The area is underlain by metavolcanics and metasediments of the Devonian part of the Eagle Bay Formation. The rocks include sericite-quartz phyllite, chlorite-sericite-quartz schist and minor limestone. A foliated granitic sill cuts the schists, which are altered and silicified near the contact.

Galena, sphalerite and chalcopyrite occur in the altered rocks within 30 to 100 metres of the contact. Chalcopyrite is closely related to quartz vein material and copper values occur with a 1.2 to 1.8 metre wide elongated magnetite dike.