The area is underlain by Upper Triassic Quatsino Formation (Vancouver Group) limestone intruded to the east by a small plug of quartz monzonite-granodiorite.

The Oke occurrence is underlain by Quatsino Formation limestone intruded by mafic dykes that are generally parallel to the contact with a small quartz monzonite intrusion to the east. The dykes have been sheared, altered, mineralized and faulted. Chalcopyrite and sphalerite occur in quartz veinlets in dyke rock and with pyrite and minor galena in the adjacent limestone. A short distance east, an irregular mafic dyke trending 340 degrees either turns abruptly or is cut by another dyke trending 080 degrees. The first segment and flanking limestone are mineralized with chalcopyrite, and the second segment with chalcopyrite, sphalerite and tetrahedrite. Three hundred metres to the north of a short adit at the Oke showing, a few parallel quartz veins with some dyke material cut limestone. One quartz vein is 20 to 25 centimetres wide and is impregnated with galena, chalcopyrite and rare native gold and silver.