Transition from symmetry to asymmetry during continental rifting: An example from the Bight Basin-Terre Adélie (Australian and Antarctic conjugate margins)
International audience The rifting history of the magma-poor conjugate margins of Australia and Antarctica is still a controversial issue. In this article, we present a model for lithosphere-scale rifting and deformation history from initial Jurassic rifting to Late Cretaceous breakup for the conjug...
Published in: | Terra Nova |
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Main Authors: | , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.archives-ouvertes.fr/hal-00872289 https://doi.org/10.1111/j.1365-3121.2011.01055.x |
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ftunivnantes:oai:HAL:hal-00872289v1 |
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openpolar |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
continental lithosphere Cretaceous deformation detachment fault exhumation Jurassic passive margin plate tectonics rifting Adelie Coast Antarctica Australia Bight Basin East Antarctica Indian Ocean [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
continental lithosphere Cretaceous deformation detachment fault exhumation Jurassic passive margin plate tectonics rifting Adelie Coast Antarctica Australia Bight Basin East Antarctica Indian Ocean [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Espurt, N. Callot, Jean-Paul Roure, F. Totterdell, J.M. Struckmeyer, H.I.M. Vially, R. Transition from symmetry to asymmetry during continental rifting: An example from the Bight Basin-Terre Adélie (Australian and Antarctic conjugate margins) |
topic_facet |
continental lithosphere Cretaceous deformation detachment fault exhumation Jurassic passive margin plate tectonics rifting Adelie Coast Antarctica Australia Bight Basin East Antarctica Indian Ocean [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The rifting history of the magma-poor conjugate margins of Australia and Antarctica is still a controversial issue. In this article, we present a model for lithosphere-scale rifting and deformation history from initial Jurassic rifting to Late Cretaceous breakup for the conjugate Bight Basin-Terre Adélie section of the margin, based on the interpretation of two regional conjugate seismic profiles of the margins, and the construction of a lithosphere-scale, balanced cross-section, sequentially restored through time. The model scenario highlights the symmetric pattern of initial stretching resulting from pure shear at lithospheric-scale accompanied by the development of four conjugate detachments and crustal half-graben systems. This system progressively evolves to completely asymmetric shearing along a single south-dipping detachment at the scale of the lithosphere. Antarctica plays the role of the upper plate and Australia, the lower plate. The detachment accounts for the exhumation of the mantle part of the Australian lithosphere, and the isolation of a crustal klippe separated from the margin by a serpentinized peridotite ridge. The total elongation amount of the Australian-Antarctic conjugate system reaches ~473km (178%). Elongation was partitioned through time: ~189 and ~284km during symmetric and asymmetric stages respectively. During the symmetric stage, both margins underwent approximately the same degree of crustal stretching [~105km (75%) and ~84km (67%) for Australia and Antarctica respectively]. Again, both margins accommodated relatively the same elongation during the asymmetric stage: the Antarctic upper plate records an elongation amount of ~284km (88%) as crustal/mantle stretching, above the inferred low-angle south-dipping detachment zone, whereas the Australian lower plate underwent ~270km (206%) of elongation through mantle exhumation. Although the restoration process does not allow reconstruction of the precise geometry before deformation, we propose that the Jurassic ... |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR) TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) IFP Energies nouvelles (IFPEN) |
format |
Article in Journal/Newspaper |
author |
Espurt, N. Callot, Jean-Paul Roure, F. Totterdell, J.M. Struckmeyer, H.I.M. Vially, R. |
author_facet |
Espurt, N. Callot, Jean-Paul Roure, F. Totterdell, J.M. Struckmeyer, H.I.M. Vially, R. |
author_sort |
Espurt, N. |
title |
Transition from symmetry to asymmetry during continental rifting: An example from the Bight Basin-Terre Adélie (Australian and Antarctic conjugate margins) |
title_short |
Transition from symmetry to asymmetry during continental rifting: An example from the Bight Basin-Terre Adélie (Australian and Antarctic conjugate margins) |
title_full |
Transition from symmetry to asymmetry during continental rifting: An example from the Bight Basin-Terre Adélie (Australian and Antarctic conjugate margins) |
title_fullStr |
