Content Image

Doyon Division Gold Mines, Québec

Geology & Mineralization


The Doyon Division lies in the southern portion of the Archean Abitibi volcanic belt within the Bousquet Formation of the Blake River Group (“BRG”), otherwise known as the Cadillac-Bousquet gold belt in the Abitibi region of Québec. The stratigraphy trends east-west and dips steeply to the south. The BRG is overlain to the north by sedimentary rocks of the Kewagama Group and overlies sedimentary rocks of the Cadillac Group to the south. The contacts between the BRG and the adjacent sedimentary groups are characterised by extensive zones of deformation.

The Cadillac-Bousquet belt is one of the largest gold producing districts of the Abitibi greenstone belt, Québec’s most productive metal mining region. The belt hosts several large deposits including La Ronde, Bousquet 2, Bousquet 1, Doyon and Mouska. These deposits lie within the intensely altered and deformed corridor of the BRG known as the Doyon-Dumagami deformation zone. Current reserves and resources combined with historical production from these mines exceed 21 million ounces of gold.


The Doyon gold deposit is dominated by vein-type mineralization, with the main mineralized veins averaging several centimetres in thickness. Vein assemblages typically comprise varying proportions of pyrite, quartz, chalcopyrite, carbonate and gold.

The deposit can be divided into three parts: Zone 1, Zone 2 and West Zone. Zones 1 and 2 occur exclusively within volcanic rocks whereas West Zone mineralization is hosted by the Mooshla intrusive.

The Mouska Gold Mine lies in the southern part of the Abitibi subprovince, in the Bousquet Township. It is hosted by volcanic and plutonic rocks of the BRG. Volcanic rocks dominate and areprimarily basaltic to andesitic in composition. The Mouska deposit is classified as an orogenic lode-type deposit. Economic mineralization is associated with laterally and vertically continuous narrow quartz veins of less than one metre in thickness. Veins strike ESE, dip subvertically and contain 5-15% pyrite-pyrrhotite and 5-10% chalcopyrite.

Economic lenses occur in andesitic volcanics and in the Mooshla intrusive, which occupies the southeastern third of the property. The intrusive hosts the current known reserves and has the best potential for resource expansion.