Sulfur isotope records around Livello Bonarelli (northern Apennines, Italy) black shale at the Cenomanian-Turonian boundary

Abstract

Research Article| June 01, 1999 Sulfur isotope records around Livello Bonarelli (northern Apennines, Italy) black shale at the Cenomanian-Turonian boundary N. Ohkouchi; N. Ohkouchi 1Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan Search for other works by this author on: GSW Google Scholar K. Kawamura; K. Kawamura 1Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan Search for other works by this author on: GSW Google Scholar Y. Kajiwara; Y. Kajiwara 2Institute of Geoscience, University of Tsukuba, Tsukuba 305, Japan Search for other works by this author on: GSW Google Scholar E. Wada; E. Wada 3Center for Ecological Research, Kyoto University, Otsu 520-01, Japan Search for other works by this author on: GSW Google Scholar M. Okada; M. Okada 4Department of Environmental Sciences, Ibaraki University, Mito 310, Japan Search for other works by this author on: GSW Google Scholar T. Kanamatsu; T. Kanamatsu 5Japan Marine Science and Technology Center, Yokosuka 237, Japan Search for other works by this author on: GSW Google Scholar A. Taira A. Taira 6Ocean Research Institute, University of Tokyo, Nakano-ku Tokyo 164, Japan Search for other works by this author on: GSW Google Scholar Geology (1999) 27 (6): 535–538. https://doi.org/10.1130/0091-7613(1999)027<0535:SIRALB>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 MailTo Tools Icon Tools Get Permissions Search Site Citation N. Ohkouchi, K. Kawamura, Y. Kajiwara, E. Wada, M. Okada, T. Kanamatsu, A. Taira; Sulfur isotope records around Livello Bonarelli (northern Apennines, Italy) black shale at the Cenomanian-Turonian boundary. Geology 1999;; 27 (6): 535–538. doi: https://doi.org/10.1130/0091-7613(1999)027<0535:SIRALB>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 Sulfur isotope ratios for carbonate-hosted sulfate show a rapid increase (+6‰ to +9‰/m.y.) across the Livello Bonarelli black shale (Marche-Umbrian Apennines of Italy), which was deposited at the Cenomanian-Turonian boundary in the middle Cretaceous (93.5 Ma). The increase suggests that rates of pyrite burial increased substantially over the event, resulting in a decrease of 9%–27% in the oceanic reservoir of SO42−. The enhanced pyrite burial may have significantly increased the flux of oxygen to the atmosphere (9–27 × 1018 mol/m.y.). Furthermore, removal of the large amount of iron associated with this process might have had a profound effect on iron cycle. 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.