Element concentrations of bulk sediment from the Southern Cape Basin

High-resolution records of Ca and Sr were obtained from shipboard XRF analyses of bulk sediments in five gravity cores from the southern Cape Basin, South Atlantic Ocean. Sr/Ca ratios display regular glacial/interglacial variations of 14-40% and reveal a close correlation with the SPECMAP record, mi...

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Bibliographic Details
Main Authors: Wien, Katharina, Kölling, Martin, Schulz, Horst D
Format: Dataset
Language:English
Published: PANGAEA 2005
Subjects:
GeoB2004-3
GeoB8301-6
GeoB8307-6
GeoB8310-2
GeoB8315-6
Gravity corer (Kiel type)
M23/1
M57/1
Meteor (1986)
SL
South African margin
South Atlantic Ocean
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.711655
https://doi.org/10.1594/PANGAEA.711655
Description
Summary:High-resolution records of Ca and Sr were obtained from shipboard XRF analyses of bulk sediments in five gravity cores from the southern Cape Basin, South Atlantic Ocean. Sr/Ca ratios display regular glacial/interglacial variations of 14-40% and reveal a close correlation with the SPECMAP record, minimum Sr/Ca ratios appearing during glacial (delta18 O) maxima, distinct increases during periods of deglaciation, and highest ratios in interstadials. Shifts in carbonate-producing phytoplankton and/or zooplankton assemblages over glacial/interglacial cycles are suggested to be the main cause for the observed variations in Sr/Ca patterns. Quick assessment of the relationship between Sr/Ca ratios and the SPECMAP record made it possible to easily transfer an age model to the newly collected cores already during the cruise.

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