The Great Ohio East (New Discovery) occurrence is located at an elevation of approximately 1700 metres on a steep north facing slope, southeast of Juniper Creek.

The area is underlain by porphyritic granodiorite of the Rocher Deboule stock which is one of the Late Cretaceous Bulkley Intrusions. The stock has been dated at 72 million years (Geological Survey of Canada Open File 2322). The stock intrudes hornfelsed sedimentary rocks of the Middle Jurassic to Lower Cretaceous Bowser Lake Group.

The mineralization is not described but is likely similar to that of the nearby Great Ohio (MINFILE 093M 069) occurrence and comprises a quartz vein or veins hosting variable amounts of chalcopyrite, galena, sphalerite, pyrrhotite, arsenopyrite and pyrite.

In 2007, a grab sample (RD07-005) assayed 20.50 per cent copper, 135 grams per tonne silver and 2.47 grams per tonne gold (Burgoyne, A.A., Kikauka, A. (2007-12-18): Technical Report on the Rocher Deboule Property).

Work History

During 2001 through 2007, Rocher Deboule Minerals Corporation completed programs of rock and soil sampling, prospecting, geological mapping and an airborne (electromagnetic, magnetic and radiometric) geophysical survey on the area as the Rocher Deboule property.

In 2012, American Manganese Inc. completed a minor program of rock and soil sampling on the area.

During 2016 through 2019, American Manganese Inc. completed further programs of geochemical (rock and soil) sampling and 10.2 line-kilometres of ground magnetic surveys on the area as the Rocher Deboule property.