A cryptic Gondwana-forming orogen located in Antarctica
The most poorly exposed and least understood Gondwana-forming orogen lies largely hidden beneath ice in East Antarctica. Called the Kuunga orogen, its interpolation between scattered outcrops is speculative with differing and often contradictory trends proposed, and no consensus on the location of a...
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ftpubmed:oai:pubmedcentral.nih.gov:5976760 2023-05-15T13:52:55+02:00 A cryptic Gondwana-forming orogen located in Antarctica Daczko, Nathan R. Halpin, Jacqueline A. Fitzsimons, Ian C. W. Whittaker, Joanne M. 2018-05-30 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5976760/ https://doi.org/10.1038/s41598-018-26530-1 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5976760/ http://dx.doi.org/10.1038/s41598-018-26530-1 © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2018 ftpubmed https://doi.org/10.1038/s41598-018-26530-1 2018-06-03T00:39:56Z The most poorly exposed and least understood Gondwana-forming orogen lies largely hidden beneath ice in East Antarctica. Called the Kuunga orogen, its interpolation between scattered outcrops is speculative with differing and often contradictory trends proposed, and no consensus on the location of any sutures. While some discount a suture altogether, paleomagnetic data from Indo-Antarctica and Australo-Antarctica do require 3000–5000 km relative displacement during Ediacaran-Cambrian Gondwana amalgamation, suggesting that the Kuunga orogen sutured provinces of broadly Indian versus Australian affinity. Here we use compiled data from detrital zircons offshore of East Antarctica that fingerprint two coastal subglacial basement provinces between 60 and 130°E, one of Indian affinity with dominant ca. 980–900 Ma ages (Indo-Antarctica) and one of Australian affinity with dominant ca. 1190–1140 and ca. 1560 Ma ages (Australo-Antarctica). We combine this offshore compilation with existing and new onshore U-Pb geochronology and previous geophysical interpretations to delimit the Indo-Australo-Antarctic boundary at a prominent geophysical lineament which intersects the coast east of Mirny at ~94°E. Text Antarc* Antarctic Antarctica East Antarctica PubMed Central (PMC) Antarctic East Antarctica Indian Mirny ENVELOPE(93.009,93.009,-66.553,-66.553) Scientific Reports 8 1 |
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Article Daczko, Nathan R. Halpin, Jacqueline A. Fitzsimons, Ian C. W. Whittaker, Joanne M. A cryptic Gondwana-forming orogen located in Antarctica |
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Article |
description |
The most poorly exposed and least understood Gondwana-forming orogen lies largely hidden beneath ice in East Antarctica. Called the Kuunga orogen, its interpolation between scattered outcrops is speculative with differing and often contradictory trends proposed, and no consensus on the location of any sutures. While some discount a suture altogether, paleomagnetic data from Indo-Antarctica and Australo-Antarctica do require 3000–5000 km relative displacement during Ediacaran-Cambrian Gondwana amalgamation, suggesting that the Kuunga orogen sutured provinces of broadly Indian versus Australian affinity. Here we use compiled data from detrital zircons offshore of East Antarctica that fingerprint two coastal subglacial basement provinces between 60 and 130°E, one of Indian affinity with dominant ca. 980–900 Ma ages (Indo-Antarctica) and one of Australian affinity with dominant ca. 1190–1140 and ca. 1560 Ma ages (Australo-Antarctica). We combine this offshore compilation with existing and new onshore U-Pb geochronology and previous geophysical interpretations to delimit the Indo-Australo-Antarctic boundary at a prominent geophysical lineament which intersects the coast east of Mirny at ~94°E. |
format |
Text |
author |
Daczko, Nathan R. Halpin, Jacqueline A. Fitzsimons, Ian C. W. Whittaker, Joanne M. |
author_facet |
Daczko, Nathan R. Halpin, Jacqueline A. Fitzsimons, Ian C. W. Whittaker, Joanne M. |
author_sort |
Daczko, Nathan R. |
title |
A cryptic Gondwana-forming orogen located in Antarctica |
title_short |
A cryptic Gondwana-forming orogen located in Antarctica |
title_full |
A cryptic Gondwana-forming orogen located in Antarctica |
title_fullStr |
A cryptic Gondwana-forming orogen located in Antarctica |
title_full_unstemmed |
A cryptic Gondwana-forming orogen located in Antarctica |
title_sort |
cryptic gondwana-forming orogen located in antarctica |
publisher |
Nature Publishing Group UK |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5976760/ https://doi.org/10.1038/s41598-018-26530-1 |
long_lat |
ENVELOPE(93.009,93.009,-66.553,-66.553) |
geographic |
Antarctic East Antarctica Indian Mirny |
geographic_facet |
Antarctic East Antarctica Indian Mirny |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5976760/ http://dx.doi.org/10.1038/s41598-018-26530-1 |
op_rights |
© The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-018-26530-1 |
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Scientific Reports |
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8 |
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1 |
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