Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma)
Previous reconstructions of Antarctica and Australia were made by fitting the bathymetric outlines of the conjugate margins and aligning pre-existing structures; the precise position of the continent-ocean boundary (COB) and the amount and azimuth of pre-breakup extension were unknown. Seismic and m...
Published in: | Australian Journal of Earth Sciences |
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Language: | English |
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1988
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Online Access: | https://researchers.mq.edu.au/en/publications/7f497427-403c-4028-9b39-36a1e9904138 https://doi.org/10.1080/08120098808729453 http://www.scopus.com/inward/record.url?scp=0024196527&partnerID=8YFLogxK |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/7f497427-403c-4028-9b39-36a1e9904138 2024-09-15T17:48:07+00:00 Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) Veevers, J. J. Eittreim, S. L. 1988 https://researchers.mq.edu.au/en/publications/7f497427-403c-4028-9b39-36a1e9904138 https://doi.org/10.1080/08120098808729453 http://www.scopus.com/inward/record.url?scp=0024196527&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Veevers , J J & Eittreim , S L 1988 , ' Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) ' , Australian Journal of Earth Sciences , vol. 35 , no. 3 , pp. 355-362 . https://doi.org/10.1080/08120098808729453 Antarctica Australia Continental extension Continental reconstruction Seafloor spreading article 1988 ftmacquarieunicr https://doi.org/10.1080/08120098808729453 2024-07-24T23:38:44Z Previous reconstructions of Antarctica and Australia were made by fitting the bathymetric outlines of the conjugate margins and aligning pre-existing structures; the precise position of the continent-ocean boundary (COB) and the amount and azimuth of pre-breakup extension were unknown. Seismic and magnetic data collected off Wilkes Land by the S.P. Lee provide: (1) the basis for a unique fit of the COBs by confirming the fit of the oldest magnetic anomalies; and (2) together with information about the deep crustal structure of the Australian margin, an estimate of the azimuth and amount of pre-breakup continental extension. By these means, Antarctica and Australia are reconstructed at the mid-Cretaceous breakup and onset of drift (95 ± 5 Ma) by fitting the conjugate COBs, as determined from seismic and magnetic profiles; and before the mid-Jurassic (160 Ma) onset of rifting by removing the 360 km of continental extension estimated from the crustal structure of the 700 km wide junction zone. Article in Journal/Newspaper Antarc* Antarctica Wilkes Land Macquarie University Research Portal Australian Journal of Earth Sciences 35 3 355 362 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
Antarctica Australia Continental extension Continental reconstruction Seafloor spreading |
spellingShingle |
Antarctica Australia Continental extension Continental reconstruction Seafloor spreading Veevers, J. J. Eittreim, S. L. Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) |
topic_facet |
Antarctica Australia Continental extension Continental reconstruction Seafloor spreading |
description |
Previous reconstructions of Antarctica and Australia were made by fitting the bathymetric outlines of the conjugate margins and aligning pre-existing structures; the precise position of the continent-ocean boundary (COB) and the amount and azimuth of pre-breakup extension were unknown. Seismic and magnetic data collected off Wilkes Land by the S.P. Lee provide: (1) the basis for a unique fit of the COBs by confirming the fit of the oldest magnetic anomalies; and (2) together with information about the deep crustal structure of the Australian margin, an estimate of the azimuth and amount of pre-breakup continental extension. By these means, Antarctica and Australia are reconstructed at the mid-Cretaceous breakup and onset of drift (95 ± 5 Ma) by fitting the conjugate COBs, as determined from seismic and magnetic profiles; and before the mid-Jurassic (160 Ma) onset of rifting by removing the 360 km of continental extension estimated from the crustal structure of the 700 km wide junction zone. |
format |
Article in Journal/Newspaper |
author |
Veevers, J. J. Eittreim, S. L. |
author_facet |
Veevers, J. J. Eittreim, S. L. |
author_sort |
Veevers, J. J. |
title |
Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) |
title_short |
Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) |
title_full |
Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) |
title_fullStr |
Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) |
title_full_unstemmed |
Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) |
title_sort |
reconstruction of antarctica and australia at breakup (95 ± 5 ma) and before rifting (160 ma) |
publishDate |
1988 |
url |
https://researchers.mq.edu.au/en/publications/7f497427-403c-4028-9b39-36a1e9904138 https://doi.org/10.1080/08120098808729453 http://www.scopus.com/inward/record.url?scp=0024196527&partnerID=8YFLogxK |
genre |
Antarc* Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctica Wilkes Land |
op_source |
Veevers , J J & Eittreim , S L 1988 , ' Reconstruction of Antarctica and Australia at breakup (95 ± 5 Ma) and before rifting (160 Ma) ' , Australian Journal of Earth Sciences , vol. 35 , no. 3 , pp. 355-362 . https://doi.org/10.1080/08120098808729453 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1080/08120098808729453 |
container_title |
Australian Journal of Earth Sciences |
container_volume |
35 |
container_issue |
3 |
container_start_page |
355 |
op_container_end_page |
362 |
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1810289181657661440 |