Volcano-tectonic dynamics of Deception Island (Antarctica): 27 years of GPS observations (1991–2018)
Deception Island (South Shetland Islands) is one of the most active volcanoes in Antarctica. In the 1988–1989 austral summer, after the most recent eruptive process on the island (1967–1970), monitoring of volcanic activity through geophysical and geodetic techniques was resumed by Spanish and Argen...
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ftcsic:oai:digital.csic.es:10261/184010 2024-02-11T09:56:02+01:00 Volcano-tectonic dynamics of Deception Island (Antarctica): 27 years of GPS observations (1991–2018) Rosado, B. Fernández-Ros, A. Berrocoso, Manuel Prates, M. Gárate, J. de Gil, A. Geyer, Adelina Geyer, Adelina 2019-06 http://hdl.handle.net/10261/184010 en eng Elsevier Postprint https://doi.org/10.1016/j.jvolgeores.2019.05.009 Sí Journal of Volcanology and Geothermal Research, 381: 57-82 (2019) 0377-0273 http://hdl.handle.net/10261/184010 open Deception Island Volcano GNSS-GPS Stress-strain model Volcano geodesy Volcano-tectonic model 4D artículo http://purl.org/coar/resource_type/c_6501 2019 ftcsic https://doi.org/10.1016/j.jvolgeores.2019.05.009 2024-01-16T10:40:20Z Deception Island (South Shetland Islands) is one of the most active volcanoes in Antarctica. In the 1988–1989 austral summer, after the most recent eruptive process on the island (1967–1970), monitoring of volcanic activity through geophysical and geodetic techniques was resumed by Spanish and Argentinean scientists. In order to monitor the island's tectonic and volcanic behavior, a geodetic network was deployed. Currently, this network consists of 15 geodetic benchmarks located around Port Foster, Deception's inner bay open to the sea. Two additional geodetic benchmarks were installed outside Deception Island to be used as reference benchmarks for the differential positioning strategy. Since 1991–1992, geodetic ground-displacement velocities between the successive austral summer Antarctic campaigns have been computed and analyzed. The overall geodynamic behavior of Deception Island within the South Shetland Islands, Antarctic Peninsula and Bransfield Basin regional environment has been analyzed from geodetic ground-displacements. Results obtained demonstrate that Deception and Livingston island have a similar behavior derived from the Bransfield Basin extension and the Phoenix micro-plate subsidence processes. However, Deception Island is also highly influenced by its volcanic activity. Deception Island's volcanic behavior between 1991 and 2018 is shown by the velocity field, strain tensors and pressure source evolution obtained from the ground-displacements at the geodetic benchmarks. During this time period, it is possible to identify different inflation and deflation phases separated by transitional (or mixed) stages of extension without uplift and compression without subsidence. The most representative inflation and deflation periods were analyzed in detail, to show how they correlate with high and low seismic activity, respectively. The transitional or mixed stages, seem to be the precursors of the next inflation or deflation phase being the Bransfield basin rifting and NW-SE extension the potential ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island Livingston Island South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Austral South Shetland Islands Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Inner Bay ENVELOPE(-37.967,-37.967,-54.017,-54.017) Port Foster ENVELOPE(162.967,162.967,-78.400,-78.400) Journal of Volcanology and Geothermal Research 381 57 82 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Deception Island Volcano GNSS-GPS Stress-strain model Volcano geodesy Volcano-tectonic model 4D |
spellingShingle |
Deception Island Volcano GNSS-GPS Stress-strain model Volcano geodesy Volcano-tectonic model 4D Rosado, B. Fernández-Ros, A. Berrocoso, Manuel Prates, M. Gárate, J. de Gil, A. Geyer, Adelina Volcano-tectonic dynamics of Deception Island (Antarctica): 27 years of GPS observations (1991–2018) |
topic_facet |
Deception Island Volcano GNSS-GPS Stress-strain model Volcano geodesy Volcano-tectonic model 4D |
