Age models, isotopes, and calcium carbonate of two sediment cores from the Southern Ocean ...

We used benthic foraminiferal assemblages and the stable carbon isotopic composition of benthic foraminiferal tests to interpret glacial-to-interglacial contrasts in two gravity cores from the lower bathyal Antarctic continental margin at 69°S, and the abyssal Agulhas Basin at 43°S. As a Recent anal...

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Bibliographic Details
Main Authors: Mackensen, Andreas, Grobe, Hannes, Hubberten, Hans-Wolfgang, Kuhn, Gerhard
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 1994
Subjects:
Gravity corer Kiel type
ANT-V/4
ANT-IX/4
Polarstern
Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo
South Atlantic in Late Quaternary Reconstruction of Budget and Currents SFB261
Antarc*
Antarctic
Southern Ocean
Weddell Sea
Online Access:https://dx.doi.org/10.1594/pangaea.728863
https://doi.pangaea.de/10.1594/PANGAEA.728863
Description
Summary:We used benthic foraminiferal assemblages and the stable carbon isotopic composition of benthic foraminiferal tests to interpret glacial-to-interglacial contrasts in two gravity cores from the lower bathyal Antarctic continental margin at 69°S, and the abyssal Agulhas Basin at 43°S. As a Recent analogue, sediment surface samples from an eastern Atlantic Ocean and Weddell Sea transect between 20° and 70°S were discussed. In the investigated area, the benthic foraminiferal assemblages reflect both the ocean circulation and surface productivity. Also at most stations from a belt with seasonally high surface productivity between 48°S and 55°S, the d13C values of epibenthic Cibicidoides, including F. wuellerstorfi are depleted relative to the d13CsumCO2 of the bottom water and hence do not follow the 1:1 relationship established from more northern areas. This bears implications for the interpretation of large glacial/interglacial d13C shifts from the Southern Ocean: Significant parts of this shift can be caused ... : Supplement to: Mackensen, Andreas; Grobe, Hannes; Hubberten, Hans-Wolfgang; Kuhn, Gerhard (1994): Benthic foraminiferal assemblages and the d13C-signal in the atlantic sector of the Southern Ocean: glacial-to-interglacial contrasts. In: Zahn, R; Pederson, T F; Kaminiski, M A & Labeyrie, L (eds.), Carbon cycling in the glacial ocean: constraints on the ocean's role in global change, Springer-Verlag, Berlin, Heidelberg, NATO ASI Series I17, 105-144 ...

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