Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data
The Møre Margin in the NE Atlantic represents a dominantly passive margin with an unusual abrupt transition from alpine morphology onshore to a deep sedimentary basin offshore. In order to study this transition in detail, three ocean bottom seismometer profiles with deep seismic reflection and refra...
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ftoceanrep:oai:oceanrep.geomar.de:25583 2023-05-15T16:57:03+02:00 Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data Kvarven, Trond Ebbing, Jörg Mjelde, Rolf Faleide, Jan Inge Libak, Audun Thybo, Hans Flueh, Ernst R. Murai, Yoshio 2014 text https://oceanrep.geomar.de/id/eprint/25583/ https://oceanrep.geomar.de/id/eprint/25583/1/Kvarven%20et.al.pdf https://doi.org/10.1016/j.tecto.2014.03.021 en eng Elsevier https://oceanrep.geomar.de/id/eprint/25583/1/Kvarven%20et.al.pdf Kvarven, T., Ebbing, J., Mjelde, R., Faleide, J. I., Libak, A., Thybo, H., Flueh, E. R. and Murai, Y. (2014) Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data. Tectonophysics, 626 . pp. 21-40. DOI 10.1016/j.tecto.2014.03.021 <https://doi.org/10.1016/j.tecto.2014.03.021>. doi:10.1016/j.tecto.2014.03.021 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1016/j.tecto.2014.03.021 2023-04-07T15:14:15Z The Møre Margin in the NE Atlantic represents a dominantly passive margin with an unusual abrupt transition from alpine morphology onshore to a deep sedimentary basin offshore. In order to study this transition in detail, three ocean bottom seismometer profiles with deep seismic reflection and refraction data were acquired in 2009; two dip-profiles which were extended by land stations, and one tie-profile parallel to the strike of the Møre–Trøndelag Fault Complex. The modeling of the wide-angle seismic data was performed with a combined inversion and forward modeling approach and validated with a 3D-density model. Modeling of the geophysical data indicates the presence of a 12–15 km thick accumulation of sedimentary rocks in the Møre Basin. The modeling of the strike profile located closer to land shows a decrease in crustal velocity from north to south. Near the coast we observe an intra-crustal reflector under the Trøndelag Platform, but not under the Slørebotn Sub-basin. Furthermore, two lower crustal high-velocity bodies are modeled, one located near the Møre Marginal High and one beneath the Slørebotn Sub-basin. While the outer lower crustal body is modeled with a density allowing an interpretation as magmatic underplating, the inner body has a density close to mantle density which might suggest an origin as an eclogized body, formed by metamorphosis of lower crustal gabbro during the Caledonian orogeny. The difference in velocity and extent of the lower crustal bodies seems to be controlled by the Jan Mayen Lineament, suggesting that the lineament represents a pre-Caledonian structural feature in the basement. Article in Journal/Newspaper Jan Mayen OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Jan Mayen Norway Tectonophysics 626 21 40 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The Møre Margin in the NE Atlantic represents a dominantly passive margin with an unusual abrupt transition from alpine morphology onshore to a deep sedimentary basin offshore. In order to study this transition in detail, three ocean bottom seismometer profiles with deep seismic reflection and refraction data were acquired in 2009; two dip-profiles which were extended by land stations, and one tie-profile parallel to the strike of the Møre–Trøndelag Fault Complex. The modeling of the wide-angle seismic data was performed with a combined inversion and forward modeling approach and validated with a 3D-density model. Modeling of the geophysical data indicates the presence of a 12–15 km thick accumulation of sedimentary rocks in the Møre Basin. The modeling of the strike profile located closer to land shows a decrease in crustal velocity from north to south. Near the coast we observe an intra-crustal reflector under the Trøndelag Platform, but not under the Slørebotn Sub-basin. Furthermore, two lower crustal high-velocity bodies are modeled, one located near the Møre Marginal High and one beneath the Slørebotn Sub-basin. While the outer lower crustal body is modeled with a density allowing an interpretation as magmatic underplating, the inner body has a density close to mantle density which might suggest an origin as an eclogized body, formed by metamorphosis of lower crustal gabbro during the Caledonian orogeny. The difference in velocity and extent of the lower crustal bodies seems to be controlled by the Jan Mayen Lineament, suggesting that the lineament represents a pre-Caledonian structural feature in the basement. |
format |
Article in Journal/Newspaper |
author |
Kvarven, Trond Ebbing, Jörg Mjelde, Rolf Faleide, Jan Inge Libak, Audun Thybo, Hans Flueh, Ernst R. Murai, Yoshio |
spellingShingle |
Kvarven, Trond Ebbing, Jörg Mjelde, Rolf Faleide, Jan Inge Libak, Audun Thybo, Hans Flueh, Ernst R. Murai, Yoshio Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data |
author_facet |
Kvarven, Trond Ebbing, Jörg Mjelde, Rolf Faleide, Jan Inge Libak, Audun Thybo, Hans Flueh, Ernst R. Murai, Yoshio |
author_sort |
Kvarven, Trond |
title |
Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data |
title_short |
Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data |
title_full |
Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data |
title_fullStr |
Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data |
title_full_unstemmed |
Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data |
title_sort |
crustal structure across the møre margin, mid-norway, from wide-angle seismic and gravity data |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/25583/ https://oceanrep.geomar.de/id/eprint/25583/1/Kvarven%20et.al.pdf https://doi.org/10.1016/j.tecto.2014.03.021 |
geographic |
Jan Mayen Norway |
geographic_facet |
Jan Mayen Norway |
genre |
Jan Mayen |
genre_facet |
Jan Mayen |
op_relation |
https://oceanrep.geomar.de/id/eprint/25583/1/Kvarven%20et.al.pdf Kvarven, T., Ebbing, J., Mjelde, R., Faleide, J. I., Libak, A., Thybo, H., Flueh, E. R. and Murai, Y. (2014) Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data. Tectonophysics, 626 . pp. 21-40. DOI 10.1016/j.tecto.2014.03.021 <https://doi.org/10.1016/j.tecto.2014.03.021>. doi:10.1016/j.tecto.2014.03.021 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.tecto.2014.03.021 |
container_title |
Tectonophysics |
container_volume |
626 |
container_start_page |
21 |
op_container_end_page |
40 |
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1766048314241843200 |