Mount Colin mine, Mary Kathleen district, Rosebud Station, Cloncurry Shire, Queensland, Australiai

Regional Level Types
Mount Colin mine	Mine
Mary Kathleen district	Mining District
Rosebud Station	Station (farming)
Cloncurry Shire	Shire
Queensland	State
Australia	Country

Shear-hosted copper deposit.
The Mount Colin Cu-Au deposit is located on the eastern limb of the Mary Kathleen Syncline and sits approximately 300 m southwest from the exposed contact of the Corella Formation and the Burstall Granite. The deposit is situated within the NW-striking Mount Colin Fault. The top ~400 m of the deposit is hosted within the Corella Formation, which is intruded by the Burstall Granite at depth and to the east of the deposit at surface. There is approximately 30 m of displacement along the Mount Colin Fault in the southeast portion of the deposit associated with dip-slip dilation. Adjacent to the deposit, the Burstall Granite and Corella Formation host rocks have been overprinted by Na-Ca alteration and a Ca-Mg-Fe skarn assemblage.
The top 12–14 m of the deposit consists of oxidized material in the form of clays and siliceous gossans with limonitic botryoidal silica, malachite, azurite, and rare native Cu . The oxidized zone transitions into the supergene enriched portion of the deposit that contains native Cu, limonite, chalcocite, and oxidized chalcopyrite. From a depth of 90–170 m, the deposit is dominated by a collapse breccia termed the “void zone”. The collapse breccia is interpreted to have formed via weathering-related dissolution of the primary calcite. Primary Cu-Au mineralization occurs from a depth of 170 m to >450 m within the Mount Colin Fault.