The SB occurrence is located in the headwaters of Chipman Creek.

The area is underlain by metasedimentary rocks of the Mississippian to Pennsylvanian Fourth Lake Formation (Buttle Group) and volcanic rocks of the Upper Devonian McLaughlin Ridge Formation (Sicker Group). These two formations were historically referred to as the Myra Formation and contained the ‘Sediment-Sill Unit’ of the Sicker Group. The Sediment-Sill unit has been tentatively correlated with the Fourth Lake Formation and the ‘sills’ have been mapped separately. The sills are believed to be coeval with the Karmutsen Formation basalts and are informally named Mount Hall gabbro. These rocks have been intruded by granitic rocks of the Early to Middle Jurassic Island Plutonic Suite.

Locally, pyritic, graphitic argillite containing some silicification and disseminated pyrite hosts gold values.

In 1989, four rock outcrop samples (Rl to R4) assayed up to 9,780 parts per billion gold (sample R3). To the east, stream float samples of quartz containing pyrite, chalcopyrite and galena assayed up to 184,200 parts per billion gold (Assessment Report 18755).