Title: Brachiopods as indicators of original isotopic compositions in some Paleozoic limestones
Abstract: Research Article| October 01, 1986 Brachiopods as indicators of original isotopic compositions in some Paleozoic limestones BRIAN N. POPP; BRIAN N. POPP 1Department of Geology, University of Illinois, 245 Natural History Building, 1301 West Green Street, Urbana, Illinois 61801-2999 Search for other works by this author on: GSW Google Scholar THOMAS F. ANDERSON; THOMAS F. ANDERSON 1Department of Geology, University of Illinois, 245 Natural History Building, 1301 West Green Street, Urbana, Illinois 61801-2999 Search for other works by this author on: GSW Google Scholar PHILIP A. SANDBERG PHILIP A. SANDBERG 1Department of Geology, University of Illinois, 245 Natural History Building, 1301 West Green Street, Urbana, Illinois 61801-2999 Search for other works by this author on: GSW Google Scholar Author and Article Information BRIAN N. POPP 1Department of Geology, University of Illinois, 245 Natural History Building, 1301 West Green Street, Urbana, Illinois 61801-2999 THOMAS F. ANDERSON 1Department of Geology, University of Illinois, 245 Natural History Building, 1301 West Green Street, Urbana, Illinois 61801-2999 PHILIP A. SANDBERG 1Department of Geology, University of Illinois, 245 Natural History Building, 1301 West Green Street, Urbana, Illinois 61801-2999 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1986) 97 (10): 1262–1269. https://doi.org/10.1130/0016-7606(1986)97<1262:BAIOOI>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 BRIAN N. POPP, THOMAS F. ANDERSON, PHILIP A. SANDBERG; Brachiopods as indicators of original isotopic compositions in some Paleozoic limestones. GSA Bulletin 1986;; 97 (10): 1262–1269. doi: https://doi.org/10.1130/0016-7606(1986)97<1262:BAIOOI>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 The original stable isotopic composition of Paleozoic marine carbonate rocks is important to establish a baseline for evaluating diagenetic alteration and providing a reliable data-base for modeling exogenic geochemical cycles of the elements. We have compared the δ18O and δ13C values in the nonluminescent portions of brachiopods with similar published data of whole brachiopods, other whole fossils, and estimates of original isotopic composition of marine cements.The oxygen and carbon isotopic records for each of these Paleozoic components show generally good internal consistency. Significant discrepancies, however, were noted between results on the different components. Isotopic and trace-element data presented in this study suggest that Permo-Carboniferous whole brachiopods are little altered chemically. Nonetheless, a more reliable (but not fool-proof) approach for obtaining pristine isotopic values is microsampling of “least-altered” regions based on cathodoluminescence in conjunction with staining techniques and elemental analyses.The carbon and oxygen isotopic compositions of all components decrease in δ18O and δ13C in geologically older material. Neither temporal trend is monotonic, however. Oxygen isotopic results suggest an important positive shift in δ18O of about 2‰ during the early Carboniferous, whereas the carbon isotope trend shows a major positive shift (≈2%–3‰) during the mid-Carboniferous. 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.
Publication Year: 1986
Publication Date: 1986-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 386
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