Paleogene glacial history of Antarctica in light of Leg 120 drilling results

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doi: 10.2973/
Author(s): Wise, Sherwood W., Jr.; Breza, James R.; Harwood, David M.; Wei, Wuchang; Zachos, James C.
Author Affiliation(s): Primary:
Fla. State Univ., Dep. Geol., Tallahassee, FL, United States
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
Univ. Mich., United States
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.1001-1030. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 135 refs.; illus. incl. sketch map
Summary: The Paleogene glacial history of Antarctica has been inferred largely from indirect evidence of glaciation gathered from the oceans beyond that continent. This evidence includes the "proxy" stable isotopic record from the world's oceans; the occurrence of ice-rafted debris (IRD) in the southern ocean; inflections in sea-level curves; the presence of hiatuses in the deep-sea record; and changes in clay mineral assemblages, in the diversities of microfossil assemblages, and in the steepness of latitudinal biotic gradients. ODP Leg 120 has added an important dimension to this growing body of evidence through the discovery of lowest Oligocene IRD at Site 740 on the southern Kerguelen Plateau, at a record distance north of the antarctic continent and within a pelagic biosiliceous-carbonate ooze sequence that has yielded a complementary oxygen isotope record of the cryospheric event. The authors deduce that an ice sheet reached sea level during the earliest Oligocene (35.8-36.0 Ma) and that the effect was immediate and profound. In addition to the IRD, this event was manifested at Site 748 by a dramatic cooling of the surface waters surrounding the continent as indicated by a sharp increase in the percentage of cold-water calcareous nannoplankton, an increase in planktonic foraminiferal delta18O values, and an increase in the percentage of biosiliceous material in the sediment. (Auth. mod.)
Year of Publication: 1992
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Ancient ice ages; Antarctica; Cenozoic; Foraminifera; Geomorphology; Glacial geology; Glaciation; Ice rafting; Invertebrata; Isotopes; Kerguelen Plateau; Leg 120; Microfossils; O-18/O-16; Ocean Drilling Program; Oxygen; Paleogene; Protista; Sedimentation; Stable isotopes; Stratigraphy; Tertiary; Transport
Coordinates: S584302 S544838 E0811426 E0762427
Record ID: 1992037063
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States