New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula
Understanding the tectonic framework of the Antarctic Peninsula is hindered by a paucity of paleomagnetic data from key locations. In this study, we present paleomagnetic data from the South Shetland Islands, to the northwest of the Antarctic Peninsula, which provides valuable paleoposition constrai...
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American Geophysical Union
2021
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ftnerc:oai:nora.nerc.ac.uk:529576 2023-05-15T13:41:45+02:00 New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula Gao, Liang Pei, Junling Zhao, Yue Yang, Zhenyu Riley, Teal R. Liu, Xiaochun Zhang, Shuan-Hong Liu, Jian-Min 2021-11 text http://nora.nerc.ac.uk/id/eprint/529576/ https://nora.nerc.ac.uk/id/eprint/529576/1/2021JB022503.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JB022503 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/529576/1/2021JB022503.pdf Gao, Liang; Pei, Junling; Zhao, Yue; Yang, Zhenyu; Riley, Teal R. orcid:0000-0002-3333-5021 Liu, Xiaochun; Zhang, Shuan-Hong; Liu, Jian-Min. 2021 New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula. Journal of Geophysical Research: Solid Earth, 126 (11), e2021JB022503. 17, pp. https://doi.org/10.1029/2021JB022503 <https://doi.org/10.1029/2021JB022503> Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.1029/2021JB022503 2023-02-04T19:51:42Z Understanding the tectonic framework of the Antarctic Peninsula is hindered by a paucity of paleomagnetic data from key locations. In this study, we present paleomagnetic data from the South Shetland Islands, to the northwest of the Antarctic Peninsula, which provides valuable paleoposition constraints on the Western domain of the Antarctic Peninsula. We report a key reliable paleopole (58.1°S, 354.3°E, A95=6.3°) from Livingston Island in the South Shetland Islands at ∼102 Ma. Plate reconstruction models from the Early Cretaceous attach the South Shetland Islands to the Pacific margin of southern Patagonia-Fuegian Andes at ∼140 Ma. The South Shetland Islands then experienced southward translation to its current position to the northwest of the Antarctic Peninsula following counterclockwise rotation during ∼100-90 Ma. A similar counterclockwise rotation has also been identified from southern Patagonia-Fuegian Andes but is absent in the Antarctic Peninsula, suggesting a direct affinity between the South Shetland Islands and southern Patagonia-Fuegian Andes. However, the consistent, almost northward Cretaceous paleomagnetic declination in the Antarctic Peninsula, and the near-synchronous tectonic-magmatic history between the Antarctic Peninsula and the southern Patagonia-Fuegian Andes support an autochthonous continental subduction model for most of the Antarctic Peninsula. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Livingston Island South Shetland Islands Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Patagonia South Shetland Islands Pacific Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Journal of Geophysical Research: Solid Earth 126 11 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Understanding the tectonic framework of the Antarctic Peninsula is hindered by a paucity of paleomagnetic data from key locations. In this study, we present paleomagnetic data from the South Shetland Islands, to the northwest of the Antarctic Peninsula, which provides valuable paleoposition constraints on the Western domain of the Antarctic Peninsula. We report a key reliable paleopole (58.1°S, 354.3°E, A95=6.3°) from Livingston Island in the South Shetland Islands at ∼102 Ma. Plate reconstruction models from the Early Cretaceous attach the South Shetland Islands to the Pacific margin of southern Patagonia-Fuegian Andes at ∼140 Ma. The South Shetland Islands then experienced southward translation to its current position to the northwest of the Antarctic Peninsula following counterclockwise rotation during ∼100-90 Ma. A similar counterclockwise rotation has also been identified from southern Patagonia-Fuegian Andes but is absent in the Antarctic Peninsula, suggesting a direct affinity between the South Shetland Islands and southern Patagonia-Fuegian Andes. However, the consistent, almost northward Cretaceous paleomagnetic declination in the Antarctic Peninsula, and the near-synchronous tectonic-magmatic history between the Antarctic Peninsula and the southern Patagonia-Fuegian Andes support an autochthonous continental subduction model for most of the Antarctic Peninsula. |
format |
Article in Journal/Newspaper |
author |
Gao, Liang Pei, Junling Zhao, Yue Yang, Zhenyu Riley, Teal R. Liu, Xiaochun Zhang, Shuan-Hong Liu, Jian-Min |
spellingShingle |
Gao, Liang Pei, Junling Zhao, Yue Yang, Zhenyu Riley, Teal R. Liu, Xiaochun Zhang, Shuan-Hong Liu, Jian-Min New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula |
author_facet |
Gao, Liang Pei, Junling Zhao, Yue Yang, Zhenyu Riley, Teal R. Liu, Xiaochun Zhang, Shuan-Hong Liu, Jian-Min |
author_sort |
Gao, Liang |
title |
New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula |
title_short |
New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula |
title_full |
New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula |
title_fullStr |
New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula |
title_full_unstemmed |
New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula |
title_sort |
new paleomagnetic constraints on the cretaceous tectonic framework of the antarctic peninsula |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/529576/ https://nora.nerc.ac.uk/id/eprint/529576/1/2021JB022503.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JB022503 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Patagonia South Shetland Islands Pacific Livingston Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Patagonia South Shetland Islands Pacific Livingston Island |
genre |
Antarc* Antarctic Antarctic Peninsula Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Livingston Island South Shetland Islands |
op_relation |
https://nora.nerc.ac.uk/id/eprint/529576/1/2021JB022503.pdf Gao, Liang; Pei, Junling; Zhao, Yue; Yang, Zhenyu; Riley, Teal R. orcid:0000-0002-3333-5021 Liu, Xiaochun; Zhang, Shuan-Hong; Liu, Jian-Min. 2021 New paleomagnetic constraints on the Cretaceous tectonic framework of the Antarctic Peninsula. Journal of Geophysical Research: Solid Earth, 126 (11), e2021JB022503. 17, pp. https://doi.org/10.1029/2021JB022503 <https://doi.org/10.1029/2021JB022503> |
op_doi |
https://doi.org/10.1029/2021JB022503 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
126 |
container_issue |
11 |
_version_ |
1766157263445164032 |