Compaction and Permeability Evolution of Tuffs From Krafla Volcano (Iceland)
International audience Abstract Pressure and stress perturbations associated with volcanic activity and geothermal production can modify the porosity and permeability of volcanic rock, influencing hydrothermal convection, the distribution of pore fluids and pressures, and the ease of magma outgassin...
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
2024
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Subjects: | |
Online Access: | https://hal.science/hal-04670787 https://hal.science/hal-04670787/document https://hal.science/hal-04670787/file/JGR%20Solid%20Earth%20-%202024%20-%20Heap%20-%20Compaction%20and%20Permeability%20Evolution%20of%20Tuffs%20From%20Krafla%20Volcano%20Iceland.pdf https://doi.org/10.1029/2024JB029067 |
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openpolar |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Heap, Michael Bayramov, Kamal Meyer, Gabriel Violay, Marie Reuschlé, Thierry Baud, Patrick Gilg, H. Albert Harnett, Claire Kushnir, Alexandra Lazari, Francesco Mortensen, Anette Compaction and Permeability Evolution of Tuffs From Krafla Volcano (Iceland) |
topic_facet |
[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience Abstract Pressure and stress perturbations associated with volcanic activity and geothermal production can modify the porosity and permeability of volcanic rock, influencing hydrothermal convection, the distribution of pore fluids and pressures, and the ease of magma outgassing. However, porosity and permeability data for volcanic rock as a function of pressure and stress are rare. We focus here on three porous tuffs from Krafla volcano (Iceland). Triaxial deformation experiments showed that, despite their very similar porosities, the mechanical behavior of the three tuffs differs. Tuffs with a greater abundance of phyllosilicates and zeolites require lower stresses for inelastic behavior. Under hydrostatic conditions, porosity and permeability decrease as a function of increasing effective pressure, with larger decreases measured at pressures above that required for cataclastic pore collapse. During differential loading in the ductile regime, permeability evolution depends on initial microstructure, particularly the initial void space tortuosity. Cataclastic pore collapse can disrupt the low‐tortuosity porosity structure of high‐permeability tuffs, reducing permeability, but does not particularly influence the already tortuous porosity structure of low‐permeability tuffs, for which permeability can even increase. Increases in permeability during compaction, not observed for other porous rocks, are interpreted as a result of a decrease in void space tortuosity as microcracks surrounding collapsed pores connect adjacent pores. Our data underscore the importance of initial microstructure on permeability evolution in volcanic rock. Our data can be used to better understand and model fluid flow at geothermal reservoirs and volcanoes, important to optimize geothermal exploitation and understand and mitigate volcanic hazards. |
author2 |
Institut Terre Environnement Strasbourg (ITES) École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) Ecole Polytechnique Fédérale de Lausanne (EPFL) French-Azerbaijani University (UFAZ) Technical University of Munich (TUM) University College Dublin Dublin (UCD) LANDSVIRKJUN ANR-20-SFRI-0012,STRAT'US,Façonner les talents en formation et en recherche à l'Université de Strasbourg(2020) ANR-10-IDEX-0002,UNISTRA,Par-delà les frontières, l'Université de Strasbourg(2010) ANR-21-CE49-0010,MYGALE,Modélisation phYsico-chimique des Gradients de l'ALtération hydrothermale: sentinelle de la dynamique d'instabilité gravitaire des volcans Explosifs(2021) European Project: 101118491,ROTTnROCK European Project: 757290,BEFINE |
format |
Article in Journal/Newspaper |
author |
Heap, Michael Bayramov, Kamal Meyer, Gabriel Violay, Marie Reuschlé, Thierry Baud, Patrick Gilg, H. Albert Harnett, Claire Kushnir, Alexandra Lazari, Francesco Mortensen, Anette |
author_facet |
Heap, Michael Bayramov, Kamal Meyer, Gabriel Violay, Marie Reuschlé, Thierry Baud, Patrick Gilg, H. Albert Harnett, Claire Kushnir, Alexandra Lazari, Francesco Mortensen, Anette |
author_sort |
Heap, Michael |
title |
Compaction and Permeability Evolution of Tuffs From Krafla Volcano (Iceland) |
title_short |
Compaction and Permeability Evolution of Tuffs From Krafla Volcano (Iceland) |
title_full |
Compaction and Permeability Evolution of Tuffs From Krafla Volcano (Iceland) |
title_fullStr |
Compaction and Permeability Evolution of Tuffs From Krafla Volcano (Iceland) |
title_full_unstemmed |
Compaction and Permeability Evolution of Tuffs From Krafla Volcano (Iceland) |
title_sort |
compaction and permeability evolution of tuffs from krafla volcano (iceland) |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04670787 https://hal.science/hal-04670787/document https://hal.science/hal-04670787/file/JGR%20Solid%20Earth%20-%202024%20-%20Heap%20-%20Compaction%20and%20Permeability%20Evolution%20of%20Tuffs%20From%20Krafla%20Volcano%20Iceland.pdf https://doi.org/10.1029/2024JB029067 |
long_lat |
ENVELOPE(-16.747,-16.747,65.713,65.713) |
geographic |
Krafla |
geographic_facet |
