High δ13C Neoproterozoic carbonate rocks in western North America

Abstract

Research Article| February 01, 1993 High δ13C Neoproterozoic carbonate rocks in western North America Stephen M. Wickham; Stephen M. Wickham 1Department of the Geophysical Sciences and Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 Search for other works by this author on: GSW Google Scholar Mark T. Peters Mark T. Peters 1Department of the Geophysical Sciences and Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 Search for other works by this author on: GSW Google Scholar Author and Article Information Stephen M. Wickham 1Department of the Geophysical Sciences and Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 Mark T. Peters 1Department of the Geophysical Sciences and Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 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 (2): 165–168. https://doi.org/10.1130/0091-7613(1993)021<0165:HCNCRI>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 Stephen M. Wickham, Mark T. Peters; High δ13C Neoproterozoic carbonate rocks in western North America. Geology 1993;; 21 (2): 165–168. doi: https://doi.org/10.1130/0091-7613(1993)021<0165:HCNCRI>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 13C-rich marbles from the Neoproterozoic McCoy Creek Group having δ13C values up to +12% have been discovered at three separate localities in eastern Nevada and western Utah. Detailed isotopic profiles measured across individual amphibolite facies, metre-thick marble layers have extremely uniform 13C/12C ratios, which probably represent depositional values. Because individual carbonate horizons have distinctly different but abnormally high values of δ13C, the discovery permits the use of 13C/12C ratios for stratigraphic correlation within the generally nonfossiliferous Neoproterozoic sedimentary sequences of western North America, even where these rocks have been strongly metamorphosed. The anomalous values add to a growing array of data from western North America and elsewhere delineating a large and geographically widespread Neoproterozoic carbon isotope anomaly. 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.