U-Pb ages of syndeformational dykes associated with the Mesoproterozoic Nain Plutonic Suite, Labrador

• Published in: Canadian Journal of Earth Sciences
• Main Authors: Cadman, Andrew C, Noble, Steve R, Tarney, John, Park, R Graham, Ryan, A Bruce, Royse, Kate R
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1999
• Subjects: General Earth and Planetary Sciences; Nain
• Online Access: http://dx.doi.org/10.1139/e98-101; http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-101

Field and U-Pb zircon geochronological studies in a suite of crosscutting, deformed, and metamorphosed basic dykes show that they were emplaced in a syndeformational environment between 1328 ± 2 and 1316.5 ± 1.6 Ma. Earlier dykes in the suite are granulitic, commonly folded along north-south axes or...