Nd isotopic excursion across Cretaceous ocean anoxic event 2 (Cenomanian-Turonian) in the tropical North Atlantic

Abstract

Research Article| October 01, 2008 Nd isotopic excursion across Cretaceous ocean anoxic event 2 (Cenomanian-Turonian) in the tropical North Atlantic Kenneth G. MacLeod; Kenneth G. MacLeod * 11Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211, USA *E-mail: macleodk@missouri.edu. Search for other works by this author on: GSW Google Scholar Ellen E. Martin; Ellen E. Martin 22Department of Geological Sciences, University of Florida, Gainesville, Florida 32611, USA Search for other works by this author on: GSW Google Scholar Susanna W. Blair Susanna W. Blair 22Department of Geological Sciences, University of Florida, Gainesville, Florida 32611, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Kenneth G. MacLeod * 11Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211, USA Ellen E. Martin 22Department of Geological Sciences, University of Florida, Gainesville, Florida 32611, USA Susanna W. Blair 22Department of Geological Sciences, University of Florida, Gainesville, Florida 32611, USA *E-mail: macleodk@missouri.edu. Publisher: Geological Society of America Received: 30 Mar 2008 Revision Received: 10 Jul 2008 Accepted: 16 Jul 2008 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2008 Geological Society of America Geology (2008) 36 (10): 811–814. https://doi.org/10.1130/G24999A.1 Article history Received: 30 Mar 2008 Revision Received: 10 Jul 2008 Accepted: 16 Jul 2008 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Kenneth G. MacLeod, Ellen E. Martin, Susanna W. Blair; Nd isotopic excursion across Cretaceous ocean anoxic event 2 (Cenomanian-Turonian) in the tropical North Atlantic. Geology 2008;; 36 (10): 811–814. doi: https://doi.org/10.1130/G24999A.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 Late Cretaceous fish debris from Demerara Rise exhibits a dramatic positive excursion of 8 ϵNd units during ocean anoxic event 2 (OAE2) that is superimposed on extremely low ϵNd(t) values (−14 to −16.5) observed throughout the rest of the studied interval. The OAE2 ϵNd excursion is the largest yet documented in marine sediments, and the majority of the shift is estimated to have occurred over <20 k.y. Low background ϵNd values on Demerara Rise are explained as the Nd isotopic signature of the South American craton, whereas eruptions of the Caribbean large igneous province or enhanced mixing of intermediate waters in the North Atlantic could have caused the excursion. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.