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TitreInsights into the timing of mineralization and metamorphism in the North Caribou greenstone belt, western Superior Province
TéléchargerTéléchargement (publication entière)
AuteurKelly, C J; Schneider, D A
SourceTargeted Geoscience Initiative 4: Contributions to the understanding of Precambrian lode gold deposits and implications for exploration; par Dubé, B (éd.); Mercier-Langevin, P (éd.); Commission géologique du Canada, Dossier public 7852, 2015 p. 245-253, https://doi.org/10.4095/296645
Année2015
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/296645
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Dubé, B; Mercier-Langevin, P; (2015). Targeted Geoscience Initiative 4: Contributions to the understanding of Precambrian lode gold deposits and implications for exploration, Commission géologique du Canada, Dossier public 7852
Formatspdf
ProvinceOntario
SNRC52O; 53B
Lat/Long OENS -92.0000 -90.0000 53.0000 51.0000
SujetsArchéen; or; minéralisation; gîtes minéralogiques; métamorphisme; ceintures de roche verte; analyses spectrométriques; Province de Superior ; géologie économique; géochronologie; Précambrien
Illustrationstables; plots
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeÉtude des gîtes d'or, Initiative géoscientifique ciblée (IGC-4)
Diffusé2015 06 11
Résumé(disponible en anglais seulement)
Secondary ion mass spectrometry (SIMS) U-Pb depth profiles of unpolished detrital zircon were used in an attempt to resolve the timing of metamorphism and mineralization in the North Caribou greenstone belt of northern Ontario, which hosts the Musselwhite gold mine. Eleven samples located 10-75 km from the mine site were collected from metasedimentary rocks adjacent to structures that may have promoted hydrothermal fluid flow. Zircon rim material is commonly characterized by decreased Th/U concentrations (up to an order of magnitude), as well as generally possessing concordant ages. Rim ages obtained via this technique range from 2788-2703 Ma, up to 250 m.y. younger than zircon cores. The timing of zircon rim recrystallization overlaps with the timing of potassic alteration in the surrounding plutons, as well as regional gold mineralization in the North Caribou Superterrane. These zircon rims may represent the timing and potential distribution of Au-bearing fluids within and regional to the Musselwhite deposit.
GEOSCAN ID296645