Differential spreading along the NE Atlantic ridge system and post-breakup deformation of the adjacent continental margins
M&émoire de Géosciences-Rennes n°141, 315 p., ISBN : 2-914375-82-4 One of the main assumptions of the theory of plate tectonics is that all lithospheric plates are rigid. However, reconstructions of the opening of the NE Atlantic Ocean, on the basis of two rigid plates (Eurasia and Greenland), l...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://theses.hal.science/tel-00714418 https://theses.hal.science/tel-00714418/document https://theses.hal.science/tel-00714418/file/THESE_LeBreton.pdf |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Atlantique Nord-Est accrétion océanique microcontinent de Jan Mayen zones de fracture réactivation compression marge européenne Great Glen Fault : panache mantellique islandais NE Atlantic seafloor spreading Jan Mayen microcontinent fracture zones european margin Great Glen fault Iceland plume [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Atlantique Nord-Est accrétion océanique microcontinent de Jan Mayen zones de fracture réactivation compression marge européenne Great Glen Fault : panache mantellique islandais NE Atlantic seafloor spreading Jan Mayen microcontinent fracture zones european margin Great Glen fault Iceland plume [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes Le Breton, Eline Differential spreading along the NE Atlantic ridge system and post-breakup deformation of the adjacent continental margins |
topic_facet |
Atlantique Nord-Est accrétion océanique microcontinent de Jan Mayen zones de fracture réactivation compression marge européenne Great Glen Fault : panache mantellique islandais NE Atlantic seafloor spreading Jan Mayen microcontinent fracture zones european margin Great Glen fault Iceland plume [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes |
description |
M&émoire de Géosciences-Rennes n°141, 315 p., ISBN : 2-914375-82-4 One of the main assumptions of the theory of plate tectonics is that all lithospheric plates are rigid. However, reconstructions of the opening of the NE Atlantic Ocean, on the basis of two rigid plates (Eurasia and Greenland), lead to gaps and overlaps between the plates. The area between Iceland and the Jan Mayen Fracture Zone (JMFZ) had a complex spreading history, including progressive separation of the Jan Mayen Microcontinent (JMMC) and a ridge jump from the Aegir Ridge to the Kolbeinsey Ridge. Moreover, post-breakup compressional structures developed along the continental margin of NW Europe, but apparently not on the East Greenland Margin. We therefore investigate how compressional deformation of the NW European Margin may have resulted from variations in the direction and rate of sea-floor spreading along the various ridges. In order to reconstruct the complex spreading history of the NE Atlantic and to study the evolution of the European Margin during sea-floor spreading, we have developed a method for palinspastic reconstructions of the opening of an ocean, using magnetic anomalies and fracture zones. The best kinematic reconstructions result from subdividing the NE Atlantic into three oceanic segments: Reykjanes, Jan Mayen and Mohns. The method allows all oceanic segments to spread at a different rate and results in accurate determinations of spreading rates and relative displacements between the segments. The model ensures a good fit of the magnetic anomalies and predicts differences in direction and rate of spreading between the Reykjanes, Kolbeinsey/Aegir and Mohns ridges. This differential sea-floor spreading generated leftlateral slip between the oceanic segments: (1) from Early Eocene to Late Oligocene, along the Faeroe Fracture Zone (FFZ); and (2) from Late Eocene to Early Oligocene, as well as during the Miocene, along the JMFZ. Such left-lateral motion and the relative rotation between the oceanic segments are ... |
author2 |
Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Université Rennes 1 Peter R. Cobbold et Olivier Dauteuil(olivier.dauteuil@univ-rennes1.fr) |
format |
Doctoral or Postdoctoral Thesis |
author |
Le Breton, Eline |
author_facet |
Le Breton, Eline |
author_sort |
Le Breton, Eline |
title |
Differential spreading along the NE Atlantic ridge system and post-breakup deformation of the adjacent continental margins |
title_short |
Differential spreading along the NE Atlantic ridge system and post-breakup deformation of the adjacent continental margins |
title_full |
Differential spreading along the NE Atlantic ridge system and post-breakup deformation of the adjacent continental margins |
title_fullStr |
Differential spreading along the NE Atlantic ridge system and post-breakup deformation of the adjacent continental margins |
title_full_unstemmed |
Differential spreading along the NE Atlantic ridge system and post-breakup deformation of the adjacent continental margins |
title_sort |
