Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands
Abstract Deception Island is the largest volcano in the actively extending Bransfield Basin, a marginal basin situated behind the extinct South Shetland Islands arc. Deception Island has been well studied but its submerged flanks have not. A multibeam bathymetry survey was conducted around the islan...
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crcambridgeupr:10.1017/s0954102008001673 2024-09-15T17:49:05+00:00 Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands Barclay, A.H. Wilcock, W.S.D. Ibáñez, J.M. 2008 http://dx.doi.org/10.1017/s0954102008001673 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008001673 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 21, issue 2, page 153-167 ISSN 0954-1020 1365-2079 journal-article 2008 crcambridgeupr https://doi.org/10.1017/s0954102008001673 2024-07-31T04:04:30Z Abstract Deception Island is the largest volcano in the actively extending Bransfield Basin, a marginal basin situated behind the extinct South Shetland Islands arc. Deception Island has been well studied but its submerged flanks have not. A multibeam bathymetry survey was conducted around the island in 2005. Data from the flooded caldera show no evidence for recent localized resurgence. The gently-sloped bottom of the caldera basin is consistent with either a broad zone of resurgence on its east side associated with trap door deformation or with higher rates of sediment supply from the east side of the island. Around the island, numerous tectonic and volcanic features on the volcano's east and west flanks are nearly all aligned with the regional strike (~060°) of the Bransfield rift and there is very little evidence for the other fault populations that have been identified on the island. We infer that models that link the ongoing tectonic development of Deception Island to complex regional tectonics are less likely than models in which the dominant regional extension in Bransfield Strait is modulated by the local effects of caldera collapse and possibly a small right-lateral transfer zone offsetting the primary extension axes in the Central and Western Bransfield Basins. Article in Journal/Newspaper Antarctic Science Bransfield Strait Deception Island South Shetland Islands Cambridge University Press Antarctic Science 21 2 153 167 |
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Cambridge University Press |
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English |
description |
Abstract Deception Island is the largest volcano in the actively extending Bransfield Basin, a marginal basin situated behind the extinct South Shetland Islands arc. Deception Island has been well studied but its submerged flanks have not. A multibeam bathymetry survey was conducted around the island in 2005. Data from the flooded caldera show no evidence for recent localized resurgence. The gently-sloped bottom of the caldera basin is consistent with either a broad zone of resurgence on its east side associated with trap door deformation or with higher rates of sediment supply from the east side of the island. Around the island, numerous tectonic and volcanic features on the volcano's east and west flanks are nearly all aligned with the regional strike (~060°) of the Bransfield rift and there is very little evidence for the other fault populations that have been identified on the island. We infer that models that link the ongoing tectonic development of Deception Island to complex regional tectonics are less likely than models in which the dominant regional extension in Bransfield Strait is modulated by the local effects of caldera collapse and possibly a small right-lateral transfer zone offsetting the primary extension axes in the Central and Western Bransfield Basins. |
format |
Article in Journal/Newspaper |
author |
Barclay, A.H. Wilcock, W.S.D. Ibáñez, J.M. |
spellingShingle |
Barclay, A.H. Wilcock, W.S.D. Ibáñez, J.M. Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands |
author_facet |
Barclay, A.H. Wilcock, W.S.D. Ibáñez, J.M. |
author_sort |
Barclay, A.H. |
title |
Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands |
title_short |
Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands |
title_full |
Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands |
title_fullStr |
Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands |
title_full_unstemmed |
Bathymetric constraints on the tectonic and volcanic evolution of Deception Island Volcano, South Shetland Islands |
title_sort |
bathymetric constraints on the tectonic and volcanic evolution of deception island volcano, south shetland islands |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1017/s0954102008001673 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008001673 |
genre |
Antarctic Science Bransfield Strait Deception Island South Shetland Islands |
genre_facet |
Antarctic Science Bransfield Strait Deception Island South Shetland Islands |
op_source |
Antarctic Science volume 21, issue 2, page 153-167 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102008001673 |
container_title |
Antarctic Science |
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21 |
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2 |
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153 |
op_container_end_page |
167 |
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1810290795548246016 |