Abstract
Research Article| November 01, 1986 Eocene basalts from the Yakutat terrane: Evidence for the origin of an accreting terrane in southern Alaska Alicé S. Davis; Alicé S. Davis 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar George Plafker George Plafker 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Author and Article Information Alicé S. Davis 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 George Plafker 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1986) 14 (11): 963–966. https://doi.org/10.1130/0091-7613(1986)14<963:EBFTYT>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 MailTo Tools Icon Tools Get Permissions Search Site Citation Alicé S. Davis, George Plafker; Eocene basalts from the Yakutat terrane: Evidence for the origin of an accreting terrane in southern Alaska. Geology 1986;; 14 (11): 963–966. doi: https://doi.org/10.1130/0091-7613(1986)14<963:EBFTYT>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 Basalts from the Yakutat terrane, a composite oceanic and continental tectonostratigraphic terrane, are chemically diverse large ion lithophile element (LILE)–depleted and LILE-enriched tholeiites, interpreted as normal mid-ocean ridge and oceanic island basalt, that originated on seamounts near the Kula-Farallon spreading center during the early to middle Eocene. Coeval and geochemically similar basalts, occurring sporadically in a linear belt from southern Vancouver Island to the southern Oregon Coast Range, are correlative with the Yakutat terrane basalts. Both basaltic sequences were accreted to the continental margin during subduction of the Kula-Farallon Ridge and Kula plate about 48 Ma. The Yakutat basalts were emplaced along the coast of Washington or British Columbia. The Yakutat terrane probably originated during the Neogene as a composite terrane when it was sliced off the continental margin and started to move northward along the Queen Charlotte-Fairweather transform fault toward its present location in southern Alaska. 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.
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