams per tonne silver and 1.4 per cent lead (Bulletin 13, page 97).