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TitreVolcanic, hydrothermal and structural controls on the nature and distribution of base and precious metals at the B26 project, Brouillan volcanic complex, Abitibi, Quebec
TéléchargerTéléchargement (publication entière)
AuteurFayard, Q; Mercier-Langevin, P; Daigneault, R; Perreault, S
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; par Rogers, N (éd.); Commission géologique du Canada, Dossier public 8358, 2018 p. 99-103, https://doi.org/10.4095/306440
Année2018
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/306440
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 1, Commission géologique du Canada, Dossier public 8358
Formatspdf
ProvinceQuébec
SNRC32E/10; 32E/15
Lat/Long OENS -79.0000 -78.7500 49.8833 49.7167
Sujetsgisements minéraux; prospection minière; potentiel minier; métaux de base; métaux précieux; or; zinc; argent; cuivre; gîtes volcanogènes; gisements filoniens; gîtes sulfureux; genèse des minerais; contrôles des minerais; contrôles structuraux; minéralisation; géologie du substratum rocheux; caractéristiques structurales; failles; plis; structures à diapirs; lithologie; roches ignées; roches intrusives; diabases; gabbros; roches volcaniques; basaltes; tufs volcaniques; rhyolites; andésites; couches volcano-sédimentaires; roches sédimentaires; argilites; ankérite; formations ferrifères; évolution tectonique; cadre tectonique; intrusions; filons; système hydrothermal; métamorphisme; déformation; schistosité; remobilisation; enrichissement des minéraux; altération; roches hôtes; analyses structurales; analyses texturales; analyses géométriques; zonation minéralogique; analyses de carottes de sondage; Archéen; Ceinture d'Abitibi Greenstone ; Mine Selbaie ; géologie économique; tectonique; géologie structurale; Précambrien
Illustrationslocation maps; geoscientific sketch maps; cross-sections; photographs
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeGestion de la connaissance de IGC, Initiative géoscientifique ciblée (IGC-5)
ProgrammeSystèmes aurifères, Initiative géoscientifique ciblée (IGC-5)
Diffusé2018 01 19
Résumé(disponible en anglais seulement)
The B26 project located in the northern Abitibi greenstone belt, a few kilometres south of the past producing Selbaie mine, consist of transposed, gold-rich chalcopyrite veins associated with porphyritic felsic volcanic rocks overlain by newly discovered lenses of semi-massive to massive, Zn-Ag-rich sulphide lenses higher up in the stratigraphy. Diffuse and remobilized Ag-rich zone are present in the hanging-wall rocks. The mineralized zones and host rocks have undergone major shortening, producing the steeply south-dipping S2 penetrative planar fabric. The mineralized zones have also been subjected to stretching, indicated by a well-developed 55-60° plunge towards the west on the schistosity. This deformation and the accompanying metamorphism are responsible for some remobilization. Although similar to other Archean volcanogenic massive sulphide deposits in terms of overall geometry, the B26 deposit is locally enriched in precious metals and shows a few unusual characteristics that suggest specific ore-forming conditions that may have played a role on the precious-metal budget and distribution.
GEOSCAN ID306440