GEOSCAN, résultats de la recherche


TitreA geological, petrological, and geochronological study of the Grey Gabbro unit of the Podolsky Cu-(Ni)-PGE deposit, Sudbury, Ontario, with a focus on the alteration related to the formation of sharp-walled chalcopyrite veins
TéléchargerTéléchargement (publication entière)
AuteurKontak, D J; MacInnis, L M; Ames, D E; Rayner, N M; Joyce, N
SourceTargeted Geoscience Initiative 4: Canadian nickel-copper-platinum group elements-chromium ore systems -- fertility, pathfinders, new and revised models; par Ames, D E (éd.); Houlé, M G (éd.); Commission géologique du Canada, Dossier public 7856, 2015 p. 287-301,
ÉditeurRessources naturelles Canada
Documentdossier public
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Ames, D E; Houlé, M G; (2015). Targeted Geoscience Initiative 4: Canadian nickel-copper-platinum group elements-chromium ore systems -- fertility, pathfinders, new and revised models, Commission géologique du Canada, Dossier public 7856
Lat/Long OENS -82.0000 -80.0000 47.0000 46.0000
Sujetsétablissement de modèles; nickel; platine; chrome; genèse des minerais; métallogénie; altération; chalcopyrite; sulfures; minéralisation; cuivre; datations argon-argon; datations au zircon; datations au uranium-plomb; gabbros; études des isotopes stables; rapports rubidium strontium; altération hydrothermale; datations au plomb-plomb; analyses pétrographiques; Dépôt de Podolsky ; Province de Superior ; Complexe de Sudbury Igneous ; minéraux métalliques; pétrologie ignée et métamorphique; géochronologie
ProgrammeÉtude des gîtes magmatiques de Ni-Cu-EPG, Initiative géoscientifique ciblée (IGC-4)
Diffusé2015 06 22
Résumé(disponible en anglais seulement)
The Canadian Ni-Cu-PGE-Cr ore systems project, under the fourth phase of the Targeted Geoscience Initiative (TGI-4), spanned a breadth of ore deposit types, tectonic environments (crustal boundaries, suprasubduction zones, astrobleme, intracratonic rift), and processes of formation (magmatic to hydrothermal). This report summarizes key project activities for six mineral districts completed by a collaborative group of more than fifty contributors from the GSC, four provincial geological surveys, academia, and industry to develop and refine genetic models and exploration techniques to determine fertility and pathfinders. Sixty-six new age determinations provide important geochronological constraints to build and refine models for many Cr-(PGE), Ni-Cu-PGE, Cu-PGE, and Fe-Ti-V-(P) prospective and fertile regions. These include Ni-Cu-PGE in convergent-margin settings, Cr in the Bird River and McFaulds Lake ("Ring of Fire") greenstone belts, Cr in La Grande Rivière-Eastmain domains, Cu-PGE in Midcontinent Rift, and Ni-Cu-PGE in the enormous Sudbury mining district. New exploration techniques to detect fertility using advanced mineral chemical microanalytical techniques and discriminant diagrams were developed for oxide phases (chromite, magnetite) in barren and fertile intrusions through examination of Canada's districts (Sudbury Igneous Complex, Ontario; Voisey's Bay, Labrador and Newfoundland) and Archean komatiite (Alexo, Abitibi). The first in situ determination of actual ore-metal concentrations from an early trapped melt hosting a major mining district was completed. Various new indicator minerals and assemblages, such as apatite, biotite, and epidote-amphibole-titanite assemblages, were identified with distinctive chemistry to aid in vectoring towards buried Ni-Cu-PGE and Cu-PGE mineralization.