The fracture system and the melt emplacement beneath the Deception Island active volcano, South Shetland Islands, Antarctica
Abstract A new magnetotelluric (MT) survey, along with new topographic parametric sonar (TOPAS) profiles and geological field observations, were carried out on the Deception Island active volcano. 3-D resistivity models reveal an ENE–WSW elongated conductor located at a depth between two and ten kil...
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crcambridgeupr:10.1017/s0954102011000794 2024-09-15T17:48:40+00:00 The fracture system and the melt emplacement beneath the Deception Island active volcano, South Shetland Islands, Antarctica Pedrera, Antonio Ruiz-Constán, Ana Heredia, Nemesio Galindo-Zaldívar, Jesús Bohoyo, Fernando Marín-Lechado, Carlos Ruano, Patricia Somoza, Luis 2011 http://dx.doi.org/10.1017/s0954102011000794 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000794 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 24, issue 2, page 173-182 ISSN 0954-1020 1365-2079 journal-article 2011 crcambridgeupr https://doi.org/10.1017/s0954102011000794 2024-07-31T04:03:44Z Abstract A new magnetotelluric (MT) survey, along with new topographic parametric sonar (TOPAS) profiles and geological field observations, were carried out on the Deception Island active volcano. 3-D resistivity models reveal an ENE–WSW elongated conductor located at a depth between two and ten kilometres beneath the south-eastern part of the island, which we interpret as a combination of partial melt and hot fluids. The emplacement of the melt in the upper crust occurs along the ENE–WSW oriented, SSE dipping regional normal fault zone, which facilitates melt intrusion at shallower levels with volcanic eruptions and associated seismicity. Most of the onshore and offshore volcanic rocks are deformed by high-angle normal and sub-vertical faults with dominant dip-slip kinematics, distributed in sets roughly parallel and orthogonal to the major ENE–WSW regional tectonic trends. Faults development is related to perturbations of the regional stress field associated with magma chamber overpressure and deflation in a regional setting dominated by NW–SE to NNW–SSE extension. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Deception Island South Shetland Islands Cambridge University Press Antarctic Science 24 2 173 182 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract A new magnetotelluric (MT) survey, along with new topographic parametric sonar (TOPAS) profiles and geological field observations, were carried out on the Deception Island active volcano. 3-D resistivity models reveal an ENE–WSW elongated conductor located at a depth between two and ten kilometres beneath the south-eastern part of the island, which we interpret as a combination of partial melt and hot fluids. The emplacement of the melt in the upper crust occurs along the ENE–WSW oriented, SSE dipping regional normal fault zone, which facilitates melt intrusion at shallower levels with volcanic eruptions and associated seismicity. Most of the onshore and offshore volcanic rocks are deformed by high-angle normal and sub-vertical faults with dominant dip-slip kinematics, distributed in sets roughly parallel and orthogonal to the major ENE–WSW regional tectonic trends. Faults development is related to perturbations of the regional stress field associated with magma chamber overpressure and deflation in a regional setting dominated by NW–SE to NNW–SSE extension. |
format |
Article in Journal/Newspaper |
author |
Pedrera, Antonio Ruiz-Constán, Ana Heredia, Nemesio Galindo-Zaldívar, Jesús Bohoyo, Fernando Marín-Lechado, Carlos Ruano, Patricia Somoza, Luis |
spellingShingle |
Pedrera, Antonio Ruiz-Constán, Ana Heredia, Nemesio Galindo-Zaldívar, Jesús Bohoyo, Fernando Marín-Lechado, Carlos Ruano, Patricia Somoza, Luis The fracture system and the melt emplacement beneath the Deception Island active volcano, South Shetland Islands, Antarctica |
author_facet |
Pedrera, Antonio Ruiz-Constán, Ana Heredia, Nemesio Galindo-Zaldívar, Jesús Bohoyo, Fernando Marín-Lechado, Carlos Ruano, Patricia Somoza, Luis |
author_sort |
Pedrera, Antonio |
title |
The fracture system and the melt emplacement beneath the Deception Island active volcano, South Shetland Islands, Antarctica |
title_short |
The fracture system and the melt emplacement beneath the Deception Island active volcano, South Shetland Islands, Antarctica |
title_full |
The fracture system and the melt emplacement beneath the Deception Island active volcano, South Shetland Islands, Antarctica |
title_fullStr |
The fracture system and the melt emplacement beneath the Deception Island active volcano, South Shetland Islands, Antarctica |
title_full_unstemmed |
The fracture system and the melt emplacement beneath the Deception Island active volcano, South Shetland Islands, Antarctica |
title_sort |
fracture system and the melt emplacement beneath the deception island active volcano, south shetland islands, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2011 |
url |
http://dx.doi.org/10.1017/s0954102011000794 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000794 |
genre |
Antarc* Antarctic Science Antarctica Deception Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Science Antarctica Deception Island South Shetland Islands |
op_source |
Antarctic Science volume 24, issue 2, page 173-182 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102011000794 |
container_title |
Antarctic Science |
container_volume |
24 |
container_issue |
2 |
container_start_page |
173 |
op_container_end_page |
182 |
_version_ |
1810290153946611712 |