Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean ...

Sr and Nd isotopic compositions of Late Quaternary surface sediment and sediment cores from the south Atlantic and southeast Pacific sectors of the Southern Ocean are used to constrain the provenance and transport mechanisms of their terrigenous component. We report isotopic and mineralogical data f...

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Bibliographic Details
Main Authors: Walter, Hans-Jürgen, Hegner, Ernst, Diekmann, Bernhard, Kuhn, Gerhard, Rutgers van der Loeff, Michiel M
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2000
Subjects:
Box corer
Giant box corer
Gravity corer Kiel type
Piston corer BGR type
MultiCorer
Sampling by hand
ANTARTIDA8611
ANT-I/2
ANT-V/4
ANT-VI/2
ANT-X/5
ANT-XI/2
ANT-XII/4
ANT-XIV/3
Nuevo Alcocero
Polarstern
Marine Geochemistry @ AWI AWI_MarGeoChem
Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo
Mid-Atlantic Ridge
Pacific
Scotia Sea
Southern Ocean
South Atlantic Ocean
Online Access:https://dx.doi.org/10.1594/pangaea.735071
https://doi.pangaea.de/10.1594/PANGAEA.735071
Description
Summary:Sr and Nd isotopic compositions of Late Quaternary surface sediment and sediment cores from the south Atlantic and southeast Pacific sectors of the Southern Ocean are used to constrain the provenance and transport mechanisms of their terrigenous component. We report isotopic and mineralogical data for core samples from three localities, the Mid-Atlantic Ridge at 41°S and the northern and southern Scotia Sea. In addition, data for surface sediment samples from the south Atlantic and southeast Pacific sectors of the Southern Ocean are presented. The variations of Sr and Nd isotopic compositions of the bulk sediment samples in all cores were correlated with the magnetic susceptibility of the sediment and with the inferred glacial-interglacial stages. The isotopic data indicate that, during glacial periods, sediment was delivered from continental crust with a shorter residence time than that supplying material during interglacial periods. At the core site near the Mid-Atlantic Ridge, Nd isotopic, combined with ... : Supplement to: Walter, Hans-Jürgen; Hegner, Ernst; Diekmann, Bernhard; Kuhn, Gerhard; Rutgers van der Loeff, Michiel M (2000): Provenance and transport of terrigenous sediment in the South Atlantic Ocean and their relations to glacial and interglacial cycles: Nd and Sr isotopic evidence. Geochimica et Cosmochimica Acta, 64(22), 3813-3827 ...

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