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TitleGeology of the Éléonore gold mine and adjacent gold showings, Superior Province, northern Quebec
DownloadDownload (whole publication)
AuthorFontaine, A; Dubé, B; Malo, M; McNicoll, V J; Prud'homme, N; Beausoleil, C; Goutier, J
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; by Rogers, N (ed.); Geological Survey of Canada, Open File 8358, 2018 p. 121-125, https://doi.org/10.4095/306444 (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
NTS33B/05; 33B/12; 33C/08; 33C/09
AreaEeyou Istchee Baie-James
Lat/Long WENS -76.2667 -75.7667 52.7500 52.5667
Subjectseconomic geology; tectonics; structural geology; mineral deposits; mineral exploration; mineral potential; gold; copper; silver; molybdenum; ore mineral genesis; ore controls; structural controls; mineralization; mineral assemblages; tin; bismuth; tungsten; tectonic setting; metamorphism; deformation; foliation; crenulations; cleavage; lineaments; alteration; albitization; silicification; arsenopyrite; pyrrhotite; loellingite; quartz; feldspar; pyrite; hydrothermal systems; replacement deposits; intrusions; veins; quartz veins; veinlets; stockworks; dykes; bedrock geology; structural features; faults; folds; bedding planes; lithology; metasedimentary rocks; turbidite sedimentation; breccias; igneous rocks; intrusive rocks; tonalites; granodiorites; pegmatites; diabases; diorites; volcanic rocks; pillow lavas; tuffs; sedimentary rocks; conglomerates; pelites; metamorphic rocks; paragneisses; amphibolites; schists; strain analysis; Archean; Superior Province; La Grande Subprovince; Éléonore Mine; Opatica Subprovince; Éléonore Property; Éléonore South Property; Cheechoo Property; Cheechoo Prospect; Moni Prospect; Low Formation; Ell Lake showing; ore systems approach; orogenic gold deposits; wackes; volcanites; Precambrian
Illustrationslocation maps; geoscientific sketch maps; photographs
ProgramKnowledge Management Coordination, Targeted Geoscience Initiative (TGI-5)
ProgramGold systems, Targeted Geoscience Initiative (TGI-5)
Released2018 01 19
AbstractLocated in the northeastern part of the Superior Province, the Éléonore mine had mineral reserves of 4.57 Moz (23.44 Mt at 6.07 g/t Au), measured and indicated gold mineral resources of 0.93 Moz (5.14 Mt at 5.66 g/t Au) and inferred mineral resources of 2.35 Moz (9.73 Mt at 7.52 g/t Au). Predominantly hosted by metamorphosed and deformed turbiditic rocks of the La Grande subprovince, the deposit is located 1.5 km south of the tectonometamorphic boundary with the Opinaca subprovince. Subparallel ore zones composed an envelope with a width of 70 to 80 m and vertical extension of >1.4 km. Associated with potassic, boron- and calcium-rich alteration assemblages and Au-As-Sb-Bi -W metallic signature, gold mineralization is associated with disseminations of arsenopyrite, pyrrhotite and löllingite. Various mineralization styles include veins and hydrothermal breccia, replacement zones, stockwork of quartz veins and veinlets composed of quartz, dravite, microcline, phlogopite, actinolite, diopside, hedenbergite, muscovite and schorl. Recent activities include field and underground mapping on the Éléonore, Éléonore South and Cheechoo properties. Gold mineralization also occurs within the Cheechoo tonalite/granodiorite, pegmatites and paragneiss (Cheechoo and Moni prospects). At Cheechoo and Moni, gold mineralization is structurally-controlled and associated with the presence of quartz-feldspar-(biotite-arsenopyrite-scheelite) sheeted veinlets in association with silicification albitization and 1 to 2% of arsenopyrite, pyrrhotite, pyrite and visible gold. This emerging gold district shares analogies with hypozonal orogenic gold deposits and reduced intrusion-related gold systems and illustrates the potential of an area affected by a high metamorphic gradient near a subprovince boundary.
GEOSCAN ID306444