The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny
The evolution of the Olga Basin region in the northern Norwegian Barents Sea and its relation to the Caledonian and Timanian orogenies is poorly understood due to sparse geophysical data and the lack of well control. In 2015, the German Federal Institute for Geosciences and Natural Resources (BGR) a...
Published in: | Geochemistry, Geophysics, Geosystems |
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American Geophysical Union (AGU)
2019
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Online Access: | https://hdl.handle.net/10037/16794 https://doi.org/10.1029/2018GC007814 |
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ftunivtroemsoe:oai:munin.uit.no:10037/16794 2023-05-15T15:38:24+02:00 The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny Klitzke, Peter Franke, Dieter Ehrhardt, Axel Lutz, Rüdiger Reinhardt, Lutz Heyde, Ingo Faleide, Jan Inge 2019-01-15 https://hdl.handle.net/10037/16794 https://doi.org/10.1029/2018GC007814 eng eng American Geophysical Union (AGU) Geochemistry Geophysics Geosystems Klitzke P, Franke D, Ehrhardt, Lutz, Reinhardt L, Heyde, Faleide JI. The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny. Geochemistry Geophysics Geosystems. 2019:1-16 FRIDAID 1691222 doi:10.1029/2018GC007814 1525-2027 https://hdl.handle.net/10037/16794 openAccess VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2019 ftunivtroemsoe https://doi.org/10.1029/2018GC007814 2021-06-25T17:56:57Z The evolution of the Olga Basin region in the northern Norwegian Barents Sea and its relation to the Caledonian and Timanian orogenies is poorly understood due to sparse geophysical data and the lack of well control. In 2015, the German Federal Institute for Geosciences and Natural Resources (BGR) acquired deep multichannel seismic lines as well as gravity and magnetic data. The new seismic data reveal that the Olga and Sørkapp Basins evolved as a W‐E striking half‐graben system along a major normal fault in the north and a smaller normal fault in the south, respectively. Deep crustal undulating high‐amplitude reflections below the Olga and Sørkapp Basins coincide with W‐E striking local magnetic maxima and may imply that the basins evolved on top of old collisional fabrics. The absence of major compressional deformation implies a post‐Caledonian onset of subsidence. The W‐E structural configuration of the sedimentary basins is difficult to reconcile with an earlier proposed NE striking Caledonian branch in the northern Barents Sea. Instead, the orientation of the Olga and Sørkapp Basins lines up with Timanian structural trends from the Pechora Basin. We propose that the Olga and Sørkapp Basins experienced transtensional deformation during the late Devonian/early Carboniferous NE‐SW regional extension phase whereby inherited Timanian lineaments controlled the final W‐E basin configuration. A salient pre‐Caledonian Olga‐Sørkapp crustal block in the central Barents Sea would also explain the recently proposed NNW rotation of Caledonian nappes and thrust sheets in the southwestern Barents Sea. Article in Journal/Newspaper Barents Sea Pechora University of Tromsø: Munin Open Research Archive Barents Sea Olga Basin ENVELOPE(29.000,29.000,78.333,78.333) Geochemistry, Geophysics, Geosystems 20 2 614 629 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Klitzke, Peter Franke, Dieter Ehrhardt, Axel Lutz, Rüdiger Reinhardt, Lutz Heyde, Ingo Faleide, Jan Inge The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
The evolution of the Olga Basin region in the northern Norwegian Barents Sea and its relation to the Caledonian and Timanian orogenies is poorly understood due to sparse geophysical data and the lack of well control. In 2015, the German Federal Institute for Geosciences and Natural Resources (BGR) acquired deep multichannel seismic lines as well as gravity and magnetic data. The new seismic data reveal that the Olga and Sørkapp Basins evolved as a W‐E striking half‐graben system along a major normal fault in the north and a smaller normal fault in the south, respectively. Deep crustal undulating high‐amplitude reflections below the Olga and Sørkapp Basins coincide with W‐E striking local magnetic maxima and may imply that the basins evolved on top of old collisional fabrics. The absence of major compressional deformation implies a post‐Caledonian onset of subsidence. The W‐E structural configuration of the sedimentary basins is difficult to reconcile with an earlier proposed NE striking Caledonian branch in the northern Barents Sea. Instead, the orientation of the Olga and Sørkapp Basins lines up with Timanian structural trends from the Pechora Basin. We propose that the Olga and Sørkapp Basins experienced transtensional deformation during the late Devonian/early Carboniferous NE‐SW regional extension phase whereby inherited Timanian lineaments controlled the final W‐E basin configuration. A salient pre‐Caledonian Olga‐Sørkapp crustal block in the central Barents Sea would also explain the recently proposed NNW rotation of Caledonian nappes and thrust sheets in the southwestern Barents Sea. |
format |
Article in Journal/Newspaper |
author |
Klitzke, Peter Franke, Dieter Ehrhardt, Axel Lutz, Rüdiger Reinhardt, Lutz Heyde, Ingo Faleide, Jan Inge |
author_facet |
Klitzke, Peter Franke, Dieter Ehrhardt, Axel Lutz, Rüdiger Reinhardt, Lutz Heyde, Ingo Faleide, Jan Inge |
author_sort |
Klitzke, Peter |
title |
The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny |
title_short |
The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny |
title_full |
The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny |
title_fullStr |
The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny |
title_full_unstemmed |
The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny |
title_sort |
paleozoic evolution of the olga basin region, northern barents sea: a link to the timanian orogeny |
publisher |
American Geophysical Union (AGU) |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/16794 https://doi.org/10.1029/2018GC007814 |
long_lat |
ENVELOPE(29.000,29.000,78.333,78.333) |
geographic |
Barents Sea Olga Basin |
geographic_facet |
Barents Sea Olga Basin |
genre |
Barents Sea Pechora |
genre_facet |
Barents Sea Pechora |
op_relation |
Geochemistry Geophysics Geosystems Klitzke P, Franke D, Ehrhardt, Lutz, Reinhardt L, Heyde, Faleide JI. The paleozoic evolution of the Olga Basin region, Northern Barents Sea: A link to the Timanian orogeny. Geochemistry Geophysics Geosystems. 2019:1-16 FRIDAID 1691222 doi:10.1029/2018GC007814 1525-2027 https://hdl.handle.net/10037/16794 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1029/2018GC007814 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
20 |
container_issue |
2 |
container_start_page |
614 |
op_container_end_page |
629 |
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1766369302091399168 |