Meltwater along the Arctic margin of the Laurentide Ice Sheet (8-12 ka) : Stable isotopic evidence and implications for past salinity anomalies

Research Article| October 01, 1993 Meltwater along the Arctic margin of the Laurentide Ice Sheet (8-12 ka) : Stable isotopic evidence and implications for past salinity anomalies J. T. Andrews; J. T. Andrews 1Institute of Arctic and Alpine Research and Department of Geological Sciences, Box 450, University of Colorado, Boulder, Colorado 80309 Search for other works by this author on: GSW Google Scholar A. S. Dyke; A. S. Dyke 2Geological Survey of Canada, Terrain Sciences Division, 601 Booth Street, Ottawa, Ontario KlA 0E8, Canada Search for other works by this author on: GSW Google Scholar K. Tedesco; K. Tedesco 1Institute of Arctic and Alpine Research and Department of Geological Sciences, Box 450, University of Colorado, Boulder, Colorado 80309 Search for other works by this author on: GSW Google Scholar J. W. White J. W. White 1Institute of Arctic and Alpine Research and Department of Geological Sciences, Box 450, University of Colorado, Boulder, Colorado 80309 Search for other works by this author on: GSW Google Scholar Author and Article Information J. T. Andrews 1Institute of Arctic and Alpine Research and Department of Geological Sciences, Box 450, University of Colorado, Boulder, Colorado 80309 A. S. Dyke 2Geological Survey of Canada, Terrain Sciences Division, 601 Booth Street, Ottawa, Ontario KlA 0E8, Canada K. Tedesco 1Institute of Arctic and Alpine Research and Department of Geological Sciences, Box 450, University of Colorado, Boulder, Colorado 80309 J. W. White 1Institute of Arctic and Alpine Research and Department of Geological Sciences, Box 450, University of Colorado, Boulder, Colorado 80309 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (10): 881–884. https://doi.org/10.1130/0091-7613(1993)021<0881:MATAMO>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation J. T. Andrews, A. S. Dyke, K. Tedesco, J. W. White; Meltwater along the Arctic margin of the Laurentide Ice Sheet (8-12 ka) : Stable isotopic evidence and implications for past salinity anomalies. Geology 1993;; 21 (10): 881–884. doi: https://doi.org/10.1130/0091-7613(1993)021<0881:MATAMO>2.3.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 We report a new time series of stable isotopic values for the past 12 ka measured in two species of shallow-water marine bivalves collected from raised marine deposits along the coast of Arctic Canada. Each sample (n = 60) had been radiocarbon dated previously. The results indicate that between 11.8 and 10 ka the δ18O of the shells ranged between 0.25???? and -6????, but values increased after 9 ka as the flux of meltwater to the Arctic Ocean decreased and as the Canadian Arctic channels opened to allow the present surface circulation to become established. Prior to about 9 ka, glacial meltwaters from the northern margin of the Laurentide Ice Sheet must have been entrained in the surface waters of the Arctic Ocean and directed southward to the North Atlantic through Fram Strait. This source of meltwater must be included in late Quaternary models of forcing of the North Atlantic thermohaline circulation. Glacial isostatic uplift of the sills within the Canadian Arctic channels implies that outflow through Fram Strait increased during the Holocene. 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.