Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates
This paper presents new results from Optically Stimulated Luminescence (OSL) dating on a sediment core raised from the crest of the Lomonosov Ridge in the central Arctic Ocean. There has been much debate about dating sediment cores from the central Arctic Ocean and by using an independent absolute d...
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ftuninhampshire:oai:scholars.unh.edu:ccom-1988 2023-05-15T14:36:02+02:00 Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates Jakobsson, Martin Backman, Jan Murray, Andrew Lovlie, Reidar 2003-02-15T08:00:00Z application/pdf https://scholars.unh.edu/ccom/988 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1988&context=ccom unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/ccom/988 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1988&context=ccom © 2003 by the Chinese Geophysical Society Center for Coastal and Ocean Mapping Arctic geochronology sedimentation paleoceanography paleomagnetics Oceanography and Atmospheric Sciences and Meteorology text 2003 ftuninhampshire 2023-01-30T21:33:29Z This paper presents new results from Optically Stimulated Luminescence (OSL) dating on a sediment core raised from the crest of the Lomonosov Ridge in the central Arctic Ocean. There has been much debate about dating sediment cores from the central Arctic Ocean and by using an independent absolute dating technique we aim to test whether or not relatively fast, cm-scale/ka, sedimentation rates were typical of Arctic’s Pleistocene depositional mode. On the basis of mainly paleomagnetic reversal stratigraphy, many previous studies suggest mm-scale/ka sedimentation rates. A common feature in these studies is that the first down core paleomagnetic negative inclination is consistently interpreted as the Brunhes/Matuyama boundary at about 780 ka. Our OSL dating results indicate that this assumption is not generally valid, and that the first encountered negative inclination represents younger age excursions within the Brunhes Chron, implying reinterpretation of many published core studies where paleoenvironmental reconstructions have been made for the central Arctic Ocean. Our dating results furthermore corroborates a correlation of the uppermost 2–3 m of the Lomonosov Ridge cores to a well-dated core located off the Barents-Kara Sea margin that in turn is correlated to cores in the Fram Strait. Valuable information on the paleoceanographical evolution in the Arctic Ocean from MIS 6 to the Holocene is given through this correlation of records from the central Arctic Ocean to records off the Eurasian continental margin. Text Arctic Arctic Ocean Fram Strait Kara Sea Lomonosov Ridge University of New Hampshire: Scholars Repository Arctic Arctic Ocean Kara Sea |
institution |
Open Polar |
collection |
University of New Hampshire: Scholars Repository |
op_collection_id |
ftuninhampshire |
language |
unknown |
topic |
Arctic geochronology sedimentation paleoceanography paleomagnetics Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Arctic geochronology sedimentation paleoceanography paleomagnetics Oceanography and Atmospheric Sciences and Meteorology Jakobsson, Martin Backman, Jan Murray, Andrew Lovlie, Reidar Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates |
topic_facet |
Arctic geochronology sedimentation paleoceanography paleomagnetics Oceanography and Atmospheric Sciences and Meteorology |
description |
This paper presents new results from Optically Stimulated Luminescence (OSL) dating on a sediment core raised from the crest of the Lomonosov Ridge in the central Arctic Ocean. There has been much debate about dating sediment cores from the central Arctic Ocean and by using an independent absolute dating technique we aim to test whether or not relatively fast, cm-scale/ka, sedimentation rates were typical of Arctic’s Pleistocene depositional mode. On the basis of mainly paleomagnetic reversal stratigraphy, many previous studies suggest mm-scale/ka sedimentation rates. A common feature in these studies is that the first down core paleomagnetic negative inclination is consistently interpreted as the Brunhes/Matuyama boundary at about 780 ka. Our OSL dating results indicate that this assumption is not generally valid, and that the first encountered negative inclination represents younger age excursions within the Brunhes Chron, implying reinterpretation of many published core studies where paleoenvironmental reconstructions have been made for the central Arctic Ocean. Our dating results furthermore corroborates a correlation of the uppermost 2–3 m of the Lomonosov Ridge cores to a well-dated core located off the Barents-Kara Sea margin that in turn is correlated to cores in the Fram Strait. Valuable information on the paleoceanographical evolution in the Arctic Ocean from MIS 6 to the Holocene is given through this correlation of records from the central Arctic Ocean to records off the Eurasian continental margin. |
format |
Text |
author |
Jakobsson, Martin Backman, Jan Murray, Andrew Lovlie, Reidar |
author_facet |
Jakobsson, Martin Backman, Jan Murray, Andrew Lovlie, Reidar |
author_sort |
Jakobsson, Martin |
title |
Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates |
title_short |
Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates |
title_full |
Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates |
title_fullStr |
Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates |
title_full_unstemmed |
Optically Stimulated Luminescence Dating Supports Central Arctic Ocean CM-scale Sedimentation Rates |
title_sort |
optically stimulated luminescence dating supports central arctic ocean cm-scale sedimentation rates |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2003 |
url |
https://scholars.unh.edu/ccom/988 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1988&context=ccom |
geographic |
Arctic Arctic Ocean Kara Sea |
geographic_facet |
Arctic Arctic Ocean Kara Sea |
genre |
Arctic Arctic Ocean Fram Strait Kara Sea Lomonosov Ridge |
genre_facet |
Arctic Arctic Ocean Fram Strait Kara Sea Lomonosov Ridge |
op_source |
Center for Coastal and Ocean Mapping |
op_relation |
https://scholars.unh.edu/ccom/988 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1988&context=ccom |
op_rights |
© 2003 by the Chinese Geophysical Society |
_version_ |
1766308742332153856 |