ABSTRACT
The Wrightbar gold mine, located in the southern part of the Abitibi Greenstone Belt Canada, is enclosed within an E-W trending, south-verging thrust faults separating the Bourlamaque Granodiorite batholith (BGB) (hangingwall) from volcanic rocks of the Val d’Or formation (footwall). Gold mineralization is associated with polyphased quartz/tourmaline shear veins hosted by metric-wide shear zones (SZ). During their growth, the quartz veins were associated with the development of hydrothermal alteration halos, that are characterized by an early synkinematic tourmaline-rich hydrothermal stage followed by a late to post-shearing carbonate/chlorite/ talc-rich stage. Sulfides have precipited during the progressive tectonic activity, but native gold was only deposited during a postkinematic chalcopyrite-rich episode.
