Research Article| August 01, 1994 The isotopic record of ocean chemistry and diagenesis preserved in non-luminescent brachiopods from Mississippian carbonate rocks, Illinois and Missouri JAY L. BANNER; JAY L. BANNER 1Department of Geological Sciences, University of Texas, Austin, Texas 78712 Search for other works by this author on: GSW Google Scholar JONATHAN KAUFMAN JONATHAN KAUFMAN 2Exxon Production Research Company, P. O. Box 2189, Houston, Texas 77252-2189 Search for other works by this author on: GSW Google Scholar Author and Article Information JAY L. BANNER 1Department of Geological Sciences, University of Texas, Austin, Texas 78712 JONATHAN KAUFMAN 2Exxon Production Research Company, P. O. Box 2189, Houston, Texas 77252-2189 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1994) 106 (8): 1074–1082. https://doi.org/10.1130/0016-7606(1994)106<1074:TIROOC>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 Email Permissions Search Site Citation JAY L. BANNER, JONATHAN KAUFMAN; The isotopic record of ocean chemistry and diagenesis preserved in non-luminescent brachiopods from Mississippian carbonate rocks, Illinois and Missouri. GSA Bulletin 1994;; 106 (8): 1074–1082. doi: https://doi.org/10.1130/0016-7606(1994)106<1074:TIROOC>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 Fossil brachiopod shells are commonly used as a faithful record of the chemical and isotopic composition of the ancient ocean water in which they grew, owing to their stable mineralogy and their presence in marine strata throughout Phanerozoic time. The utility of these fossils for preserving ocean-water compositions is evaluated through analyses of multiple specimens that grew in contemporaneous sea water at individual stratigraphic horizons in the Mississippian-age Burlington-Keokuk Formation of mid-continent North America. Significant variations in Sr, C, and O isotopic compositions are observed in contemporaneous, non-luminescent shells, indicating that apparently pristine brachiopod shell material has been altered by post-depositional processes of diagenesis. The least-altered compositions at each horizon are used to estimate secular variations of 87Sr/86Sr in Early Mississippian ocean water. The estimated rates of change of ocean-water 87Sr/86Sr are comparable in magnitude to the rapid Sr isotopic changes documented for Cenozoic ocean water, for which high-frequency glacial cycles are inferred as a driving mechanism. The rigorous assessment of diagenetic effects on the isotopic signatures of marine phases is requisite for the advancement of high-resolution reconstructions of paleo-ocean chemistry. 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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Banner et al. (1994) studied this question.