Ediacaran mafic magmatism recorded in Cambrian eclogites of the Ross orogen, Antarctica: Implications for the Neoproterozoic rifting episodes along the <scp>Pacific‐Gondwana</scp> margin
Abstract We report the first finding of Ediacaran mafic magmatism in northern Victoria Land of the Ross orogen, Antarctica, based on ca. 600–590 Ma magmatic zircon cores in Cambrian eclogites. The mafic magmatism could be either linked to ca. 615–590 Ma incipient convergent margin magmatism in centr...
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crwiley:10.1111/ter.12626 2024-04-21T07:48:03+00:00 Ediacaran mafic magmatism recorded in Cambrian eclogites of the Ross orogen, Antarctica: Implications for the Neoproterozoic rifting episodes along the <scp>Pacific‐Gondwana</scp> margin Kim, Taehwan Kim, Yoonsup Cheong, Wonseok Cho, Moonsup Lee, Jong Ik Korea Polar Research Institute Ministry of Oceans and Fisheries 2022 http://dx.doi.org/10.1111/ter.12626 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ter.12626 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ter.12626 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Terra Nova volume 35, issue 1, page 32-40 ISSN 0954-4879 1365-3121 Geology journal-article 2022 crwiley https://doi.org/10.1111/ter.12626 2024-03-28T08:29:46Z Abstract We report the first finding of Ediacaran mafic magmatism in northern Victoria Land of the Ross orogen, Antarctica, based on ca. 600–590 Ma magmatic zircon cores in Cambrian eclogites. The mafic magmatism could be either linked to ca. 615–590 Ma incipient convergent margin magmatism in central segment of the Ross orogen, or ca. 600–580 Ma continental rift‐related volcanism widespread in eastern Australia. The latter is preferred based on the trace‐element compositions distinctive from those of arc‐related basalts and the depleted mantle‐like Hf isotopic compositions of zircon. Our results suggest dual rifting episodes during both the Ediacaran and Cryogenian (ca. 670–650 Ma) in the East Antarctic margin, correlative with those in eastern Australia. A spatial distribution of coeval rifting and subduction along the Ediacaran margin of East Antarctica is readily accounted for by rift inheritance; the upper‐ and lower‐plate geometry resulting from detachment and transform faulting. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Victoria Land Wiley Online Library Terra Nova 35 1 32 40 |
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Wiley Online Library |
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English |
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Geology |
spellingShingle |
Geology Kim, Taehwan Kim, Yoonsup Cheong, Wonseok Cho, Moonsup Lee, Jong Ik Ediacaran mafic magmatism recorded in Cambrian eclogites of the Ross orogen, Antarctica: Implications for the Neoproterozoic rifting episodes along the <scp>Pacific‐Gondwana</scp> margin |
topic_facet |
Geology |
description |
Abstract We report the first finding of Ediacaran mafic magmatism in northern Victoria Land of the Ross orogen, Antarctica, based on ca. 600–590 Ma magmatic zircon cores in Cambrian eclogites. The mafic magmatism could be either linked to ca. 615–590 Ma incipient convergent margin magmatism in central segment of the Ross orogen, or ca. 600–580 Ma continental rift‐related volcanism widespread in eastern Australia. The latter is preferred based on the trace‐element compositions distinctive from those of arc‐related basalts and the depleted mantle‐like Hf isotopic compositions of zircon. Our results suggest dual rifting episodes during both the Ediacaran and Cryogenian (ca. 670–650 Ma) in the East Antarctic margin, correlative with those in eastern Australia. A spatial distribution of coeval rifting and subduction along the Ediacaran margin of East Antarctica is readily accounted for by rift inheritance; the upper‐ and lower‐plate geometry resulting from detachment and transform faulting. |
author2 |
Korea Polar Research Institute Ministry of Oceans and Fisheries |
format |
Article in Journal/Newspaper |
author |
Kim, Taehwan Kim, Yoonsup Cheong, Wonseok Cho, Moonsup Lee, Jong Ik |
author_facet |
Kim, Taehwan Kim, Yoonsup Cheong, Wonseok Cho, Moonsup Lee, Jong Ik |
author_sort |
Kim, Taehwan |
title |
Ediacaran mafic magmatism recorded in Cambrian eclogites of the Ross orogen, Antarctica: Implications for the Neoproterozoic rifting episodes along the <scp>Pacific‐Gondwana</scp> margin |
title_short |
Ediacaran mafic magmatism recorded in Cambrian eclogites of the Ross orogen, Antarctica: Implications for the Neoproterozoic rifting episodes along the <scp>Pacific‐Gondwana</scp> margin |
title_full |
Ediacaran mafic magmatism recorded in Cambrian eclogites of the Ross orogen, Antarctica: Implications for the Neoproterozoic rifting episodes along the <scp>Pacific‐Gondwana</scp> margin |
title_fullStr |
Ediacaran mafic magmatism recorded in Cambrian eclogites of the Ross orogen, Antarctica: Implications for the Neoproterozoic rifting episodes along the <scp>Pacific‐Gondwana</scp> margin |
title_full_unstemmed |
Ediacaran mafic magmatism recorded in Cambrian eclogites of the Ross orogen, Antarctica: Implications for the Neoproterozoic rifting episodes along the <scp>Pacific‐Gondwana</scp> margin |
title_sort |
ediacaran mafic magmatism recorded in cambrian eclogites of the ross orogen, antarctica: implications for the neoproterozoic rifting episodes along the <scp>pacific‐gondwana</scp> margin |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/ter.12626 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ter.12626 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ter.12626 |
genre |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
op_source |
Terra Nova volume 35, issue 1, page 32-40 ISSN 0954-4879 1365-3121 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ter.12626 |
container_title |
Terra Nova |
container_volume |
35 |
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1 |
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32 |
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40 |
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1796947975139753984 |