Magma ascent and eruption forecasting at Deception Island volcano (Antarctica) evidenced by dD and d18O variations
EGU2020: Sharing Geoscience Online, 4-8 may 2020 Geochemistry of volatiles in active volcanoes provides insights into the magmatic processes and evolution at depth, such as magma evolution and degassing, which can be implemented into volcanic hazards assessment. Deception Island is one of the most a...
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ftcsic:oai:digital.csic.es:10261/214035 2024-02-11T09:58:51+01:00 Magma ascent and eruption forecasting at Deception Island volcano (Antarctica) evidenced by dD and d18O variations Álvarez-Valero, A. M. Aulinas, M. Geyer, Adelina Gisbert, Guillem Kereszturi, G. Núñez-Guerrero, E. Polo-Sánchez, A. Sumino, H. 2020-05-04 http://hdl.handle.net/10261/214035 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 https://meetingorganizer.copernicus.org/EGU2020/EGU2020-12700.html Sí http://hdl.handle.net/10261/214035 open Volcanology Magma Antarctica póster de congreso http://purl.org/coar/resource_type/c_6670 2020 ftcsic 2024-01-16T10:55:09Z EGU2020: Sharing Geoscience Online, 4-8 may 2020 Geochemistry of volatiles in active volcanoes provides insights into the magmatic processes and evolution at depth, such as magma evolution and degassing, which can be implemented into volcanic hazards assessment. Deception Island is one of the most active volcanoes in Antarctica, with more than twenty explosive eruptions documented over the past two centuries. Hydrogen and oxygen isotopic variations in the volatiles trapped in the Deception Island rocks (glass and melt inclusions in phenocrysts) provide essential information on the mechanisms controlling the eruptive history in this volcanic suite. Thus, understanding the petrological and related isotopic variations in the island, has the potential to foresee the possible occurrence and its main eruptive features of a future eruption. Information from hydrogen and oxygen stable isotopes combined with detailed petrologic data reveal in Deception Island (i) fast ascent and quenching of most magmas, preserving pre-eruptive magmatic signal of water contents and isotopic ratios, with local modification by rehydration due to glass exposition to seawater, meteoric and fumarolic waters; (ii) a plumbing system(s) currently dominated by closed-system degassing leading to explosive eruptions; (iii) control on the interactions of ascending magmas with the surface waters producing hydrovolcanic activity throughout the two main fault systems in Deception Island. These results can be considered in further studies of volcanic monitoring to improve the capability to interpret geophysical data and signals recorded during volcanic unrest episodes, and hence, forecast volcanic eruptions and related hazards. This research was partially funded by the following projects: POSVOLDEC (CTM2016¿79617¿P) (AEI/FEDER¿UE), VOLGASDEC (PGC2018-095693-B-I00) (AEI/FEDER¿UE) and Programa Propio Ib-2019 (USAL). This research is also part of POLARCSIC activities. This research was partially funded by the following projects: POSVOLDEC ... Still Image Antarc* Antarctica Deception Island Digital.CSIC (Spanish National Research Council) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Volcanology Magma Antarctica |
spellingShingle |
Volcanology Magma Antarctica Álvarez-Valero, A. M. Aulinas, M. Geyer, Adelina Gisbert, Guillem Kereszturi, G. Núñez-Guerrero, E. Polo-Sánchez, A. Sumino, H. Magma ascent and eruption forecasting at Deception Island volcano (Antarctica) evidenced by dD and d18O variations |
topic_facet |
Volcanology Magma Antarctica |
description |
EGU2020: Sharing Geoscience Online, 4-8 may 2020 Geochemistry of volatiles in active volcanoes provides insights into the magmatic processes and evolution at depth, such as magma evolution and degassing, which can be implemented into volcanic hazards assessment. Deception Island is one of the most active volcanoes in Antarctica, with more than twenty explosive eruptions documented over the past two centuries. Hydrogen and oxygen isotopic variations in the volatiles trapped in the Deception Island rocks (glass and melt inclusions in phenocrysts) provide essential information on the mechanisms controlling the eruptive history in this volcanic suite. Thus, understanding the petrological and related isotopic variations in the island, has the potential to foresee the possible occurrence and its main eruptive features of a future eruption. Information from hydrogen and oxygen stable isotopes combined with detailed petrologic data reveal in Deception Island (i) fast ascent and quenching of most magmas, preserving pre-eruptive magmatic signal of water contents and isotopic ratios, with local modification by rehydration due to glass exposition to seawater, meteoric and fumarolic waters; (ii) a plumbing system(s) currently dominated by closed-system degassing leading to explosive eruptions; (iii) control on the interactions of ascending magmas with the surface waters producing hydrovolcanic activity throughout the two main fault systems in Deception Island. These results can be considered in further studies of volcanic monitoring to improve the capability to interpret geophysical data and signals recorded during volcanic unrest episodes, and hence, forecast volcanic eruptions and related hazards. This research was partially funded by the following projects: POSVOLDEC (CTM2016¿79617¿P) (AEI/FEDER¿UE), VOLGASDEC (PGC2018-095693-B-I00) (AEI/FEDER¿UE) and Programa Propio Ib-2019 (USAL). This research is also part of POLARCSIC activities. This research was partially funded by the following projects: POSVOLDEC ... |
format |
Still Image |
author |
Álvarez-Valero, A. M. Aulinas, M. Geyer, Adelina Gisbert, Guillem Kereszturi, G. Núñez-Guerrero, E. Polo-Sánchez, A. Sumino, H. |
author_facet |
Álvarez-Valero, A. M. Aulinas, M. Geyer, Adelina Gisbert, Guillem Kereszturi, G. Núñez-Guerrero, E. Polo-Sánchez, A. Sumino, H. |
author_sort |
Álvarez-Valero, A. M. |
title |
Magma ascent and eruption forecasting at Deception Island volcano (Antarctica) evidenced by dD and d18O variations |
title_short |
Magma ascent and eruption forecasting at Deception Island volcano (Antarctica) evidenced by dD and d18O variations |
title_full |
Magma ascent and eruption forecasting at Deception Island volcano (Antarctica) evidenced by dD and d18O variations |
title_fullStr |
Magma ascent and eruption forecasting at Deception Island volcano (Antarctica) evidenced by dD and d18O variations |
title_full_unstemmed |
Magma ascent and eruption forecasting at Deception Island volcano (Antarctica) evidenced by dD and d18O variations |
title_sort |
magma ascent and eruption forecasting at deception island volcano (antarctica) evidenced by dd and d18o variations |
publishDate |
2020 |
url |
http://hdl.handle.net/10261/214035 |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
Deception Island |
geographic_facet |
Deception Island |
genre |
Antarc* Antarctica Deception Island |
genre_facet |
Antarc* Antarctica Deception Island |
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 https://meetingorganizer.copernicus.org/EGU2020/EGU2020-12700.html Sí http://hdl.handle.net/10261/214035 |
op_rights |
open |
_version_ |
1790594637925187584 |