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Sedimentary regimes in Arctic's Amerasian and Eurasian Basins: Clues to differences in sedimentation rates

A standard lithostratigraphic model based on cores retrieved 1963–1973 from the ice island T-3 was developed by Clark et al. [Stratigraphy and glacial-marine sediments of the Amerasian Basin, central Arctic Ocean. Geological Society of America Special Paper, 181, 1–57, 1980] for the Amerasian Basin...

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Published in:Global and planetary change 2008-04, Vol.61 (3), p.275-284
Main Authors: Sellén, Emma, Jakobsson, Martin, Backman, Jan
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description A standard lithostratigraphic model based on cores retrieved 1963–1973 from the ice island T-3 was developed by Clark et al. [Stratigraphy and glacial-marine sediments of the Amerasian Basin, central Arctic Ocean. Geological Society of America Special Paper, 181, 1–57, 1980] for the Amerasian Basin of the Arctic Ocean. We have investigated whether or not it is possible to apply this lithostratigraphy to cores from the Lomonosov Ridge, which can be correlated to Eurasian Basin cores, for the purpose of correlating the Amerasian and Eurasian stratigraphies. Published averaged sedimentary proxies from a selected set of T-3 cores are used to correlate with the identical published proxies for the included Lomonosov Ridge cores. The standard lithostratigraphic classification could not be applied to the Lomonosov Ridge cores, which is interpreted to result from differences in sedimentary regimes in the Amerasian and Eurasian Basins. These differences also apply to the barrier between the two basins, the Lomonosov Ridge. The general sedimentation rates are three to four times lower in the Amerasian Basin than in the Eurasian Basin if the first down-core paleomagnetic inclination change is used to correlate between the two basins whereas correlation based on sediment coarse fraction suggests only two times lower rates in the Amerasian Basin.
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subjects Arctic Ocean
Earth sciences
Exogen geovetenskap
Exogenous earth sciences
Geovetenskap
NATURAL SCIENCES
NATURVETENSKAP
sedimentary regimes
sedimentation rates
Sedimentologi
Sedimentology
stratigraphic correlation
stratigraphy
title Sedimentary regimes in Arctic's Amerasian and Eurasian Basins: Clues to differences in sedimentation rates
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