HR: 0800h
AN: PP51D-1353    [Abstracts]
TI: The early Eocene in the Southern Ocean; an integrated dinocyst and geochemical analysis of ODP Leg 189 sites 1171 and 1172, Tasman Sea.
AU: Deltrap, R
EM: R_deltrap@hotmail.com
AF: Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, Utrecht, 3584CD Netherlands
AU: Roehl, U
EM: uroehl@marum.de
AF: Geosciences Department, Bremen University, Postfach 330440, Klagenfurter Strasse, Bremen, 28334 Germany
AU: Brinkhuis, H
EM: H.Brinkhuis@bio.uu.nl
AF: Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, Utrecht, 3584CD Netherlands
AU: * Sluijs, A
EM: A.Sluijs@bio.uu.nl
AF: Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, Utrecht, 3584CD Netherlands
AB: The early Eocene is known as the warmest and most extreme long-term greenhouse interval of the Cenozoic. Superimposed on these conditions, short-lived 'hyperthermal' events, apparently caused by the fast input of carbon in the ocean-atmosphere system, are associated with dramatic changes in ocean chemistry, the global hydrological cycle and bio-provincialism and evolution. The `Paleocene/Eocene Thermal Maximum' or PETM event (55 Ma) is the most extreme hyperthermal event, but recently similar events within this time period have been identified. Many relatively complete late Paleocene through early Eocene sequences have by now been reported from around the world, but most are from ancient low- to mid-latitude sites. ODP Leg 189 in the Tasman Sea recovered the southernmost successions ever encountered from this critical phase in Earth's history at the marginal marine Sites 1171 and 1172 (at 70\deg to 65\deg S paleolatitude). On the basis of more detailed investigations of downhole and core logging data, in combination with bio- (dinocysts) magnetostratigraphy and organic stable isotope geochemistry, we have identified the PETM, and possibly also the younger Elmo event (see Sluijs et al., AGU fall meeting abstract volume 2004) and provide correlation and analysis of the late Paleocene through early Eocene in terms of completeness and paleoenvironment.
DE: 4806 Carbon cycling
DE: 4267 Paleoceanography
DE: 1620 Climate dynamics (3309)
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2004 AGU Fall Meeting