Characterization of the Outer Coast Tuff Formation- A way to unravelling the magmatic processes preceding and triggering Deception Island's caldera - forming eruption (Antarctica)
vEGU21: Gather Online | 19–30 April 2021 Deception Island (South Shetland Islands), discovered in 1820, is one of the most active volcanoes in Antarctica with more than 20 eruptions (including the historic eruptions of 1967, 1969 and 1970) and three documented volcanic unrest events (1992, 1999 and...
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ftcsic:oai:digital.csic.es:10261/241316 2024-02-11T09:56:43+01:00 Characterization of the Outer Coast Tuff Formation- A way to unravelling the magmatic processes preceding and triggering Deception Island's caldera - forming eruption (Antarctica) Vilanova, O. Aulinas, M. Geyer, Adelina Martí Molist, Joan Álvarez-Valero, A. M. Albert, Helena Gisbert, Guillem Ministerio de Economía y Competitividad (España) Universidad de Barcelona 2021-04-19 http://hdl.handle.net/10261/241316 https://doi.org/10.5194/egusphere-egu21-2840 https://doi.org/10.13039/501100005774 https://doi.org/10.13039/501100003329 unknown #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2016-79617-P info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/PGC2018-095693-B-I00 Publisher's version http://dx.doi.org/10.5194/egusphere-egu21-2840 Sí doi:10.5194/egusphere-egu21-2840 http://hdl.handle.net/10261/241316 http://dx.doi.org/10.13039/501100005774 http://dx.doi.org/10.13039/501100003329 open Antarctica Deception Island volcanology POLARCSIC comunicación de congreso http://purl.org/coar/resource_type/c_5794 2021 ftcsic https://doi.org/10.5194/egusphere-egu21-284010.13039/50110000577410.13039/501100003329 2024-01-16T11:08:53Z vEGU21: Gather Online | 19–30 April 2021 Deception Island (South Shetland Islands), discovered in 1820, is one of the most active volcanoes in Antarctica with more than 20 eruptions (including the historic eruptions of 1967, 1969 and 1970) and three documented volcanic unrest events (1992, 1999 and 2014-15) over the past two centuries. Deception Island currently hosts two scientific bases, which operate every year during the Austral summer, and is also one of the most popular tourist destinations in Antarctica. The island is a composite volcano with a centrally located caldera of 8.5 x 10 km dated at 3,980 ± 125 yr. BP. During the caldera-forming event, between 30 and 60 km3 (Dense Rock Equivalent-DRE) of magma, erupted in the form of dense basaltic-andesitic pyroclastic density current deposits. During the last decades, Deception Island has been intensively investigated but some aspects regarding the magmatic processes associated with the formation of its caldera collapse are still under research and debate. For instance, characterizing the magmatic conditions and processes that triggered the huge explosive event is crucial to understand the past (and in turn the future) magmatic and volcanic evolution of the island. This study is performing an exhaustive petrological and geochemical characterization (mineral and juvenile glass geochemistry) of the Outer Coast Tuff Formation (OCTF), the main syn-caldera depositional unit. The preliminary results confirm the existence of two different magmas coexisting, and interacting, prior to (and during) the caldera-forming event. Mineral analyses also allow shedding further light on the magmatic processes occurring in the magma system before the eruption (e.g. fractional crystallization, magma mixing). The presence of alteration minerals such as palagonite and zeolites indicate different magma-water interaction mechanisms occurred during the syn- and post-eruptive episodes in the island. This research is part of POLARCSIC and PTIVolcan research initiatives. This ... Conference Object Antarc* Antarctica Deception Island South Shetland Islands Digital.CSIC (Spanish National Research Council) Austral Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) South Shetland Islands |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Antarctica Deception Island volcanology POLARCSIC |
spellingShingle |
Antarctica Deception Island volcanology POLARCSIC Vilanova, O. Aulinas, M. Geyer, Adelina Martí Molist, Joan Álvarez-Valero, A. M. Albert, Helena Gisbert, Guillem Characterization of the Outer Coast Tuff Formation- A way to unravelling the magmatic processes preceding and triggering Deception Island's caldera - forming eruption (Antarctica) |
topic_facet |
Antarctica Deception Island volcanology POLARCSIC |
description |
