Arctic Ocean manganese contents and sediment colour cycles
Cyclical variations in colour and manganese content in sediments from the central Arctic Ocean have been interpreted to represent climatically controlled changes in the input of Mn from the Siberian hinterland, and/or variations in the intermediate and deep water ventilation of the Arctic basins, al...
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Norwegian Polar Institute
2008
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ftjpolarres:oai:journals.openacademia.net:article/2876 2023-05-15T14:24:18+02:00 Arctic Ocean manganese contents and sediment colour cycles Löwemark, Ludvig Jakobsson, Martin Mörth, Magnus Backman, Jan 2008-08-01 application/pdf https://polarresearch.net/index.php/polar/article/view/2876 https://doi.org/10.3402/polar.v27i2.6169 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2876/6503 https://polarresearch.net/index.php/polar/article/view/2876 doi:10.3402/polar.v27i2.6169 Copyright (c) 2018 Polar Research Polar Research; Vol. 27 No. 2 (2008): Special issue: Arctic Palaeoclimate and its Extremes (APEX); 105-113 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2008 ftjpolarres https://doi.org/10.3402/polar.v27i2.6169 2021-11-11T19:13:21Z Cyclical variations in colour and manganese content in sediments from the central Arctic Ocean have been interpreted to represent climatically controlled changes in the input of Mn from the Siberian hinterland, and/or variations in the intermediate and deep water ventilation of the Arctic basins, although a diagenetic origin has not been excluded. A reinvestigation of core 96/12-1pc using an Itrax X-ray fluoresence (XRF) core scanner confirms that these colour cycles are indeed controlled by variations in Mn content, although changes in the source region of the sediment may override the Mn colour signal in certain intervals. The prominent Mn cycles show no correspondence to any of the other measured elements. This decoupling of Mn and the bulk chemistry of the sediment is taken to indicate that the cycles observed are caused by variations in water column ventilation and riverine input, rather than variations in sediment source or diagenesis. We therefore conclude that the Mn maxima do represent warm phases with increased ventilation and/or riverine input, and that they therefore could be used for chronostratigraphic correlation between cores from the central Arctic Ocean, where traditional isotope stratigraphy is difficult or impossible to establish because of the lack of calcareous microfossils. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Polar Research Polar Research (E-Journal) Arctic Arctic Ocean Polar Research 27 2 |
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Open Polar |
collection |
Polar Research (E-Journal) |
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ftjpolarres |
language |
English |
description |
Cyclical variations in colour and manganese content in sediments from the central Arctic Ocean have been interpreted to represent climatically controlled changes in the input of Mn from the Siberian hinterland, and/or variations in the intermediate and deep water ventilation of the Arctic basins, although a diagenetic origin has not been excluded. A reinvestigation of core 96/12-1pc using an Itrax X-ray fluoresence (XRF) core scanner confirms that these colour cycles are indeed controlled by variations in Mn content, although changes in the source region of the sediment may override the Mn colour signal in certain intervals. The prominent Mn cycles show no correspondence to any of the other measured elements. This decoupling of Mn and the bulk chemistry of the sediment is taken to indicate that the cycles observed are caused by variations in water column ventilation and riverine input, rather than variations in sediment source or diagenesis. We therefore conclude that the Mn maxima do represent warm phases with increased ventilation and/or riverine input, and that they therefore could be used for chronostratigraphic correlation between cores from the central Arctic Ocean, where traditional isotope stratigraphy is difficult or impossible to establish because of the lack of calcareous microfossils. |
format |
Article in Journal/Newspaper |
author |
Löwemark, Ludvig Jakobsson, Martin Mörth, Magnus Backman, Jan |
spellingShingle |
Löwemark, Ludvig Jakobsson, Martin Mörth, Magnus Backman, Jan Arctic Ocean manganese contents and sediment colour cycles |
author_facet |
Löwemark, Ludvig Jakobsson, Martin Mörth, Magnus Backman, Jan |
author_sort |
Löwemark, Ludvig |
title |
Arctic Ocean manganese contents and sediment colour cycles |
title_short |
Arctic Ocean manganese contents and sediment colour cycles |
title_full |
Arctic Ocean manganese contents and sediment colour cycles |
title_fullStr |
Arctic Ocean manganese contents and sediment colour cycles |
title_full_unstemmed |
Arctic Ocean manganese contents and sediment colour cycles |
title_sort |
arctic ocean manganese contents and sediment colour cycles |
publisher |
Norwegian Polar Institute |
publishDate |
2008 |
url |
https://polarresearch.net/index.php/polar/article/view/2876 https://doi.org/10.3402/polar.v27i2.6169 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Polar Research |
genre_facet |
Arctic Arctic Arctic Ocean Polar Research |
op_source |
Polar Research; Vol. 27 No. 2 (2008): Special issue: Arctic Palaeoclimate and its Extremes (APEX); 105-113 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2876/6503 https://polarresearch.net/index.php/polar/article/view/2876 doi:10.3402/polar.v27i2.6169 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v27i2.6169 |
container_title |
Polar Research |
container_volume |
27 |
container_issue |
2 |
_version_ |
1766296730404388864 |