The Whiting River showing area is regionally mapped as Paleocene to Eocene intrusions of the Hyder-Sloko Plutonic Suite. These intrusions may consist of granite, biotite leucogranite, quartz monzonite, granodiorite, subvolcanic stocks, dikes and sills.

A minor copper occurrence was located about 18 kilometres northwest of Whiting Lake by NRD Mining Ltd. in 1973. NRD reported that quartz veins and older quartz monzonite irregularly intruded a granodiorite. The granodiorite may be an older phase of the Sloko-Hyder intrusions or possibly related to Middle to Late Triassic age intrusions, known to occur in the region. Chalcopyrite was associated with the quartz veins and veinlets.