Geochemical measurements of the Tasmanian Gateway from ODP Hole 189-1172A ...

Tectonic changes that produced a deep Tasmanian Gateway between Australia and Antarctica are widely invoked as the major mechanism for Antarctic cryosphere growth and Antarctic Circumpolar Current (ACC) development during the Eocene/Oligocene (E/O) transition (34-33 Ma). Ocean Drilling Program (ODP)...

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Bibliographic Details
Main Authors: Stickley, Catherine E, Brinkhuis, Henk, Schellenberg, Stephen A, Sluijs, Appy, Röhl, Ursula, Fuller, Michael D, Grauert, M, Huber, Matthew, Warnaar, Jeroen, Wiliams, Graham L
Format: Dataset
Language:English
Published: PANGAEA 2004
Subjects:
DEPTH, sediment/rock
Grain size, mean
Carbonates
Carbon, organic, total
δ18O, carbonate
δ13C, carbonate
Drilling/drill rig
Coulometry
Isotope ratio mass spectrometry
Leg189
Joides Resolution
Ocean Drilling Program ODP
Antarc*
Antarctic
Antarctica
Online Access:https://dx.doi.org/10.1594/pangaea.742605
https://doi.pangaea.de/10.1594/PANGAEA.742605
Description
Summary:Tectonic changes that produced a deep Tasmanian Gateway between Australia and Antarctica are widely invoked as the major mechanism for Antarctic cryosphere growth and Antarctic Circumpolar Current (ACC) development during the Eocene/Oligocene (E/O) transition (34-33 Ma). Ocean Drilling Program (ODP) Leg 189 recovered near-continuous marine sedimentary records across the E/O transition interval at four sites around Tasmania. These records are largely barren of calcareous microfossils but contain a rich record of siliceous- and organic-walled marine microfossils. In this study we integrate micropaleontological, sedimentological, geochemical, and paleomagnetic data from Site 1172 (East Tasman Plateau) to identify four distinct phases (A-D) in the E/O Tasmanian Gateway deepening that are correlative among ODP Leg 189 sites. Phase A, prior to 35.5 Ma: minor initial deepening characterized by a shallow marine prodeltaic setting with initial condensation episodes. Phase B, 35.5-33.5 Ma: increased deepening marked ... : Supplement to: Stickley, Catherine E; Brinkhuis, Henk; Schellenberg, Stephen A; Sluijs, Appy; Fuller, Michael D; Grauert, M; Röhl, Ursula; Warnaar, Jeroen; Wiliams, Graham L (2004): Timing and nature of the deepening of the Tasmanian Gateway. Paleoceanography, 19(4), PA4026 ...

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