Short-lived 1.9 Ga continental margin and its destruction, Wopmay orogen, northwest Canada
Research Article| February 01, 1984 Short-lived 1.9 Ga continental margin and its destruction, Wopmay orogen, northwest Canada Paul F. Hoffman; Paul F. Hoffman 1Geological Survey of Canada, Ottawa, Ontario K1A OE4, Canada Search for other works by this author on: GSW Google Scholar Samuel A. Bowring Samuel A. Bowring 2Department of Geology, University of Kansas, Lawrence, Kansas 66045 Search for other works by this author on: GSW Google Scholar Author and Article Information Paul F. Hoffman 1Geological Survey of Canada, Ottawa, Ontario K1A OE4, Canada Samuel A. Bowring 2Department of Geology, University of Kansas, Lawrence, Kansas 66045 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1984) 12 (2): 68–72. https://doi.org/10.1130/0091-7613(1984)12<68:SGCMAI>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Paul F. Hoffman, Samuel A. Bowring; Short-lived 1.9 Ga continental margin and its destruction, Wopmay orogen, northwest Canada. Geology 1984;; 12 (2): 68–72. doi: https://doi.org/10.1130/0091-7613(1984)12<68:SGCMAI>2.0.CO;2 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 A 1.9 Ga continental margin in the northwest of the Canadian Shield evolved in less than 15 m.y. from a zone of crustal stretching, through a phase of passive-margin subsidence, to attempted subduction beneath an exotic(?) microcontinent. Reversal of subduction polarity and generation of a major episutural magmatic arc occurred within 15 m.y. following microcontinental accretion. Terminal collision occurred 90 m.y., at most, after initial rifting. Certain differences in detail between this collided margin and those of Phanerozoic age may be related to subduction of newly rifted lithosphere. Rapid evolution of the orogen, the contracted passive-margin phase in particular, is consistent with (but does not prove) more rapid recycling of oceanic plates at that time. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.