Australo-Antarctica in Gondwana: a view from the edge
Plate reconstructions that consider Neoproterozoic (770-750 Ma) paleomagnetic data from India and Australia imply significant (∼3000-5000 km) relative displacement between these continents before they reached their unified Gondwana fit by ∼540 Ma (Fig. 1; e.g., Li et al., 2013). Therefore, these mod...
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ftunivtasecite:oai:ecite.utas.edu.au:131202 2023-05-15T13:55:18+02:00 Australo-Antarctica in Gondwana: a view from the edge Halpin, JA Daczko, NR Whittaker, JM Fitzsimmons, ICW 2017 application/pdf http://geodynamics.curtin.edu.au/rodinia-2017/ http://ecite.utas.edu.au/131202 en eng Geological Society of Australia http://ecite.utas.edu.au/131202/1/Rodinia-abstract-volume 21-22_Halpin2017.pdf Halpin, JA and Daczko, NR and Whittaker, JM and Fitzsimmons, ICW, Australo-Antarctica in Gondwana: a view from the edge, Programs and Abstracts, Rodinia 2017 Conference, 11-14 June 2017, Townsville, Australia, pp. 7-8. (2017) [Conference Extract] http://ecite.utas.edu.au/131202 Earth Sciences Geology Geochronology Conference Extract NonPeerReviewed 2017 ftunivtasecite 2019-12-13T22:29:08Z Plate reconstructions that consider Neoproterozoic (770-750 Ma) paleomagnetic data from India and Australia imply significant (∼3000-5000 km) relative displacement between these continents before they reached their unified Gondwana fit by ∼540 Ma (Fig. 1; e.g., Li et al., 2013). Therefore, these models require a plate boundary (or boundaries) between Neoproterozoic India and Australia, with or without accreted terranes that may have been in between. The inferred plate boundary must also penetrate East Antarctica, separating the Indo-Antarctic and Australo-Antarctic blocks. However, there is considerable flexibility around the magnitude of displacement, as well as the nature of the motion, depending on: (1) the Euler pole selected using the 95% confidence level ellipses of the paleomagnetic data, and (2) the location and geometry of the plate boundary. These constraints have implications for the width of a pre-Gondwanan ocean basin between Indo-Antarctica and Australo-Antarctica, the timing of collision along the margin, and the tectonic style expected to be recorded in the rocks. Conference Object Antarc* Antarctic Antarctica East Antarctica eCite UTAS (University of Tasmania) Antarctic East Antarctica |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
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English |
topic |
Earth Sciences Geology Geochronology |
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Earth Sciences Geology Geochronology Halpin, JA Daczko, NR Whittaker, JM Fitzsimmons, ICW Australo-Antarctica in Gondwana: a view from the edge |
topic_facet |
Earth Sciences Geology Geochronology |
description |
Plate reconstructions that consider Neoproterozoic (770-750 Ma) paleomagnetic data from India and Australia imply significant (∼3000-5000 km) relative displacement between these continents before they reached their unified Gondwana fit by ∼540 Ma (Fig. 1; e.g., Li et al., 2013). Therefore, these models require a plate boundary (or boundaries) between Neoproterozoic India and Australia, with or without accreted terranes that may have been in between. The inferred plate boundary must also penetrate East Antarctica, separating the Indo-Antarctic and Australo-Antarctic blocks. However, there is considerable flexibility around the magnitude of displacement, as well as the nature of the motion, depending on: (1) the Euler pole selected using the 95% confidence level ellipses of the paleomagnetic data, and (2) the location and geometry of the plate boundary. These constraints have implications for the width of a pre-Gondwanan ocean basin between Indo-Antarctica and Australo-Antarctica, the timing of collision along the margin, and the tectonic style expected to be recorded in the rocks. |
format |
Conference Object |
author |
Halpin, JA Daczko, NR Whittaker, JM Fitzsimmons, ICW |
author_facet |
Halpin, JA Daczko, NR Whittaker, JM Fitzsimmons, ICW |
author_sort |
Halpin, JA |
title |
Australo-Antarctica in Gondwana: a view from the edge |
title_short |
Australo-Antarctica in Gondwana: a view from the edge |
title_full |
Australo-Antarctica in Gondwana: a view from the edge |
title_fullStr |
Australo-Antarctica in Gondwana: a view from the edge |
title_full_unstemmed |
Australo-Antarctica in Gondwana: a view from the edge |
title_sort |
australo-antarctica in gondwana: a view from the edge |
publisher |
Geological Society of Australia |
publishDate |
2017 |
url |
http://geodynamics.curtin.edu.au/rodinia-2017/ http://ecite.utas.edu.au/131202 |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
http://ecite.utas.edu.au/131202/1/Rodinia-abstract-volume 21-22_Halpin2017.pdf Halpin, JA and Daczko, NR and Whittaker, JM and Fitzsimmons, ICW, Australo-Antarctica in Gondwana: a view from the edge, Programs and Abstracts, Rodinia 2017 Conference, 11-14 June 2017, Townsville, Australia, pp. 7-8. (2017) [Conference Extract] http://ecite.utas.edu.au/131202 |
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1766261695839207424 |