The Northwester (Magnet) occurrence is located 1.6 kilometres north of the head of Van Inlet, at an elevation of approximately 630 metres. Access is by tractor road and trail from Sheilds Bay on Rennell Sound.

Regionally, the area is underlain by basaltic volcanic rocks of the Upper Triassic Karmutsen Formation (Vancouver Group) and marine sedimentary rocks, including limestone, of the Upper Triassic Sadler Formation (Kunga Group), which are overlain by Middle Jurassic Yakoun Group andesites and volcanic sandstones. The volcanics and marine sedimentary rocks strike 60 degrees, dip steeply northwest and are cut by numerous andesite and basalt dikes. The dioritic Central Kano pluton of the Tertiary Kano Plutonic Suite outcrops to the south and west.

Locally, disseminated to massive magnetite with minor chalcopyrite mineralization occurs scattered over an approximately 3-metre wide and 450-metre long zone along the contact between greenstone and overlying limestone. Pods of massive magnetite and associated chalcopyrite, malachite and pyrrhotite occur mainly in the Karmutsen volcanics and within actinolite-garnet skarn.

In 1962, samples of high-grade float assayed up to 5.36 per cent copper, and a visual estimate of the no.2 trench was approximately 1 per cent copper over 2.7 metres (Property File - J.C. Stephen [1962-11-20]: Report - Prospecting - Queen Charlotte Project).

The showing was discovered and staked by G. McRae and A Dewall. The 11 claim Magnet group was optioned to Mastodon-Highland Bell Mines Limited. In 1962, the company carried out geological, magnetometer, and electromagnetic surveys.