differential spreading along the ne atlantic ridge system and post-breakup deformation of the adjacent continental margins |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://theses.hal.science/tel-00714418 https://theses.hal.science/tel-00714418/document https://theses.hal.science/tel-00714418/file/THESE_LeBreton.pdf |
long_lat |
ENVELOPE(-4.125,-4.125,66.167,66.167) ENVELOPE(-8.000,-8.000,71.200,71.200) ENVELOPE(-18.687,-18.687,67.149,67.149) ENVELOPE(-16.917,-16.917,68.833,68.833) ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Aegir Ridge Greenland Jan Mayen Jan Mayen Fracture Zone Kolbeinsey Kolbeinsey Ridge Reykjanes |
geographic_facet |
Aegir Ridge Greenland Jan Mayen Jan Mayen Fracture Zone Kolbeinsey Kolbeinsey Ridge Reykjanes |
genre |
East Greenland Greenland Iceland Jan Mayen Kolbeinsey |
genre_facet |
East Greenland Greenland Iceland Jan Mayen Kolbeinsey |
op_source |
https://theses.hal.science/tel-00714418 Tectonics. Université Rennes 1, 2012. English. ⟨NNT : ⟩ |
op_relation |
tel-00714418 https://theses.hal.science/tel-00714418 https://theses.hal.science/tel-00714418/document https://theses.hal.science/tel-00714418/file/THESE_LeBreton.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1790599701112815616 |
spelling |
ftinsu:oai:HAL:tel-00714418v1 2024-02-11T10:03:28+01:00 Differential spreading along the NE Atlantic ridge system and post-breakup deformation of the adjacent continental margins L'ouverture différentielle de l'océan Atlantique Nord-Est et ses effets sur les déformations postbreak-up des marges continentales Le Breton, Eline Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Université Rennes 1 Peter R. Cobbold et Olivier Dauteuil(olivier.dauteuil@univ-rennes1.fr) 2012-03-26 https://theses.hal.science/tel-00714418 https://theses.hal.science/tel-00714418/document https://theses.hal.science/tel-00714418/file/THESE_LeBreton.pdf en eng HAL CCSD tel-00714418 https://theses.hal.science/tel-00714418 https://theses.hal.science/tel-00714418/document https://theses.hal.science/tel-00714418/file/THESE_LeBreton.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00714418 Tectonics. Université Rennes 1, 2012. English. ⟨NNT : ⟩ Atlantique Nord-Est accrétion océanique microcontinent de Jan Mayen zones de fracture réactivation compression marge européenne Great Glen Fault : panache mantellique islandais NE Atlantic seafloor spreading Jan Mayen microcontinent fracture zones european margin Great Glen fault Iceland plume [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/doctoralThesis Theses 2012 ftinsu 2024-01-24T17:23:31Z M&émoire de Géosciences-Rennes n°141, 315 p., ISBN : 2-914375-82-4 One of the main assumptions of the theory of plate tectonics is that all lithospheric plates are rigid. However, reconstructions of the opening of the NE Atlantic Ocean, on the basis of two rigid plates (Eurasia and Greenland), lead to gaps and overlaps between the plates. The area between Iceland and the Jan Mayen Fracture Zone (JMFZ) had a complex spreading history, including progressive separation of the Jan Mayen Microcontinent (JMMC) and a ridge jump from the Aegir Ridge to the Kolbeinsey Ridge. Moreover, post-breakup compressional structures developed along the continental margin of NW Europe, but apparently not on the East Greenland Margin. We therefore investigate how compressional deformation of the NW European Margin may have resulted from variations in the direction and rate of sea-floor spreading along the various ridges. In order to reconstruct the complex spreading history of the NE Atlantic and to study the evolution of the European Margin during sea-floor spreading, we have developed a method for palinspastic reconstructions of the opening of an ocean, using magnetic anomalies and fracture zones. The best kinematic reconstructions result from subdividing the NE Atlantic into three oceanic segments: Reykjanes, Jan Mayen and Mohns. The method allows all oceanic segments to spread at a different rate and results in accurate determinations of spreading rates and relative displacements between the segments. The model ensures a good fit of the magnetic anomalies and predicts differences in direction and rate of spreading between the Reykjanes, Kolbeinsey/Aegir and Mohns ridges. This differential sea-floor spreading generated leftlateral slip between the oceanic segments: (1) from Early Eocene to Late Oligocene, along the Faeroe Fracture Zone (FFZ); and (2) from Late Eocene to Early Oligocene, as well as during the Miocene, along the JMFZ. Such left-lateral motion and the relative rotation between the oceanic segments are ... Doctoral or Postdoctoral Thesis East Greenland Greenland Iceland Jan Mayen Kolbeinsey Institut national des sciences de l'Univers: HAL-INSU Aegir Ridge ENVELOPE(-4.125,-4.125,66.167,66.167) Greenland Jan Mayen Jan Mayen Fracture Zone ENVELOPE(-8.000,-8.000,71.200,71.200) Kolbeinsey ENVELOPE(-18.687,-18.687,67.149,67.149) Kolbeinsey Ridge ENVELOPE(-16.917,-16.917,68.833,68.833) Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) |