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
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 emplace...
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Language: | English |
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Elsevier Science Bv
2018
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Online Access: | https://archimer.ifremer.fr/doc/00457/56903/58865.pdf https://doi.org/10.1016/j.lithos.2018.08.021 https://archimer.ifremer.fr/doc/00457/56903/ |
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ftarchimer:oai:archimer.ifremer.fr:56903 2023-05-15T13:50:50+02:00 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, Gaelle Bascou, Jerome Menot, Rene-pierre Paquette, Jean-louis Couzinie, Simon Rolland, Yann Cottin, Jean-yves 2018-10 application/pdf https://archimer.ifremer.fr/doc/00457/56903/58865.pdf https://doi.org/10.1016/j.lithos.2018.08.021 https://archimer.ifremer.fr/doc/00457/56903/ eng eng Elsevier Science Bv https://archimer.ifremer.fr/doc/00457/56903/58865.pdf doi:10.1016/j.lithos.2018.08.021 https://archimer.ifremer.fr/doc/00457/56903/ 2018 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use Lithos (0024-4937) (Elsevier Science Bv), 2018-10 , Vol. 318-319 , P. 219-229 Gondwana margin Ross orogeny George V Land Antarctica-Australia connection Zircon and monazite U-Pb dating text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.1016/j.lithos.2018.08.021 2021-09-23T20:31:34Z 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 Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) 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 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Gondwana margin Ross orogeny George V Land Antarctica-Australia connection Zircon and monazite U-Pb dating |
spellingShingle |
Gondwana margin Ross orogeny George V Land Antarctica-Australia connection Zircon and monazite U-Pb dating Lamarque, Gaelle Bascou, Jerome Menot, Rene-pierre Paquette, Jean-louis Couzinie, 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 U-Pb dating |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Lamarque, Gaelle Bascou, Jerome Menot, Rene-pierre Paquette, Jean-louis Couzinie, Simon Rolland, Yann Cottin, Jean-yves |
author_facet |
Lamarque, Gaelle Bascou, Jerome Menot, Rene-pierre Paquette, Jean-louis Couzinie, Simon Rolland, Yann Cottin, Jean-yves |
author_sort |
Lamarque, Gaelle |
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 |
Elsevier Science Bv |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00457/56903/58865.pdf https://doi.org/10.1016/j.lithos.2018.08.021 https://archimer.ifremer.fr/doc/00457/56903/ |
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 |
Lithos (0024-4937) (Elsevier Science Bv), 2018-10 , Vol. 318-319 , P. 219-229 |
op_relation |
https://archimer.ifremer.fr/doc/00457/56903/58865.pdf doi:10.1016/j.lithos.2018.08.021 https://archimer.ifremer.fr/doc/00457/56903/ |
op_rights |
2018 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use |
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_ |
1766254166759440384 |