U-Pb ages (3.8–2.7 Ga) and Nd isotope data from the newly identified Eoarchean Nuvvuagittuq supracrustal belt, Superior Craton, Canada

Research Article| January 01, 2009 U-Pb ages (3.8–2.7 Ga) and Nd isotope data from the newly identified Eoarchean Nuvvuagittuq supracrustal belt, Superior Craton, Canada Jean David; Jean David 1Service Géologique de Québec, Ministère des Ressources Naturelles de la Faune et des Parcs, 5700 4ième Avenue Ouest, Charlesbourg, QC, Canada G1H 6R1, and GEOTOP-UQAM-McGill—Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal, Quebec H3C 3P8, Canada Search for other works by this author on: GSW Google Scholar Laurent Godin; Laurent Godin 2Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada Search for other works by this author on: GSW Google Scholar Ross Stevenson; Ross Stevenson † 3GEOTOP-UQAM-McGill and Département des Sciences de la Terre et de l'Atmosphère—Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal, Quebec H3C 3P8, Canada †E-mail: stevenson.ross@uqam.ca Search for other works by this author on: GSW Google Scholar Jonathan O'Neil; Jonathan O'Neil 4Earth & Planetary Sciences, McGill University, 3450 University St., Montreal, Quebec H3A 2A7, Canada Search for other works by this author on: GSW Google Scholar Don Francis Don Francis 4Earth & Planetary Sciences, McGill University, 3450 University St., Montreal, Quebec H3A 2A7, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Jean David 1Service Géologique de Québec, Ministère des Ressources Naturelles de la Faune et des Parcs, 5700 4ième Avenue Ouest, Charlesbourg, QC, Canada G1H 6R1, and GEOTOP-UQAM-McGill—Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal, Quebec H3C 3P8, Canada Laurent Godin 2Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada Ross Stevenson † 3GEOTOP-UQAM-McGill and Département des Sciences de la Terre et de l'Atmosphère—Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal, Quebec H3C 3P8, Canada Jonathan O'Neil 4Earth & Planetary Sciences, McGill University, 3450 University St., Montreal, Quebec H3A 2A7, Canada Don Francis 4Earth & Planetary Sciences, McGill University, 3450 University St., Montreal, Quebec H3A 2A7, Canada †E-mail: stevenson.ross@uqam.ca Publisher: Geological Society of America Received: 14 Nov 2007 Revision Received: 16 Apr 2008 Accepted: 27 May 2008 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2008 Geological Society of America GSA Bulletin (2009) 121 (1-2): 150–163. https://doi.org/10.1130/B26369.1 Article history Received: 14 Nov 2007 Revision Received: 16 Apr 2008 Accepted: 27 May 2008 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Jean David, Laurent Godin, Ross Stevenson, Jonathan O'Neil, Don Francis; U-Pb ages (3.8–2.7 Ga) and Nd isotope data from the newly identified Eoarchean Nuvvuagittuq supracrustal belt, Superior Craton, Canada. GSA Bulletin 2009;; 121 (1-2): 150–163. doi: https://doi.org/10.1130/B26369.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract We report new U-Pb ages and Sm-Nd isotope data for an Eoarchean volcano-sedimentary sequence in the northeast Superior Province of northern Quebec, Canada. The Nuvvuagittuq supracrustal sequence is characterized by mafic amphibolite rocks with rare felsic schists, accompanied by ultramafic sills, oxide-rich and quartz-rich iron formations, and possible conglomeratic units, with peak metamorphism having reached upper amphibolite facies. The sequence crops out as an open, shallow, south-plunging synform with tonalites in the center and around the exterior margins of the fold structure. A 3817 ± 16 Ma age from a felsic schist is interpreted to represent a maximum age for the sequence, whereas a 3661 ± 4 Ma age from the enclosing tonalites suggests a minimum age. Detrital zircons from a conglomeratic unit yielded similar old ages of ca. 3.78 Ga. Younger ages of ca. 3.66 and 3.3 Ga from a conglomeratic unit and a felsic schist, and 2.7 Ga ages from an amphibolite gabbro and a pegmatite dike, underline the polymetamorphic history of the sequence. Initial Nd isotope compositions (ϵNd3.8 = −0.5 to + 2.3) for mafic amphibolites and felsic schists are indicative of a moderately depleted mantle. Sm-Nd analyses of a 2.7 Ga pegmatite dike and the ca. 3.66 Ga tonalites both yield Nd depleted mantle model ages (TDM) of ca. 3.9 Ga, indicating that they were derived from a crust of juvenile Eoarchean origin. We propose that fragments of Paleoarchean to Eoarchean terranes that rim the Superior Province represent remnants of a larger terrane(s) that was rifted and dismembered prior to the formation of the 3.0–2.7 Ga Superior Craton. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.