The area of the Burnt occurrence is underlain by siltstone and wacke of the Middle Proterozoic (lower) Aldridge Formation of the Purcell Supergroup. Cretaceous intrusions consisting of granite, granodiorite and monzonite intrude the strata. Pyrite, chalcopyrite and pyrrhotite occur in narrow discontinuous veins and lenses in a small shear zone in quartzite, near meta diorite. A 5-metre adit exposes the shear which strikes 080 degrees and dips 37 degrees south.