The SB 78 showing is located at the headwaters of Whitewater Creek, approximately 1.5 kilometres southwest of Whitewater Mountain. New Denver, British Columbia lies some 19 kilometres to the southwest.
The main lithologies of the area are assigned to the Permian Kaslo Group, consisting of andesite flows and pyroclastics (greenstone), and tuffaceous sediments. Volcanics are extensively chlorite altered and schistose. Sediments and volcanics have been locally intruded by diorite and feldspar porphyry dikes and sills. Serpentinite is the most extensive rock type exposed in this area, forming northwesterly trending bands with steep southwest dips and extending up to 750 metres in width. Talc and asbestos are common alteration minerals associated with this serpentinite unit. The contact between the serpentinite and surrounding lithologies is faulted. The surface trace of this fault can be traced for several kilometres. Underground, this fault is marked by a heavy talc gouge.
The showing is underlain by sheared and highly serpentinized peridotite. Mineralization consists of massive pods of pyrrhotite, pentlandite and garnierite (Ni-silicate) along a shear zone in a serpentinite body roughly 75 metres long.
A drill program in 1971 completed 11 holes totalling 607 metres. Drilling intersected a shear zone at 49 metres depth containing disseminated sulphides. The best assay yielded 0.26 per cent nickel over 1.5 metres (Assessment Report 3225). Two surface channel samples yielded up to 5 per cent nickel over 2.4 to 3.6 metres width (Assessment Report 3225). A ground magnetometer survey of this serpentinite body revealed 7 additional anomalies.