Detrital zircon geochronology of the western Ellesmerian clastic wedge, northwestern Canada: Insights on Arctic tectonics and the evolution of the northern Cordilleran miogeocline
2010; Geological Society of America; Volume: 122; Issue: 11-12 Linguagem: Inglês
10.1130/b30120.1
ISSN1943-2674
AutoresLuke P. Beranek, James K. Mortensen, L S Lane, T. L. Allen, Tiffani Fraser, Thomas Hadlari, W Zantvoort,
Tópico(s)Geochemistry and Geologic Mapping
ResumoResearch Article| November 01, 2010 Detrital zircon geochronology of the western Ellesmerian clastic wedge, northwestern Canada: Insights on Arctic tectonics and the evolution of the northern Cordilleran miogeocline Luke P. Beranek; Luke P. Beranek 1Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, British Columbia, V6T 1Z4, Canada †Current address: Geological Survey of Canada, 625 Robson Street, Vancouver, British Columbia, V6B 5J3, Canada; e-mail: luke.beranek@nrcan.gc.ca Search for other works by this author on: GSW Google Scholar James K. Mortensen; James K. Mortensen 1Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, British Columbia, V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar Larry S. Lane; Larry S. Lane 2Geological Survey of Canada, 3303-33 Street North West, Calgary, Alberta, T2L 2A7, Canada Search for other works by this author on: GSW Google Scholar Tammy L. Allen; Tammy L. Allen 3Yukon Geological Survey, Box 2703 (K-10), Whitehorse, Yukon, Y1A 2C6, Canada Search for other works by this author on: GSW Google Scholar Tiffani A. Fraser; Tiffani A. Fraser 3Yukon Geological Survey, Box 2703 (K-10), Whitehorse, Yukon, Y1A 2C6, Canada Search for other works by this author on: GSW Google Scholar Thomas Hadlari; Thomas Hadlari 4Northwest Territories Geology Office, 4601-B 52nd Avenue, Box 1500, Yellowknife, Northwest Territories, X1A 2R3, Canada §Current address: Geological Survey of Canada, 3303-33 Street North West, Calgary, Alberta, T2L 2A7, Canada. Search for other works by this author on: GSW Google Scholar Willem G. Zantvoort Willem G. Zantvoort 4Northwest Territories Geology Office, 4601-B 52nd Avenue, Box 1500, Yellowknife, Northwest Territories, X1A 2R3, Canada #Current address: Husky Energy, Inc., 707-8th Avenue SW, Box 6525, Station D, Calgary, Alberta, T2P 3G7, Canada. Search for other works by this author on: GSW Google Scholar Author and Article Information Luke P. Beranek †Current address: Geological Survey of Canada, 625 Robson Street, Vancouver, British Columbia, V6B 5J3, Canada; e-mail: luke.beranek@nrcan.gc.ca 1Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, British Columbia, V6T 1Z4, Canada James K. Mortensen 1Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, British Columbia, V6T 1Z4, Canada Larry S. Lane 2Geological Survey of Canada, 3303-33 Street North West, Calgary, Alberta, T2L 2A7, Canada Tammy L. Allen 3Yukon Geological Survey, Box 2703 (K-10), Whitehorse, Yukon, Y1A 2C6, Canada Tiffani A. Fraser 3Yukon Geological Survey, Box 2703 (K-10), Whitehorse, Yukon, Y1A 2C6, Canada Thomas Hadlari §Current address: Geological Survey of Canada, 3303-33 Street North West, Calgary, Alberta, T2L 2A7, Canada. 4Northwest Territories Geology Office, 4601-B 52nd Avenue, Box 1500, Yellowknife, Northwest Territories, X1A 2R3, Canada Willem G. Zantvoort #Current address: Husky Energy, Inc., 707-8th Avenue SW, Box 6525, Station D, Calgary, Alberta, T2P 3G7, Canada. 4Northwest Territories Geology Office, 4601-B 52nd Avenue, Box 1500, Yellowknife, Northwest Territories, X1A 2R3, Canada Publisher: Geological Society of America Received: 25 Jun 2009 Revision Received: 15 Jan 2010 Accepted: 30 Jan 2010 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2010 Geological Society of America GSA Bulletin (2010) 122 (11-12): 1899–1911. https://doi.org/10.1130/B30120.1 Article history Received: 25 Jun 2009 Revision Received: 15 Jan 2010 Accepted: 30 Jan 2010 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Luke P. Beranek, James K. Mortensen, Larry S. Lane, Tammy L. Allen, Tiffani A. Fraser, Thomas Hadlari, Willem G. Zantvoort; Detrital zircon geochronology of the western Ellesmerian clastic wedge, northwestern Canada: Insights on Arctic tectonics and the evolution of the northern Cordilleran miogeocline. GSA Bulletin 2010;; 122 (11-12): 1899–1911. doi: https://doi.org/10.1130/B30120.1 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 Detrital zircon provenance investigations of mid-Paleozoic sandstone from the western Ellesmerian clastic wedge and Cordilleran miogeocline in northern Yukon and Northwest Territories, northwestern Canada, provide critical new data on the source of foreland basin sedimentation attributed to terrane accretion and plate convergence along the ancestral Arctic margin of North America. Late Devonian and early Mississippian clastic wedge strata yield "exotic" ca. 360–390, 430–460, 530–680, and 1500–1600 Ma detrital zircon populations that are consistent with source rocks that originated near the Caledonian and Timanian orogenic belts. Specifically, the Pearya and Arctic Alaska–Chukotka terranes, the landmass of Crockerland, and Caledonian rocks in eastern Greenland are the inferred sources for exotic detrital zircons in clastic wedge strata. Progressive recycling of Ellesmerian foreland basin sediments into the continental margin environment along northwestern Laurentia is indicated by the presence of ca. 360–430 Ma and 1500–1600 Ma detrital zircons in post-tectonic, middle to late Mississippian miogeoclinal strata in Yukon. Provenance data from these Mississippian samples record a dramatic shift in the source of the Cordilleran miogeocline, since Caledonian and Baltican (Timanide) detrital zircon signatures are not recognized in pre–Late Devonian sedimentary rocks in western Canada. Devonian strata of the Alexander terrane and Yreka subterrane (eastern Klamath terrane) have Caledonian and Baltican detrital zircon age signatures similar to Ellesmerian clastic wedge sandstones, implying that several Cordilleran terranes originated in the paleo-Arctic realm. Speculative correlations suggest that the Arctic Alaska–Chukotka terrane was located to the west of Crockerland and the Canadian Arctic Islands in pre-Cretaceous time, prior to opening of the Amerasian basin. Rifting models for the western Arctic Ocean featuring counterclockwise rotation of the Arctic Alaska–Chukotka terrane away from the Canadian Arctic Islands may need reevaluation. 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