Sedimentation rates in the Makarov Basin, central Arctic Ocean: A paleomagnetic and rock magnetic approach

Nowaczyk, Norbert R., Frederichs, Thomas W., Kassens, Heidemarie, Nørgaard-Pedersen, Nils, Spielhagen, Robert F., Stein, Rüdiger and Weiel, Dominik (2001) Sedimentation rates in the Makarov Basin, central Arctic Ocean: A paleomagnetic and rock magnetic approach Paleoceanography, 16 (4). pp. 368-389. DOI 10.1029/2000PA000521.

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Three long sediment cores from the Makarov Basin have been subjected to detailed paleomagnetic and rock magnetic analyses. Investigated sediments are dominated by normal polarity including short reversal excursions, indicating that most of the sediments are of Brunhes age. In general, the recovered sediments show only low to moderate variability in concentration and grain size of the remanence-carrying minerals. Estimations of relative paleointensity variations yielded a well-documented succession of pronounced lows and highs that could be correlated to published reference curves. However, together with five accelerator mass spectrometry C-14 ages and an incomplete Be-10 record, still two different interpretations of the paleomagnetic data are possible, with long-term sedimentation rates of either 1.3 or 4 cm kyr(-1) However, both models implicate highly variable sedimentation rates of up to 10 cm kyr(-1), and abrupt changes in rock magnetic parameters might even indicate several hiatuses.

Document Type: Article
Additional Information: WOS:000169950700004
Keywords: High-resolution magnetostratigraphy; Relative Paleointensity data; Geomagnetic polarity events; Greenland Sea; Mono age calibration; North Atlantic; Lashamp Field; KA
Research affiliation: AWI
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
DOI etc.: 10.1029/2000PA000521
ISSN: 0883-8305
Date Deposited: 14 Jan 2015 09:54
Last Modified: 10 May 2017 13:19

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