A cryptic Gondwana-forming orogen located in Antarctica
The most poorly exposed and least understood Gondwana-forming orogen lies largely hidden beneathice in East Antarctica. Called the Kuunga orogen, its interpolation between scattered outcrops isspeculative with differing and often contradictory trends proposed, and no consensus on the locationof any...
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ftunivtasmania:oai:eprints.utas.edu.au:27250 2023-05-15T13:31:53+02:00 A cryptic Gondwana-forming orogen located in Antarctica Daczko, NR Halpin, JA Fitzsimons, ICW Whittaker, JM 2018 application/pdf https://eprints.utas.edu.au/27250/ https://eprints.utas.edu.au/27250/1/Daczko%2B%2BGondwanaAntarctica_SciRep_2018.pdf en eng Nature Publishing Group https://eprints.utas.edu.au/27250/1/Daczko%2B%2BGondwanaAntarctica_SciRep_2018.pdf Daczko, NR, Halpin, JA orcid:0000-0002-4992-8681 , Fitzsimons, ICW and Whittaker, JM orcid:0000-0002-3170-3935 2018 , 'A cryptic Gondwana-forming orogen located in Antarctica' , Scientific Reports, vol. 8 , pp. 1-9 , doi:10.1038/s41598-018-26530-1 <http://dx.doi.org/10.1038/s41598-018-26530-1>. Antarctica plate reconstruction Gondwana Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1038/s41598-018-26530-1 2021-09-13T22:18:00Z The most poorly exposed and least understood Gondwana-forming orogen lies largely hidden beneathice in East Antarctica. Called the Kuunga orogen, its interpolation between scattered outcrops isspeculative with differing and often contradictory trends proposed, and no consensus on the locationof any sutures. While some discount a suture altogether, paleomagnetic data from Indo-Antarcticaand Australo-Antarctica do require 3000–5000 km relative displacement during Ediacaran-CambrianGondwana amalgamation, suggesting that the Kuunga orogen sutured provinces of broadly Indianversus Australian affinity. Here we use compiled data from detrital zircons offshore of East Antarcticathat fingerprint two coastal subglacial basement provinces between 60 and 130°E, one of Indian affinitywith 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 withexisting and new onshore U-Pb geochronology and previous geophysical interpretations to delimit theIndo-Australo-Antarctic boundary at a prominent geophysical lineament which intersects the coast eastof Mirny at ~94°E. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica University of Tasmania: UTas ePrints Antarctic East Antarctica Indian Mirny ENVELOPE(93.009,93.009,-66.553,-66.553) Scientific Reports 8 1 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctica plate reconstruction Gondwana |
spellingShingle |
Antarctica plate reconstruction Gondwana Daczko, NR Halpin, JA Fitzsimons, ICW Whittaker, JM A cryptic Gondwana-forming orogen located in Antarctica |
topic_facet |
Antarctica plate reconstruction Gondwana |
description |
The most poorly exposed and least understood Gondwana-forming orogen lies largely hidden beneathice in East Antarctica. Called the Kuunga orogen, its interpolation between scattered outcrops isspeculative with differing and often contradictory trends proposed, and no consensus on the locationof any sutures. While some discount a suture altogether, paleomagnetic data from Indo-Antarcticaand Australo-Antarctica do require 3000–5000 km relative displacement during Ediacaran-CambrianGondwana amalgamation, suggesting that the Kuunga orogen sutured provinces of broadly Indianversus Australian affinity. Here we use compiled data from detrital zircons offshore of East Antarcticathat fingerprint two coastal subglacial basement provinces between 60 and 130°E, one of Indian affinitywith 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 withexisting and new onshore U-Pb geochronology and previous geophysical interpretations to delimit theIndo-Australo-Antarctic boundary at a prominent geophysical lineament which intersects the coast eastof Mirny at ~94°E. |
format |
Article in Journal/Newspaper |
author |
Daczko, NR Halpin, JA Fitzsimons, ICW Whittaker, JM |
author_facet |
Daczko, NR Halpin, JA Fitzsimons, ICW Whittaker, JM |
author_sort |
Daczko, NR |
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 |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/27250/ https://eprints.utas.edu.au/27250/1/Daczko%2B%2BGondwanaAntarctica_SciRep_2018.pdf |
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 |
https://eprints.utas.edu.au/27250/1/Daczko%2B%2BGondwanaAntarctica_SciRep_2018.pdf Daczko, NR, Halpin, JA orcid:0000-0002-4992-8681 , Fitzsimons, ICW and Whittaker, JM orcid:0000-0002-3170-3935 2018 , 'A cryptic Gondwana-forming orogen located in Antarctica' , Scientific Reports, vol. 8 , pp. 1-9 , doi:10.1038/s41598-018-26530-1 <http://dx.doi.org/10.1038/s41598-018-26530-1>. |
op_doi |
https://doi.org/10.1038/s41598-018-26530-1 |
container_title |
Scientific Reports |
container_volume |
8 |
container_issue |
1 |
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1766021825180991488 |