Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin
The Norwegian continental shelf has been through several rift phases since the Caledonian orogeny. Early Cretaceous rifting created the largest sedimentary basins, and Early Cenozoic continental breakup between East Greenland and Europe affected the continental shelf to various degrees. The Lofoten/...
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ftunivbergen:oai:bora.uib.no:11250/2755876 2023-05-15T15:38:46+02:00 Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin Breivik, Asbjørn Johan Faleide, Jan Inge Mjelde, Rolf Flueh, Ernst Murai, Yoshio 2020 application/pdf https://hdl.handle.net/11250/2755876 https://doi.org/10.1016/j.tecto.2020.228318 eng eng Elsevier European Science Foundation (ESF): CRP01 urn:issn:0040-1951 https://hdl.handle.net/11250/2755876 https://doi.org/10.1016/j.tecto.2020.228318 cristin:1837291 Tectonophysics. 2020, 776, 228318 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no Copyright 2020 Elsevier 228318 Tectonophysics 776 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.1016/j.tecto.2020.228318 2023-03-14T17:38:57Z The Norwegian continental shelf has been through several rift phases since the Caledonian orogeny. Early Cretaceous rifting created the largest sedimentary basins, and Early Cenozoic continental breakup between East Greenland and Europe affected the continental shelf to various degrees. The Lofoten/Vesterålen shelf is located off Northern Norway, bordering the epicontinental Barents Sea to the northeast, and the deep-water Lofoten Basin to the west. An ocean bottom seismometer/hydrophone (OBS) survey was conducted over the shelf and margin areas in 2003 to constrain crustal structure and margin development. This study presents Profile 8-03, located between the islands of Lofoten/Vesterålen and the shelf edge. The wide-angle seismic data were modeled using forward/inverse raytracing to build a crustal velocity-depth transect. Gravity modeling was used to resolve an ambiguity in seismic Moho identification in the southwestern part. Results show a crustal thickness of ~31 km, significantly thicker than what a vintage land station based study suggested. Profile 8-03 and other OBS profiles to the southwest show high sedimentary velocities at or near the seafloor, increasing rapidly with depth. Sedimentary velocities were compared to the velocity-depth function derived from an OBS profile at the Barents Sea margin, tied to a coincident well log, where there is little erosion. Results from this profile and the crossing Profile 6-03 (Breivik et al. 2017) indicate three major erosion episodes; Late Triassic-Early Jurassic, tentatively mid-Cretaceous, Late Cretaceous–early Cenozoic, and a minor late glacial erosion episode off Vesterålen. acceptedVersion Article in Journal/Newspaper Barents Sea East Greenland Greenland Lofoten Northern Norway Vesterålen University of Bergen: Bergen Open Research Archive (BORA-UiB) Barents Sea Breivik ENVELOPE(14.238,14.238,66.999,66.999) Greenland Lofoten Lofoten Basin ENVELOPE(4.000,4.000,70.000,70.000) Norway Vesterålen ENVELOPE(14.939,14.939,68.754,68.754) Tectonophysics 776 228318 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
The Norwegian continental shelf has been through several rift phases since the Caledonian orogeny. Early Cretaceous rifting created the largest sedimentary basins, and Early Cenozoic continental breakup between East Greenland and Europe affected the continental shelf to various degrees. The Lofoten/Vesterålen shelf is located off Northern Norway, bordering the epicontinental Barents Sea to the northeast, and the deep-water Lofoten Basin to the west. An ocean bottom seismometer/hydrophone (OBS) survey was conducted over the shelf and margin areas in 2003 to constrain crustal structure and margin development. This study presents Profile 8-03, located between the islands of Lofoten/Vesterålen and the shelf edge. The wide-angle seismic data were modeled using forward/inverse raytracing to build a crustal velocity-depth transect. Gravity modeling was used to resolve an ambiguity in seismic Moho identification in the southwestern part. Results show a crustal thickness of ~31 km, significantly thicker than what a vintage land station based study suggested. Profile 8-03 and other OBS profiles to the southwest show high sedimentary velocities at or near the seafloor, increasing rapidly with depth. Sedimentary velocities were compared to the velocity-depth function derived from an OBS profile at the Barents Sea margin, tied to a coincident well log, where there is little erosion. Results from this profile and the crossing Profile 6-03 (Breivik et al. 2017) indicate three major erosion episodes; Late Triassic-Early Jurassic, tentatively mid-Cretaceous, Late Cretaceous–early Cenozoic, and a minor late glacial erosion episode off Vesterålen. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Breivik, Asbjørn Johan Faleide, Jan Inge Mjelde, Rolf Flueh, Ernst Murai, Yoshio |
spellingShingle |
Breivik, Asbjørn Johan Faleide, Jan Inge Mjelde, Rolf Flueh, Ernst Murai, Yoshio Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin |
author_facet |
Breivik, Asbjørn Johan Faleide, Jan Inge Mjelde, Rolf Flueh, Ernst Murai, Yoshio |
author_sort |
Breivik, Asbjørn Johan |
title |
Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin |
title_short |
Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin |
title_full |
Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin |
title_fullStr |
Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin |
title_full_unstemmed |
Crustal structure and erosion of the Lofoten/Vesterålen shelf, northern Norwegian margin |
title_sort |
crustal structure and erosion of the lofoten/vesterålen shelf, northern norwegian margin |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2755876 https://doi.org/10.1016/j.tecto.2020.228318 |
long_lat |
ENVELOPE(14.238,14.238,66.999,66.999) ENVELOPE(4.000,4.000,70.000,70.000) ENVELOPE(14.939,14.939,68.754,68.754) |
geographic |
Barents Sea Breivik Greenland Lofoten Lofoten Basin Norway Vesterålen |
geographic_facet |
Barents Sea Breivik Greenland Lofoten Lofoten Basin Norway Vesterålen |
genre |
Barents Sea East Greenland Greenland Lofoten Northern Norway Vesterålen |
genre_facet |
Barents Sea East Greenland Greenland Lofoten Northern Norway Vesterålen |
op_source |
228318 Tectonophysics 776 |
op_relation |
European Science Foundation (ESF): CRP01 urn:issn:0040-1951 https://hdl.handle.net/11250/2755876 https://doi.org/10.1016/j.tecto.2020.228318 cristin:1837291 Tectonophysics. 2020, 776, 228318 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no Copyright 2020 Elsevier |
op_doi |
https://doi.org/10.1016/j.tecto.2020.228318 |
container_title |
Tectonophysics |
container_volume |
776 |
container_start_page |
228318 |
_version_ |
1766370079089360896 |