Magma storage beneath Grímsvötn volcano, Iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass
Co-auteur étranger International audience Basalt eruptions at Grímsvötn volcano, Iceland, are generally of low intensity; however, occasionally, an order of magnitude larger eruptions occur. In order to discuss the reasons for this difference, the degassing budget of S and Cl and crystallization con...
Published in: | Journal of Geophysical Research: Solid Earth |
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Online Access: | https://uca.hal.science/hal-01713309 https://uca.hal.science/hal-01713309/document https://uca.hal.science/hal-01713309/file/Haddadi_et_al-2017-Journal_of_Geophysical_ResearchA_Solid_Earth.pdf https://doi.org/10.1002/2017JB014067 |
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ftanrparis:oai:HAL:hal-01713309v1 2024-06-23T07:53:57+00:00 Magma storage beneath Grímsvötn volcano, Iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass Haddadi, B. Sigmarsson, O. Larsen, G. Laboratoire Magmas et Volcans (LMV) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) Institute of Earth Sciences Reykjavik University of Iceland Reykjavik ANR-10-LABX-0006,CLERVOLC,Clermont-Ferrand centre for research on volcanism(2010) ANR-16-IDEX-0001,CAP 20-25,CAP 20-25(2016) 2017-09 https://uca.hal.science/hal-01713309 https://uca.hal.science/hal-01713309/document https://uca.hal.science/hal-01713309/file/Haddadi_et_al-2017-Journal_of_Geophysical_ResearchA_Solid_Earth.pdf https://doi.org/10.1002/2017JB014067 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2017JB014067 hal-01713309 https://uca.hal.science/hal-01713309 https://uca.hal.science/hal-01713309/document https://uca.hal.science/hal-01713309/file/Haddadi_et_al-2017-Journal_of_Geophysical_ResearchA_Solid_Earth.pdf doi:10.1002/2017JB014067 info:eu-repo/semantics/OpenAccess ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://uca.hal.science/hal-01713309 Journal of Geophysical Research : Solid Earth, 2017, 122 (9), pp.6984 - 6997. ⟨10.1002/2017JB014067⟩ [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2017 ftanrparis https://doi.org/10.1002/2017JB014067 2024-06-12T23:49:40Z Co-auteur étranger International audience Basalt eruptions at Grímsvötn volcano, Iceland, are generally of low intensity; however, occasionally, an order of magnitude larger eruptions occur. In order to discuss the reasons for this difference, the degassing budget of S and Cl and crystallization conditions of the eruptive magma were determined from volatile concentration measured in melt inclusion (MI) and groundmass glass and thermobarometry, respectively. Tephra of two of the largest historical eruptions (2011 and 1873) and two much smaller eruptions (2004 and 1823) were investigated. Sulfur and Cl concentrations are higher in groundmass glass of the smaller eruptions due to incomplete outgassing caused by melt quenching in contact with glacial water. Sulfur concentration and degassing budget correlate with erupted magma volumes. Higher volatile concentrations of MI from the larger eruptions reflect important recharge of gas-rich magma from depth. The recharge causes a high-magnitude eruption followed by increased eruption frequency over the following decades. Pressure and temperature estimates of crystallization are obtained through equilibrium clinopyroxene-glass pairs, where crystals adjacent to, and in textural equilibrium with, both groundmass glass and that of MI were measured. An average crystallization pressure of 4 ± 1 kbar corresponding to approximately 15 ± 5 km depth was obtained together with a considerable temperature range, 065–1175°C. Similar crystallization depths are obtained for the basalt of the 2014 –2015 Bárðarbunga rifting event and to a low resistivity layer revealed by magnetotelluric surveys. Therefore, an important magma storage depth is inferred at lower crustal depth above the center of the Iceland mantle plume Article in Journal/Newspaper Iceland Portail HAL-ANR (Agence Nationale de la Recherche) Journal of Geophysical Research: Solid Earth 122 9 6984 6997 |
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Open Polar |
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Portail HAL-ANR (Agence Nationale de la Recherche) |
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ftanrparis |
language |
English |
