00000nam 2200000zi 4500 9.895425 CaOODSP 20251031142448 m o d f cr cn||||||||| 210118t20202020oncab ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-nu M183-2/8625E-PDF Camacho, Alfredo, author. ⁴⁰Ar/³⁹Ar hornblende and biotite cooling ages for metaplutonic rocks of the central Thelon tectonic zone, Nunavut / A. Camacho, R.G. Berman, and M. Sanborn-Barrie. Ottawa, Ontario : Geological Survey of Canada, 2020. ©2020 1 online resource (77 pages) : colour illustrations, colour maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Open file ; 8625 This record only includes the Open File report in PDF; the complete data set with all the files in various formats is available for free download at http://geoscan.nrcan.gc.ca/. Includes bibliographical references (pages 75-77). "The Thelon tectonic zone (Ttz) is a ~500 km long, northeast-striking geophysical and geological feature separating the Slave and Rae cratons of the Canadian shield. The tectonic significance of the Ttz is uncertain, having been interpreted both as a Paleoproterozoic suture and as an intracontinental orogenic belt. Better understanding of the tectonic setting of the Ttz and the control of its crustal architecture on economic potential were primary goals of the Geomapping for Energy and Minerals (GEM) Thelon tectonic zone research activity. This report presents 43 new ⁴⁰Ar/³⁹Ar hornblende and biotite analyses for metaplutonic rock samples from the central Ttz and adjacent regions, Nunavut. Samples were collected during three field seasons (2012, 2014, and 2016) in order to: (i) delineate domains with differing cooling histories and (ii) improve understanding of the differences in timing of regional metamorphism and exhumation across the Ttz. These data will be used in the future to evaluate and refine tectonic models for the evolution of the Ttz"—Introduction, page 1. Argon-argon dating Nunavut. Geological time Nunavut. Metamorphic rocks Nunavut. Datation Méthode argon 40-argon 39 Nunuvat. Géochronologie Nunavut. Roches métamorphiques Nunavut. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 8625. (CaOODSP)9.506878 PDF 25.14 MB https://publications.gc.ca/collections/collection_2021/rncan-nrcan/m183-2/M183-2-8625-eng.pdf (Open File report) HTML N/A https://doi.org/10.4095/315135 (complete data set) 315135