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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
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
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, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative: 2017 report of activities, volume 1
File formatpdf
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; Precambrian; Proterozoic
Illustrationsgeoscientific sketch maps; photographs; photomicrographs
ProgramTargeted Geoscience Initiative (TGI-5) Knowledge Management Coordination
ProgramTargeted Geoscience Initiative (TGI-5) Gold systems
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.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is directed towards providing next generation knowledge and methods to facilitate more effective targeting of buried mineral deposits. The program aims to enhance the effectiveness of exploration for Canada¿s major mineral systems by resolving foundational geoscience problems that constrain the geological processes responsible for the liberation metals from their source region, transportation of these ore metals and control their eventual deposition. TGI supports projects on gold, Ni-Cr-PGE, porphyry-style mineralization, uranium and volcanic- and sedimentary-hosted base metal mineralization ore systems, with each project divided into subprojects focused on resolving specific knowledge gaps by integrating data and studies from multiple sites across Canada. Herein, we present interim results and interpretations from a selection of the research activities currently being conducted under the auspices of TGI.

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