Transition from symmetry to asymmetry during continental rifting: An example from the Bight Basin-Terre Adélie (Australian and Antarctic conjugate margins) |
title_full_unstemmed |
Transition from symmetry to asymmetry during continental rifting: An example from the Bight Basin-Terre Adélie (Australian and Antarctic conjugate margins) |
title_sort |
transition from symmetry to asymmetry during continental rifting: an example from the bight basin-terre adélie (australian and antarctic conjugate margins) |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-00872289 https://doi.org/10.1111/j.1365-3121.2011.01055.x |
long_lat |
ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) |
geographic |
Antarctic East Antarctica Indian Terre Adélie Terre-Adélie The Antarctic |
geographic_facet |
Antarctic East Antarctica Indian Terre Adélie Terre-Adélie The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
ISSN: 0954-4879 EISSN: 1365-3121 Terra Nova https://hal.archives-ouvertes.fr/hal-00872289 Terra Nova, Wiley-Blackwell, 2012, 24 (3), pp.167-180. ⟨10.1111/j.1365-3121.2011.01055.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-3121.2011.01055.x hal-00872289 https://hal.archives-ouvertes.fr/hal-00872289 doi:10.1111/j.1365-3121.2011.01055.x |
op_doi |
https://doi.org/10.1111/j.1365-3121.2011.01055.x |
container_title |
Terra Nova |
container_volume |
24 |
container_issue |
3 |
container_start_page |
167 |
op_container_end_page |
180 |
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1766213723950678016 |
spelling |
ftunivnantes:oai:HAL:hal-00872289v1 2023-05-15T13:45:08+02:00 Transition from symmetry to asymmetry during continental rifting: An example from the Bight Basin-Terre Adélie (Australian and Antarctic conjugate margins) Espurt, N. Callot, Jean-Paul Roure, F. Totterdell, J.M. Struckmeyer, H.I.M. Vially, R. Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR) TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) IFP Energies nouvelles (IFPEN) 2012 https://hal.archives-ouvertes.fr/hal-00872289 https://doi.org/10.1111/j.1365-3121.2011.01055.x en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-3121.2011.01055.x hal-00872289 https://hal.archives-ouvertes.fr/hal-00872289 doi:10.1111/j.1365-3121.2011.01055.x ISSN: 0954-4879 EISSN: 1365-3121 Terra Nova https://hal.archives-ouvertes.fr/hal-00872289 Terra Nova, Wiley-Blackwell, 2012, 24 (3), pp.167-180. ⟨10.1111/j.1365-3121.2011.01055.x⟩ continental lithosphere Cretaceous deformation detachment fault exhumation Jurassic passive margin plate tectonics rifting Adelie Coast Antarctica Australia Bight Basin East Antarctica Indian Ocean [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2012 ftunivnantes https://doi.org/10.1111/j.1365-3121.2011.01055.x 2022-11-08T23:43:07Z International audience The rifting history of the magma-poor conjugate margins of Australia and Antarctica is still a controversial issue. In this article, we present a model for lithosphere-scale rifting and deformation history from initial Jurassic rifting to Late Cretaceous breakup for the conjugate Bight Basin-Terre Adélie section of the margin, based on the interpretation of two regional conjugate seismic profiles of the margins, and the construction of a lithosphere-scale, balanced cross-section, sequentially restored through time. The model scenario highlights the symmetric pattern of initial stretching resulting from pure shear at lithospheric-scale accompanied by the development of four conjugate detachments and crustal half-graben systems. This system progressively evolves to completely asymmetric shearing along a single south-dipping detachment at the scale of the lithosphere. Antarctica plays the role of the upper plate and Australia, the lower plate. The detachment accounts for the exhumation of the mantle part of the Australian lithosphere, and the isolation of a crustal klippe separated from the margin by a serpentinized peridotite ridge. The total elongation amount of the Australian-Antarctic conjugate system reaches ~473km (178%). Elongation was partitioned through time: ~189 and ~284km during symmetric and asymmetric stages respectively. During the symmetric stage, both margins underwent approximately the same degree of crustal stretching [~105km (75%) and ~84km (67%) for Australia and Antarctica respectively]. Again, both margins accommodated relatively the same elongation during the asymmetric stage: the Antarctic upper plate records an elongation amount of ~284km (88%) as crustal/mantle stretching, above the inferred low-angle south-dipping detachment zone, whereas the Australian lower plate underwent ~270km (206%) of elongation through mantle exhumation. Although the restoration process does not allow reconstruction of the precise geometry before deformation, we propose that the Jurassic ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Université de Nantes: HAL-UNIV-NANTES Antarctic East Antarctica Indian Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) The Antarctic Terra Nova 24 3 167 180 |