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Paleomagnetic Constraints on Sedimentation Rates in the Eastern Arctic Ocean

Published online by Cambridge University Press:  20 January 2017

David A. Schneider ,
Jan Backman ,
William B. Curry  and
Göran Possnert
David A. Schneider
Affiliation:
Scientific American, 415 Madison Ave. New York, New York, 10017
Jan Backman
Affiliation:
Department of Geology and Geochemistry, University of Stockholm, S106-91, Stockholm, Sweden
William B. Curry
Affiliation:
Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, 02543
Göran Possnert
Affiliation:
The Sveberg Laboratory, Uppsala University, S751-21, Uppsala, Sweden
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Abstract

Deep-sea sediments recovered from six sites visited during the International Arctic Ocean Expedition of 1991 were examined to determine sedimentation rates in the eastern Arctic Ocean basin. The dearth of age-diagnostic biogenic material in these sediments precludes the application of biostratigraphic methods, but ages can be deduced using paleomagnetism, in conjunction with measurements of radiocarbon and carbonate concentration. Although no one of these techniques gives an unambiguous determination of age, the interpretation most consistent with these diverse data implies that sedimentation rates in the eastern Arctic are, in general, a few centimeters per thousand years. Such estimates of sedimentation rate are an order of magnitude greater than those previously determined from many sediment cores taken from the Canada Basin. However, one site examined on the Morris Jesup Rise shows a relatively low rate of sediment accumulation (less than 0.6 cm/103 yr) suggesting that, although higher than in the Canada Basin, sedimentation rates in the eastern Arctic can be highly variable.

Type
Research Article
Information
Quaternary Research , Volume 46 , Issue 1 , July 1996 , pp. 62 - 71
Copyright
University of Washington

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