Touchard, Yannick and Fuller, Michael (2004): Magnetostratigraphy of the Pliocene-Pleistocene sequence and of the Eocene-Oligocene transition at ODP Leg 189 Hole 1168

Leg/Site/Hole:
ODP 189
ODP 189 1168
Identifier:
2005-035025
georefid
Creator:
Touchard, Yannick
University of Hawaii at Manoa, Hawaii Institute of Geophysics and Planetology, Honolulu, HI, United States
author
Fuller, Michael
University of California at Santa Barbara, United States
author
Identification:
Magnetostratigraphy of the Pliocene-Pleistocene sequence and of the Eocene-Oligocene transition at ODP Leg 189 Hole 1168
2004
In: Exon, Neville F. (editor), Kennett, James P. (editor), Malone, Mitchell (editor), The Cenozoic Southern Ocean; tectonics, sedimentation, and climate change between Australia and Antarctica
American Geophysical Union, Washington, DC, United States
151
79-92
The magnetostratigraphy of the Cenozoic at Site 1168 is based upon the composite study of onboard long-core measurements and of 532 additional discrete samples from the Eocene-Oligocene sequence measured onshore. Rock magnetism experiments indicate that the magnetic mineralogy does not vary down-hole and is mainly represented by coarse detrital grains from the (titano)magnetite series. Alternating field demagnetization up to 120 mT was used to separate the magnetic component from the discrete samples. An interpretation is also proposed for the overlying magnetozones, although they are not easily correlated with the expected upper Oligocene magnetostratigraphic framework. This study helps to the constraint on the timing of the Cenozoic evolution of the climatic system form "Green-house" to "Ice-house" conditions which marks the final tectonic separation of Australia from Antarctica. (modif. j. abstr.)
English
Serial
Coverage:Geographic coordinates:
North:-42.3600
West:144.2400East: 144.2500
South:-42.3700
Stratigraphy; algae; alternating field demagnetization; anhysteretic remanent magnetization; Antarctic Circumpolar Current; biostratigraphy; Cenozoic; characteristic remanent magnetization; chronostratigraphy; demagnetization; Dinoflagellata; Eocene; Foraminifera; greenhouse effect; icehouse effect; Invertebrata; isothermal remanent magnetization; Leg 189; lower Oligocene; magnetic minerals; magnetization; magnetostratigraphy; microfossils; nannofossils; natural remanent magnetization; Neogene; Ocean Drilling Program; ODP Site 1168; Oligocene; oxides; paleoclimatology; Paleogene; paleomagnetism; palynomorphs; Plantae; plate divergence; Pleistocene; Pliocene; primary magnetization; Protista; Quaternary; remanent magnetization; Southern Ocean; stratigraphic boundary; Tasmanian Gateway; Tertiary; titanomagnetite; upper Eocene; viscous remanent magnetization;
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