Paleoproterozoic tectonics around 1.69 Ga in Adélie Land (East Antarctica)
International audience This paper describes the deformation that occurred in the Paleoproterozoic terrains of the Terre Adélie Craton (East Antartica) at ca. 1.69 Ga. The structural pattern is marked by sub-vertical deformation zones, trending N340360°, that rework sub-horizontal fabrics. Both type...
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00279839 https://doi.org/10.1016/j.precamres.2007.10.011 |
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ftclermontuniv:oai:HAL:insu-00279839v1 2023-05-15T14:04:28+02:00 Paleoproterozoic tectonics around 1.69 Ga in Adélie Land (East Antarctica) Gapais, Denis Pelletier, Anne Ménot, René-Pierre Peucat, Jean-Jacques Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS) Laboratoire Magmas et Volcans (LMV) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) 2008 https://hal-insu.archives-ouvertes.fr/insu-00279839 https://doi.org/10.1016/j.precamres.2007.10.011 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.precamres.2007.10.011 insu-00279839 https://hal-insu.archives-ouvertes.fr/insu-00279839 doi:10.1016/j.precamres.2007.10.011 ISSN: 0301-9268 Precambrian Research https://hal-insu.archives-ouvertes.fr/insu-00279839 Precambrian Research, 2008, 162 (3-4), pp.531-539. ⟨10.1016/j.precamres.2007.10.011⟩ Tectonics Structural analysis Paleoproterozoic Antarctica Terre Adélie [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics info:eu-repo/semantics/article Journal articles 2008 ftclermontuniv https://doi.org/10.1016/j.precamres.2007.10.011 2023-03-14T23:52:35Z International audience This paper describes the deformation that occurred in the Paleoproterozoic terrains of the Terre Adélie Craton (East Antartica) at ca. 1.69 Ga. The structural pattern is marked by sub-vertical deformation zones, trending N340360°, that rework sub-horizontal fabrics. Both types of structures developed under similar partial melting conditions (thermal and pressure peaks around 700750 °C and 500600 MPa, respectively) and are in part coeval. Vertical zones show kinematic indicators of dextral transpression. Strike-slip components appear to increase in intensity from W to E, toward the contact between Paleoproterozoic terrains and Archaean blocks located to the East. Flat-lying foliations bear stretching lineations, which strike N340360°, at low-angle to the transpressional shear zones and to the boundaries between major units. Structural and metamorphic signatures are consistent with a model in which hot and weak continental domains converge toward a stiffer craton. Horizontal shortening was accommodated along vertical transpressional zones. Thickening combined with significant magmatic input might have triggered gravity-driven horizontal crustal flow at high angle to the convergence direction. Article in Journal/Newspaper Antarc* Antarctica antartic* East Antarctica HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) East Antarctica Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) Precambrian Research 162 3-4 531 539 |
institution |
Open Polar |
collection |
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) |
op_collection_id |
ftclermontuniv |
language |
English |
topic |
Tectonics Structural analysis Paleoproterozoic Antarctica Terre Adélie [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
spellingShingle |
Tectonics Structural analysis Paleoproterozoic Antarctica Terre Adélie [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics Gapais, Denis Pelletier, Anne Ménot, René-Pierre Peucat, Jean-Jacques Paleoproterozoic tectonics around 1.69 Ga in Adélie Land (East Antarctica) |
topic_facet |
Tectonics Structural analysis Paleoproterozoic Antarctica Terre Adélie [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
description |
International audience This paper describes the deformation that occurred in the Paleoproterozoic terrains of the Terre Adélie Craton (East Antartica) at ca. 1.69 Ga. The structural pattern is marked by sub-vertical deformation zones, trending N340360°, that rework sub-horizontal fabrics. Both types of structures developed under similar partial melting conditions (thermal and pressure peaks around 700750 °C and 500600 MPa, respectively) and are in part coeval. Vertical zones show kinematic indicators of dextral transpression. Strike-slip components appear to increase in intensity from W to E, toward the contact between Paleoproterozoic terrains and Archaean blocks located to the East. Flat-lying foliations bear stretching lineations, which strike N340360°, at low-angle to the transpressional shear zones and to the boundaries between major units. Structural and metamorphic signatures are consistent with a model in which hot and weak continental domains converge toward a stiffer craton. Horizontal shortening was accommodated along vertical transpressional zones. Thickening combined with significant magmatic input might have triggered gravity-driven horizontal crustal flow at high angle to the convergence direction. |
author2 |
Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS) Laboratoire Magmas et Volcans (LMV) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Gapais, Denis Pelletier, Anne Ménot, René-Pierre Peucat, Jean-Jacques |
author_facet |
Gapais, Denis Pelletier, Anne Ménot, René-Pierre Peucat, Jean-Jacques |
author_sort |
Gapais, Denis |
title |
Paleoproterozoic tectonics around 1.69 Ga in Adélie Land (East Antarctica) |
title_short |
Paleoproterozoic tectonics around 1.69 Ga in Adélie Land (East Antarctica) |
title_full |
Paleoproterozoic tectonics around 1.69 Ga in Adélie Land (East Antarctica) |
title_fullStr |
Paleoproterozoic tectonics around 1.69 Ga in Adélie Land (East Antarctica) |
title_full_unstemmed |
Paleoproterozoic tectonics around 1.69 Ga in Adélie Land (East Antarctica) |
title_sort |
paleoproterozoic tectonics around 1.69 ga in adélie land (east antarctica) |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00279839 https://doi.org/10.1016/j.precamres.2007.10.011 |
long_lat |
ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) |
geographic |
East Antarctica Terre Adélie Terre-Adélie |
geographic_facet |
East Antarctica Terre Adélie Terre-Adélie |
genre |
Antarc* Antarctica antartic* East Antarctica |
genre_facet |
Antarc* Antarctica antartic* East Antarctica |
op_source |
ISSN: 0301-9268 Precambrian Research https://hal-insu.archives-ouvertes.fr/insu-00279839 Precambrian Research, 2008, 162 (3-4), pp.531-539. ⟨10.1016/j.precamres.2007.10.011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.precamres.2007.10.011 insu-00279839 https://hal-insu.archives-ouvertes.fr/insu-00279839 doi:10.1016/j.precamres.2007.10.011 |
op_doi |
https://doi.org/10.1016/j.precamres.2007.10.011 |
container_title |
Precambrian Research |
container_volume |
162 |
container_issue |
3-4 |
container_start_page |
531 |
op_container_end_page |
539 |
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1766275568294166528 |