The Logan prospect lies in the headwaters of Norrish Creek, 4.5 kilometres southeast of the south end of Dickson Lake.

The area is underlain by a small roof pendant of rhyolitic to andesitic flows, tuffs and breccias of the Middle Jurassic Harrison Lake Formation. The pendant is enclosed by medium grained Late Jurassic granodiorite of the Jurassic to Tertiary Coast Plutonic Complex.

A quartz vein stockwork is hosted in quartz-sericite-pyrite altered dacitic tuff and breccia over a 400 by 230 metre area. A zone of quartz-chlorite-pyrite alteration is developed peripheral to the stockwork in various other flows and pyroclastics. Pyrite, pyrrhotite, chalcopyrite, sphalerite, native bismuth, magnetite and hematite occur in the stockwork and to a lesser extent in the enclosing host rock. Various grab samples assayed up to 3.31 per cent copper, 1.39 per cent zinc and 0.03 per cent bismuth (Assessment Report 6366, page 10). One drill hole section assayed 0.53 per cent copper between 29.9 and 34.6 metres depth (Assessment Report 6366, page 10).

The deposit was evaluated by various operators searching for Kuroko-type massive sulphides between 1969 and 1980.