The Discon showing is located 500 metres north of Highway 99 on the lower slopes of Mount Sproatt, and 8.5 kilometres west of Whistler.
The Discon showing was staked and explored in 1979 and 1981 by Crack Resources. In 1990, L. Demczuk staked the Les claims over the lapsed Discon claims.
The Discon showing occurs in the Pacific Ranges of the Coast Crystalline Belt. The area is underlain by Lower Cretaceous Gambier Group volcanic and sedimentary rocks of the Callaghan Creek roof pendant. This roof pendant hosts a number of sulphide occurrences with precious metals, including the former Northair producer (092JW 012).
The northwest and central portions of the Discon property are underlain by quartz diorite and diorite of the Coast Plutonic Complex. The diorite is fine to medium grained, grey-green, equigranular and occasionaly foliated. Minor porphyritic rhyodacite of the Tertiary to Quaternary Garibaldi Group were located in the northwest corner of the property. The rhyodacite is grey to tan, aphanitic to fine grained and equigranular containing phenocrysts of quartz, plagioclase, sanidine and biotite. The Gambier Group consists of an assemblage composed of greenstone, chlorite-muscovite schist, phyllite, argillite, limestone and pyroclastic rocks of dacitic to andesitic composition. Pyroclastic rocks include an andesitic agglomerate containing subangular to rounded fragments of porphyritic andesite, equigranular andesite, sandstone and equigranular dacite. All rocks except late stage siliceous dikes have been regionally metamorphosed to greenschist facies. Propylitic and sericitic alteration of hostrocks is common; in some areas secondary carbonate has been introduced. Sulphide-rich areas are mostly composed of quartz, pyrite, muscovite and minor chlorite. Silicification intensity decreases outward from complete replacement to fine veinlets and stringers.
Mineralization at the Discon showing is associated with shear zones in phyllitic argillite and intrusive rocks. Sulphides occur primarily in crosscutting veinlets or as massive sulphide zones. Shearing in phyllitic argillites contain pyrite, pyrrhotite, chalcopyrite, argentite, bornite, covellite with malachite and hydrozincite alteration . Sulphide-rich layers are intercalated with phyllite schist, in places forming laminae of chalcopyrite and pyrite. Mineralization has been found over widths of 2 to 3 metres in a 15-metre wide shear zone and exposed over at least 25 metres length. The zone strikes 320 degrees and dips steeply to the east.
A sample of sulphide-rich rock assayed 20.5 grams per tonne silver and 1.4 grams per tonne gold (Assessment Report 11127). Other chip samples averaged 46.5 grams per tonne silver, 3.1 per cent copper and 0.03 per cent molybdenum (Assessment Report 20627).
In 1990, 4 samples from a massive sulphide lens yielded anomalous copper and silver values. Grab sample 90T30 yielded 2.54 per cent copper and 31.7 grams per tonne silver from foliated greenstone with veining and trace sulphides (Assessment Report 20627). Grab sample 90T31 yielded 4.86 per cent copper and 64.3 grams per tonne silver from 1.2 metres of schist with quartz veining and trace chalcopyrite. Chip sample 90T32 over 1.5 metres yielded 7.27 per cent copper and 111.1 grams per tonne silver from schist and 5 per cent massive chalcopyrite. Chip sample 90T33 over 1.0 metre yielded 1.98 per cent copper and 19.6 grams per tonne silver from schist with quartz veining and 10 to 15 per cent massive chalcopyrite, azurite, malachite and argentite(?).
Sample 93-PL-03 yielded 4.52 per cent copper and 80.1 grams per tonne silver, extending the known strike length of mineralization (Assessment Report 22923).
