Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection
International audience This study presents the first geochronological results on basement rocks from the Penguin-Bage-Webb (PBW) domain located east of the Neoarchean-Paleoproterozoic Terre Adélie craton, Antarctica. Investigated samples are paragneiss xenoliths hosted within early Paleozoic granito...
Published in: | Lithos |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2018
|
Subjects: | |
Online Access: | https://uca.hal.science/hal-01863781 https://doi.org/10.1016/j.lithos.2018.08.021 |
id |
ftunivcotedazur:oai:HAL:hal-01863781v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
HAL Université Côte d'Azur |
op_collection_id |
ftunivcotedazur |
language |
English |
topic |
Gondwana margin Ross orogeny George V Land Antarctica-Australia connection Zircon and monazite UPb dating [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
Gondwana margin Ross orogeny George V Land Antarctica-Australia connection Zircon and monazite UPb dating [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Lamarque, Gaëlle Bascou, Jerôme Ménot, René-Pierre Paquette, Jean-Louis Couzinié, Simon Rolland, Yann Cottin, Jean-Yves Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection |
topic_facet |
Gondwana margin Ross orogeny George V Land Antarctica-Australia connection Zircon and monazite UPb dating [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience This study presents the first geochronological results on basement rocks from the Penguin-Bage-Webb (PBW) domain located east of the Neoarchean-Paleoproterozoic Terre Adélie craton, Antarctica. Investigated samples are paragneiss xenoliths hosted within early Paleozoic granitoids, which were emplaced during the Ross orogeny. Zircon UPb dating yielded ages ranging from the Archean to the Cambrian, with a dominant Ediacaran (550–635 Ma) population and maximum depositional ages around 570–575 Ma. U–Th–Pb analyses of monazite suggest that the metamorphic event that formed the gneiss samples occured at ca. 515 Ma, shortly prior to incorporation within the granitic magmas. The studied samples likely represent relics of the pre-Gondawana Pacific margin, which was subsequently deformed and metamorphosed during the early Paleozoic Ross orogeny. The obtained zircon UPb date distributions present similarities with those of the Kanmantoo and Nargoon sediments in Southern Australia and provide new constrains for the correlations between East Antarctica and South Australia before the opening of the Southern Ocean. |
author2 |
Laboratoire Magmas et Volcans (LMV) Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Institut de Recherche pour le Développement et la société-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Physique de l'ENS Lyon (Phys-ENS) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) |
format |
Article in Journal/Newspaper |
author |
Lamarque, Gaëlle Bascou, Jerôme Ménot, René-Pierre Paquette, Jean-Louis Couzinié, Simon Rolland, Yann Cottin, Jean-Yves |
author_facet |
Lamarque, Gaëlle Bascou, Jerôme Ménot, René-Pierre Paquette, Jean-Louis Couzinié, Simon Rolland, Yann Cottin, Jean-Yves |
author_sort |
Lamarque, Gaëlle |
title |
Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection |
title_short |
Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection |
title_full |
Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection |
title_fullStr |
Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection |
title_full_unstemmed |
Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection |
title_sort |
ediacaran to lower cambrian basement in eastern george v land (antarctica): evidence from u pb dating of gneiss xenoliths and implications for the south australia- east antarctica connection |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://uca.hal.science/hal-01863781 https://doi.org/10.1016/j.lithos.2018.08.021 |
long_lat |
ENVELOPE(146.583,146.583,-67.733,-67.733) ENVELOPE(148.000,148.000,-68.500,-68.500) ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) ENVELOPE(146.867,146.867,-67.867,-67.867) |
geographic |
Bage East Antarctica George V Land Pacific Southern Ocean Terre Adélie Terre-Adélie Webb |
geographic_facet |
Bage East Antarctica George V Land Pacific Southern Ocean Terre Adélie Terre-Adélie Webb |
genre |
Antarc* Antarctica East Antarctica George V Land Southern Ocean |
genre_facet |
Antarc* Antarctica East Antarctica George V Land Southern Ocean |
op_source |
ISSN: 0024-4937 Lithos https://uca.hal.science/hal-01863781 Lithos, 2018, 318-319, pp.219 - 229. ⟨10.1016/j.lithos.2018.08.021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.lithos.2018.08.021 hal-01863781 https://uca.hal.science/hal-01863781 doi:10.1016/j.lithos.2018.08.021 |
op_doi |
https://doi.org/10.1016/j.lithos.2018.08.021 |
container_title |
Lithos |
container_volume |
318-319 |
container_start_page |
219 |
op_container_end_page |
229 |
_version_ |
1802642275591782400 |
spelling |
ftunivcotedazur:oai:HAL:hal-01863781v1 2024-06-23T07:45:46+00:00 Ediacaran to lower Cambrian basement in eastern George V Land (Antarctica): Evidence from U Pb dating of gneiss xenoliths and implications for the South Australia- East Antarctica connection Lamarque, Gaëlle Bascou, Jerôme Ménot, René-Pierre Paquette, Jean-Louis Couzinié, Simon Rolland, Yann Cottin, Jean-Yves Laboratoire Magmas et Volcans (LMV) Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Institut de Recherche pour le Développement et la société-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Physique de l'ENS Lyon (Phys-ENS) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) 2018-10 https://uca.hal.science/hal-01863781 https://doi.org/10.1016/j.lithos.2018.08.021 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.lithos.2018.08.021 hal-01863781 https://uca.hal.science/hal-01863781 doi:10.1016/j.lithos.2018.08.021 ISSN: 0024-4937 Lithos https://uca.hal.science/hal-01863781 Lithos, 2018, 318-319, pp.219 - 229. ⟨10.1016/j.lithos.2018.08.021⟩ Gondwana margin Ross orogeny George V Land Antarctica-Australia connection Zircon and monazite UPb dating [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2018 ftunivcotedazur https://doi.org/10.1016/j.lithos.2018.08.021 2024-05-27T14:29:30Z International audience This study presents the first geochronological results on basement rocks from the Penguin-Bage-Webb (PBW) domain located east of the Neoarchean-Paleoproterozoic Terre Adélie craton, Antarctica. Investigated samples are paragneiss xenoliths hosted within early Paleozoic granitoids, which were emplaced during the Ross orogeny. Zircon UPb dating yielded ages ranging from the Archean to the Cambrian, with a dominant Ediacaran (550–635 Ma) population and maximum depositional ages around 570–575 Ma. U–Th–Pb analyses of monazite suggest that the metamorphic event that formed the gneiss samples occured at ca. 515 Ma, shortly prior to incorporation within the granitic magmas. The studied samples likely represent relics of the pre-Gondawana Pacific margin, which was subsequently deformed and metamorphosed during the early Paleozoic Ross orogeny. The obtained zircon UPb date distributions present similarities with those of the Kanmantoo and Nargoon sediments in Southern Australia and provide new constrains for the correlations between East Antarctica and South Australia before the opening of the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctica East Antarctica George V Land Southern Ocean HAL Université Côte d'Azur Bage ENVELOPE(146.583,146.583,-67.733,-67.733) East Antarctica George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) Pacific Southern Ocean Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) Webb ENVELOPE(146.867,146.867,-67.867,-67.867) Lithos 318-319 219 229 |