Seismic investigations along the western sector of Alpha Ridge, Central Arctic Ocean
During the summer of 1998 a two-ship experiment with the Russian nuclear icebreaker Arktika and RV Polarstern probed the central part of Alpha Ridge in the High Arctic. In total 320 km of multichannel seismic data were acquired along three profiles supplemented by four sonobuoys. The sonobuoys provi...
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fthighwire:oai:open-archive.highwire.org:gji:152/1/185 2023-05-15T13:20:22+02:00 Seismic investigations along the western sector of Alpha Ridge, Central Arctic Ocean Jokat, Wilfried 2003-01-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/152/1/185 https://doi.org/10.1046/j.1365-246X.2003.01839.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/152/1/185 http://dx.doi.org/10.1046/j.1365-246X.2003.01839.x Copyright (C) 2003, Oxford University Press Research Papers TEXT 2003 fthighwire https://doi.org/10.1046/j.1365-246X.2003.01839.x 2013-05-26T22:52:16Z During the summer of 1998 a two-ship experiment with the Russian nuclear icebreaker Arktika and RV Polarstern probed the central part of Alpha Ridge in the High Arctic. In total 320 km of multichannel seismic data were acquired along three profiles supplemented by four sonobuoys. The sonobuoys provided velocity control for the sedimentary sequences and for the upper crust. The sediment velocities range from 1.6 to 2.7 km s−1 and the sediment thicknesses vary between 500 and 1200 m. The units lie conformably on the basement. Only minor faulting is visible in the area of Lyons Seamount. In general, the sediments can be divided into two units. Their age is quite hypothetical: the upper unit is most probably to be of Cenozoic and the lower of Cretaceous age. The interpretation of the seismic velocities suggests oceanic basement. The basement velocities range from 4.3 to 6.7 km s−1. In combination with a recovered basalt sample there is little doubt of the oceanic origin of Alpha Ridge, at least in its western sector. Text alpha ridge Arctic Arctic Ocean arktika Icebreaker HighWire Press (Stanford University) Arctic Arctic Ocean Alpha Ridge ENVELOPE(-120.000,-120.000,85.500,85.500) Geophysical Journal International 152 1 185 201 |
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Open Polar |
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HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Research Papers |
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Research Papers Jokat, Wilfried Seismic investigations along the western sector of Alpha Ridge, Central Arctic Ocean |
topic_facet |
Research Papers |
description |
During the summer of 1998 a two-ship experiment with the Russian nuclear icebreaker Arktika and RV Polarstern probed the central part of Alpha Ridge in the High Arctic. In total 320 km of multichannel seismic data were acquired along three profiles supplemented by four sonobuoys. The sonobuoys provided velocity control for the sedimentary sequences and for the upper crust. The sediment velocities range from 1.6 to 2.7 km s−1 and the sediment thicknesses vary between 500 and 1200 m. The units lie conformably on the basement. Only minor faulting is visible in the area of Lyons Seamount. In general, the sediments can be divided into two units. Their age is quite hypothetical: the upper unit is most probably to be of Cenozoic and the lower of Cretaceous age. The interpretation of the seismic velocities suggests oceanic basement. The basement velocities range from 4.3 to 6.7 km s−1. In combination with a recovered basalt sample there is little doubt of the oceanic origin of Alpha Ridge, at least in its western sector. |
format |
Text |
author |
Jokat, Wilfried |
author_facet |
Jokat, Wilfried |
author_sort |
Jokat, Wilfried |
title |
Seismic investigations along the western sector of Alpha Ridge, Central Arctic Ocean |
title_short |
Seismic investigations along the western sector of Alpha Ridge, Central Arctic Ocean |
title_full |
Seismic investigations along the western sector of Alpha Ridge, Central Arctic Ocean |
title_fullStr |
Seismic investigations along the western sector of Alpha Ridge, Central Arctic Ocean |
title_full_unstemmed |
Seismic investigations along the western sector of Alpha Ridge, Central Arctic Ocean |
title_sort |
seismic investigations along the western sector of alpha ridge, central arctic ocean |
publisher |
Oxford University Press |
publishDate |
2003 |
url |
http://gji.oxfordjournals.org/cgi/content/short/152/1/185 https://doi.org/10.1046/j.1365-246X.2003.01839.x |
long_lat |
ENVELOPE(-120.000,-120.000,85.500,85.500) |
geographic |
Arctic Arctic Ocean Alpha Ridge |
geographic_facet |
Arctic Arctic Ocean Alpha Ridge |
genre |
alpha ridge Arctic Arctic Ocean arktika Icebreaker |
genre_facet |
alpha ridge Arctic Arctic Ocean arktika Icebreaker |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/152/1/185 http://dx.doi.org/10.1046/j.1365-246X.2003.01839.x |
op_rights |
Copyright (C) 2003, Oxford University Press |
op_doi |
https://doi.org/10.1046/j.1365-246X.2003.01839.x |
container_title |
Geophysical Journal International |
container_volume |
152 |
container_issue |
1 |
container_start_page |
185 |
op_container_end_page |
201 |
_version_ |
1766353042407424000 |