At the Blackburn showing, a pyritic fracture zone, up to 4 metres wide, in grey, cherty limestone is reported "to contain several ounces of silver a ton" (Geological Survey of Canada Paper 45-9, page 18). Formerly part of the Carboniferous to Cretaceous Cache Creek Complex, the stratigraphy in this area has recently been reassigned to the Pennsylvanian to Permian Nina Creek Group (also formerly part of the Slide Mountain Group) (Ferri and Melville, Bulletin 91).

In 2015, 31 silt samples were collected on the Gaffney 1 and Gaffney 2 claims. No significant assay values were reported, and gold was found to have no outstanding correlation with pathfinder elements