The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map
Over the last few decades, numerous geological studies have been carried out in the South Shetland Islands, which have greatly contributed to a better understanding of its geological evolution. However, few attempts have been conducted to correlate the geological units throughout this archipelago. W...
Published in: | Frontiers in Earth Science |
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ftnerc:oai:nora.nerc.ac.uk:532946 2023-05-15T13:41:46+02:00 The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map Bastías, Joaquín Chew, David Villanueva, Camila Riley, Teal Manfroi, Joseline Trevisan, Cristine Leppe, Marcelo Castillo, Paula Poblete, Fernando Tetzner, Dieter Giuliani, Gregory López, Bastián Chen, Hong Zheng, Guang-Gao Zhao, Yue Rauch, Anna Jaña, Ricardo A. 2023-01-12 text http://nora.nerc.ac.uk/id/eprint/532946/ https://nora.nerc.ac.uk/id/eprint/532946/1/feart-10-1002760.pdf https://www.frontiersin.org/articles/10.3389/feart.2022.1002760/full en eng Frontiers Media https://nora.nerc.ac.uk/id/eprint/532946/1/feart-10-1002760.pdf Bastías, Joaquín; Chew, David; Villanueva, Camila; Riley, Teal orcid:0000-0002-3333-5021 Manfroi, Joseline; Trevisan, Cristine; Leppe, Marcelo; Castillo, Paula; Poblete, Fernando; Tetzner, Dieter orcid:0000-0001-7659-8799 Giuliani, Gregory; López, Bastián; Chen, Hong; Zheng, Guang-Gao; Zhao, Yue; Rauch, Anna; Jaña, Ricardo A. 2023 The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map. Frontiers in Earth Science, 10, 1002760. 24, pp. https://doi.org/10.3389/feart.2022.1002760 <https://doi.org/10.3389/feart.2022.1002760> cc_by_4 CC-BY Publication - Article PeerReviewed 2023 ftnerc https://doi.org/10.3389/feart.2022.1002760 2023-02-04T19:53:25Z Over the last few decades, numerous geological studies have been carried out in the South Shetland Islands, which have greatly contributed to a better understanding of its geological evolution. However, few attempts have been conducted to correlate the geological units throughout this archipelago. We present herein a lithostratigraphical correlation, which constitutes a coherent and unified stratigraphy for the main Mesozoic and Cenozoic units rocks of the South Shetland Islands along with a new geological map. The lithostratigraphical correlation shows that the geological evolution comprises three main stages: (i) deep marine sedimentation from ~164 to 140 Ma, (ii) subaerial volcanism and sedimentation with a proliferation of plants and fauna from ~140 to 35 Ma and (iii) glacial and interglacial deposits from ~35 Ma. The lithostratigraphical correlation also shows a broad geographical trend of decreasing age of volcanism from southwest to northeast, which has been previously suggested. However, this spatial age trend is disrupted by the presence of Eocene magmatism in Livingston Island, located in the centre of the archipelago. We suggest that the migration of volcanism occurred from the Late Cretaceous until the early Eocene. Subsequently, enhanced magmatic activity took place from the mid-Eocene until the Miocene, which we associate with processes related with the waning of subduction, such as roll-back. Finally, constraining the protolith age of the metamorphic complex of Smith Island remains challenging, yet holds key implications for the tectonic and accretionary evolution of the Antarctic Peninsula. The rocks recording the glaciation of this sector of Antarctica are well exposed in the northern South Shetland Islands and hold critical information for understanding the timings and processes that lead to the greenhouse-icehouse transition towards the Eocene end. Contemporaneous rocks to the breakup of Antarctic Peninsula from Patagonia, which led to the Drake Passage opening and the development of the ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Drake Passage Livingston Island Smith Island South Shetland Islands Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Patagonia Drake Passage South Shetland Islands Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Smith Island ENVELOPE(-62.520,-62.520,-62.981,-62.981) Frontiers in Earth Science 10 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Over the last few decades, numerous geological studies have been carried out in the South Shetland Islands, which have greatly contributed to a better understanding of its geological evolution. However, few attempts have been conducted to correlate the geological units throughout this archipelago. We present herein a lithostratigraphical correlation, which constitutes a coherent and unified stratigraphy for the main Mesozoic and Cenozoic