The North Arm occurrence is located on the northwest side of Canyon Creek, at an elevation of approximately 550 metres and 1.8 kilometres south west of the creek mouth on Neroutsos Inlet.

Regionally, northwest- striking, moderately west- dipping, calcareous sediments of the Parson Bay Formation overlie Karmutsen Formation tholeiitic basalts, both of the Upper Triassic Vancouver Group. These are overlain by Lower Jurassic Bonanza Group andesitic to rhyodacitic lava, tuff and breccia, which are coeval with, or genetically related to Early-Middle Jurassic Island Plutonic Suite granodiorite, occurring as small isolated plutons.

Locally, gossans and alteration zones host molybdenite and chalcopyrite mineralization.

In 1998, a chip sample assayed 1.11 per cent copper, 46.2 grams per tonne silver and 0.098 gram per tonne gold. A grab sample (1079) from the same zone assayed 3.54 per cent copper, 0.17 per cent zinc, 46.2 grams per tonne silver and 0.155 gram per tonne gold (Assessment Report 25797). Also at this time, a select grab sample, taken from a mineralized zone, located 150 metres to the southeast, assayed 0.23 per cent copper and 0.49 per cent molybdenum (Assessment Report 25797).

In 2015, a float sample (YRf-15-1) of chlorite-silica-altered porphyritic andesite hosting pyrite, sphalerite and galena from the occurrence area assayed 1.085 grams per tonne gold, 3.2 grams per tonne silver, 3.98 per cent zinc and 0.155 per cent copper, whereas two other float samples (YRf-15-3 and -16) of rhyolite and volcanic tuff yielded values of up to 0.267 per cent copper and 0.012 per cent molybdenum (Assessment Report 36110).

Work History

The area has been explored in conjunction with the Yreka (MINFILE 092L 052) mine and was first staked in 1898. In 1970 and 1971, Green Eagle Mines completed programs of airborne electromagnetic and magnetic geophysical surveys, rock and soil sampling and ground magnetic survey on the area. In 1972, Iso Explorations completed a program of ground geophysical surveys, geological mapping and soil sampling. In 1998 and 199, Talltree Resources completed programs of rock and soil sampling, geological mapping and a ground electromagnetic survey on the area. During 2015 through 2019, Karmamount Mineral Exploration Inc. completed minor programs of geological mapping and geochemical (rock and soil) and biogeochemical sampling and a 12.9 line-kilometre induced polarization survey on the area as the Yreka property.