The crustal structure in the transition zone between the western and eastern Barents Sea
We present a crustal-scale seismic profile in the Barents Sea based on new data. Wide-angle seismic data were recorded along a 600 km long profile at 38 ocean bottom seismometer and 52 onshore station locations. The modelling uses the joint refraction/reflection tomography approach where co-located...
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Oxford University Press
2019
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Online Access: | https://hdl.handle.net/1956/20244 https://doi.org/10.1093/gji/ggy139 |
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ftunivbergen:oai:bora.uib.no:1956/20244 2023-05-15T15:38:44+02:00 The crustal structure in the transition zone between the western and eastern Barents Sea Shulgin, Alexey A Mjelde, Rolf Faleide, Jan Inge Høy, Tore Flueh, Ernst Thybo, Hans 2019-02-04T12:25:18Z application/pdf https://hdl.handle.net/1956/20244 https://doi.org/10.1093/gji/ggy139 eng eng Oxford University Press urn:issn:0956-540X urn:issn:1365-246X https://hdl.handle.net/1956/20244 https://doi.org/10.1093/gji/ggy139 cristin:1593121 Copyright The Author(s) 2018. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved Geophysical Journal International Crustal structure Continental shelf Refraction seismology Seismic modelling Peer reviewed Journal article 2019 ftunivbergen https://doi.org/10.1093/gji/ggy139 2023-03-14T17:41:34Z We present a crustal-scale seismic profile in the Barents Sea based on new data. Wide-angle seismic data were recorded along a 600 km long profile at 38 ocean bottom seismometer and 52 onshore station locations. The modelling uses the joint refraction/reflection tomography approach where co-located multichannel seismic reflection data constrain the sedimentary structure. Further, forward gravity modelling is based on the seismic model. We also calculate net regional erosion based on the calculated shallow velocity structure. Our model reveals a complex crustal structure of the Baltic Shield to Barents shelf transition zone, as well as strong structural variability on the shelf itself. We document large volumes of pre-Carboniferous sedimentary strata in the transition zone which reach a total thickness of 10 km. A high-velocity crustal domain found below the Varanger Peninsula likely represents an independent crustal block. Large lower crustal bodies with very high velocity and density below the Varanger Peninsula and the Fedynsky High are interpreted as underplated material that may have fed mafic dykes in the Devonian. We speculate that these lower crustal bodies are linked to the Devonian rifting processes in the East European Craton, or belonging to the integral part of the Timanides, as observed onshore in the Pechora Basin. publishedVersion Article in Journal/Newspaper Barents Sea Fedynsky High Pechora Varanger University of Bergen: Bergen Open Research Archive (BORA-UiB) Barents Sea Geophysical Journal International 214 1 315 330 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Crustal structure Continental shelf Refraction seismology Seismic modelling |
spellingShingle |
Crustal structure Continental shelf Refraction seismology Seismic modelling Shulgin, Alexey A Mjelde, Rolf Faleide, Jan Inge Høy, Tore Flueh, Ernst Thybo, Hans The crustal structure in the transition zone between the western and eastern Barents Sea |
topic_facet |
Crustal structure Continental shelf Refraction seismology Seismic modelling |
description |
We present a crustal-scale seismic profile in the Barents Sea based on new data. Wide-angle seismic data were recorded along a 600 km long profile at 38 ocean bottom seismometer and 52 onshore station locations. The modelling uses the joint refraction/reflection tomography approach where co-located multichannel seismic reflection data constrain the sedimentary structure. Further, forward gravity modelling is based on the seismic model. We also calculate net regional erosion based on the calculated shallow velocity structure. Our model reveals a complex crustal structure of the Baltic Shield to Barents shelf transition zone, as well as strong structural variability on the shelf itself. We document large volumes of pre-Carboniferous sedimentary strata in the transition zone which reach a total thickness of 10 km. A high-velocity crustal domain found below the Varanger Peninsula likely represents an independent crustal block. Large lower crustal bodies with very high velocity and density below the Varanger Peninsula and the Fedynsky High are interpreted as underplated material that may have fed mafic dykes in the Devonian. We speculate that these lower crustal bodies are linked to the Devonian rifting processes in the East European Craton, or belonging to the integral part of the Timanides, as observed onshore in the Pechora Basin. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Shulgin, Alexey A Mjelde, Rolf Faleide, Jan Inge Høy, Tore Flueh, Ernst Thybo, Hans |
author_facet |
Shulgin, Alexey A Mjelde, Rolf Faleide, Jan Inge Høy, Tore Flueh, Ernst Thybo, Hans |
author_sort |
Shulgin, Alexey A |
title |
The crustal structure in the transition zone between the western and eastern Barents Sea |
title_short |
The crustal structure in the transition zone between the western and eastern Barents Sea |
title_full |
The crustal structure in the transition zone between the western and eastern Barents Sea |
title_fullStr |
The crustal structure in the transition zone between the western and eastern Barents Sea |
title_full_unstemmed |
The crustal structure in the transition zone between the western and eastern Barents Sea |
title_sort |
crustal structure in the transition zone between the western and eastern barents sea |
publisher |
Oxford University Press |
publishDate |
2019 |
url |
https://hdl.handle.net/1956/20244 https://doi.org/10.1093/gji/ggy139 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Fedynsky High Pechora Varanger |
genre_facet |
Barents Sea Fedynsky High Pechora Varanger |
op_source |
Geophysical Journal International |
op_relation |
urn:issn:0956-540X urn:issn:1365-246X https://hdl.handle.net/1956/20244 https://doi.org/10.1093/gji/ggy139 cristin:1593121 |
op_rights |
Copyright The Author(s) 2018. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved |
op_doi |
https://doi.org/10.1093/gji/ggy139 |
container_title |
Geophysical Journal International |
container_volume |
214 |
container_issue |
1 |
container_start_page |
315 |
op_container_end_page |
330 |
_version_ |
1766369998776827904 |