Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean)
New sediment cores were recovered along two transects from the Canada Basin across the central Mendeleev Ridge towards the Makarov Basin and the Lomonosov Ridge in the Eurasian Arctic (northern transect along 80°30 N, southern transect along 77°30 N). Here, we present first results from Polarstern A...
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ftawi:oai:epic.awi.de:22435 2024-09-15T17:51:23+00:00 Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) Stein, Rüdiger Matthießen, Jens Niessen, Frank Krylov, A. Nam, S. Bazhenova, Evgenia 2010 application/pdf https://epic.awi.de/id/eprint/22435/ https://epic.awi.de/id/eprint/22435/1/Ste2010b.pdf https://hdl.handle.net/10013/epic.34884 https://hdl.handle.net/10013/epic.34884.d001 unknown https://epic.awi.de/id/eprint/22435/1/Ste2010b.pdf https://hdl.handle.net/10013/epic.34884.d001 Stein, R. orcid:0000-0002-4453-9564 , Matthießen, J. orcid:0000-0002-6952-2494 , Niessen, F. orcid:0000-0001-6453-0594 , Krylov, A. , Nam, S. and Bazhenova, E. (2010) Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) , Polarforschung, 79 (2), pp. 97-121 . hdl:10013/epic.34884 EPIC3Polarforschung, 79(2), pp. 97-121 Article isiRev 2010 ftawi 2024-06-24T04:01:54Z New sediment cores were recovered along two transects from the Canada Basin across the central Mendeleev Ridge towards the Makarov Basin and the Lomonosov Ridge in the Eurasian Arctic (northern transect along 80°30 N, southern transect along 77°30 N). Here, we present first results from Polarstern ARK-XXIII/3 expedition (Aug-Oct 2008). Based on the visual core description, Clarks standard lithological units A to M (CLARK et al. 1980) could also be clearly identified in sediment cores from the northern transect across Mendeleev Ridge. The content of sand-sized material, the prominent pink-white layers, and especially in the upper part of the records the distinct brown/beige colour cycles were considered to be the key sedimentary characteristics used for core correlation and for establishing a tentative age model. Based on this age model, the sediments recovered in cores from the southern transect are younger than Marine Isotope Stage (MIS) 8, whereas the cores from the northern transect also contain sediments probably significantly older than MIS 16. Average sedimentation rates for the time interval MIS 1 to 5 in cores from the northern transect reach values of 0.5-0.9 cm ky-1 (top Mendeleev Ridge and Canadian side), increasing to 1.9-2.4 cm ky-1 at the Makarov Basin side. Along the southern transect, sedimentation rates are significantly higher, reaching 4.2 to >6 cm ky-1. The most distinct pinkish intervals characterized by high numbers of dolomitic ice-rafted debris (IRD) are related to increased IRD supply due to disintegration of an extended Laurentide Ice Sheet during MIS 8 (/7), MIS 5d, and MIS 4/MIS 3. The sand-rich intervals and detrital-carbonate maxima found in the deeper part of the sediment sections from the northern transect may reflect events of IRD input due to disintegration events of the Laurentide Ice Sheet at the end of glacial MIS 8, 10, 12, and 16, a still speculative hypothesis that has to be approved by further studies. A diamicton with erosional structures at its base was identified on ... Article in Journal/Newspaper Arctic Arctic Ocean canada basin Ice Sheet Lomonosov Ridge makarov basin Polarforschung Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
New sediment cores were recovered along two transects from the Canada Basin across the central Mendeleev Ridge towards the Makarov Basin and the Lomonosov Ridge in the Eurasian Arctic (northern transect along 80°30 N, southern transect along 77°30 N). Here, we present first results from Polarstern ARK-XXIII/3 expedition (Aug-Oct 2008). Based on the visual core description, Clarks standard lithological units A to M (CLARK et al. 1980) could also be clearly identified in sediment cores from the northern transect across Mendeleev Ridge. The content of sand-sized material, the prominent pink-white layers, and especially in the upper part of the records the distinct brown/beige colour cycles were considered to be the key sedimentary characteristics used for core correlation and for establishing a tentative age model. Based on this age model, the sediments recovered in cores from the southern transect are younger than Marine Isotope Stage (MIS) 8, whereas the cores from the northern transect also contain sediments probably significantly older than MIS 16. Average sedimentation rates for the time interval MIS 1 to 5 in cores from the northern transect reach values of 0.5-0.9 cm ky-1 (top Mendeleev Ridge and Canadian side), increasing to 1.9-2.4 cm ky-1 at the Makarov Basin side. Along the southern transect, sedimentation rates are significantly higher, reaching 4.2 to >6 cm ky-1. The most distinct pinkish intervals characterized by high numbers of dolomitic ice-rafted debris (IRD) are related to increased IRD supply due to disintegration of an extended Laurentide Ice Sheet during MIS 8 (/7), MIS 5d, and MIS 4/MIS 3. The sand-rich intervals and detrital-carbonate maxima found in the deeper part of the sediment sections from the northern transect may reflect events of IRD input due to disintegration events of the Laurentide Ice Sheet at the end of glacial MIS 8, 10, 12, and 16, a still speculative hypothesis that has to be approved by further studies. A diamicton with erosional structures at its base was identified on ... |
format |
Article in Journal/Newspaper |
author |
Stein, Rüdiger Matthießen, Jens Niessen, Frank Krylov, A. Nam, S. Bazhenova, Evgenia |
spellingShingle |
Stein, Rüdiger Matthießen, Jens Niessen, Frank Krylov, A. Nam, S. Bazhenova, Evgenia Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) |
author_facet |
Stein, Rüdiger Matthießen, Jens Niessen, Frank Krylov, A. Nam, S. Bazhenova, Evgenia |
author_sort |
Stein, Rüdiger |
title |
Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) |
title_short |
Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) |
title_full |
Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) |
title_fullStr |
Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) |
title_full_unstemmed |
Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) |
title_sort |
towards a better (litho-) stratigraphy and reconstruction of quaternary paleoenvironment in the amerasian basin (arctic ocean) |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/22435/ https://epic.awi.de/id/eprint/22435/1/Ste2010b.pdf https://hdl.handle.net/10013/epic.34884 https://hdl.handle.net/10013/epic.34884.d001 |
genre |
Arctic Arctic Ocean canada basin Ice Sheet Lomonosov Ridge makarov basin Polarforschung |
genre_facet |
Arctic Arctic Ocean canada basin Ice Sheet Lomonosov Ridge makarov basin Polarforschung |
op_source |
EPIC3Polarforschung, 79(2), pp. 97-121 |
op_relation |
https://epic.awi.de/id/eprint/22435/1/Ste2010b.pdf https://hdl.handle.net/10013/epic.34884.d001 Stein, R. orcid:0000-0002-4453-9564 , Matthießen, J. orcid:0000-0002-6952-2494 , Niessen, F. orcid:0000-0001-6453-0594 , Krylov, A. , Nam, S. and Bazhenova, E. (2010) Towards a better (litho-) stratigraphy and reconstruction of Quaternary paleoenvironment in the Amerasian Basin (Arctic Ocean) , Polarforschung, 79 (2), pp. 97-121 . hdl:10013/epic.34884 |
_version_ |
1810293262854914048 |