Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates
Estimates of long-term sedimentation rates derived from total sediment thickness and bedrock ages based on current tectonic models consistently yield cm/ka-scale average sedimentation rates in the central Arctic Ocean, including the Lomonosov Ridge. The physiographic setting of the Arctic Basin is t...
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ftawi:oai:epic.awi.de:13958 2023-09-05T13:15:53+02:00 Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates Backman, J. Moran, K. Moore, T. King, J. Gattacecca, J. Brinkhuis, H. Matthießen, Jens Jakobsson, M. Pälike, H. O´Regan, M. Frank, M. Kubik, P. 2005 https://epic.awi.de/id/eprint/13958/ https://hdl.handle.net/10013/epic.24311 unknown Backman, J. , Moran, K. , Moore, T. , King, J. , Gattacecca, J. , Brinkhuis, H. , Matthießen, J. orcid:0000-0002-6952-2494 , Jakobsson, M. , Pälike, H. , O´Regan, M. , Frank, M. and Kubik, P. (2005) Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates , American Geophysical Fall Meeting, 5-9 Dec., San Francisco, USA. . hdl:10013/epic.24311 EPIC3American Geophysical Fall Meeting, 5-9 Dec., San Francisco, USA. Conference notRev 2005 ftawi 2023-08-22T19:50:53Z Estimates of long-term sedimentation rates derived from total sediment thickness and bedrock ages based on current tectonic models consistently yield cm/ka-scale average sedimentation rates in the central Arctic Ocean, including the Lomonosov Ridge. The physiographic setting of the Arctic Basin is that of a small basin surrounded by huge landmasses since its initial opening during Early Cretaceous times, a setting that has contributed to yield 2-6 km thick sediment deposits on Arctic's abyssal plains. This sedimentation rate scenario is contrasting to the long-held belief that central Arctic Plio-Pleistocene sedimentation rates have been on the mm/ka-scale, or even sub-mm/ka-scale, as estimated from numerous short gravity or piston cores. ACEX drilled through a nearly 410 m thick latest Paleocene to Recent sediment section on the Lomonosov Ridge near 88°N at about 1200 m water depth, with a recovery of 68 %. A combination of paleomagnetic, biostratigraphic and 10-Be data derived from the ACEX cores finally solved the Arctic Basin sedimentation rate ambiguity, in showing an average middle Miocene to Recent rate of about 1.3 cm/ka and Pleistocene rates of nearly 2 cm/ka. The ACEX record is interrupted by a hiatus encompassing the interval between about 17 Ma and 43 Ma. Average middle Eocene through latest Paleocene rates are on the order of about 1.5 cm/ka. Conference Object Arctic Arctic Basin Arctic Arctic Ocean Lomonosov Ridge Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean |
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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 |
Estimates of long-term sedimentation rates derived from total sediment thickness and bedrock ages based on current tectonic models consistently yield cm/ka-scale average sedimentation rates in the central Arctic Ocean, including the Lomonosov Ridge. The physiographic setting of the Arctic Basin is that of a small basin surrounded by huge landmasses since its initial opening during Early Cretaceous times, a setting that has contributed to yield 2-6 km thick sediment deposits on Arctic's abyssal plains. This sedimentation rate scenario is contrasting to the long-held belief that central Arctic Plio-Pleistocene sedimentation rates have been on the mm/ka-scale, or even sub-mm/ka-scale, as estimated from numerous short gravity or piston cores. ACEX drilled through a nearly 410 m thick latest Paleocene to Recent sediment section on the Lomonosov Ridge near 88°N at about 1200 m water depth, with a recovery of 68 %. A combination of paleomagnetic, biostratigraphic and 10-Be data derived from the ACEX cores finally solved the Arctic Basin sedimentation rate ambiguity, in showing an average middle Miocene to Recent rate of about 1.3 cm/ka and Pleistocene rates of nearly 2 cm/ka. The ACEX record is interrupted by a hiatus encompassing the interval between about 17 Ma and 43 Ma. Average middle Eocene through latest Paleocene rates are on the order of about 1.5 cm/ka. |
format |
Conference Object |
author |
Backman, J. Moran, K. Moore, T. King, J. Gattacecca, J. Brinkhuis, H. Matthießen, Jens Jakobsson, M. Pälike, H. O´Regan, M. Frank, M. Kubik, P. |
spellingShingle |
Backman, J. Moran, K. Moore, T. King, J. Gattacecca, J. Brinkhuis, H. Matthießen, Jens Jakobsson, M. Pälike, H. O´Regan, M. Frank, M. Kubik, P. Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates |
author_facet |
Backman, J. Moran, K. Moore, T. King, J. Gattacecca, J. Brinkhuis, H. Matthießen, Jens Jakobsson, M. Pälike, H. O´Regan, M. Frank, M. Kubik, P. |
author_sort |
Backman, J. |
title |
Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates |
title_short |
Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates |
title_full |
Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates |
title_fullStr |
Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates |
title_full_unstemmed |
Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates |
title_sort |
cenozoic ridge crest sediments from the central arctic ocean yield cm/ka-scale sedimentation rates |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/13958/ https://hdl.handle.net/10013/epic.24311 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Basin Arctic Arctic Ocean Lomonosov Ridge |
genre_facet |
Arctic Arctic Basin Arctic Arctic Ocean Lomonosov Ridge |
op_source |
EPIC3American Geophysical Fall Meeting, 5-9 Dec., San Francisco, USA. |
op_relation |
Backman, J. , Moran, K. , Moore, T. , King, J. , Gattacecca, J. , Brinkhuis, H. , Matthießen, J. orcid:0000-0002-6952-2494 , Jakobsson, M. , Pälike, H. , O´Regan, M. , Frank, M. and Kubik, P. (2005) Cenozoic ridge crest sediments from the central Arctic Ocean yield cm/ka-scale sedimentation rates , American Geophysical Fall Meeting, 5-9 Dec., San Francisco, USA. . hdl:10013/epic.24311 |
_version_ |
1776197699862790144 |