L'ouverture océanique au sud de la Tasmanie durant le Paléogène et ses conséquences paléocéanographiques : résultats préliminaires de la minéralogie des argiles (leg ODP 189) = Palaeogene ocean opening south of Tasmania, and palaeoceanographic implications: preliminary results of clay mineral analyses (ODP Leg 189)

ODP Leg 189 was designed to test the hypothesis that opening of the Tasmanian Seaway and initiation of circumpolar circulation contributed to the thermal isolation of Antarctica, leading to the development of initial ice-sheet and oceanic thermohaline circulation. The clay assemblages of the Tasmani...

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Bibliographic Details
Published in:Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science
Main Authors: Robert, Christian M., Exon, Neville F., Kennett, James P., Malone, Mitchell J., Brinkhuis, Henk, Chaproniere, George C. H., Ennyu, Atsuhito, Fothergill, Patrick, Fuller, Michael D., Grauert, Marianne, Hill, Peter J., Janecek, Thomas R., Kelly, Daniel Clay, Latimer, Jennifer C., McGonigal Roessig, Kristeen, Nees, Stefan, Ninnemann, Ulysses S., Nürnberg, Dirk, Pekar, Stephen F., Pellaton, Caroline C., Pfühl, Helen A., Röhl, Ursula, Schellenberg, Stephen A., Shevenell, Amelia E., Stickley, Catherine E., Suzuki, Noritoshi, Touchard, Yannick, Wei, Wuchang, White, Timothy S.
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2001
Subjects:
Antarctic
South Tasman Rise
Antarc*
Antarctica
Ice Sheet
Online Access:https://oceanrep.geomar.de/id/eprint/439/
https://oceanrep.geomar.de/id/eprint/439/1/1-s2.0-S1251805001015397-main.pdf
https://doi.org/10.1016/S1251-8050(01)01539-7
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Summary:ODP Leg 189 was designed to test the hypothesis that opening of the Tasmanian Seaway and initiation of circumpolar circulation contributed to the thermal isolation of Antarctica, leading to the development of initial ice-sheet and oceanic thermohaline circulation. The clay assemblages of the Tasmanian region contain the traces of two tectonic stages associated with ocean opening south of the south Tasman Rise near the Palaeocene–Eocene boundary and strike-slip activity between the western Tasmanian land-bridge and Antarctica during the Late Eocene. Earliest Oligocene clays indicate that cooling of Antarctic margins and activity of western boundary circulation progressed with the regional subsidence.

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