Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up 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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ftsouthampton:oai:eprints.soton.ac.uk:39311 2023-07-30T04:04:33+02:00 Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes Berndt, C. Planke, S. Alvestad, E. Tsikalas, F. Rasmussen, T. 2001-05-01 text https://eprints.soton.ac.uk/39311/ https://eprints.soton.ac.uk/39311/1/413.pdf en eng https://eprints.soton.ac.uk/39311/1/413.pdf Berndt, C., Planke, S., Alvestad, E., Tsikalas, F. and Rasmussen, T. (2001) Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes. Journal of the Geological Society, 158 (3), 413-426. Article PeerReviewed 2001 ftsouthampton 2023-07-09T20:47:51Z 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 University of Southampton: e-Prints Soton 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) |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
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, C. Planke, S. Alvestad, E. Tsikalas, F. Rasmussen, T. |
spellingShingle |
Berndt, C. Planke, S. Alvestad, E. Tsikalas, F. Rasmussen, T. Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes |
author_facet |
Berndt, C. Planke, S. Alvestad, E. Tsikalas, F. Rasmussen, T. |
author_sort |
Berndt, C. |
title |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes |
title_short |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes |
title_full |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes |
title_fullStr |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes |
title_full_unstemmed |
Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes |
title_sort |
seismic volcanostratigraphy of the norwegian margin: constraints on tectono-magmatic break-up processes |
publishDate |
2001 |
url |
https://eprints.soton.ac.uk/39311/ https://eprints.soton.ac.uk/39311/1/413.pdf |
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://eprints.soton.ac.uk/39311/1/413.pdf Berndt, C., Planke, S., Alvestad, E., Tsikalas, F. and Rasmussen, T. (2001) Seismic volcanostratigraphy of the Norwegian Margin: constraints on tectono-magmatic break-up processes. Journal of the Geological Society, 158 (3), 413-426. |
_version_ |
1772816078528839680 |