Collisional Snowbird tectonic zone resurrected: Growth of Laurentia during the 1.9 Ga accretionary phase of the Hudsonian orogeny

Abstract

Research Article| October 01, 2007 Collisional Snowbird tectonic zone resurrected: Growth of Laurentia during the 1.9 Ga accretionary phase of the Hudsonian orogeny R.G. Berman; R.G. Berman 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Search for other works by this author on: GSW Google Scholar W.J. Davis; W.J. Davis 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Search for other works by this author on: GSW Google Scholar S. Pehrsson S. Pehrsson 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information R.G. Berman 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada W.J. Davis 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada S. Pehrsson 1Geological Survey of Canada, 615 Booth Street, Ottawa, Ontario K1A 0E9, Canada Publisher: Geological Society of America Received: 02 Feb 2007 Revision Received: 21 May 2007 Accepted: 25 May 2007 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2007) 35 (10): 911–914. https://doi.org/10.1130/G23771A.1 Article history Received: 02 Feb 2007 Revision Received: 21 May 2007 Accepted: 25 May 2007 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation R.G. Berman, W.J. Davis, S. Pehrsson; Collisional Snowbird tectonic zone resurrected: Growth of Laurentia during the 1.9 Ga accretionary phase of the Hudsonian orogeny. Geology 2007;; 35 (10): 911–914. doi: https://doi.org/10.1130/G23771A.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 SocietyGeology Search Advanced Search Abstract The ∼2800-km-long Snowbird tectonic zone is one of the most controversial tectonic features of the Canadian shield. Metamorphic and in situ geochronologic data reported here reveal that a 1.9 Ga medium- to high-pressure belt extends along most of this tectonic zone. In contrast to recent interpretations, a collisional origin is indicated by the length of this metamorphic belt, tectonic thickening documented in parts of it, geological contrasts across it, and subduction-type microdiamonds within it. This collisional event marks a pre–1.865 Ga phase of the Hudsonian orogeny involving microcontinent accretion that was fundamental to the growth of Laurentia. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.