Neogene benthic foraminifers from the southern Indian Ocean (Kerguelen Plateau); biostratigraphy and paleoecology

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doi: 10.2973/odp.proc.sr.120.167.1992
Author(s): Mackensen, Andreas
Author Affiliation(s): Primary:
Alfred Wegener Inst. Polar and Mar. Res., Bremerhaven, Federal Republic of Germany
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
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.649-673. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 67 refs.; illus. incl. 1 table, 5 plates
Summary: Benthic foraminifers were studied quantitatively in 120 Lower Miocene through Upper Pleistocene samples from ODP Sites 747, 748, and 751, Kerguelen Plateau. Principal component analysis on the census data of the most abundant 92 taxa helped to identify 8 benthic foraminifer assemblages. These assemblages were compared with Holocene faunas from southern high latitudes to reconstruct paleoenvironmental conditions. Middle Lower Miocene sediments are characterized by a Uvigerina hispidocostata assemblage, indicating high paleoproductivity and/or not well-ventilated bottom water. From late Early to late Middle Miocene time, the southern Kerguelen Plateau was bathed by a young, well-oxygenated and carbonate-aggressive water mass, as indicated by a Nuttallides umbonifer-dominated assemblage. During late Middle Miocene time, an Astrononion pusillum assemblage took over for only about 1 m.y. The latest Miocene through middle Late Pliocene benthic foraminifer assemblage was characterized by Epistominella exigua and strong carbonate dissolution, indicating very high biosiliceous production, and this in turn may indicate the formation and paleoposition of an Antarctic Polar Frontal Zone. From the late Late Pliocene, a Trifarina angulosa assemblage (indicative today of sandy substrate and vigorous bottom currents) strongly dominated the fauna up to the Late Pleistocene, when Bulimina aculeata became an important and partly dominating constituent of the fauna. This is interpreted as the faunal response to the decreased winnowing force (bottom current velocities) of the Antarctic Circumpolar Current during periods of global climatic amelioration and raised sea level. (Auth. mod.)
Year of Publication: 1992
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Antarctica; Benthic taxa; Biostratigraphy; Cenozoic; Foraminifera; Invertebrata; Kerguelen Plateau; Leg 120; Microfossils; Neogene; ODP Site 747; ODP Site 748; ODP Site 751; Ocean Drilling Program; Paleoecology; Protista; Southern Indian Ocean; Stratigraphy; Tertiary
Coordinates: S544841 S544840 E0764739 E0764738
S582627 S582627 E0785854 E0785853
S574334 S574333 E0794854 E0794853
Record ID: 1992037044
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States