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TitleControls on the distribution, style, composition and timing of the gold-bearing mineralized zones of the Horne 5 deposit, Abitibi Greenstone Belt, Quebec
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AuthorKrushnisky, A; Mercier-Langevin, P; Ross, P -S; Goutier, J; McNicoll, V J; Moore, L; Pilote, C; Bernier, C
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; by Rogers, N (ed.); Geological Survey of Canada, Open File 8358, 2018 p. 95-98, https://doi.org/10.4095/306439 (Open Access)
Year2018
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 1, Geological Survey of Canada, Open File 8358
File formatpdf
ProvinceQuebec
NTS32D/02; 32D/03; 32D/06; 32D/07
AreaRouyn-Noranda; Lake Osisko; Noranda Lake
Lat/Long WENS -79.0531 -78.9933 48.2622 48.2361
Subjectseconomic geology; tectonics; structural geology; mineral deposits; mineral exploration; mineral potential; gold; silver; volcanogenic deposits; sulphide deposits; ore mineral genesis; ore controls; structural controls; mineralization; bedrock geology; structural features; faults; lithology; igneous rocks; felsic volcanic rocks; volcaniclastics; rhyolites; andesites; intrusive rocks; syenites; trondhjemites; tonalites; diabases; intrusions; mineral assemblages; clasts; sulphides; electrum; tectonic history; metamorphism; deformation; remobilization; recrystallization; replacement deposits; host rocks; permeability; marine environments; drill core analyses; Archean; Abitibi Greenstone Belt; Horne 5 Deposit; Blake River Group; Horne Creek Fault; Andesite Fault; Chadbourne Deposit; ore systems approach; volcanogenic massive sulphide deposits (VMS); Precambrian; Proterozoic
Illustrationsgeoscientific sketch maps; photographs; photomicrographs
ProgramKnowledge Management Coordination, Targeted Geoscience Initiative (TGI-5)
ProgramGold systems, Targeted Geoscience Initiative (TGI-5)
Released2018 01 19
AbstractThe gold-bearing Horne 5 VMS deposit is located in the Archean Blake River Group of the Abitibi greenstone belt. Hosted within steeply-dipping, north-facing felsic volcaniclastic units, the deposit is fault-bounded and within the boundaries of the Horne block. Mineralization consists of a series of stacked massive to semi-massive sulphide lenses alternating with disseminated and stringer sulphide zones in coarse felsic volcaniclastic units which often contain massive sulphide clasts. Results from this study show: i) gold and silver are associated with a sulphide assemblage composed dominantly of pyrite and lesser sphalerite, chalcopyrite and magnetite; ii) gold appears to be hosted in sulphide grains and electrum was only rarely observed as tiny blebs associated with remobilized chalcopyrite and near recrystallized pyrite grains, suggesting local remobilization due to metamorphism and deformation; iii) gold-bearing mineralization is partly controlled by the primary permeability of the host volcanic units and formed mostly by replacement of the host rocks under the paleo-seafloor. The Horne 5 deposit represents an opportunity to better understand ore-forming processes in large Archean synvolcanic gold systems.
GEOSCAN ID306439