vEGU21: Gather Online | 19–30 April 2021 Deception Island (South Shetland Islands), discovered in 1820, is one of the most active volcanoes in Antarctica with more than 20 eruptions (including the historic eruptions of 1967, 1969 and 1970) and three documented volcanic unrest events (1992, 1999 and 2014-15) over the past two centuries. Deception Island currently hosts two scientific bases, which operate every year during the Austral summer, and is also one of the most popular tourist destinations in Antarctica. The island is a composite volcano with a centrally located caldera of 8.5 x 10 km dated at 3,980 ± 125 yr. BP. During the caldera-forming event, between 30 and 60 km3 (Dense Rock Equivalent-DRE) of magma, erupted in the form of dense basaltic-andesitic pyroclastic density current deposits. During the last decades, Deception Island has been intensively investigated but some aspects regarding the magmatic processes associated with the formation of its caldera collapse are still under research and debate. For instance, characterizing the magmatic conditions and processes that triggered the huge explosive event is crucial to understand the past (and in turn the future) magmatic and volcanic evolution of the island. This study is performing an exhaustive petrological and geochemical characterization (mineral and juvenile glass geochemistry) of the Outer Coast Tuff Formation (OCTF), the main syn-caldera depositional unit. The preliminary results confirm the existence of two different magmas coexisting, and interacting, prior to (and during) the caldera-forming event. Mineral analyses also allow shedding further light on the magmatic processes occurring in the magma system before the eruption (e.g. fractional crystallization, magma mixing). The presence of alteration minerals such as palagonite and zeolites indicate different magma-water interaction mechanisms occurred during the syn- and post-eruptive episodes in the island. This research is part of POLARCSIC and PTIVolcan research initiatives. This ... |
author2 |
Ministerio de Economía y Competitividad (España) Universidad de Barcelona |
format |
Conference Object |
author |
Vilanova, O. Aulinas, M. Geyer, Adelina Martí Molist, Joan Álvarez-Valero, A. M. Albert, Helena Gisbert, Guillem |
author_facet |
Vilanova, O. Aulinas, M. Geyer, Adelina Martí Molist, Joan Álvarez-Valero, A. M. Albert, Helena Gisbert, Guillem |
author_sort |
Vilanova, O. |
title |
Characterization of the Outer Coast Tuff Formation- A way to unravelling the magmatic processes preceding and triggering Deception Island's caldera - forming eruption (Antarctica) |
title_short |
Characterization of the Outer Coast Tuff Formation- A way to unravelling the magmatic processes preceding and triggering Deception Island's caldera - forming eruption (Antarctica) |
title_full |
Characterization of the Outer Coast Tuff Formation- A way to unravelling the magmatic processes preceding and triggering Deception Island's caldera - forming eruption (Antarctica) |
title_fullStr |
Characterization of the Outer Coast Tuff Formation- A way to unravelling the magmatic processes preceding and triggering Deception Island's caldera - forming eruption (Antarctica) |
title_full_unstemmed |
Characterization of the Outer Coast Tuff Formation- A way to unravelling the magmatic processes preceding and triggering Deception Island's caldera - forming eruption (Antarctica) |
title_sort |
characterization of the outer coast tuff formation- a way to unravelling the magmatic processes preceding and triggering deception island's caldera - forming eruption (antarctica) |
publishDate |
2021 |
url |
http://hdl.handle.net/10261/241316 https://doi.org/10.5194/egusphere-egu21-2840 https://doi.org/10.13039/501100005774 https://doi.org/10.13039/501100003329 |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
Austral Deception Island South Shetland Islands |
geographic_facet |
Austral Deception Island South Shetland Islands |
genre |
Antarc* Antarctica Deception Island South Shetland Islands |
genre_facet |
Antarc* Antarctica Deception Island South Shetland Islands |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2016-79617-P info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/PGC2018-095693-B-I00 Publisher's version http://dx.doi.org/10.5194/egusphere-egu21-2840 Sí doi:10.5194/egusphere-egu21-2840 http://hdl.handle.net/10261/241316 http://dx.doi.org/10.13039/501100005774 http://dx.doi.org/10.13039/501100003329 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/egusphere-egu21-284010.13039/50110000577410.13039/501100003329 |
_version_ |
1790605358193967104 |