Silurian strontium isotope stratigraphy

Abstract

Research Article| April 01, 1999 Silurian strontium isotope stratigraphy Karem Azmy; Karem Azmy 1Ottawa-Carleton Geoscience Centre, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada Search for other works by this author on: GSW Google Scholar Jan Veizer; Jan Veizer 1Ottawa-Carleton Geoscience Centre, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada2Institut für Geologie, Ruhr Universität, 44780 Bochum, Germany Search for other works by this author on: GSW Google Scholar Bernd Wenzel; Bernd Wenzel 3Institut für Geologie der Universität Erlangen-Nürnberg, 91054 Erlangen, Germany Search for other works by this author on: GSW Google Scholar Michael G. Bassett; Michael G. Bassett 4Department of Geology, National Museum of Wales, Cardiff CF1 3NP, United Kingdom Search for other works by this author on: GSW Google Scholar Paul Copper Paul Copper 5Department of Earth Sciences, Laurentian University, Sudbury, Ontario P3E 2C6, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Karem Azmy 1Ottawa-Carleton Geoscience Centre, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada Jan Veizer 1Ottawa-Carleton Geoscience Centre, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada2Institut für Geologie, Ruhr Universität, 44780 Bochum, Germany Bernd Wenzel 3Institut für Geologie der Universität Erlangen-Nürnberg, 91054 Erlangen, Germany Michael G. Bassett 4Department of Geology, National Museum of Wales, Cardiff CF1 3NP, United Kingdom Paul Copper 5Department of Earth Sciences, Laurentian University, Sudbury, Ontario P3E 2C6, Canada Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1999) 111 (4): 475–483. https://doi.org/10.1130/0016-7606(1999)111<0475:SSIS>2.3.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 Karem Azmy, Jan Veizer, Bernd Wenzel, Michael G. Bassett, Paul Copper; Silurian strontium isotope stratigraphy. GSA Bulletin 1999;; 111 (4): 475–483. doi: https://doi.org/10.1130/0016-7606(1999)111<0475:SSIS>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 SocietyGSA Bulletin Search Advanced Search Abstract A sample set of 164 calcitic brachiopod shells, covering the entire Silurian Period (∼ 30 m.y.) with a resolution of about 0.7 m.y., was collected from stratotype sections at Anticosti Island (Canada), Wales (United Kingdom), Gotland (Sweden), Podolia (Ukraine), Latvia, and Lithuania. They show 87Sr/86Sr values ranging from 0.707930 to 0.708792 that progressively increase with time. This may indicate an increasing riverine flux of radiogenic Sr into the ocean from weathering of continental sialic rocks due to progressive warming of the climate. Exceptionally high increases in 87Sr/86Sr values were observed in early Llandovery (Rhuddanian), late Llandovery (Telychian), and late Ludlow (Gorstian-Ludfordian boundary) samples. Partial linear regressions, based on a stepwise climbing pattern, with local drops around the Llandovery-Wenlock boundary and in latest Ludlow time, were used to estimate relative ages with a resolution of about ±2 biozones (∼1.5–2 m.y.). The Sr-isotope curve shows distinct inflection points in earliest Wenlock and mid-Prídolí time. These may be used to correlate the Llandovery-Wenlock boundary in the United Kingdom, Gotland, and Lithuania, and the Kaugatuma-Ohesaare boundary in the Baltic states and Podolia. 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.