Surgeon island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Palaeopacific margin of Gondwana (northern Victoria Land, Antarctica)
Abstract 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 leadi...
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crwiley:10.1111/j.1365-3121.2005.00606.x 2024-09-09T19:07:39+00:00 Surgeon island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Palaeopacific margin of Gondwana (northern Victoria Land, Antarctica) Fioretti, A.M. Capponi, G. Black, L.P. Varne, R. Visona, D. 2005 http://dx.doi.org/10.1111/j.1365-3121.2005.00606.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.2005.00606.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.2005.00606.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Terra Nova volume 17, issue 3, page 242-249 ISSN 0954-4879 1365-3121 journal-article 2005 crwiley https://doi.org/10.1111/j.1365-3121.2005.00606.x 2024-07-25T04:18:45Z Abstract 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 Wiley Online Library 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 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract 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. |
format |
Article in Journal/Newspaper |
author |
Fioretti, A.M. Capponi, G. Black, L.P. Varne, R. Visona, D. |
spellingShingle |
Fioretti, A.M. Capponi, G. Black, L.P. Varne, R. Visona, D. Surgeon island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Palaeopacific margin of Gondwana (northern Victoria Land, Antarctica) |
author_facet |
Fioretti, A.M. Capponi, G. Black, L.P. Varne, R. Visona, D. |
author_sort |
Fioretti, A.M. |
title |
Surgeon island granite SHRIMP zircon ages: a clue for the Cambrian tectonic setting and evolution of the Palaeopacific 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 Palaeopacific 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 Palaeopacific 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 Palaeopacific 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 Palaeopacific 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 palaeopacific margin of gondwana (northern victoria land, antarctica) |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.1111/j.1365-3121.2005.00606.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.2005.00606.x https://onlinelibrary.wiley.com/doi/pdf/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_source |
Terra Nova volume 17, issue 3, page 242-249 ISSN 0954-4879 1365-3121 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
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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1809821805536346112 |