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Uranium-series dating of the Pleistocene reef tracts of Barbados, West Indies

1979; Geological Society of America; Volume: 90; Issue: 6 Linguagem: Inglês

10.1130/0016-7606(1979)90 2.0.co;2

1943-2674

Michael L. Bender, Richard G. Fairbanks, Frederick W. Taylor, R. K. Matthews, J. Goddard, Wallace S. Broecker,

Marine Biology and Ecology Research

Research Article| June 01, 1979 Uranium-series dating of the Pleistocene reef tracts of Barbados, West Indies MICHAEL L. BENDER; MICHAEL L. BENDER 1Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 Search for other works by this author on: GSW Google Scholar RICHARD G. FAIRBANKS; RICHARD G. FAIRBANKS 2Department of Geological Sciences, Brown University, Providence, Rhode Island 02903 Search for other works by this author on: GSW Google Scholar F. W. TAYLOR; F. W. TAYLOR 2Department of Geological Sciences, Brown University, Providence, Rhode Island 02903 Search for other works by this author on: GSW Google Scholar R. K. MATTHEWS; R. K. MATTHEWS 2Department of Geological Sciences, Brown University, Providence, Rhode Island 02903 Search for other works by this author on: GSW Google Scholar JOHN G. GODDARD; JOHN G. GODDARD 3Lamont-Doherty Geological Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar WALLACE S. BROECKER WALLACE S. BROECKER 3Lamont-Doherty Geological Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Author and Article Information MICHAEL L. BENDER 1Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 RICHARD G. FAIRBANKS 2Department of Geological Sciences, Brown University, Providence, Rhode Island 02903 F. W. TAYLOR 2Department of Geological Sciences, Brown University, Providence, Rhode Island 02903 R. K. MATTHEWS 2Department of Geological Sciences, Brown University, Providence, Rhode Island 02903 JOHN G. GODDARD 3Lamont-Doherty Geological Observatory, Palisades, New York 10964 WALLACE S. BROECKER 3Lamont-Doherty Geological Observatory, Palisades, New York 10964 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1979) 90 (6): 577–594. https://doi.org/10.1130/0016-7606(1979)90 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 MICHAEL L. BENDER, RICHARD G. FAIRBANKS, F. W. TAYLOR, R. K. MATTHEWS, JOHN G. GODDARD, WALLACE S. BROECKER; Uranium-series dating of the Pleistocene reef tracts of Barbados, West Indies. GSA Bulletin 1979;; 90 (6): 577–594. doi: https://doi.org/10.1130/0016-7606(1979)90 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 SocietyGSA Bulletin Search Advanced Search Abstract Detailed studies of reef-tract stratigraphy in the southwestern part of Barbados have revealed nine, seven, and ten reef tracts in the Christ Church, Clermont Nose, and Saint George's Valley sections, respectively. The reefs have been projected onto standard traverses, and present elevations are reported for each reef crest.To date the reef crests by Th230/U and He4/U methods, the U234/U238 and Th230/U234 activity ratios and U and He4 concentrations were determined in about 35 unrecrystallized coral samples. Discordant U234/U238, Th230/U, and He4/U ages for many samples indicate that both U234 and Th230 have been diagenetically added to the samples. He4/U ages are corrected by subtracting the He4 added due to the presence of "open system" U-series nuclides; the correction ranges from 0% to 10%.The reef-tract ages and present elevations as projected on the standard traverse show that prior to 125,000 B.P., the uplift rate of the Christ Church section was much greater than the rate after 125,000 B.P. Paleo-sea levels inferred from Saint George's Valley reef tract ages and elevations cluster about the present datum, which suggests that throughout the Brunhes epoch, minimum interglacial continental ice volume was comparable to the present value.Within the uncertainty of the age and paleo—sea-level estimates, the Brunhes sea-level history inferred from Barbados reef-tract chronostratigraphy is consistent with that inferred by Shackleton and Opdyke from the oxygen isotope record of core V28-238. 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.