Evidence for sulfidic deep water during the Late Permian in the East Greenland Basin

Abstract

Research Article| December 01, 2004 Evidence for sulfidic deep water during the Late Permian in the East Greenland Basin Jesper K. Nielsen; Jesper K. Nielsen 1Department of Geology, University of Tromsø, Dramsveien 201, 9037 Tromsø, Norway Search for other works by this author on: GSW Google Scholar Yanan Shen Yanan Shen 2Centre de Recherche en Géochimie et en Géodynamique, Université du Quebec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal, Quebec H3C 3P8, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Jesper K. Nielsen 1Department of Geology, University of Tromsø, Dramsveien 201, 9037 Tromsø, Norway Yanan Shen 2Centre de Recherche en Géochimie et en Géodynamique, Université du Quebec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal, Quebec H3C 3P8, Canada Publisher: Geological Society of America Received: 22 Jul 2004 Revision Received: 06 Aug 2004 Accepted: 09 Aug 2004 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2004) 32 (12): 1037–1040. https://doi.org/10.1130/G20987.1 Article history Received: 22 Jul 2004 Revision Received: 06 Aug 2004 Accepted: 09 Aug 2004 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 Jesper K. Nielsen, Yanan Shen; Evidence for sulfidic deep water during the Late Permian in the East Greenland Basin. Geology 2004;; 32 (12): 1037–1040. doi: https://doi.org/10.1130/G20987.1 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 A detailed study of the size distribution of framboidal pyrites in the black shales of the Upper Permian Ravnefjeld Formation was performed to evaluate the redox state of the Late Permian ocean. In contrast to framboidal pyrites in bioturbated sediments, the smaller and less variable size distribution of pyrite framboids in the laminated shales of the Ravnefjeld Formation provides persuasive evidence for sulfidic (H2S-rich) bottom-water conditions in the East Greenland Basin. However, the S isotope compositions of both pyrite populations show a similar distribution. The widespread δ34S values of pyrites (−41.2‰ to −28.2‰) in the black shales of the Ravnefjeld Formation indicate a large fractionation (up to 52.7‰) relative to seawater sulfate, and may record different pathways of sulfur cycling in sulfidic water columns as well as within sediments. The new data from the East Greenland Basin indicate that environmental stress such as widespread sulfidic conditions could have caused the biotic crisis in the Late Permian. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.