Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes
Voluminous volcanism characterized Early Tertiary continental break-up on the mid-Norwegian continental margin. The distribution of the associated extrusive rocks derived from seismic volcanostratigraphy and potential field data interpretation allows us to divide the Møre, Vøring and Lofoten–Vesterå...
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Geological Society of London
2001
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Online Access: | https://oceanrep.geomar.de/id/eprint/19125/ https://oceanrep.geomar.de/id/eprint/19125/1/berndt-01_scan.pdf https://doi.org/10.1144/jgs.158.3.413 |
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ftoceanrep:oai:oceanrep.geomar.de:19125 2023-05-15T16:57:02+02:00 Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes Berndt, Christian Planke, S. Alvestad, E. Tsikalas, F. Rasmussen, T. 2001 text https://oceanrep.geomar.de/id/eprint/19125/ https://oceanrep.geomar.de/id/eprint/19125/1/berndt-01_scan.pdf https://doi.org/10.1144/jgs.158.3.413 en eng Geological Society of London https://oceanrep.geomar.de/id/eprint/19125/1/berndt-01_scan.pdf Berndt, C. , Planke, S., Alvestad, E., Tsikalas, F. and Rasmussen, T. (2001) Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes. Journal of the Geological Society, 158 . pp. 413-426. DOI 10.1144/jgs.158.3.413 <https://doi.org/10.1144/jgs.158.3.413>. doi:10.1144/jgs.158.3.413 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2001 ftoceanrep https://doi.org/10.1144/jgs.158.3.413 2023-04-07T15:05:59Z Voluminous volcanism characterized Early Tertiary continental break-up on the mid-Norwegian continental margin. The distribution of the associated extrusive rocks derived from seismic volcanostratigraphy and potential field data interpretation allows us to divide the Møre, Vøring and Lofoten–Vesterålen margins into five segments. The central Møre Margin and the northern Vøring Margin show combinations of volcanic seismic facies units that are characteristic for typical rifted volcanic margins. The Lofoten–Vesterålen Margin, the southern Vøring Margin and the area near the Jan Mayen Fracture Zone show volcanic seismic facies units that are related to small-volume, submarine volcanism. The distribution of subaerial and submarine deposits indicates variations of subsidence along the margin. Vertical movements on the mid-Norwegian margin were primarily controlled by the amount of magmatic crustal thickening, because both the amount of dynamic uplift by the Icelandic mantle plume and the amount of subsidence due to crustal stretching were fairly constant along the margin. Thus, subaerial deposits indicate a large amount of magmatic crustal thickening and an associated reduction in isostatic subsidence, whereas submarine deposits indicate little magmatic thickening and earlier subsidence. From the distribution of volcanic seismic facies units we infer two main reasons for the different amounts of crustal thickening: (1) a general northward decrease of magmatism due to increasing distance from the hot spot and (2) subdued volcanism near the Jan Mayen Fracture Zone as a result of lateral lithospheric heat transport and cooling of the magmatic source region. Furthermore, we interpret small lateral variations in the distribution of volcanic seismic facies units, such as two sets of Inner Seaward Dipping Reflectors on the central Vøring Margin, as indications of crustal fragmentation. Article in Journal/Newspaper Jan Mayen Lofoten Vesterålen OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Lofoten Jan Mayen Vesterålen ENVELOPE(14.939,14.939,68.754,68.754) Jan Mayen Fracture Zone ENVELOPE(-8.000,-8.000,71.200,71.200) Journal of the Geological Society 158 3 413 426 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Voluminous volcanism characterized Early Tertiary continental break-up on the mid-Norwegian continental margin. The distribution of the associated extrusive rocks derived from seismic volcanostratigraphy and potential field data interpretation allows us to divide the Møre, Vøring and Lofoten–Vesterålen margins into five segments. The central Møre Margin and the northern Vøring Margin show combinations of volcanic seismic facies units that are characteristic for typical rifted volcanic margins. The Lofoten–Vesterålen Margin, the southern Vøring Margin and the area near the Jan Mayen Fracture Zone show volcanic seismic facies units that are related to small-volume, submarine volcanism. The distribution of subaerial and submarine deposits indicates variations of subsidence along the margin. Vertical movements on the mid-Norwegian margin were primarily controlled by the amount of magmatic crustal thickening, because both the amount of dynamic uplift by the Icelandic mantle plume and the amount of subsidence due to crustal stretching were fairly constant along the margin. Thus, subaerial deposits indicate a large amount of magmatic crustal thickening and an associated reduction in isostatic subsidence, whereas submarine deposits indicate little magmatic thickening and earlier subsidence. From the distribution of volcanic seismic facies units we infer two main reasons for the different amounts of crustal thickening: (1) a general northward decrease of magmatism due to increasing distance from the hot spot and (2) subdued volcanism near the Jan Mayen Fracture Zone as a result of lateral lithospheric heat transport and cooling of the magmatic source region. Furthermore, we interpret small lateral variations in the distribution of volcanic seismic facies units, such as two sets of Inner Seaward Dipping Reflectors on the central Vøring Margin, as indications of crustal fragmentation. |
format |
Article in Journal/Newspaper |
author |
Berndt, Christian Planke, S. Alvestad, E. Tsikalas, F. Rasmussen, T. |
spellingShingle |
Berndt, Christian Planke, S. Alvestad, E. Tsikalas, F. Rasmussen, T. Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes |
author_facet |
Berndt, Christian Planke, S. Alvestad, E. Tsikalas, F. Rasmussen, T. |
author_sort |
Berndt, Christian |
title |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes |
title_short |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes |
title_full |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes |
title_fullStr |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes |
title_full_unstemmed |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes |
title_sort |
seismic volcanostratigraphy of the norwegian margin: constraints on tectono-magmatic breakup processes |
publisher |
Geological Society of London |
publishDate |
2001 |
url |
https://oceanrep.geomar.de/id/eprint/19125/ https://oceanrep.geomar.de/id/eprint/19125/1/berndt-01_scan.pdf https://doi.org/10.1144/jgs.158.3.413 |
long_lat |
ENVELOPE(14.939,14.939,68.754,68.754) ENVELOPE(-8.000,-8.000,71.200,71.200) |
geographic |
Lofoten Jan Mayen Vesterålen Jan Mayen Fracture Zone |
geographic_facet |
Lofoten Jan Mayen Vesterålen Jan Mayen Fracture Zone |
genre |
Jan Mayen Lofoten Vesterålen |
genre_facet |
Jan Mayen Lofoten Vesterålen |
op_relation |
https://oceanrep.geomar.de/id/eprint/19125/1/berndt-01_scan.pdf Berndt, C. , Planke, S., Alvestad, E., Tsikalas, F. and Rasmussen, T. (2001) Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic breakup processes. Journal of the Geological Society, 158 . pp. 413-426. DOI 10.1144/jgs.158.3.413 <https://doi.org/10.1144/jgs.158.3.413>. doi:10.1144/jgs.158.3.413 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1144/jgs.158.3.413 |
container_title |
Journal of the Geological Society |
container_volume |
158 |
container_issue |
3 |
container_start_page |
413 |
op_container_end_page |
426 |
_version_ |
1766048289610792960 |