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Magnetic properties of Upper Quaternary sediments from the Scotia Sea, Antarctica

Published online by Cambridge University Press:  27 April 2004

Norman Hamilton  and
Carol J. Pudsey
Norman Hamilton
Affiliation:
School of Ocean and Earth Science, University of Southampton, Southampton Oceanography Centre, Southampton SO14 3ZH, UK
Carol J. Pudsey
Affiliation:
British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK
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Abstract

Magnetic properties of bulk sediment samples taken from three cores from the Scotia Sea, Antarctica were determined using a fully-automated variable field translation balance. Fine-grained detrital magnetite is identified as the principal carrier of remanence in these Upper Quaternary sediments which were deposited under the influence of the Antarctic Circumpolar Current. Inferred magnetite grain-size is consistent with published bulk grain-size data for these cores. Pseudo-single domain grains characterize Holocene samples, and larger, multi-domain grains occur in glacial samples from two of the cores, whereas samples from the northernmost core site show dominantly multi-domain behaviour.

Keywords

environmental magnetic parametersQuaternaryScotia Seasediments
Type
Papers—Earth Sciences and Glaciology
Information
Antarctic Science , Volume 13 , Issue 1 , March 2001 , pp. 61 - 66
Copyright
© Antarctic Science Ltd 2001

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