The Eel occurrence is located between the head waters of St. Mary River and Dewar Creek and approximately

The area is underlain by granodioritic intrusive rocks of the Cretaceous Fry Creek Batholith. Sedimentary and carbonate rocks of the Middle Proterozoic Dutch Creek, Mount Nelson and Kitchener formations (Purcell Supergroup) outcrop to the east and north.

Locally, molybdenum mineralization with associated pyrite and marcasite occurs in fractures and quartz veins along the edge of the Cretaceous Fry Creek Batholith. The intrusive rocks range from granite to granodiorite to monzonite. A siltstone, argillite, quartzite and dolomite unit of the Middle Proteozoic Dutch Creek Formation (Purcell Supergroup) is in contact with the batholith at or near the mineralized locality.

Disseminated chalcopyrite and copper oxides are reported on the ridge immediately to the south east, while quartz-carbonate veins with sphalerite and chalcopyrite are reported on a ridge approximately 4 kilometres to the south east, near Mount Gill.

In 2011, Teck Resources completed a program of geological mapping on the area as the Kaslo property.