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 modeling uses the joint refraction/reflection tomography approach where co-located m...
Published in: | Geophysical Journal International |
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Language: | English |
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Wiley
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Online Access: | https://oceanrep.geomar.de/id/eprint/43168/ https://oceanrep.geomar.de/id/eprint/43168/1/Shulgin.pdf https://doi.org/10.1093/gji/ggy139 |
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ftoceanrep:oai:oceanrep.geomar.de:43168 2023-05-15T15:38:42+02:00 The crustal structure in the transition zone between the western and eastern Barents Sea Shulgin, Alexey Mjelde, Rolf Faleide, Jan Inge Høy, Tore Flueh, Ernst Thybo, Hans 2018 text https://oceanrep.geomar.de/id/eprint/43168/ https://oceanrep.geomar.de/id/eprint/43168/1/Shulgin.pdf https://doi.org/10.1093/gji/ggy139 en eng Wiley https://oceanrep.geomar.de/id/eprint/43168/1/Shulgin.pdf Shulgin, A., Mjelde, R., Faleide, J. I., Høy, T., Flueh, E. and Thybo, H. (2018) The crustal structure in the transition zone between the western and eastern Barents Sea. Geophysical Journal International, 214 (1). pp. 315-330. DOI 10.1093/gji/ggy139 <https://doi.org/10.1093/gji%2Fggy139>. doi:10.1093/gji/ggy139 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.1093/gji/ggy139 2023-04-07T15:40:01Z 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 modeling uses the joint refraction/reflection tomography approach where co-located multi-channel seismic reflection data constrain the sedimentary structure. Further, forward gravity modeling 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. Article in Journal/Newspaper Barents Sea Fedynsky High Pechora Varanger OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Barents Sea Geophysical Journal International 214 1 315 330 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
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 modeling uses the joint refraction/reflection tomography approach where co-located multi-channel seismic reflection data constrain the sedimentary structure. Further, forward gravity modeling 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. |
format |
Article in Journal/Newspaper |
author |
Shulgin, Alexey Mjelde, Rolf Faleide, Jan Inge Høy, Tore Flueh, Ernst Thybo, Hans |
spellingShingle |
Shulgin, Alexey 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 Mjelde, Rolf Faleide, Jan Inge Høy, Tore Flueh, Ernst Thybo, Hans |
author_sort |
Shulgin, Alexey |
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 |
Wiley |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/43168/ https://oceanrep.geomar.de/id/eprint/43168/1/Shulgin.pdf 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_relation |
https://oceanrep.geomar.de/id/eprint/43168/1/Shulgin.pdf Shulgin, A., Mjelde, R., Faleide, J. I., Høy, T., Flueh, E. and Thybo, H. (2018) The crustal structure in the transition zone between the western and eastern Barents Sea. Geophysical Journal International, 214 (1). pp. 315-330. DOI 10.1093/gji/ggy139 <https://doi.org/10.1093/gji%2Fggy139>. doi:10.1093/gji/ggy139 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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_ |
1766369938483707904 |