Seismic stratigraphy and sediment thickness of the Nansen Basin, Arctic Ocean
A Norwegian expedition to the western Nansen Basin, Yermak Plateau and the Hinlopen margin in 2001 acquired about 1100 km of 2-D multichannel seismic profiles and 50 wide-angle sonobuoy record sections. Analysis of these data establishes a regional seismic stratigraphic framework for the western Nan...
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2009
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fthighwire:oai:open-archive.highwire.org:gji:176/3/805 2023-05-15T15:07:52+02:00 Seismic stratigraphy and sediment thickness of the Nansen Basin, Arctic Ocean Engen, Øyvind Gjengedal, Jakob Andreas Faleide, Jan Inge Kristoffersen, Yngve Eldholm, Olav 2009-03-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/176/3/805 https://doi.org/10.1111/j.1365-246X.2008.04028.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/176/3/805 http://dx.doi.org/10.1111/j.1365-246X.2008.04028.x Copyright (C) 2009, Oxford University Press Seismology TEXT 2009 fthighwire https://doi.org/10.1111/j.1365-246X.2008.04028.x 2013-05-28T10:27:31Z A Norwegian expedition to the western Nansen Basin, Yermak Plateau and the Hinlopen margin in 2001 acquired about 1100 km of 2-D multichannel seismic profiles and 50 wide-angle sonobuoy record sections. Analysis of these data establishes a regional seismic stratigraphic framework for the western Nansen Basin integrating previously published stratigraphic schemes. P -wave velocities and sediment thickness were derived within 7–8 per cent uncertainty from 2-D seismic ray tracing models of each sonobuoy section. Sediment thickness reaches 2 km in the studied area and increases towards the depocentre of the giant Franz-Victoria fan on the Barents–Kara continental margin. High-relief oceanic crystalline crust with 3.7 km s−1 average near-top velocity is infilled by four seismic sediment units with typical velocities 2.4, 2.2, 2.0 and 1.8 km s−1. A prominent regional seismic horizon between units 2 and 3 is tentatively correlated by basement onlap and sedimentation rates to a Miocene (∼10 Ma) palaeoceanographic event, possibly the opening of the Fram Strait. The youngest unit is correlated to prograding sequences on the margin and to the onset of major slope failure caused by intensified glacio-fluvial drainage and ice sheet erosion during Northern Hemisphere glaciations (2.6–0.01 Ma). Text Arctic Arctic Ocean Fram Strait Ice Sheet Nansen Nansen Basin Yermak plateau HighWire Press (Stanford University) Arctic Arctic Ocean Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Geophysical Journal International 176 3 805 821 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Seismology |
spellingShingle |
Seismology Engen, Øyvind Gjengedal, Jakob Andreas Faleide, Jan Inge Kristoffersen, Yngve Eldholm, Olav Seismic stratigraphy and sediment thickness of the Nansen Basin, Arctic Ocean |
topic_facet |
Seismology |
description |
A Norwegian expedition to the western Nansen Basin, Yermak Plateau and the Hinlopen margin in 2001 acquired about 1100 km of 2-D multichannel seismic profiles and 50 wide-angle sonobuoy record sections. Analysis of these data establishes a regional seismic stratigraphic framework for the western Nansen Basin integrating previously published stratigraphic schemes. P -wave velocities and sediment thickness were derived within 7–8 per cent uncertainty from 2-D seismic ray tracing models of each sonobuoy section. Sediment thickness reaches 2 km in the studied area and increases towards the depocentre of the giant Franz-Victoria fan on the Barents–Kara continental margin. High-relief oceanic crystalline crust with 3.7 km s−1 average near-top velocity is infilled by four seismic sediment units with typical velocities 2.4, 2.2, 2.0 and 1.8 km s−1. A prominent regional seismic horizon between units 2 and 3 is tentatively correlated by basement onlap and sedimentation rates to a Miocene (∼10 Ma) palaeoceanographic event, possibly the opening of the Fram Strait. The youngest unit is correlated to prograding sequences on the margin and to the onset of major slope failure caused by intensified glacio-fluvial drainage and ice sheet erosion during Northern Hemisphere glaciations (2.6–0.01 Ma). |
format |
Text |
author |
Engen, Øyvind Gjengedal, Jakob Andreas Faleide, Jan Inge Kristoffersen, Yngve Eldholm, Olav |
author_facet |
Engen, Øyvind Gjengedal, Jakob Andreas Faleide, Jan Inge Kristoffersen, Yngve Eldholm, Olav |
author_sort |
Engen, Øyvind |
title |
Seismic stratigraphy and sediment thickness of the Nansen Basin, Arctic Ocean |
title_short |
Seismic stratigraphy and sediment thickness of the Nansen Basin, Arctic Ocean |
title_full |
Seismic stratigraphy and sediment thickness of the Nansen Basin, Arctic Ocean |
title_fullStr |
Seismic stratigraphy and sediment thickness of the Nansen Basin, Arctic Ocean |
title_full_unstemmed |
Seismic stratigraphy and sediment thickness of the Nansen Basin, Arctic Ocean |
title_sort |
seismic stratigraphy and sediment thickness of the nansen basin, arctic ocean |
publisher |
Oxford University Press |
publishDate |
2009 |
url |
http://gji.oxfordjournals.org/cgi/content/short/176/3/805 https://doi.org/10.1111/j.1365-246X.2008.04028.x |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Arctic Ocean Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Yermak Plateau |
genre |
Arctic Arctic Ocean Fram Strait Ice Sheet Nansen Nansen Basin Yermak plateau |
genre_facet |
Arctic Arctic Ocean Fram Strait Ice Sheet Nansen Nansen Basin Yermak plateau |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/176/3/805 http://dx.doi.org/10.1111/j.1365-246X.2008.04028.x |
op_rights |
Copyright (C) 2009, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.2008.04028.x |
container_title |
Geophysical Journal International |
container_volume |
176 |
container_issue |
3 |
container_start_page |
805 |
op_container_end_page |
821 |
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1766339281065869312 |