Antarctic Science



Papers—Earth Sciences and Glaciology

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


Norman Hamilton a1 and Carol J. Pudsey a2
a1 School of Ocean and Earth Science, University of Southampton, Southampton Oceanography Centre, Southampton SO14 3ZH, UK
a2 British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK

Article author query
hamilton n   [PubMed][Google Scholar] 
pudsey c   [PubMed][Google Scholar] 

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.

(Received August 17 2000)
(Accepted November 22 2000)


Key Words: environmental magnetic parameters; Quaternary; Scotia Sea; sediments.


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