description |
Deception Island (South Shetland Islands) is one of the most active volcanoes in Antarctica. In the 1988–1989 austral summer, after the most recent eruptive process on the island (1967–1970), monitoring of volcanic activity through geophysical and geodetic techniques was resumed by Spanish and Argentinean scientists. In order to monitor the island's tectonic and volcanic behavior, a geodetic network was deployed. Currently, this network consists of 15 geodetic benchmarks located around Port Foster, Deception's inner bay open to the sea. Two additional geodetic benchmarks were installed outside Deception Island to be used as reference benchmarks for the differential positioning strategy. Since 1991–1992, geodetic ground-displacement velocities between the successive austral summer Antarctic campaigns have been computed and analyzed. The overall geodynamic behavior of Deception Island within the South Shetland Islands, Antarctic Peninsula and Bransfield Basin regional environment has been analyzed from geodetic ground-displacements. Results obtained demonstrate that Deception and Livingston island have a similar behavior derived from the Bransfield Basin extension and the Phoenix micro-plate subsidence processes. However, Deception Island is also highly influenced by its volcanic activity. Deception Island's volcanic behavior between 1991 and 2018 is shown by the velocity field, strain tensors and pressure source evolution obtained from the ground-displacements at the geodetic benchmarks. During this time period, it is possible to identify different inflation and deflation phases separated by transitional (or mixed) stages of extension without uplift and compression without subsidence. The most representative inflation and deflation periods were analyzed in detail, to show how they correlate with high and low seismic activity, respectively. The transitional or mixed stages, seem to be the precursors of the next inflation or deflation phase being the Bransfield basin rifting and NW-SE extension the potential ... |
author2 |
Geyer, Adelina |
format |
Article in Journal/Newspaper |
author |
Rosado, B. Fernández-Ros, A. Berrocoso, Manuel Prates, M. Gárate, J. de Gil, A. Geyer, Adelina |
author_facet |
Rosado, B. Fernández-Ros, A. Berrocoso, Manuel Prates, M. Gárate, J. de Gil, A. Geyer, Adelina |
author_sort |
Rosado, B. |
title |
Volcano-tectonic dynamics of Deception Island (Antarctica): 27 years of GPS observations (1991–2018) |
title_short |
Volcano-tectonic dynamics of Deception Island (Antarctica): 27 years of GPS observations (1991–2018) |
title_full |
Volcano-tectonic dynamics of Deception Island (Antarctica): 27 years of GPS observations (1991–2018) |
title_fullStr |
Volcano-tectonic dynamics of Deception Island (Antarctica): 27 years of GPS observations (1991–2018) |
title_full_unstemmed |
Volcano-tectonic dynamics of Deception Island (Antarctica): 27 years of GPS observations (1991–2018) |
title_sort |
volcano-tectonic dynamics of deception island (antarctica): 27 years of gps observations (1991–2018) |
publisher |
Elsevier |
publishDate |
2019 |
url |
http://hdl.handle.net/10261/184010 |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-37.967,-37.967,-54.017,-54.017) ENVELOPE(162.967,162.967,-78.400,-78.400) |
geographic |
Antarctic Antarctic Peninsula Austral South Shetland Islands Deception Island Livingston Island Inner Bay Port Foster |
geographic_facet |
Antarctic Antarctic Peninsula Austral South Shetland Islands Deception Island Livingston Island Inner Bay Port Foster |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island Livingston Island South Shetland Islands |
op_relation |
Postprint https://doi.org/10.1016/j.jvolgeores.2019.05.009 Sí Journal of Volcanology and Geothermal Research, 381: 57-82 (2019) 0377-0273 http://hdl.handle.net/10261/184010 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.jvolgeores.2019.05.009 |
container_title |
Journal of Volcanology and Geothermal Research |
container_volume |
381 |
container_start_page |
57 |
op_container_end_page |
82 |
_version_ |
1790600189582508032 |