units rocks of the South Shetland Islands along with a new geological map. The lithostratigraphical correlation shows that the geological evolution comprises three main stages: (i) deep marine sedimentation from ~164 to 140 Ma, (ii) subaerial volcanism and sedimentation with a proliferation of plants and fauna from ~140 to 35 Ma and (iii) glacial and interglacial deposits from ~35 Ma. The lithostratigraphical correlation also shows a broad geographical trend of decreasing age of volcanism from southwest to northeast, which has been previously suggested. However, this spatial age trend is disrupted by the presence of Eocene magmatism in Livingston Island, located in the centre of the archipelago. We suggest that the migration of volcanism occurred from the Late Cretaceous until the early Eocene. Subsequently, enhanced magmatic activity took place from the mid-Eocene until the Miocene, which we associate with processes related with the waning of subduction, such as roll-back. Finally, constraining the protolith age of the metamorphic complex of Smith Island remains challenging, yet holds key implications for the tectonic and accretionary evolution of the Antarctic Peninsula. The rocks recording the glaciation of this sector of Antarctica are well exposed in the northern South Shetland Islands and hold critical information for understanding the timings and processes that lead to the greenhouse-icehouse transition towards the Eocene end. Contemporaneous rocks to the breakup of Antarctic Peninsula from Patagonia, which led to the Drake Passage opening and the development of the ... |
format |
Article in Journal/Newspaper |
author |
Bastías, Joaquín Chew, David Villanueva, Camila Riley, Teal Manfroi, Joseline Trevisan, Cristine Leppe, Marcelo Castillo, Paula Poblete, Fernando Tetzner, Dieter Giuliani, Gregory López, Bastián Chen, Hong Zheng, Guang-Gao Zhao, Yue Rauch, Anna Jaña, Ricardo A. |
spellingShingle |
Bastías, Joaquín Chew, David Villanueva, Camila Riley, Teal Manfroi, Joseline Trevisan, Cristine Leppe, Marcelo Castillo, Paula Poblete, Fernando Tetzner, Dieter Giuliani, Gregory López, Bastián Chen, Hong Zheng, Guang-Gao Zhao, Yue Rauch, Anna Jaña, Ricardo A. The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map |
author_facet |
Bastías, Joaquín Chew, David Villanueva, Camila Riley, Teal Manfroi, Joseline Trevisan, Cristine Leppe, Marcelo Castillo, Paula Poblete, Fernando Tetzner, Dieter Giuliani, Gregory López, Bastián Chen, Hong Zheng, Guang-Gao Zhao, Yue Rauch, Anna Jaña, Ricardo A. |
author_sort |
Bastías, Joaquín |
title |
The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map |
title_short |
The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map |
title_full |
The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map |
title_fullStr |
The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map |
title_full_unstemmed |
The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map |
title_sort |
south shetland islands, antarctica: unified lithostratigraphy and geological map |
publisher |
Frontiers Media |
publishDate |
2023 |
url |
http://nora.nerc.ac.uk/id/eprint/532946/ https://nora.nerc.ac.uk/id/eprint/532946/1/feart-10-1002760.pdf https://www.frontiersin.org/articles/10.3389/feart.2022.1002760/full |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-62.520,-62.520,-62.981,-62.981) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Patagonia Drake Passage South Shetland Islands Livingston Island Smith Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Patagonia Drake Passage South Shetland Islands Livingston Island Smith Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Drake Passage Livingston Island Smith Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Drake Passage Livingston Island Smith Island South Shetland Islands |
op_relation |
https://nora.nerc.ac.uk/id/eprint/532946/1/feart-10-1002760.pdf Bastías, Joaquín; Chew, David; Villanueva, Camila; Riley, Teal orcid:0000-0002-3333-5021 Manfroi, Joseline; Trevisan, Cristine; Leppe, Marcelo; Castillo, Paula; Poblete, Fernando; Tetzner, Dieter orcid:0000-0001-7659-8799 Giuliani, Gregory; López, Bastián; Chen, Hong; Zheng, Guang-Gao; Zhao, Yue; Rauch, Anna; Jaña, Ricardo A. 2023 The South Shetland Islands, Antarctica: unified lithostratigraphy and geological map. Frontiers in Earth Science, 10, 1002760. 24, pp. https://doi.org/10.3389/feart.2022.1002760 <https://doi.org/10.3389/feart.2022.1002760> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2022.1002760 |
container_title |
Frontiers in Earth Science |
container_volume |
10 |
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1766157935201746944 |