Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula
The South Shetland Islands archipelago is dynamically complex due to its tectonic surroundings.Most islands are part of a formerly active volcanic arc, although Deception, Penguin and Bridgeman Islands, aswell as several submarine volcanoes, are characterized by active back-arc volcanism. Geodetic b...
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ftunivlisboa:oai:repositorio.ul.pt:10451/28097 2023-05-15T13:37:42+02:00 Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula Berrocoso, M. Fernández-Ros, A. Prates, Gonçalo García, A. Kraus, S. 2017-06-19T15:06:59Z http://hdl.handle.net/10451/28097 https://doi.org/10.1016/j.tecto.2015.10.023 eng eng Elsevier Tectonophysics 666 (2016) 211–219 0040-1951 http://hdl.handle.net/10451/28097 doi:10.1016/j.tecto.2015.10.023 closedAccess Geodesy Tectonic deformation Geodynamic regions South Shetland Islands Antarctic Peninsula article 2017 ftunivlisboa https://doi.org/10.1016/j.tecto.2015.10.023 2022-05-25T18:36:49Z The South Shetland Islands archipelago is dynamically complex due to its tectonic surroundings.Most islands are part of a formerly active volcanic arc, although Deception, Penguin and Bridgeman Islands, aswell as several submarine volcanoes, are characterized by active back-arc volcanism. Geodetic benchmarks were deployed and the movement of the lithosphere to which they were fixed measured to provide geodynamic insight for the South Shetland Islands, Bransfield Basin and Antarctic Peninsula area based on surface deformation. These benchmarks' data add spatial and temporal coverage to previous results. The results reveal two different geodynamic patterns, each confined to a distinct part of the South Shetland Islands archipelago. The inferred absolute horizontal velocity vectors for the benchmarks in the northeastern part of the archipelago are consistent with the opening of the Bransfield Basin, while benchmark vectors in the southwestern part of the archipelago are similar to those of the benchmarks on the Antarctic Peninsula. In between, Snow, Deception and Livingston Islands represent a transition zone. In this area, the horizontal velocity vectors relative to the Antarctic plate shift northeastwards from N toNW. Furthermore, the South Shetland Islands benchmarks, except for that at Gibbs (Elephant) Islands, indicate subsidence, which might be a consequence of the slab roll-back at the South Shetland Trench. In contrast, the uplift revealed by the Antarctic Peninsula benchmarks suggests glacial isostatic adjustment after the Larson Bice-shelf breakup. info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula South Shetland Islands Universidade de Lisboa: repositório.UL Antarctic Antarctic Peninsula Bridgeman ENVELOPE(-56.733,-56.733,-62.067,-62.067) South Shetland Islands South Shetland Trench ENVELOPE(-59.500,-59.500,-61.000,-61.000) The Antarctic Tectonophysics 666 211 219 |
institution |
Open Polar |
collection |
Universidade de Lisboa: repositório.UL |
op_collection_id |
ftunivlisboa |
language |
English |
topic |
Geodesy Tectonic deformation Geodynamic regions South Shetland Islands Antarctic Peninsula |
spellingShingle |
Geodesy Tectonic deformation Geodynamic regions South Shetland Islands Antarctic Peninsula Berrocoso, M. Fernández-Ros, A. Prates, Gonçalo García, A. Kraus, S. Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula |
topic_facet |
Geodesy Tectonic deformation Geodynamic regions South Shetland Islands Antarctic Peninsula |
description |
The South Shetland Islands archipelago is dynamically complex due to its tectonic surroundings.Most islands are part of a formerly active volcanic arc, although Deception, Penguin and Bridgeman Islands, aswell as several submarine volcanoes, are characterized by active back-arc volcanism. Geodetic benchmarks were deployed and the movement of the lithosphere to which they were fixed measured to provide geodynamic insight for the South Shetland Islands, Bransfield Basin and Antarctic Peninsula area based on surface deformation. These benchmarks' data add spatial and temporal coverage to previous results. The results reveal two different geodynamic patterns, each confined to a distinct part of the South Shetland Islands archipelago. The inferred absolute horizontal velocity vectors for the benchmarks in the northeastern part of the archipelago are consistent with the opening of the Bransfield Basin, while benchmark vectors in the southwestern part of the archipelago are similar to those of the benchmarks on the Antarctic Peninsula. In between, Snow, Deception and Livingston Islands represent a transition zone. In this area, the horizontal velocity vectors relative to the Antarctic plate shift northeastwards from N toNW. Furthermore, the South Shetland Islands benchmarks, except for that at Gibbs (Elephant) Islands, indicate subsidence, which might be a consequence of the slab roll-back at the South Shetland Trench. In contrast, the uplift revealed by the Antarctic Peninsula benchmarks suggests glacial isostatic adjustment after the Larson Bice-shelf breakup. info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Berrocoso, M. Fernández-Ros, A. Prates, Gonçalo García, A. Kraus, S. |
author_facet |
Berrocoso, M. Fernández-Ros, A. Prates, Gonçalo García, A. Kraus, S. |
author_sort |
Berrocoso, M. |
title |
Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula |
title_short |
Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula |
title_full |
Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula |
title_fullStr |
Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula |
title_full_unstemmed |
Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula |
title_sort |
geodetic implications on block formation and geodynamic domains in the south shetland islands, antarctic peninsula |
publisher |
Elsevier |
publishDate |
2017 |
url |
http://hdl.handle.net/10451/28097 https://doi.org/10.1016/j.tecto.2015.10.023 |
long_lat |
ENVELOPE(-56.733,-56.733,-62.067,-62.067) ENVELOPE(-59.500,-59.500,-61.000,-61.000) |
geographic |
Antarctic Antarctic Peninsula Bridgeman South Shetland Islands South Shetland Trench The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Bridgeman South Shetland Islands South Shetland Trench The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula South Shetland Islands |
op_relation |
Tectonophysics 666 (2016) 211–219 0040-1951 http://hdl.handle.net/10451/28097 doi:10.1016/j.tecto.2015.10.023 |
op_rights |
closedAccess |
op_doi |
https://doi.org/10.1016/j.tecto.2015.10.023 |
container_title |
Tectonophysics |
container_volume |
666 |
container_start_page |
211 |
op_container_end_page |
219 |
_version_ |
1766096905457106944 |