Sulphide mineralization is developed within the Gunsteel Formation, an Upper Devonian sequence of graphitic shales overlying Silurian calcareous siltstones of the Road River Group. The Gunsteel is part of the Upper Devonian to Mississippian Earn Group.

In 2009, prospecting by Canada Zinc Metals discovered the GPS bedded barite showing hosted in black shales, similar to those of the Gunsteel shale, located along the northwestern edges of the Akie property and directly along strike from the Cirque deposit to the north. Several target zones are located in the vicinity of the GPS Showing where a single drill hole was attempted in 2011 to test surface mineralization at depth but failed to reach the target depth. In 2013, 2 drill holes tested the down-dip extension of the GPS showing. These holes intersected black shale with minor nodular-to-laminar barite and bedded pyrite, along with narrow zones of anomalous zinc and lead.

See Akie (094F 031) for related geological and work history details.