Eocene to Miocene magnetostratigraphy, biostratigraphy, and chemostratigraphy at ODP Site 1090 (sub-Antarctic South Atlantic)

Abstract

Research Article| May 01, 2003 Eocene to Miocene magnetostratigraphy, biostratigraphy, and chemostratigraphy at ODP Site 1090 (sub-Antarctic South Atlantic) J.E.T. Channell; J.E.T. Channell 1Department of Geological Sciences, University of Florida, Post Office Box 112120, Gainesville, Florida 32611, USA Search for other works by this author on: GSW Google Scholar S. Galeotti; S. Galeotti 2Istituto di Geologia, Università degli Studi di Urbino, Campus Scientifico, Località Crocicchia, 61029 Urbino, Italy Search for other works by this author on: GSW Google Scholar E.E. Martin; E.E. Martin 3Department of Geological Sciences, University of Florida, Post Office Box 112120, Gainesville, Florida 32611, USA Search for other works by this author on: GSW Google Scholar K. Billups; K. Billups 4College of Marine Studies, University of Delaware, 700 Pilottown Road, Lewes, Delaware 19958, USA Search for other works by this author on: GSW Google Scholar H.D. Scher; H.D. Scher 5Department of Geological Sciences, University of Florida, Post Office Box 112120, Gainesville, Florida 32611, USA Search for other works by this author on: GSW Google Scholar J.S. Stoner J.S. Stoner 6Institute of Arctic and Alpine Research (INSTAAR), University of Colorado, Boulder, Colorado 80309, USA Search for other works by this author on: GSW Google Scholar Author and Article Information J.E.T. Channell 1Department of Geological Sciences, University of Florida, Post Office Box 112120, Gainesville, Florida 32611, USA S. Galeotti 2Istituto di Geologia, Università degli Studi di Urbino, Campus Scientifico, Località Crocicchia, 61029 Urbino, Italy E.E. Martin 3Department of Geological Sciences, University of Florida, Post Office Box 112120, Gainesville, Florida 32611, USA K. Billups 4College of Marine Studies, University of Delaware, 700 Pilottown Road, Lewes, Delaware 19958, USA H.D. Scher 5Department of Geological Sciences, University of Florida, Post Office Box 112120, Gainesville, Florida 32611, USA J.S. Stoner 6Institute of Arctic and Alpine Research (INSTAAR), University of Colorado, Boulder, Colorado 80309, USA Publisher: Geological Society of America Received: 11 Oct 2002 Accepted: 14 Nov 2002 First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2003) 115 (5): 607–623. https://doi.org/10.1130/0016-7606(2003)115<0607:ETMMBA>2.0.CO;2 Article history Received: 11 Oct 2002 Accepted: 14 Nov 2002 First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation J.E.T. Channell, S. Galeotti, E.E. Martin, K. Billups, H.D. Scher, J.S. Stoner; Eocene to Miocene magnetostratigraphy, biostratigraphy, and chemostratigraphy at ODP Site 1090 (sub-Antarctic South Atlantic). GSA Bulletin 2003;; 115 (5): 607–623. doi: https://doi.org/10.1130/0016-7606(2003)115<0607:ETMMBA>2.0.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 SocietyGSA Bulletin Search Advanced Search Abstract At Ocean Drilling Program (ODP) Site 1090 (lat 42°54.8′S, long 8°54.0′E) located in a water depth of 3702 m on the Agulhas Ridge in the sub-Antarctic South Atlantic, ∼300 m of middle Eocene to middle Miocene sediments were recovered with the advanced piston corer (APC) and the extended core barrel (XCB). U-channel samples from the 70–230 meters composite depth (mcd) interval provide a magnetic polarity stratigraphy that is extended to 380 mcd by shipboard whole-core and discrete sample data. The magnetostratigraphy can be interpreted by the fit of the polarity-zone pattern to the geomagnetic polarity time scale (GPTS) augmented by isotope data and bioevents with documented correlation to the GPTS. Three normal-polarity subchrons (C5Dr.1n, C7Ar.1n, and C13r.1n), not included in the standard GPTS, are recorded at Site 1090. The base of the sampled section is correlated to C19n (middle Eocene), although the interpretation is unclear beyond C17r. The top of the sampled section is correlated to C5Cn (late early Miocene), although, in the uppermost 10 m of the sampled section, a foraminifer (Globorotalia sphericomiozea) usually associated with the Messinian and early Pliocene has been identified. 87Sr/86Sr, δ13C, and δ18O values measured on foraminifera, including the δ18O and δ13C shifts close to the Eocene/Oligocene boundary, support the correlation to the GPTS. For the interval spanning the Oligocene/Miocene boundary, benthic δ13C, δ18O, and 87Sr/86Sr records from Site 1090 can be correlated to isotope records from ODP Site 929 (Ceara Rise), providing support for the recently-published Oligocene/Miocene boundary age (22.92 Ma) of Shackleton et al. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.