A lead-zinc occurrence (#243) is shown on Geological Survey of Canada Open File 2322 as being located on the west side of the Mount Thoen Mountain Range, 35 kilometres east-northeast of Hazelton.

The deposit is shown as a vein or fracture-related occurrence hosted in Late Cretaceous Bulkley Intrusions which are mainly granodiorite in composition. Biotite from the Mount Thoen Intrusion has been dated at 63 million years (Geological Survey of Canada Open File 2322). The intruded rocks are clastic sedimentary rocks of the Middle Jurassic to Lower Cretaceous Bowser Lake Group.