Tectonic overview of the West Gondwana margin
The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one of the longest and longest-lived active continental margins known. It was the site of the 18,000 km Te...
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ftnerc:oai:nora.nerc.ac.uk:6325 2023-05-15T14:05:16+02:00 Tectonic overview of the West Gondwana margin Vaughan, Alan P.M. Pankhurst, Robert J. 2008 text http://nora.nerc.ac.uk/id/eprint/6325/ https://nora.nerc.ac.uk/id/eprint/6325/1/Vaughan_%26_Pankhurst_GR_focus_final_revised.pdf http://www.sciencedirect.com/science/journal/1342937X en eng Elsevier https://nora.nerc.ac.uk/id/eprint/6325/1/Vaughan_%26_Pankhurst_GR_focus_final_revised.pdf Vaughan, Alan P.M.; Pankhurst, Robert J. 2008 Tectonic overview of the West Gondwana margin. Gondwana Research, 13 (2). 150-162. https://doi.org/10.1016/j.gr.2007.07.004 <https://doi.org/10.1016/j.gr.2007.07.004> Earth Sciences Publication - Article PeerReviewed 2008 ftnerc https://doi.org/10.1016/j.gr.2007.07.004 2023-02-04T19:24:13Z The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one of the longest and longest-lived active continental margins known. It was the site of the 18,000 km Terra Australis orogen, which was initiated in Neoproterozoic times with the break-up of Rodinia, and evolved into the Mesozoic Australides. The Gondwana margin was completed, in Late Cambrian times, by closure of the Adamastor Ocean (between Brazilian and southwest African components) and the Mozambique Ocean (between East and West Gondwana), forming the Brasiliano-Pan-African mobile belts. During the Early Palaeozoic much of the southern margin was dominated by successive episodes of subduction-accretion. Eastern Australia, Northern Victoria Land and the Transantarctic Mountains were affected by one of the first of these events – the Late Cambrian Ross/Delamerian orogeny, remnants of which may be found in the Antarctic Peninsula – but also contain two accreted terranes of unknown age and origin. Similar events are recognized at the South American end of the margin, where the Cambrian Pampean orogeny occurred with dextral strike-slip along the western edge of the Río de la Plata craton, followed by an Ordovician active margin (Famatinian) associated with the collision of the Precordillera terrane. However, the central part of the margin (the Sierra de la Ventana of eastern Argentina, the Cape Fold Belt of South Africa and the Ellsworth Mountains of West Antarctica) seem to represent a passive margin during the Early Palaeozoic, with the accumulation of predominantly reworked continental sedimentary deposits (Du Toit's ‘Samfrau Geosyncline’). In many of the outer areas, accretion and intense granitic/rhyolitic magmatism continued during the Late Palaeozoic, with collision of several small continental terranes, many of which are nevertheless of Gondwana origin: e.g., southern Patagonia and (possibly) ‘Chilenia’ in the ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica New Zealand Victoria Land West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Patagonia West Antarctica Victoria Land Transantarctic Mountains New Zealand Argentina Ellsworth Mountains ENVELOPE(-85.000,-85.000,-78.750,-78.750) Terra Australis ENVELOPE(-62.900,-62.900,-64.900,-64.900) Gondwana Research 13 2 150 162 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Vaughan, Alan P.M. Pankhurst, Robert J. Tectonic overview of the West Gondwana margin |
topic_facet |
Earth Sciences |
description |
The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and Victoria Land to Eastern Australia is one of the longest and longest-lived active continental margins known. It was the site of the 18,000 km Terra Australis orogen, which was initiated in Neoproterozoic times with the break-up of Rodinia, and evolved into the Mesozoic Australides. The Gondwana margin was completed, in Late Cambrian times, by closure of the Adamastor Ocean (between Brazilian and southwest African components) and the Mozambique Ocean (between East and West Gondwana), forming the Brasiliano-Pan-African mobile belts. During the Early Palaeozoic much of the southern margin was dominated by successive episodes of subduction-accretion. Eastern Australia, Northern Victoria Land and the Transantarctic Mountains were affected by one of the first of these events – the Late Cambrian Ross/Delamerian orogeny, remnants of which may be found in the Antarctic Peninsula – but also contain two accreted terranes of unknown age and origin. Similar events are recognized at the South American end of the margin, where the Cambrian Pampean orogeny occurred with dextral strike-slip along the western edge of the Río de la Plata craton, followed by an Ordovician active margin (Famatinian) associated with the collision of the Precordillera terrane. However, the central part of the margin (the Sierra de la Ventana of eastern Argentina, the Cape Fold Belt of South Africa and the Ellsworth Mountains of West Antarctica) seem to represent a passive margin during the Early Palaeozoic, with the accumulation of predominantly reworked continental sedimentary deposits (Du Toit's ‘Samfrau Geosyncline’). In many of the outer areas, accretion and intense granitic/rhyolitic magmatism continued during the Late Palaeozoic, with collision of several small continental terranes, many of which are nevertheless of Gondwana origin: e.g., southern Patagonia and (possibly) ‘Chilenia’ in the ... |
format |
Article in Journal/Newspaper |
author |
Vaughan, Alan P.M. Pankhurst, Robert J. |
author_facet |
Vaughan, Alan P.M. Pankhurst, Robert J. |
author_sort |
Vaughan, Alan P.M. |
title |
Tectonic overview of the West Gondwana margin |
title_short |
Tectonic overview of the West Gondwana margin |
title_full |
Tectonic overview of the West Gondwana margin |
title_fullStr |
Tectonic overview of the West Gondwana margin |
title_full_unstemmed |
Tectonic overview of the West Gondwana margin |
title_sort |
tectonic overview of the west gondwana margin |
publisher |
Elsevier |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/6325/ https://nora.nerc.ac.uk/id/eprint/6325/1/Vaughan_%26_Pankhurst_GR_focus_final_revised.pdf http://www.sciencedirect.com/science/journal/1342937X |
long_lat |
ENVELOPE(-85.000,-85.000,-78.750,-78.750) ENVELOPE(-62.900,-62.900,-64.900,-64.900) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Patagonia West Antarctica Victoria Land Transantarctic Mountains New Zealand Argentina Ellsworth Mountains Terra Australis |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Patagonia West Antarctica Victoria Land Transantarctic Mountains New Zealand Argentina Ellsworth Mountains Terra Australis |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica New Zealand Victoria Land West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica New Zealand Victoria Land West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/6325/1/Vaughan_%26_Pankhurst_GR_focus_final_revised.pdf Vaughan, Alan P.M.; Pankhurst, Robert J. 2008 Tectonic overview of the West Gondwana margin. Gondwana Research, 13 (2). 150-162. https://doi.org/10.1016/j.gr.2007.07.004 <https://doi.org/10.1016/j.gr.2007.07.004> |
op_doi |
https://doi.org/10.1016/j.gr.2007.07.004 |
container_title |
Gondwana Research |
container_volume |
13 |
container_issue |
2 |
container_start_page |
150 |
op_container_end_page |
162 |
_version_ |
1766277078654648320 |