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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Blackwell Publishing
2018
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Online Access: | http://hdl.handle.net/10852/72151 http://urn.nb.no/URN:NBN:no-75270 https://doi.org/10.1093/gji/ggy139 |
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ftoslouniv:oai:www.duo.uio.no:10852/72151 2023-05-15T15:38:45+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 2018-06-22T10:20:00Z http://hdl.handle.net/10852/72151 http://urn.nb.no/URN:NBN:no-75270 https://doi.org/10.1093/gji/ggy139 EN eng Blackwell Publishing http://urn.nb.no/URN:NBN:no-75270 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. Geophysical Journal International. 2018, 214(1), 315-330 http://hdl.handle.net/10852/72151 1593121 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geophysical Journal International&rft.volume=214&rft.spage=315&rft.date=2018 Geophysical Journal International 214 1 315 330 https://doi.org/10.1093/gji/ggy139 URN:NBN:no-75270 Fulltext https://www.duo.uio.no/bitstream/handle/10852/72151/2/Shulgin_et_al.GJI.2018-small.pdf 0956-540X Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2018 ftoslouniv https://doi.org/10.1093/gji/ggy139 2020-06-21T08:53:04Z 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. This article has been accepted for publication in Geophys. J. Int. ©:2018. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Article in Journal/Newspaper Barents Sea Fedynsky High Pechora Varanger Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Barents Sea Geophysical Journal International 214 1 315 330 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
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. This article has been accepted for publication in Geophys. J. Int. ©:2018. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Shulgin, Alexey A Mjelde, Rolf Faleide, Jan Inge Høy, Tore Flueh, Ernst Thybo, Hans |
spellingShingle |
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 |
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 |
Blackwell Publishing |
publishDate |
2018 |
url |
http://hdl.handle.net/10852/72151 http://urn.nb.no/URN:NBN:no-75270 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 |
0956-540X |
op_relation |
http://urn.nb.no/URN:NBN:no-75270 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. Geophysical Journal International. 2018, 214(1), 315-330 http://hdl.handle.net/10852/72151 1593121 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geophysical Journal International&rft.volume=214&rft.spage=315&rft.date=2018 Geophysical Journal International 214 1 315 330 https://doi.org/10.1093/gji/ggy139 URN:NBN:no-75270 Fulltext https://www.duo.uio.no/bitstream/handle/10852/72151/2/Shulgin_et_al.GJI.2018-small.pdf |
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_ |
1766370032610181120 |