topic |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
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[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Haddadi, B. Sigmarsson, O. Larsen, G. Magma storage beneath Grímsvötn volcano, Iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass |
topic_facet |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
Co-auteur étranger International audience Basalt eruptions at Grímsvötn volcano, Iceland, are generally of low intensity; however, occasionally, an order of magnitude larger eruptions occur. In order to discuss the reasons for this difference, the degassing budget of S and Cl and crystallization conditions of the eruptive magma were determined from volatile concentration measured in melt inclusion (MI) and groundmass glass and thermobarometry, respectively. Tephra of two of the largest historical eruptions (2011 and 1873) and two much smaller eruptions (2004 and 1823) were investigated. Sulfur and Cl concentrations are higher in groundmass glass of the smaller eruptions due to incomplete outgassing caused by melt quenching in contact with glacial water. Sulfur concentration and degassing budget correlate with erupted magma volumes. Higher volatile concentrations of MI from the larger eruptions reflect important recharge of gas-rich magma from depth. The recharge causes a high-magnitude eruption followed by increased eruption frequency over the following decades. Pressure and temperature estimates of crystallization are obtained through equilibrium clinopyroxene-glass pairs, where crystals adjacent to, and in textural equilibrium with, both groundmass glass and that of MI were measured. An average crystallization pressure of 4 ± 1 kbar corresponding to approximately 15 ± 5 km depth was obtained together with a considerable temperature range, 065–1175°C. Similar crystallization depths are obtained for the basalt of the 2014 –2015 Bárðarbunga rifting event and to a low resistivity layer revealed by magnetotelluric surveys. Therefore, an important magma storage depth is inferred at lower crustal depth above the center of the Iceland mantle plume |
author2 |
Laboratoire Magmas et Volcans (LMV) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) Institute of Earth Sciences Reykjavik University of Iceland Reykjavik ANR-10-LABX-0006,CLERVOLC,Clermont-Ferrand centre for research on volcanism(2010) ANR-16-IDEX-0001,CAP 20-25,CAP 20-25(2016) |
format |
Article in Journal/Newspaper |
author |
Haddadi, B. Sigmarsson, O. Larsen, G. |
author_facet |
Haddadi, B. Sigmarsson, O. Larsen, G. |
author_sort |
Haddadi, B. |
title |
Magma storage beneath Grímsvötn volcano, Iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass |
title_short |
Magma storage beneath Grímsvötn volcano, Iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass |
title_full |
Magma storage beneath Grímsvötn volcano, Iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass |
title_fullStr |
Magma storage beneath Grímsvötn volcano, Iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass |
title_full_unstemmed |
Magma storage beneath Grímsvötn volcano, Iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass |
title_sort |
magma storage beneath grímsvötn volcano, iceland, constrained by clinopyroxene-melt thermobarometry and volatiles in melt inclusions and groundmass glass |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://uca.hal.science/hal-01713309 https://uca.hal.science/hal-01713309/document https://uca.hal.science/hal-01713309/file/Haddadi_et_al-2017-Journal_of_Geophysical_ResearchA_Solid_Earth.pdf https://doi.org/10.1002/2017JB014067 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://uca.hal.science/hal-01713309 Journal of Geophysical Research : Solid Earth, 2017, 122 (9), pp.6984 - 6997. ⟨10.1002/2017JB014067⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017JB014067 hal-01713309 https://uca.hal.science/hal-01713309 https://uca.hal.science/hal-01713309/document https://uca.hal.science/hal-01713309/file/Haddadi_et_al-2017-Journal_of_Geophysical_ResearchA_Solid_Earth.pdf doi:10.1002/2017JB014067 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2017JB014067 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
122 |
container_issue |
9 |
container_start_page |
6984 |
op_container_end_page |
6997 |
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1802645864184807424 |