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TitleTemporal relationships between plutonism, metamorphism, and gold mineralization in southwestern New Brunswick: U-Pb and 40Ar/39Ar geochronological constraints
AuthorDavis, W J; Chi, G; Castonguay, S; McLeod, M
SourceGeological Survey of Canada, Current Research (Online) no. 2004-F2, 2004, 20 pages, (Open Access)
LinksGSC Geochronology Laboratory home page
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in Geological Survey of Canada; (2005). Current Research 2004, January-December 2004, Geological Survey of Canada, Current Research no. 2004, ed. version 2
File formatpdf
ProvinceNew Brunswick
NTS21G; 21H/04; 21H/05; 21H/12; 21H/13; 21I/04; 21J/01; 21J/02; 21J/03; 21J/04
AreaFredericton; St George; Woodstock; St Stephen; St Andrew
Lat/Long WENS-101.5000 -97.0000 57.5000 56.0000
Subjectsgeochronology; economic geology; igneous rocks; batholiths; plutonic rocks; granites; quartz veins; metamorphism; mineral occurrences; gold; mineralization; uranium lead dating; argon argon dating; radiometric dating; emplacement; Tower Hill Pluton; Jimmy Hill Granite; Clarence Stream Gold Deposit; Kedron Gold Occurrence; Jimmy Hill Gold Occurrence; plutonism; timing; Devonian; Paleozoic
Illustrationssketch maps; photographs; tables; Concordia diagrams; plots
Released2004 10 01
AbstractNew U-Pb and 40Ar/39Ar dates from plutonic rocks and quartz veins associated with gold occurrences in southwestern New Brunswick provide timing constraints for mineralization. Plutonic rocks spatially associated with economically significant gold mineralization are all Early Devonian, including a microgranite dyke near the Tower Hill pluton (409 ± 2.4 Ma), the Jimmy Hill granite (403 ± 2 Ma), and a
granitic dyke at the Clarence Stream main zone (395.5 ± 0.5 Ma). An auriferous pegmatite dyke at Clarence Stream has a maximum age of ~400Ma based on inherited zircon.Muscovite from quartz veins at the Clarence Stream main zone yields 40Ar/39Ar ages of 395.5 ± 3.6 Ma to 388.9 ± 3.6 Ma and provides minimum age estimates for gold mineralization. The close spatial and temporal association of gold mineralization with Devonian plutonism is consistent with a genetic link.