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TitleUranium-lead ages of Defeat granitoid rocks near the Con mine, Yellowknife, Northwest Territories; Radiogenic Age and Isotopic Studies: Report 15
AuthorMacLachlan, K; Davis, W J
SourceGeological Survey of Canada, Current Research (Online) no. 2002-F1, 2002, 9 pages, (Open Access)
LinksGSC Geochronology Laboratory home page
PublisherNatural Resources Canada
Mediapaper; on-line; digital; CD-ROM
RelatedThis publication is contained in Stern, R A; (2002). Radiogenic age and isotopic studies: Report 15, Geological Survey of Canada, Current Research (Online) no. 2002-F
File formatpdf
ProvinceNorthern offshore region
NTS85J/07; 85J/08
Lat/Long WENS-115.0000 -114.0000 62.5000 62.2500
Subjectsgeochronology; uranium lead dates; radiometric dates; analytical methods; radiometric dating; zircon; gold; mineral deposits; granitic rocks; deformation; mineralization; tonalites; analytical methods; Yellowknife Greenstone Belt; Defeat Plutonic Suite; Con Gold Mine
Illustrationsphotomicrographs; graphs; tables
Released2002 08 01
AbstractThe Yellowknife greenstone belt is located in the southern Slave Province, Northwest Territories, and hosts the Con and Giant lode-gold deposits. This paper reports the ages of two pre-D2 granitoid rocks of the Defeat plutonic suite from near the Con gold mine, selected to provide a maximum age for D2 deformation zones that are broadly contemporaneous with syn-D2 mineralization in the mine area. The Pud tonalite has a U-Pb age of 2632 ± 3 Ma, defined by both zircon and titanite, and a granitic dyke has a U-Pb zircon age of 2635 ± 4 Ma. These ages are the oldest yet determined for the Defeat plutonic suite.