Apatite phenocryst compositions demonstrate a miscorrelation between the Millbrig and Kinnekulle K-bentonites of North America and Scandinavia

Abstract

Research Article| April 01, 2011 Apatite phenocryst compositions demonstrate a miscorrelation between the Millbrig and Kinnekulle K-bentonites of North America and Scandinavia Bryan K. Sell; Bryan K. Sell Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Search for other works by this author on: GSW Google Scholar Scott D. Samson Scott D. Samson Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Bryan K. Sell Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Scott D. Samson Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Publisher: Geological Society of America Received: 27 May 2010 Revision Received: 27 Aug 2010 Accepted: 29 Oct 2010 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2011 Geological Society of America Geology (2011) 39 (4): 303–306. https://doi.org/10.1130/G31425.1 Article history Received: 27 May 2010 Revision Received: 27 Aug 2010 Accepted: 29 Oct 2010 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Bryan K. Sell, Scott D. Samson; Apatite phenocryst compositions demonstrate a miscorrelation between the Millbrig and Kinnekulle K-bentonites of North America and Scandinavia. Geology 2011;; 39 (4): 303–306. doi: https://doi.org/10.1130/G31425.1 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 The Ordovician Millbrig K-bentonite of North America and the Kinnekulle "Big Bed" of Scandinavia have been considered correlative, thus representing one of the largest volcanic eruptions of the Phanerozoic. Whether these two K-bentonites correlate has implications for the paleogeographic reconstructions of Laurentia and Baltica, transoceanic biostratigraphic correlations of graptolites and conodonts, and the possibly global occurrence of the Guttenberg carbon isotope excursion. Trace element analyses of apatite phenocrysts have proven to be good discriminators for other Ordovician K-bentonites and it is shown here, on the basis of significantly different Mg, Cl, Mn, Fe, Ce, and Y concentrations in apatite phenocrysts from the Kinnekulle and Millbrig K-bentonites, that the beds must be viewed as representing two or more different eruptions. Vertical subsampling of several layers from each bed suggests that both beds are likely composed of multiple components, but none of the components coincide with one another. These results indicate that the Millbrig and Kinnekulle beds cannot both be derived from a single ultra-Plinian eruption, as previously proposed. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.