The area of the Lynn Creek zinc property is underlain by diorite of the Jurassic to Tertiary Coast Plutonic Complex which hosts a met- amorphic pendant of Jurassic to Cretaceous volcanic and sedimentary rocks of the Gambier Group (Geological Survey of Canada, Map 1152A).

Mineralization occurs in two areas, about 500 metres apart and 365 metres vertically, on Crown-granted lots 1609 (Kemptville Exten- sion) and 1633A (Evening Star). Access is subject to regulations of the North Vancouver Water District. In both places, the mineraliza- tion consists mainly of massive dark sphalerite, with smaller amounts of pyrrhotite, galena, chalcopyrite, pyrite, cubanite, marcasite and hematite. Gangue minerals include vuggy, coarse quartz, garnet and other skarn minerals.

The mineralization is classed as contact metamorphic, and is mainly restricted to limestone and calcareous sediments. The mineralized zones are located along favourable bedding planes and a series of shear zones and fissures. The strongest shears associated with the mineralization trend northwest. Local cross-faulting is intense, making it difficult to trace some of the mineralized zones.

Silver values are reported to vary from trace to 68.6 grams per tonne. Zinc values average about 9.0 per cent with higher grade ore averaging 20.0 per cent. In 1963, a feasibility study was carried out by Chapman, Wood and Griswold Ltd. and inferred ore reserves were estimated at 272,155 tonnes (Western Miner and Oil Review, November 1963, page 32). The grade is reported to be in the order of 20.0 per cent zinc (Northern Miner, November 31, 1963).