Mid-Pliocene polarity zones of ODP Site 177-1092 (Table 2), supplement to: Andersson, Carin; Warnke, Detlef A; Channell, James E T; Stoner, Joseph S; Jansen, Eystein (2002): The mid-Pliocene (4.3-2.6 Ma) benthic stable isotope record of the Southern Ocean: ODP Sites 1092 and 704, Meteor Rise. Palaeogeography, Palaeoclimatology, Palaeoecology, 182(3-4), 165-181

We present mid-Pliocene (4.3-2.6 Ma) benthic stable oxygen and carbon isotope data from Ocean Drilling Program Site 1092 (ODP Leg 177) drilled in the sub-Antarctic sector of the Southern Ocean. The results are compared with the stable isotope results from nearby Site 704 (ODP Leg 114). Oxygen isotop...

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Bibliographic Details
Main Authors: Andersson, Carin, Warnke, Detlef A, Channell, James E T, Stoner, Joseph S, Jansen, Eystein
Format: Dataset
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2002
Subjects:
DEPTH, sediment/rock
Chronozone
Age model
Composite Core
Leg177
Joides Resolution
Ocean Drilling Program ODP
Antarctic
Southern Ocean
Pacific
Warnke
Antarc*
Antarctica
NADW
North Atlantic Deep Water
North Atlantic
Online Access:https://dx.doi.org/10.1594/pangaea.706311
https://doi.pangaea.de/10.1594/PANGAEA.706311
Description
Summary:We present mid-Pliocene (4.3-2.6 Ma) benthic stable oxygen and carbon isotope data from Ocean Drilling Program Site 1092 (ODP Leg 177) drilled in the sub-Antarctic sector of the Southern Ocean. The results are compared with the stable isotope results from nearby Site 704 (ODP Leg 114). Oxygen isotope data show that minimum values are about 0.5 per mil less than those of the Holocene, which is consistent with the results from Site 704, indicating only minor deglaciation of Antarctica during the studied interval. Oxygen isotope data from both Site 1092 and Site 704 are slightly higher relative to Pacific values during several intervals which could be related to the contribution of warm, saline North Atlantic Deep Water (NADW). Comparisons of benthic carbon isotope gradients between sites located in the North Atlantic, sub-Antarctic sector of the Southern Ocean, and Pacific indicate that at times, the gradient between the Southern Ocean and the Pacific evolved differently than the Atlantic-Pacific gradient. This suggests that variations in NADW strength alone might not be responsible for the observed carbon isotope values in the Southern Ocean.

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