Surgeon Island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Paleopacific margin of Gondwana (northern Victoria Land, Antarctica)
In northern Victoria Land (NVL), Antarctica, the palaeopacific margin of Gondwana is made up of the inboard Wilson (WT) and the two outboard Bowers (BT) and Robertson Bay (RBT) terranes. The occurrence of a Cambro-Ordovician magmatic arc in the WT argues for a southwestward subduction leading to the...
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ftunivpadovairis:oai:www.research.unipd.it:11577/1377193 2024-04-14T08:03:22+00:00 Surgeon Island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Paleopacific margin of Gondwana (northern Victoria Land, Antarctica) FIORETTI A. M. CAPPONI G. BLACK L. P. VARNE R. VISONA', DARIO Fioretti, A. M. Capponi, G. Black, L. P. Varne, R. Visona', Dario 2005 STAMPA http://hdl.handle.net/11577/1377193 https://doi.org/10.1111/j.1365-3121.2005.00606.x eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000229390200006 volume:17 firstpage:242 lastpage:249 numberofpages:8 journal:TERRA NOVA http://hdl.handle.net/11577/1377193 doi:10.1111/j.1365-3121.2005.00606.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-20844442660 info:eu-repo/semantics/article 2005 ftunivpadovairis https://doi.org/10.1111/j.1365-3121.2005.00606.x 2024-03-21T18:57:21Z In northern Victoria Land (NVL), Antarctica, the palaeopacific margin of Gondwana is made up of the inboard Wilson (WT) and the two outboard Bowers (BT) and Robertson Bay (RBT) terranes. The occurrence of a Cambro-Ordovician magmatic arc in the WT argues for a southwestward subduction leading to the final configuration of this margin during the Ross–Delamerian Orogeny. A U-Pb SHRIMP crystallization age (511.7 ± 2.9 Ma) obtained on the Surgeon Island Granite (SIG), located at the eastern end of the RBT, indicates that the SIG also belongs to the Ross cycle, and provides evidence for multiple subduction zones during the Ross Orogeny. Structural observations show that the SIG and its country rocks are basement to the RBT turbidites. SIG inherited zircon ages indicate the occurrence of Proterozoic crust east of the RBT and constrains the location of the Proterozoic–Palaeozoic boundary in Cambrian Gondwana. Article in Journal/Newspaper Antarc* Antarctica Victoria Land Padua Research Archive (IRIS - Università degli Studi di Padova) Bowers ENVELOPE(164.083,164.083,-85.000,-85.000) Robertson Bay ENVELOPE(170.000,170.000,-71.417,-71.417) Surgeon Island ENVELOPE(166.983,166.983,-70.667,-70.667) Victoria Land Terra Nova 17 3 242 249 |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
description |
In northern Victoria Land (NVL), Antarctica, the palaeopacific margin of Gondwana is made up of the inboard Wilson (WT) and the two outboard Bowers (BT) and Robertson Bay (RBT) terranes. The occurrence of a Cambro-Ordovician magmatic arc in the WT argues for a southwestward subduction leading to the final configuration of this margin during the Ross–Delamerian Orogeny. A U-Pb SHRIMP crystallization age (511.7 ± 2.9 Ma) obtained on the Surgeon Island Granite (SIG), located at the eastern end of the RBT, indicates that the SIG also belongs to the Ross cycle, and provides evidence for multiple subduction zones during the Ross Orogeny. Structural observations show that the SIG and its country rocks are basement to the RBT turbidites. SIG inherited zircon ages indicate the occurrence of Proterozoic crust east of the RBT and constrains the location of the Proterozoic–Palaeozoic boundary in Cambrian Gondwana. |
author2 |
Fioretti, A. M. Capponi, G. Black, L. P. Varne, R. Visona', Dario |
format |
Article in Journal/Newspaper |
author |
FIORETTI A. M. CAPPONI G. BLACK L. P. VARNE R. VISONA', DARIO |
spellingShingle |
FIORETTI A. M. CAPPONI G. BLACK L. P. VARNE R. VISONA', DARIO Surgeon Island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Paleopacific margin of Gondwana (northern Victoria Land, Antarctica) |
author_facet |
FIORETTI A. M. CAPPONI G. BLACK L. P. VARNE R. VISONA', DARIO |
author_sort |
FIORETTI A. M. |
title |
Surgeon Island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Paleopacific margin of Gondwana (northern Victoria Land, Antarctica) |
title_short |
Surgeon Island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Paleopacific margin of Gondwana (northern Victoria Land, Antarctica) |
title_full |
Surgeon Island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Paleopacific margin of Gondwana (northern Victoria Land, Antarctica) |
title_fullStr |
Surgeon Island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Paleopacific margin of Gondwana (northern Victoria Land, Antarctica) |
title_full_unstemmed |
Surgeon Island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Paleopacific margin of Gondwana (northern Victoria Land, Antarctica) |
title_sort |
surgeon island granite shrimp zircon ages: a clue for the cambrian tectonic setting and evolution of the paleopacific margin of gondwana (northern victoria land, antarctica) |
publishDate |
2005 |
url |
http://hdl.handle.net/11577/1377193 https://doi.org/10.1111/j.1365-3121.2005.00606.x |
long_lat |
ENVELOPE(164.083,164.083,-85.000,-85.000) ENVELOPE(170.000,170.000,-71.417,-71.417) ENVELOPE(166.983,166.983,-70.667,-70.667) |
geographic |
Bowers Robertson Bay Surgeon Island Victoria Land |
geographic_facet |
Bowers Robertson Bay Surgeon Island Victoria Land |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000229390200006 volume:17 firstpage:242 lastpage:249 numberofpages:8 journal:TERRA NOVA http://hdl.handle.net/11577/1377193 doi:10.1111/j.1365-3121.2005.00606.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-20844442660 |
op_doi |
https://doi.org/10.1111/j.1365-3121.2005.00606.x |
container_title |
Terra Nova |
container_volume |
17 |
container_issue |
3 |
container_start_page |
242 |
op_container_end_page |
249 |
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1796299626343563264 |