Lower crustal bodies in the Møre volcanic rifted margin: Geophysical determination and geological implications
International audience Understanding nature, structure and age of Lower Crustal Bodies (LCBs) and their relation to the crustal structure of the Møre margin (Mid-Norwegian margin), and in a more general way, of magma-rich rifted margins, is a key issue to decipher the tectono-magmatic processes foun...
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Online Access: | https://hal.archives-ouvertes.fr/hal-01116058 https://doi.org/10.1016/j.tecto.2014.08.004 |
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ftccsdartic:oai:HAL:hal-01116058v1 2023-05-15T16:57:03+02:00 Lower crustal bodies in the Møre volcanic rifted margin: Geophysical determination and geological implications Nirrengarten, M. Gernigon, L. Manatschal, G. Dynamique de la lithosphère et des bassins sédimentaires (IPGS) (IPGS-Dylbas) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) Geological Survey of Norway (NGU) 2014-12 https://hal.archives-ouvertes.fr/hal-01116058 https://doi.org/10.1016/j.tecto.2014.08.004 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2014.08.004 hal-01116058 https://hal.archives-ouvertes.fr/hal-01116058 doi:10.1016/j.tecto.2014.08.004 ISSN: 0040-1951 EISSN: 1879-3266 Tectonophysics https://hal.archives-ouvertes.fr/hal-01116058 Tectonophysics, Elsevier, 2014, 636, pp.143-157. ⟨10.1016/j.tecto.2014.08.004⟩ [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2014 ftccsdartic https://doi.org/10.1016/j.tecto.2014.08.004 2021-10-24T12:26:38Z International audience Understanding nature, structure and age of Lower Crustal Bodies (LCBs) and their relation to the crustal structure of the Møre margin (Mid-Norwegian margin), and in a more general way, of magma-rich rifted margins, is a key issue to decipher the tectono-magmatic processes found in volcanic rifted margins. In light of 2D potential field modelling combined with reflection and refraction seismic data, we reinvestigated the crustal nature of the Møre margin and adjacent Jan Mayen corridor. In the proximal domain, our study shows that the LCBs most likely rep-resent inherited crustal bodies and not necessarily rift-related serpentinised mantle as previously proposed. To fit all geophysical observations, both lower and middle crustal layers need to be preserved over a large part of the Møre Basin. For the distal margin, the interpretation of the LCBs is more difficult. Our preferred interpretation is that they are mainly made of boudins of hyper-extended, pre-rift lower continental crustal rocks more or less intruded by Early Tertiary magmatic material. Our seismic, magnetic and gravity data does not easily support large scale exhumation of serpentinised mantle in the inner and is unlikely in the outer parts of the Møre Basin. The deep structures of the Mid-Norwegian magma rich rifted margin result from the poly-phase stretching and thinning of complex inherited crustal structures, locally intruded by Early Tertiary magmatic material. Article in Journal/Newspaper Jan Mayen Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Jan Mayen Tectonophysics 636 143 157 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Nirrengarten, M. Gernigon, L. Manatschal, G. Lower crustal bodies in the Møre volcanic rifted margin: Geophysical determination and geological implications |
topic_facet |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience Understanding nature, structure and age of Lower Crustal Bodies (LCBs) and their relation to the crustal structure of the Møre margin (Mid-Norwegian margin), and in a more general way, of magma-rich rifted margins, is a key issue to decipher the tectono-magmatic processes found in volcanic rifted margins. In light of 2D potential field modelling combined with reflection and refraction seismic data, we reinvestigated the crustal nature of the Møre margin and adjacent Jan Mayen corridor. In the proximal domain, our study shows that the LCBs most likely rep-resent inherited crustal bodies and not necessarily rift-related serpentinised mantle as previously proposed. To fit all geophysical observations, both lower and middle crustal layers need to be preserved over a large part of the Møre Basin. For the distal margin, the interpretation of the LCBs is more difficult. Our preferred interpretation is that they are mainly made of boudins of hyper-extended, pre-rift lower continental crustal rocks more or less intruded by Early Tertiary magmatic material. Our seismic, magnetic and gravity data does not easily support large scale exhumation of serpentinised mantle in the inner and is unlikely in the outer parts of the Møre Basin. The deep structures of the Mid-Norwegian magma rich rifted margin result from the poly-phase stretching and thinning of complex inherited crustal structures, locally intruded by Early Tertiary magmatic material. |
author2 |
Dynamique de la lithosphère et des bassins sédimentaires (IPGS) (IPGS-Dylbas) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) Geological Survey of Norway (NGU) |
format |
Article in Journal/Newspaper |
author |
Nirrengarten, M. Gernigon, L. Manatschal, G. |
author_facet |
Nirrengarten, M. Gernigon, L. Manatschal, G. |
author_sort |
Nirrengarten, M. |
title |
Lower crustal bodies in the Møre volcanic rifted margin: Geophysical determination and geological implications |
title_short |
Lower crustal bodies in the Møre volcanic rifted margin: Geophysical determination and geological implications |
title_full |
Lower crustal bodies in the Møre volcanic rifted margin: Geophysical determination and geological implications |
title_fullStr |
Lower crustal bodies in the Møre volcanic rifted margin: Geophysical determination and geological implications |
title_full_unstemmed |
Lower crustal bodies in the Møre volcanic rifted margin: Geophysical determination and geological implications |
title_sort |
lower crustal bodies in the møre volcanic rifted margin: geophysical determination and geological implications |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.archives-ouvertes.fr/hal-01116058 https://doi.org/10.1016/j.tecto.2014.08.004 |
geographic |
Jan Mayen |
geographic_facet |
Jan Mayen |
genre |
Jan Mayen |
genre_facet |
Jan Mayen |
op_source |
ISSN: 0040-1951 EISSN: 1879-3266 Tectonophysics https://hal.archives-ouvertes.fr/hal-01116058 Tectonophysics, Elsevier, 2014, 636, pp.143-157. ⟨10.1016/j.tecto.2014.08.004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2014.08.004 hal-01116058 https://hal.archives-ouvertes.fr/hal-01116058 doi:10.1016/j.tecto.2014.08.004 |
op_doi |
https://doi.org/10.1016/j.tecto.2014.08.004 |
container_title |
Tectonophysics |
container_volume |
636 |
container_start_page |
143 |
op_container_end_page |
157 |
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1766048314948583424 |