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, as well as several submarine volcanoes, are characterized by active back-arc volcanism. Geodetic...
Published in: | Tectonophysics |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2015
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/128622 https://doi.org/10.1016/j.tecto.2015.10.023 |
id |
ftcsic:oai:digital.csic.es:10261/128622 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/128622 2024-02-11T09:58:08+01:00 Geodetic implications on block formation and geodynamic domains in the South Shetland Islands, Antarctic Peninsula Berrocoso, Manuel Fernández-Ros, A. Prates, G. García García, Alicia Kraus, S. 2015-11-15 http://hdl.handle.net/10261/128622 https://doi.org/10.1016/j.tecto.2015.10.023 en eng Elsevier Postprint http://dx.doi.org/10.1016/j.tecto.2015.10.023 Sí Tectonophysics, 666: 211-219 (2016) http://hdl.handle.net/10261/128622 doi:10.1016/j.tecto.2015.10.023 open Geodesy Tectonic deformation Geodynamic regions South Shetland Islands Antarctic Peninsula artículo http://purl.org/coar/resource_type/c_6501 2015 ftcsic https://doi.org/10.1016/j.tecto.2015.10.023 2024-01-16T10:13:38Z 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, as well 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 to NW. 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 B ice-shelf breakup. This geodetic research has been carried out with the support of the Spanish Ministry of Education and Science as part of the National Antarctic Program. The following research projects contributed directly to this work: “Recognition and fast evaluation of volcanic activity on Deception Island (GEODESY) (ANT1999-1430-E/HESP)”; “Geodetic Studies on Deception Island: deformation models, geoid determination and Scientific Information System ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Deception Island Ice Shelf South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Bridgeman ENVELOPE(-56.733,-56.733,-62.067,-62.067) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) 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 |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
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, Manuel Fernández-Ros, A. Prates, G. García García, Alicia 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, as well 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 to NW. 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 B ice-shelf breakup. This geodetic research has been carried out with the support of the Spanish Ministry of Education and Science as part of the National Antarctic Program. The following research projects contributed directly to this work: “Recognition and fast evaluation of volcanic activity on Deception Island (GEODESY) (ANT1999-1430-E/HESP)”; “Geodetic Studies on Deception Island: deformation models, geoid determination and Scientific Information System ... |
format |
Article in Journal/Newspaper |
author |
Berrocoso, Manuel Fernández-Ros, A. Prates, G. García García, Alicia Kraus, S. |
author_facet |
Berrocoso, Manuel Fernández-Ros, A. Prates, G. García García, Alicia Kraus, S. |
author_sort |
Berrocoso, Manuel |
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 |
2015 |
url |
http://hdl.handle.net/10261/128622 https://doi.org/10.1016/j.tecto.2015.10.023 |
long_lat |
ENVELOPE(-56.733,-56.733,-62.067,-62.067) ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(-59.500,-59.500,-61.000,-61.000) |
geographic |
Antarctic Antarctic Peninsula Bridgeman Deception Island South Shetland Islands South Shetland Trench The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Bridgeman Deception Island South Shetland Islands South Shetland Trench The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Deception Island Ice Shelf South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Deception Island Ice Shelf South Shetland Islands |
op_relation |
Postprint http://dx.doi.org/10.1016/j.tecto.2015.10.023 Sí Tectonophysics, 666: 211-219 (2016) http://hdl.handle.net/10261/128622 doi:10.1016/j.tecto.2015.10.023 |
op_rights |
open |
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_ |
1790593729249148928 |