A two-magma chamber model as a source of deformation at Grimsvötn Volcano, Iceland
International audience Grimsvötn Volcano is the most active volcano in Iceland, and its last three eruptions were in 1998, 2004, and 2011. Here we analyze the displacement around Grimsvötn during these last three eruptive cycles using 10 GPS stations. The observed displacements in this region genera...
Published in: | Journal of Geophysical Research: Solid Earth |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2014
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Online Access: | https://hal.science/hal-01009140 https://hal.science/hal-01009140/document https://hal.science/hal-01009140/file/reverso2014.pdf https://doi.org/10.1002/2013JB010569 |
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[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes [SDE]Environmental Sciences |
spellingShingle |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes [SDE]Environmental Sciences Reverso, Thomas Vandemeulebrouck, Jean Jouanne, François Pinel, Virginie Villemin, Thierry Sturkell, Erik Bascou, Pascale A two-magma chamber model as a source of deformation at Grimsvötn Volcano, Iceland |
topic_facet |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes [SDE]Environmental Sciences |
description |
International audience Grimsvötn Volcano is the most active volcano in Iceland, and its last three eruptions were in 1998, 2004, and 2011. Here we analyze the displacement around Grimsvötn during these last three eruptive cycles using 10 GPS stations. The observed displacements in this region generally contain a linear component of tectonic and glacio-isostatic origin, in agreement with the previously estimated values of plate motions and vertical rebound. Larger amplitude deformation observed close to Grimsvötn at the GFUM continuous GPS station clearly reflects a major volcanic contribution superimposed on a tectonic component. We estimate and subtract the tectonic trend at this station using regional observed displacement. The direction and pattern of the residual volcanic displacement (for coeruptive and intereruptive periods) are consistent for all three of these eruptive cycles. The post eruptive inflation is characterized by an exponential trend, followed by a linear trend. In this study, we explain this temporal behavior using a new analytic model that has two connected magma chambers surrounded by an elastic medium and fed by a constant basal magma inflow. During the early post eruptive phase, pressure readjustment occurs between the two reservoirs, with replenishment of the shallow chamber from the deep chamber. Afterward, due to the constant inflow of magma into the deep reservoir, the pressurization of the system produces linear uplift. A large deep reservoir favors magma storage rather than surface emission. Based on displacement measured at GFUM station, we estimate an upper limit for the radius of the deep reservoir of ∼10 km. |
author2 |
Institut des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Géophysique des volcans & géothermie Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Mécanique des failles Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Department of Earth Sciences Gothenburg Göteborgs Universitet = University of Gothenburg (GU) |
format |
Article in Journal/Newspaper |
author |
Reverso, Thomas Vandemeulebrouck, Jean Jouanne, François Pinel, Virginie Villemin, Thierry Sturkell, Erik Bascou, Pascale |
author_facet |
Reverso, Thomas Vandemeulebrouck, Jean Jouanne, François Pinel, Virginie Villemin, Thierry Sturkell, Erik Bascou, Pascale |
author_sort |
Reverso, Thomas |
title |
A two-magma chamber model as a source of deformation at Grimsvötn Volcano, Iceland |
title_short |
A two-magma chamber model as a source of deformation at Grimsvötn Volcano, Iceland |
title_full |
A two-magma chamber model as a source of deformation at Grimsvötn Volcano, Iceland |
title_fullStr |
A two-magma chamber model as a source of deformation at Grimsvötn Volcano, Iceland |
title_full_unstemmed |
A two-magma chamber model as a source of deformation at Grimsvötn Volcano, Iceland |
title_sort |
two-magma chamber model as a source of deformation at grimsvötn volcano, iceland |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-01009140 https://hal.science/hal-01009140/document https://hal.science/hal-01009140/file/reverso2014.pdf https://doi.org/10.1002/2013JB010569 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-01009140 Journal of Geophysical Research, 2014, 119, pp.4666-4683. ⟨10.1002/2013JB010569⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2013JB010569 hal-01009140 https://hal.science/hal-01009140 https://hal.science/hal-01009140/document https://hal.science/hal-01009140/file/reverso2014.pdf doi:10.1002/2013JB010569 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2013JB010569 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
119 |
container_issue |
6 |
container_start_page |
4666 |
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4683 |
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spelling |
ftunivsavoie:oai:HAL:hal-01009140v1 2024-04-28T08:25:45+00:00 A two-magma chamber model as a source of deformation at Grimsvötn Volcano, Iceland Reverso, Thomas Vandemeulebrouck, Jean Jouanne, François Pinel, Virginie Villemin, Thierry Sturkell, Erik Bascou, Pascale Institut des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Géophysique des volcans & géothermie Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Mécanique des failles Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Department of Earth Sciences Gothenburg Göteborgs Universitet = University of Gothenburg (GU) 2014 https://hal.science/hal-01009140 https://hal.science/hal-01009140/document https://hal.science/hal-01009140/file/reverso2014.pdf https://doi.org/10.1002/2013JB010569 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2013JB010569 hal-01009140 https://hal.science/hal-01009140 https://hal.science/hal-01009140/document https://hal.science/hal-01009140/file/reverso2014.pdf doi:10.1002/2013JB010569 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-01009140 Journal of Geophysical Research, 2014, 119, pp.4666-4683. ⟨10.1002/2013JB010569⟩ [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2014 ftunivsavoie https://doi.org/10.1002/2013JB010569 2024-04-11T01:03:32Z International audience Grimsvötn Volcano is the most active volcano in Iceland, and its last three eruptions were in 1998, 2004, and 2011. Here we analyze the displacement around Grimsvötn during these last three eruptive cycles using 10 GPS stations. The observed displacements in this region generally contain a linear component of tectonic and glacio-isostatic origin, in agreement with the previously estimated values of plate motions and vertical rebound. Larger amplitude deformation observed close to Grimsvötn at the GFUM continuous GPS station clearly reflects a major volcanic contribution superimposed on a tectonic component. We estimate and subtract the tectonic trend at this station using regional observed displacement. The direction and pattern of the residual volcanic displacement (for coeruptive and intereruptive periods) are consistent for all three of these eruptive cycles. The post eruptive inflation is characterized by an exponential trend, followed by a linear trend. In this study, we explain this temporal behavior using a new analytic model that has two connected magma chambers surrounded by an elastic medium and fed by a constant basal magma inflow. During the early post eruptive phase, pressure readjustment occurs between the two reservoirs, with replenishment of the shallow chamber from the deep chamber. Afterward, due to the constant inflow of magma into the deep reservoir, the pressurization of the system produces linear uplift. A large deep reservoir favors magma storage rather than surface emission. Based on displacement measured at GFUM station, we estimate an upper limit for the radius of the deep reservoir of ∼10 km. Article in Journal/Newspaper Iceland Université Savoie Mont Blanc: HAL Journal of Geophysical Research: Solid Earth 119 6 4666 4683 |