Arc accretion to the early Paleozoic Antarctic margin of Gondwana in Victoria Land
The Antarctic Ross Orogen was built up during the early Paleozoic in the framework of the convergence between the Paleo-Pacific oceanic plate and the Gondwana continental margin. Models for the Ross Orogen in northern Victoria Land are based on terranes having a variable provenance with respect to t...
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ftunivpisairis:oai:arpi.unipi.it:11568/144230 2024-04-14T08:02:11+00:00 Arc accretion to the early Paleozoic Antarctic margin of Gondwana in Victoria Land ROCCHI, SERGIO GEMELLI, MAURIZIO BRACCIALI L DI VINCENZO G GHEZZO C. Rocchi, Sergio Bracciali, L DI VINCENZO, G Gemelli, Maurizio Ghezzo, C. 2011 STAMPA http://hdl.handle.net/11568/144230 https://doi.org/10.1016/j.gr.2010.08.001 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000289047000004 volume:19 issue:3 firstpage:594 lastpage:607 numberofpages:14 journal:GONDWANA RESEARCH http://hdl.handle.net/11568/144230 doi:10.1016/j.gr.2010.08.001 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79952071692 info:eu-repo/semantics/restrictedAccess Magmatic arc Backarc Accretion Antarctica Ross-Delamerian Orogeny info:eu-repo/semantics/article 2011 ftunivpisairis https://doi.org/10.1016/j.gr.2010.08.001 2024-03-21T18:32:45Z The Antarctic Ross Orogen was built up during the early Paleozoic in the framework of the convergence between the Paleo-Pacific oceanic plate and the Gondwana continental margin. Models for the Ross Orogen in northern Victoria Land are based on terranes having a variable provenance with respect to the margin. However, recent studies provide evidence for the occurrence of different pieces of the lithospheric puzzle: (i) the Wilson continental magmatic arc, representing the main part of the active Gondwana margin, (ii) the Bowers arc–backarc system, (iii) the Admiralty crustal ribbon including continental material of the Wilson forearc, and (iv) the newly discovered, Cambrian oceanic magmatic Tiger arc, along the Ross Sea coast. An updated model is presented in which, after the Early Cambrian magmatic activity of the Wilson arc, a retreat of the subduction zone in the Early–Middle Cambrian gave way to boudinage of the Wilson forearc, trenchward arc migration, opening of the Bowers backarc basin and inception of the outboard Tiger subduction zone. Renewed convergence resulted in the development of the Middle Cambrian Bowers arc, closure of the backarc and deep underthrusting of portions of it at the Middle–Late Cambrian. Finally, in the latest Cambrian to earliest Ordovician, fast exhumation was coupled in the north with erosion and sediment shed to the northeast, and with extension and potassic magmatism in central and southern Victoria Land. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic Bowers ENVELOPE(164.083,164.083,-85.000,-85.000) Pacific Ross Sea The Antarctic Victoria Land Gondwana Research 19 3 594 607 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Magmatic arc Backarc Accretion Antarctica Ross-Delamerian Orogeny |
spellingShingle |
Magmatic arc Backarc Accretion Antarctica Ross-Delamerian Orogeny ROCCHI, SERGIO GEMELLI, MAURIZIO BRACCIALI L DI VINCENZO G GHEZZO C. Arc accretion to the early Paleozoic Antarctic margin of Gondwana in Victoria Land |
topic_facet |
Magmatic arc Backarc Accretion Antarctica Ross-Delamerian Orogeny |
description |
The Antarctic Ross Orogen was built up during the early Paleozoic in the framework of the convergence between the Paleo-Pacific oceanic plate and the Gondwana continental margin. Models for the Ross Orogen in northern Victoria Land are based on terranes having a variable provenance with respect to the margin. However, recent studies provide evidence for the occurrence of different pieces of the lithospheric puzzle: (i) the Wilson continental magmatic arc, representing the main part of the active Gondwana margin, (ii) the Bowers arc–backarc system, (iii) the Admiralty crustal ribbon including continental material of the Wilson forearc, and (iv) the newly discovered, Cambrian oceanic magmatic Tiger arc, along the Ross Sea coast. An updated model is presented in which, after the Early Cambrian magmatic activity of the Wilson arc, a retreat of the subduction zone in the Early–Middle Cambrian gave way to boudinage of the Wilson forearc, trenchward arc migration, opening of the Bowers backarc basin and inception of the outboard Tiger subduction zone. Renewed convergence resulted in the development of the Middle Cambrian Bowers arc, closure of the backarc and deep underthrusting of portions of it at the Middle–Late Cambrian. Finally, in the latest Cambrian to earliest Ordovician, fast exhumation was coupled in the north with erosion and sediment shed to the northeast, and with extension and potassic magmatism in central and southern Victoria Land. |
author2 |
Rocchi, Sergio Bracciali, L DI VINCENZO, G Gemelli, Maurizio Ghezzo, C. |
format |
Article in Journal/Newspaper |
author |
ROCCHI, SERGIO GEMELLI, MAURIZIO BRACCIALI L DI VINCENZO G GHEZZO C. |
author_facet |
ROCCHI, SERGIO GEMELLI, MAURIZIO BRACCIALI L DI VINCENZO G GHEZZO C. |
author_sort |
ROCCHI, SERGIO |
title |
Arc accretion to the early Paleozoic Antarctic margin of Gondwana in Victoria Land |
title_short |
Arc accretion to the early Paleozoic Antarctic margin of Gondwana in Victoria Land |
title_full |
Arc accretion to the early Paleozoic Antarctic margin of Gondwana in Victoria Land |
title_fullStr |
Arc accretion to the early Paleozoic Antarctic margin of Gondwana in Victoria Land |
title_full_unstemmed |
Arc accretion to the early Paleozoic Antarctic margin of Gondwana in Victoria Land |
title_sort |
arc accretion to the early paleozoic antarctic margin of gondwana in victoria land |
publishDate |
2011 |
url |
http://hdl.handle.net/11568/144230 https://doi.org/10.1016/j.gr.2010.08.001 |
long_lat |
ENVELOPE(164.083,164.083,-85.000,-85.000) |
geographic |
Antarctic Bowers Pacific Ross Sea The Antarctic Victoria Land |
geographic_facet |
Antarctic Bowers Pacific Ross Sea The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000289047000004 volume:19 issue:3 firstpage:594 lastpage:607 numberofpages:14 journal:GONDWANA RESEARCH http://hdl.handle.net/11568/144230 doi:10.1016/j.gr.2010.08.001 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79952071692 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.gr.2010.08.001 |
container_title |
Gondwana Research |
container_volume |
19 |
container_issue |
3 |
container_start_page |
594 |
op_container_end_page |
607 |
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1796313203220676608 |