Testing long‐term patterns of basin sedimentation by detrital zircon geochronology, Centralian Superbasin, Australia
ABSTRACT Detrital zircon geochronology of Neoproterozoic to Devonian sedimentary rocks from the Georgina and Amadeus basins has been used to track changes in provenance that reflect the development and inversion of the former Australian Superbasin. Through much of the Neoproterozoic, sediments appea...
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crwiley:10.1111/j.1365-2117.2007.00326.x 2024-06-09T07:40:51+00:00 Testing long‐term patterns of basin sedimentation by detrital zircon geochronology, Centralian Superbasin, Australia Maidment, D. W. Williams, I. S. Hand, M. 2007 http://dx.doi.org/10.1111/j.1365-2117.2007.00326.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2117.2007.00326.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2117.2007.00326.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Basin Research volume 19, issue 3, page 335-360 ISSN 0950-091X 1365-2117 journal-article 2007 crwiley https://doi.org/10.1111/j.1365-2117.2007.00326.x 2024-05-16T14:28:11Z ABSTRACT Detrital zircon geochronology of Neoproterozoic to Devonian sedimentary rocks from the Georgina and Amadeus basins has been used to track changes in provenance that reflect the development and inversion of the former Australian Superbasin. Through much of the Neoproterozoic, sediments appear to have been predominantly derived from local sources in the Arunta and Musgrave inliers. Close similarities between the detrital age signatures of late Neoproterozoic sedimentary rocks in the two basins suggests that they were contiguous at this time. A dominant population of 1.2–1.0 Ga zircon in Early Cambrian sediments of the Amadeus Basin reflects the uplift of the Musgrave Inlier during the Petermann Orogeny between 560 and 520 Ma, which shed a large volume of detritus northwards into the Amadeus Basin. Early Cambrian sedimentary rocks in the Georgina Basin have a much smaller proportion of 1.2–1.0 Ga detritus, possibly due to the formation of sub‐basins along the northern margin of the Amadeus Basin which might have acted as a barrier to sediment transfer. An influx of 0.6–0.5 Ga zircon towards the end of the Cambrian coincides with the transgression of the Larapintine Sea across central Australia, possibly as a result of intracratonic rifting. Detrital zircon age spectra of sedimentary rocks deposited within this epicontinental sea are very similar to those of coeval sedimentary rocks from the Pacific Gondwana margin, implying that sediment was transported into central Australia from the eastern continental margin. The remarkably consistent ‘Pacific Gondwana’ signature of Cambro‐Ordovician sediments in central and eastern Australia reflects a distal source, possibly from east Antarctica or the East African Orogen. The peak of the marine incursion into central Australia in the early to mid Ordovician coincides with granulite‐facies metamorphism at mid‐crustal depths between the Amadeus and Georgina basins (the Larapinta Event). The presence of the epicontinental sea, the relative lack of a local basement ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica Wiley Online Library East Antarctica Pacific Basin Research 19 3 335 360 |
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Wiley Online Library |
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English |
description |
ABSTRACT Detrital zircon geochronology of Neoproterozoic to Devonian sedimentary rocks from the Georgina and Amadeus basins has been used to track changes in provenance that reflect the development and inversion of the former Australian Superbasin. Through much of the Neoproterozoic, sediments appear to have been predominantly derived from local sources in the Arunta and Musgrave inliers. Close similarities between the detrital age signatures of late Neoproterozoic sedimentary rocks in the two basins suggests that they were contiguous at this time. A dominant population of 1.2–1.0 Ga zircon in Early Cambrian sediments of the Amadeus Basin reflects the uplift of the Musgrave Inlier during the Petermann Orogeny between 560 and 520 Ma, which shed a large volume of detritus northwards into the Amadeus Basin. Early Cambrian sedimentary rocks in the Georgina Basin have a much smaller proportion of 1.2–1.0 Ga detritus, possibly due to the formation of sub‐basins along the northern margin of the Amadeus Basin which might have acted as a barrier to sediment transfer. An influx of 0.6–0.5 Ga zircon towards the end of the Cambrian coincides with the transgression of the Larapintine Sea across central Australia, possibly as a result of intracratonic rifting. Detrital zircon age spectra of sedimentary rocks deposited within this epicontinental sea are very similar to those of coeval sedimentary rocks from the Pacific Gondwana margin, implying that sediment was transported into central Australia from the eastern continental margin. The remarkably consistent ‘Pacific Gondwana’ signature of Cambro‐Ordovician sediments in central and eastern Australia reflects a distal source, possibly from east Antarctica or the East African Orogen. The peak of the marine incursion into central Australia in the early to mid Ordovician coincides with granulite‐facies metamorphism at mid‐crustal depths between the Amadeus and Georgina basins (the Larapinta Event). The presence of the epicontinental sea, the relative lack of a local basement ... |
format |
Article in Journal/Newspaper |
author |
Maidment, D. W. Williams, I. S. Hand, M. |
spellingShingle |
Maidment, D. W. Williams, I. S. Hand, M. Testing long‐term patterns of basin sedimentation by detrital zircon geochronology, Centralian Superbasin, Australia |
author_facet |
Maidment, D. W. Williams, I. S. Hand, M. |
author_sort |
Maidment, D. W. |
title |
Testing long‐term patterns of basin sedimentation by detrital zircon geochronology, Centralian Superbasin, Australia |
title_short |
Testing long‐term patterns of basin sedimentation by detrital zircon geochronology, Centralian Superbasin, Australia |
title_full |
Testing long‐term patterns of basin sedimentation by detrital zircon geochronology, Centralian Superbasin, Australia |
title_fullStr |
Testing long‐term patterns of basin sedimentation by detrital zircon geochronology, Centralian Superbasin, Australia |
title_full_unstemmed |
Testing long‐term patterns of basin sedimentation by detrital zircon geochronology, Centralian Superbasin, Australia |
title_sort |
testing long‐term patterns of basin sedimentation by detrital zircon geochronology, centralian superbasin, australia |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1365-2117.2007.00326.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2117.2007.00326.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2117.2007.00326.x |
geographic |
East Antarctica Pacific |
geographic_facet |
East Antarctica Pacific |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
Basin Research volume 19, issue 3, page 335-360 ISSN 0950-091X 1365-2117 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2117.2007.00326.x |
container_title |
Basin Research |
container_volume |
19 |
container_issue |
3 |
container_start_page |
335 |
op_container_end_page |
360 |
_version_ |
1801369254654640128 |