Isotope and trace element geochemistry of Eocene and Oligocene foraminifers from Site 748, Kerguelen Plateau

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doi: 10.2973/odp.proc.sr.120.183.1992
Author(s): Zachos, James C.; Berggren, William A.; Aubry, Marie-Pierre; Mackensen, Andreas
Author Affiliation(s): Primary:
Univ. Mich., Dep. Geol. Sci., Ann Arbor, MI, United States
Other:
Univ. Louis Pasteur, France
Ocean Drill. Program, United States
Univ. Claude Bernard, France
Woods Hole Oceanogr. Inst., United States
Rühr Univ. Bochum, Federal Republic of Germany
Britoil, United Kingdom
Bur. Mineral Resour., Geol. and Geophys., Australia
Ohio State Univ., United States
Univ. Toronto, Canada
Univ. Nebr., United States
Brown Univ., United States
Kobe Univ., Japan
EAWANG/ETH, Switzerland
Alfred Wegener Inst. Polar and Mar. Res., Federal Republic of Germany
Tohoku Univ., United States
Univ. R.I., United States
Aust. Antarct. Div., Australia
Lamont-Doherty Geol. Obs., United States
Mass. Inst. Technol., United States
Univ. Leicester, United Kingdom
Kyoto Univ., Japan
Alfred-Wegener-Inst. Polar und Meeresforschung, Federal Republic of Germany
Volume Title: Proceedings of the Ocean Drilling Program, Central Kerguelen Plateau; covering Leg 120 of the cruises of the drilling vessel JOIDES Resolution, Fremantle, Australia, to Fremantle, Australia, sites 747-751, 20 February to 30 April 1988; Part 2
Volume Author(s): Wise, Sherwood W., Jr.; Schlich, Roland; Palmer Julson, Amanda A.; Aubry, Marie-Pierre; Berggren, William A.; Bitschene, Peter Rene; Blackburn, Neal A.; Breza, James R.; Coffin, Millard F.; Harwood, David M.; Heider, Franz; Holmes, Mary Anne; Howard, William R.; Inokuchi, Hiroo; Kelts, Kerry; Lazarus, David B.; Mackensen, Andreas; Maruyama, Toshiaki; Munschy, Marc; Pratson, Elizabeth Lewis; Quilty, Patrick G.; Rack, Frank R.; Salters, Vincent J. M.; Sevigny, James H.; Storey, Michael; Takemura, Atsushi; Watkins, David K.; Whitechurch, Hubert; Zachos, James; Barbu, Eva M.
Source: Proceedings of the Ocean Drilling Program, Central Kerguelen Plateau; covering Leg 120 of the cruises of the drilling vessel JOIDES Resolution, Fremantle, Australia, to Fremantle, Australia, sites 747-751, 20 February to 30 April 1988; Part 2, Sherwood W. Wise, Jr., Roland Schlich, Amanda A. Palmer Julson, Marie-Pierre Aubry, William A. Berggren, Peter Rene Bitschene, Neal A. Blackburn, James R. Breza, Millard F. Coffin, David M. Harwood, Franz Heider, Mary Anne Holmes, William R. Howard, Hiroo Inokuchi, Kerry Kelts, David B. Lazarus, Andreas Mackensen, Toshiaki Maruyama, Marc Munschy, Elizabeth Lewis Pratson, Patrick G. Quilty, Frank R. Rack, Vincent J. M. Salters, James H. Sevigny, Michael Storey, Atsushi Takemura, David K. Watkins, Hubert Whitechurch, James Zachos and Eva M. Barbu. Proceedings of the Ocean Drilling Program, Scientific Results, Vol.120, p.839-854. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 72 refs.; illus. incl. 5 tables, sketch map
Summary: Stable carbon and oxygen isotope analyses were conducted on well-preserved planktonic and benthic foraminifers from a continuous Middle Eocene to Oligocene sequence at ODP Site 748 on the Kerguelen Plateau. Benthic foraminifer delta18O values show a 1.0 per mill increase through the Middle and Upper Eocene, followed by a rapid 1.2 per mill increase in the lowermost Oligocene (35.5 Ma). Surface-dwelling planktonic foraminifer delta18O values increase in the lowermost Oligocene, but only by 0.6 per mill whereas intermediate-depth planktonic foraminifers show an increase of about 1.0 per mill. Benthic foraminifer delta13C values increase by 0.9 per mill in the lowermost Oligocene at precisely the same time as the large delta18O increase, whereas planktonic foraminifer delta13C values show little or no change. Site 748 oxygen isotope and paleontological records suggest that southern Indian Ocean surface and intermediate waters underwent significant cooling from the Early to Late Eocene. Records indicate that 0.3 to 0.4 per mill of the Early Oligocene delta18O increase was ice-volume related. (Auth. mod.)
Year of Publication: 1992
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Antarctica; C-13/C-12; Carbon; Cenozoic; Foraminifera; Geochemistry; Indian Ocean; Indicators; Invertebrata; Isotopes; Kerguelen Plateau; Leg 120; Microfossils; O-18/O-16; ODP Site 748; Ocean Drilling Program; Oxygen; Paleoclimatology; Paleoecology; Paleogene; Protista; Stable isotopes; Tertiary; Trace elements
Coordinates: S582627 S582627 E0785853 E0785853
Record ID: 1992037052
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States