Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography
The mechanisms of continental growth are a crucial part of plate tectonic theory, yet a clear understanding of the processes involved remains elusive. Here we determine seismic Rayleigh wave phase anisotropy variations in the crust beneath the southern Tasmanides of Australia, a Paleozoic accretiona...
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Online Access: | https://doi.org/10.1002/2016GL071201 http://ecite.utas.edu.au/114747 |
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ftunivtasecite:oai:ecite.utas.edu.au:114747 2023-05-15T13:49:03+02:00 Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography Pilia, S Arroucau, P Rawlinson, N Reading, AM Cayley, RA 2016 https://doi.org/10.1002/2016GL071201 http://ecite.utas.edu.au/114747 en eng Amer Geophysical Union http://dx.doi.org/10.1002/2016GL071201 http://purl.org/au-research/grants/arc/LP110100256 Pilia, S and Arroucau, P and Rawlinson, N and Reading, AM and Cayley, RA, Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography, Geophysical Research Letters, 43, (23) pp. 12082-12090. ISSN 0094-8276 (2016) [Refereed Article] http://ecite.utas.edu.au/114747 Earth Sciences Geophysics Seismology and Seismic Exploration Refereed Article PeerReviewed 2016 ftunivtasecite https://doi.org/10.1002/2016GL071201 2019-12-13T22:14:37Z The mechanisms of continental growth are a crucial part of plate tectonic theory, yet a clear understanding of the processes involved remains elusive. Here we determine seismic Rayleigh wave phase anisotropy variations in the crust beneath the southern Tasmanides of Australia, a Paleozoic accretionary margin. Our results reveal a complex, thick-skinned pervasive deformation that was driven by the tectonic interaction between the proto-Pacific Ocean and the ancient eastern margin of Gondwana. Stress-induced effects triggered by the collision and entrainment of a microcontinent into the active subduction zone are evident in the anisotropy signature. The paleofracturing trend of failed rifting between Australia and Antarctica is also recorded in the anisotropy pattern as well as a tightly curved feature in central Tasmania. The observed patterns of anisotropy correlate well with recent geodynamic and kinematic models of the Tasmanides and provide a platform from which the spatial extent of deformational domains can be refined. Article in Journal/Newspaper Antarc* Antarctica eCite UTAS (University of Tasmania) Pacific Geophysical Research Letters 43 23 12,082 12,090 |
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eCite UTAS (University of Tasmania) |
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English |
topic |
Earth Sciences Geophysics Seismology and Seismic Exploration |
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Earth Sciences Geophysics Seismology and Seismic Exploration Pilia, S Arroucau, P Rawlinson, N Reading, AM Cayley, RA Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography |
topic_facet |
Earth Sciences Geophysics Seismology and Seismic Exploration |
description |
The mechanisms of continental growth are a crucial part of plate tectonic theory, yet a clear understanding of the processes involved remains elusive. Here we determine seismic Rayleigh wave phase anisotropy variations in the crust beneath the southern Tasmanides of Australia, a Paleozoic accretionary margin. Our results reveal a complex, thick-skinned pervasive deformation that was driven by the tectonic interaction between the proto-Pacific Ocean and the ancient eastern margin of Gondwana. Stress-induced effects triggered by the collision and entrainment of a microcontinent into the active subduction zone are evident in the anisotropy signature. The paleofracturing trend of failed rifting between Australia and Antarctica is also recorded in the anisotropy pattern as well as a tightly curved feature in central Tasmania. The observed patterns of anisotropy correlate well with recent geodynamic and kinematic models of the Tasmanides and provide a platform from which the spatial extent of deformational domains can be refined. |
format |
Article in Journal/Newspaper |
author |
Pilia, S Arroucau, P Rawlinson, N Reading, AM Cayley, RA |
author_facet |
Pilia, S Arroucau, P Rawlinson, N Reading, AM Cayley, RA |
author_sort |
Pilia, S |
title |
Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography |
title_short |
Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography |
title_full |
Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography |
title_fullStr |
Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography |
title_full_unstemmed |
Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography |
title_sort |
inherited crustal deformation along the east gondwana margin revealed by seismic anisotropy tomography |
publisher |
Amer Geophysical Union |
publishDate |
2016 |
url |
https://doi.org/10.1002/2016GL071201 http://ecite.utas.edu.au/114747 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
http://dx.doi.org/10.1002/2016GL071201 http://purl.org/au-research/grants/arc/LP110100256 Pilia, S and Arroucau, P and Rawlinson, N and Reading, AM and Cayley, RA, Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography, Geophysical Research Letters, 43, (23) pp. 12082-12090. ISSN 0094-8276 (2016) [Refereed Article] http://ecite.utas.edu.au/114747 |
op_doi |
https://doi.org/10.1002/2016GL071201 |
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Geophysical Research Letters |
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43 |
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23 |
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12,082 |
op_container_end_page |
12,090 |
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1766250689145602048 |