The area is underlain by volcanic rocks of the Jurassic Hazel- ton Group. The Maple Leaf occurrence consists of two parallel shear zones, 87 metres apart, in andesite breccia. Small mineralized quartz stringers are contained within the shear zones which strike 095 degrees and dip 55 degrees northeasterly. Mineralization con- sisting of some sphalerite, pyrite, galena and freibergite is carried by the quartz stringers with minor associated rhodochrosite. A sel- ected sample gave an assay of 0.69 grams per tonne gold, 829.7 grams per tonne silver and 5.0 per cent zinc (Lay, 1937).