The Barb showing is located near the eastern margin of the Stikinia Terrane in south central British Columbia. The dominant rock types in the region are metabasalt, limestone and argillaceous metasediments of the Mississippian to Triassic Cache Creek Group. These are intruded by the dioritic to quartz dioritic Granite Mountain Pluton and the (?)Cretaceous Sheridan Creek Pluton. The Granite Mountain Pluton has been affected by regional metamorphism (greenschist facies) and deformation along with the enclosing Cache Creek Group.

The Barb showing consists of weak pyrite and chalcopyrite mineralization within both the Cache Creek Group rocks and felsic intrusives. The intrusive rocks are probably part of the Sheridan Creek pluton.