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7466178 
Journal Article 
Footprint of the Canadian malartic gold deposit, QC, Canada: preliminary evaluation of mafic dyke alteration 
Vaillant, M; Barnes, SJ; Fiorentini, ML; Santaguida, F; Tormanen, T; Perrouty, S; Linnen, RL; Lypaczewski, P; Gaillard, N; Olivo, GR; Lesher, CM; Piette-Lauziere, N; Crocker, M; Piercey, S; El Goumi, N; Enkin, R; Bouchard, F 
2015 
n/a 
1-5 
189-191 
English 
The Pontiac Group meta-sedimentary rocks that host the Canadian Malartic gold deposit were intruded by numerous mafic dykes before the mineralization event(s). The mafic rocks were more reactive to hydrothermal fluids than the Pontiac sediments, which allows for a better characterization of fluid-rock interactions. A preliminary alteration halo of the Canadian Malartic deposit has been interpreted based on the alteration of the mafic dykes. Mineralogy evolves progressively from a distal amphibole-rich assemblage to a proximal (< 0.3 km) amphibole-biotite-quartz-chlorite-pyrite-carbonate mineral association. Petrophysical properties and geochemical signatures co-vary with the mineralogical observations and indicate a decrease in density (silica and carbonate alteration) and an increase in K2O (potassic alteration) with decreasing distance from the deposit. Mineralogical, geochemical, petrophysical and hyperspectral data aid in distinguishing the alteration features (e.g., potassic alteration) and provide a combination of tools that can be used to define the alteration halos of similar systems. 
Deposit footprints; Distal alteration; Gold 
13th SGA Biennial Meeting on Mineral Resources in a Sustainable World 
Nancy, France 
Aug. 24-27, 2015