Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup
The Antarctic Peninsula is the largest of ~ twelve micro-continental fragments between southern South America, East Antarctica, and New Zealand. Their original positions and movement history following Gondwana breakup are poorly constrained. Recent work on the Antarctic Peninsula fore-arc/arc/back-a...
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ftnerc:oai:nora.nerc.ac.uk:13014 2023-05-15T13:45:11+02:00 Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup Willan, Robert C.R. 2003 http://nora.nerc.ac.uk/id/eprint/13014/ http://jsedres.sepmonline.org/content/73/6/1062.abstract unknown Society for Sedimentary Geology Willan, Robert C.R. 2003 Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup. Journal of Sedimentary Research, 73 (6). 1062-1077. https://doi.org/10.1306/050103731062 <https://doi.org/10.1306/050103731062> Earth Sciences Publication - Article PeerReviewed 2003 ftnerc https://doi.org/10.1306/050103731062 2023-02-04T19:28:22Z The Antarctic Peninsula is the largest of ~ twelve micro-continental fragments between southern South America, East Antarctica, and New Zealand. Their original positions and movement history following Gondwana breakup are poorly constrained. Recent work on the Antarctic Peninsula fore-arc/arc/back-arc suggests it consists of two suspect terranes that originated elsewhere and collided with the Pacific margin of Gondwana in the Cretaceous. This study reviews provenance models for three laterally extensive, kilometers-thick sedimentary units in the Antarctic Peninsula using previous studies, and new sandstone detrital modes and chemistry. 1) The Trinity Peninsula Group accretionary complex (Triassic) was possibly derived from a glaciated continental margin and may consist of several accreted tracts. The deformed, quartzose View Point and Legoupil formations were eroded from a deeply eroded, stable continental margin containing an old arc and mature quartzose sandstones, with provenance ages suggesting sources in north Patagonia and local Antarctic Peninsula basement. The weakly deformed and more feldspathic Hope Bay Formation was derived from an eroded arc, possibly the early Permian arc of the North Patagonian massif. 2) The LeMay Group accretionary complex (middle Triassic-middle Cretaceous) is dominated by arkoses derived from an eroded continental margin of Carboniferous and Permian age, possibly in the Marie Byrd Land sector, with several belts of volcanilithic sandstones representing episodes of arc magmatism. The youngest part of the LeMay Group contains abundant metamorphic detritus derived from basement uplifted during mid-Cretaceous terrane docking. 3) The Latady Formation in the southern Antarctic Peninsula has a completely different petrology, comprising mature sublitharenites (~ 190 Ma) of Gondwanan provenance, deposited in restricted rift basins. Younger volcanic litharenites (180 Ma) are dominated by REE-enriched low Eu/Eu* rhyolitic material, eroded from silicic calderas associated with Gondwana ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Marie Byrd Land Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Byrd East Antarctica Hope Bay ENVELOPE(-57.038,-57.038,-63.403,-63.403) Latady ENVELOPE(-65.833,-65.833,-75.500,-75.500) Legoupil ENVELOPE(-57.885,-57.885,-63.315,-63.315) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) New Zealand Pacific Patagonia The Antarctic Trinity Peninsula ENVELOPE(-58.000,-58.000,-63.500,-63.500) Journal of Sedimentary Research 73 6 1062 1077 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Willan, Robert C.R. Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup |
topic_facet |
Earth Sciences |
description |
The Antarctic Peninsula is the largest of ~ twelve micro-continental fragments between southern South America, East Antarctica, and New Zealand. Their original positions and movement history following Gondwana breakup are poorly constrained. Recent work on the Antarctic Peninsula fore-arc/arc/back-arc suggests it consists of two suspect terranes that originated elsewhere and collided with the Pacific margin of Gondwana in the Cretaceous. This study reviews provenance models for three laterally extensive, kilometers-thick sedimentary units in the Antarctic Peninsula using previous studies, and new sandstone detrital modes and chemistry. 1) The Trinity Peninsula Group accretionary complex (Triassic) was possibly derived from a glaciated continental margin and may consist of several accreted tracts. The deformed, quartzose View Point and Legoupil formations were eroded from a deeply eroded, stable continental margin containing an old arc and mature quartzose sandstones, with provenance ages suggesting sources in north Patagonia and local Antarctic Peninsula basement. The weakly deformed and more feldspathic Hope Bay Formation was derived from an eroded arc, possibly the early Permian arc of the North Patagonian massif. 2) The LeMay Group accretionary complex (middle Triassic-middle Cretaceous) is dominated by arkoses derived from an eroded continental margin of Carboniferous and Permian age, possibly in the Marie Byrd Land sector, with several belts of volcanilithic sandstones representing episodes of arc magmatism. The youngest part of the LeMay Group contains abundant metamorphic detritus derived from basement uplifted during mid-Cretaceous terrane docking. 3) The Latady Formation in the southern Antarctic Peninsula has a completely different petrology, comprising mature sublitharenites (~ 190 Ma) of Gondwanan provenance, deposited in restricted rift basins. Younger volcanic litharenites (180 Ma) are dominated by REE-enriched low Eu/Eu* rhyolitic material, eroded from silicic calderas associated with Gondwana ... |
format |
Article in Journal/Newspaper |
author |
Willan, Robert C.R. |
author_facet |
Willan, Robert C.R. |
author_sort |
Willan, Robert C.R. |
title |
Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup |
title_short |
Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup |
title_full |
Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup |
title_fullStr |
Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup |
title_full_unstemmed |
Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup |
title_sort |
provenance of triassic - cretaceous sandstones in the antarctic peninsula: implications for terrane models during gondwana breakup |
publisher |
Society for Sedimentary Geology |
publishDate |
2003 |
url |
http://nora.nerc.ac.uk/id/eprint/13014/ http://jsedres.sepmonline.org/content/73/6/1062.abstract |
long_lat |
ENVELOPE(-57.038,-57.038,-63.403,-63.403) ENVELOPE(-65.833,-65.833,-75.500,-75.500) ENVELOPE(-57.885,-57.885,-63.315,-63.315) ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-58.000,-58.000,-63.500,-63.500) |
geographic |
Antarctic Antarctic Peninsula Byrd East Antarctica Hope Bay Latady Legoupil Marie Byrd Land New Zealand Pacific Patagonia The Antarctic Trinity Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula Byrd East Antarctica Hope Bay Latady Legoupil Marie Byrd Land New Zealand Pacific Patagonia The Antarctic Trinity Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Marie Byrd Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Marie Byrd Land |
op_relation |
Willan, Robert C.R. 2003 Provenance of Triassic - Cretaceous sandstones in the Antarctic Peninsula: implications for terrane models during Gondwana breakup. Journal of Sedimentary Research, 73 (6). 1062-1077. https://doi.org/10.1306/050103731062 <https://doi.org/10.1306/050103731062> |
op_doi |
https://doi.org/10.1306/050103731062 |
container_title |
Journal of Sedimentary Research |
container_volume |
73 |
container_issue |
6 |
container_start_page |
1062 |
op_container_end_page |
1077 |
_version_ |
1766215334180683776 |