Krafla |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://hal.science/hal-04670787 Journal of Geophysical Research : Solid Earth, 2024, 129 (8), pp.e2024JB029067. ⟨10.1029/2024JB029067⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2024JB029067 info:eu-repo/grantAgreement//101118491/EU/Assessing the role of hydrothermal alteration on volcano morphology, instability, and unpredictable volcanic hazards/ROTTnROCK info:eu-repo/grantAgreement//757290/EU/European Research Council Starting Grant project 757290‐ BEFINE/BEFINE hal-04670787 https://hal.science/hal-04670787 https://hal.science/hal-04670787/document https://hal.science/hal-04670787/file/JGR%20Solid%20Earth%20-%202024%20-%20Heap%20-%20Compaction%20and%20Permeability%20Evolution%20of%20Tuffs%20From%20Krafla%20Volcano%20Iceland.pdf doi:10.1029/2024JB029067 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2024JB029067 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
129 |
container_issue |
8 |
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1809916344578080768 |
spelling |
ftinsu:oai:HAL:hal-04670787v1 2024-09-09T19:46:51+00:00 Compaction and Permeability Evolution of Tuffs From Krafla Volcano (Iceland) Heap, Michael Bayramov, Kamal Meyer, Gabriel Violay, Marie Reuschlé, Thierry Baud, Patrick Gilg, H. Albert Harnett, Claire Kushnir, Alexandra Lazari, Francesco Mortensen, Anette Institut Terre Environnement Strasbourg (ITES) École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) Ecole Polytechnique Fédérale de Lausanne (EPFL) French-Azerbaijani University (UFAZ) Technical University of Munich (TUM) University College Dublin Dublin (UCD) LANDSVIRKJUN ANR-20-SFRI-0012,STRAT'US,Façonner les talents en formation et en recherche à l'Université de Strasbourg(2020) ANR-10-IDEX-0002,UNISTRA,Par-delà les frontières, l'Université de Strasbourg(2010) ANR-21-CE49-0010,MYGALE,Modélisation phYsico-chimique des Gradients de l'ALtération hydrothermale: sentinelle de la dynamique d'instabilité gravitaire des volcans Explosifs(2021) European Project: 101118491,ROTTnROCK European Project: 757290,BEFINE 2024 https://hal.science/hal-04670787 https://hal.science/hal-04670787/document https://hal.science/hal-04670787/file/JGR%20Solid%20Earth%20-%202024%20-%20Heap%20-%20Compaction%20and%20Permeability%20Evolution%20of%20Tuffs%20From%20Krafla%20Volcano%20Iceland.pdf https://doi.org/10.1029/2024JB029067 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2024JB029067 info:eu-repo/grantAgreement//101118491/EU/Assessing the role of hydrothermal alteration on volcano morphology, instability, and unpredictable volcanic hazards/ROTTnROCK info:eu-repo/grantAgreement//757290/EU/European Research Council Starting Grant project 757290‐ BEFINE/BEFINE hal-04670787 https://hal.science/hal-04670787 https://hal.science/hal-04670787/document https://hal.science/hal-04670787/file/JGR%20Solid%20Earth%20-%202024%20-%20Heap%20-%20Compaction%20and%20Permeability%20Evolution%20of%20Tuffs%20From%20Krafla%20Volcano%20Iceland.pdf doi:10.1029/2024JB029067 info:eu-repo/semantics/OpenAccess ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://hal.science/hal-04670787 Journal of Geophysical Research : Solid Earth, 2024, 129 (8), pp.e2024JB029067. ⟨10.1029/2024JB029067⟩ [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2024 ftinsu https://doi.org/10.1029/2024JB029067 2024-08-14T23:40:02Z International audience Abstract Pressure and stress perturbations associated with volcanic activity and geothermal production can modify the porosity and permeability of volcanic rock, influencing hydrothermal convection, the distribution of pore fluids and pressures, and the ease of magma outgassing. However, porosity and permeability data for volcanic rock as a function of pressure and stress are rare. We focus here on three porous tuffs from Krafla volcano (Iceland). Triaxial deformation experiments showed that, despite their very similar porosities, the mechanical behavior of the three tuffs differs. Tuffs with a greater abundance of phyllosilicates and zeolites require lower stresses for inelastic behavior. Under hydrostatic conditions, porosity and permeability decrease as a function of increasing effective pressure, with larger decreases measured at pressures above that required for cataclastic pore collapse. During differential loading in the ductile regime, permeability evolution depends on initial microstructure, particularly the initial void space tortuosity. Cataclastic pore collapse can disrupt the low‐tortuosity porosity structure of high‐permeability tuffs, reducing permeability, but does not particularly influence the already tortuous porosity structure of low‐permeability tuffs, for which permeability can even increase. Increases in permeability during compaction, not observed for other porous rocks, are interpreted as a result of a decrease in void space tortuosity as microcracks surrounding collapsed pores connect adjacent pores. Our data underscore the importance of initial microstructure on permeability evolution in volcanic rock. Our data can be used to better understand and model fluid flow at geothermal reservoirs and volcanoes, important to optimize geothermal exploitation and understand and mitigate volcanic hazards. Article in Journal/Newspaper Iceland Institut national des sciences de l'Univers: HAL-INSU Krafla ENVELOPE(-16.747,-16.747,65.713,65.713) Journal of Geophysical Research: Solid Earth 129 8 |