The Nic occurrence is underlain by weakly foliated granodiorite of the Jurassic to Tertiary Coast Plutonic Complex. Foliation trends 115 degrees and dips 75 degrees north.

Chalcopyrite, malachite, molybdenite, pyrite and hematite occur in quartz stringers within a 244 metre wide cataclastic zone. The quartz stringers trend 060 degrees. The cataclastic zone, which has been exposed for 400 metres, strikes 110 degrees. Within this zone, white and pink feldspathic fragments occur in a streaky chloritic matrix, and some chlorite is replaced by epidote.