The Magnet occurrence is located near the eastern shore of Nimpkish Lake, approximately 1 kilometre southeast of the Halfway Islands.
The area is underlain by volcanics and sediments of the Upper Triassic Karmutsen, Quatsino and Parson Bay formations (Vancouver Group) and by volcanics of the Lower Jurassic Bonanza Group. These rocks have been intruded by granodiorite of the Jurassic Island Plutonic Suite.
Locally, Karmutsen volcanics are overlain by a flat-lying remnant of Quatsino limestone. To the southeast these rocks are intruded by granodiorite. Along or near the contact with the granodiorite and near the limestone-volcanic contact, massive magnetite bodies are associated with diopside-grossularite-epidote skarns. Veins and disseminations of pyrite, pyrrhotite and chalcopyrite occur in the magnetite bodies and the skarns. The skarn zone varies from 0.5 to greater than 10 metres in width with chalcopyrite-pyrite veins up to 1.5 metres in width.
In 1972, a chip sample across a 1.5-metre chalcopyrite-pyrite vein assayed 15.4 per cent copper (Assessment Report 4447).
Work History
In 1952 and 1953, Noranda Mining and Exploration completed a program of trenching, geological mapping and a ground magnetometer survey on the area as the Magnet claims. In 1972, First National Uranium Mines completed a program of geological mapping, soil sampling and a ground magnetometer survey on the area as the Excel and Excelsior claims. In 1973, Groundstar Resources completed programs ground geophysical surveys. In 1982 and 1984, Mintek Resources completed programs of soil sampling and ground and airborne geophysical surveys on the area as the Nimp Group. In 1988, Industrial Filler Ltd. completed two diamond drill holes, totalling 300.0 metres, on the area as the Tsulton claims. In 2000 and 2001, Homegold Resources completed a program of geological mapping and two diamond drill holes, totalling 51.8 metres, on the area as the Smiley 1-6 claims. During 2013 through 2016, Graymont Western Canada Inc. completed programs of rock sampling and ground magnetic surveys on the area as part of the Nimpkish property.