DataSheet1_Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland.pdf
Non-eruptive uplift and subsidence episodes remain a challenge for monitoring and hazard assessments in active volcanic systems worldwide. Sources of such deformation may relate to processes such as magma inflow and outflow, motion and phase changes of hydrothermal fluids or magma volatiles, heat tr...
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Online Access: | https://doi.org/10.3389/feart.2021.725109.s001 |
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ftsmithonian:oai:figshare.com:article/16782823 2023-05-15T16:53:06+02:00 DataSheet1_Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland.pdf Cécile Ducrocq (11546275) Halldór Geirsson (11546278) Thóra Árnadóttir (11546281) Daniel Juncu (11546284) Vincent Drouin (11546287) Gunnar Gunnarsson (169400) Bjarni R. Kristjánsson (11546290) Freysteinn Sigmundsson (8263029) Sigrún Hreinsdóttir (11546293) Sigrún Tómasdóttir (11546296) Hanna Blanck (11546299) 2021-10-11T10:29:48Z https://doi.org/10.3389/feart.2021.725109.s001 unknown https://figshare.com/articles/dataset/DataSheet1_Inflation-Deflation_Episodes_in_the_Hengill_and_Hr_mundartindur_Volcanic_Complexes_SW_Iceland_pdf/16782823 doi:10.3389/feart.2021.725109.s001 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change volcano deformation satellite geodesy joint inversion volcano monitoring time-series analysis Dataset 2021 ftsmithonian https://doi.org/10.3389/feart.2021.725109.s001 2021-12-20T00:31:57Z Non-eruptive uplift and subsidence episodes remain a challenge for monitoring and hazard assessments in active volcanic systems worldwide. Sources of such deformation may relate to processes such as magma inflow and outflow, motion and phase changes of hydrothermal fluids or magma volatiles, heat transfer from magmatic bodies and heat-mining from geothermal extraction. The Hengill area, in southwest Iceland, hosts two active volcanic systems, Hengill and Hrómundartindur, and two high-temperature geothermal power plants, Hellisheiði and Nesjavellir. Using a combination of geodetic data sets (GNSS and InSAR; Global Navigation Satellite Systems and Interferometry Synthetic Aperture Radar, respectively) and a non-linear inversion scheme to estimate the optimal analytical model parameters, we investigate the ground deformation between 2017–2018. Due to other ongoing deformation processes in the area, such as plate motion, subsidence in the two geothermal production fields, and deep-seated source of contraction since 2006, we estimate 2017–2018 difference velocities by subtracting background deformation, determined from data spanning 2015–2017 (InSAR) or 2009–2017 (GNSS). This method highlights changes in ground deformation observed in 2017–2018 compared to prior years: uplift signal of ∼10 km diameter located in the eastern part of the Hengill area, and geothermal production-related temporal changes in deformation near Húsmúli, in the western part of the Hengill area. We find an inflation source located between the Hengill and Hrómundartindur volcanic complexes, lasting for ∼5 months, with a maximum uplift of ∼12 mm. Our model inversions give a source at depth of ∼6–7 km, located approximately in the same crustal volume as an inferred contracting source in 2006–2017, within the local brittle-ductile transition zone. No significant changes were observed in local seismicity, borehole temperatures and pressures during the uplift episode. These transient inflation and deflation sources are located ∼3 km NW from a source of non-eruptive uplift in the area (1993–1999). We consider possible magmatic and hydrothermal processes as the causes for these inflation-deflation episodes and conclude that further geophysical and geological studies are needed to better understand such episodes. Dataset Iceland Unknown Hengill ENVELOPE(-21.306,-21.306,64.078,64.078) Hrómundartindur ENVELOPE(-21.200,-21.200,64.077,64.077) Nesjavellir ENVELOPE(-21.251,-21.251,64.115,64.115) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftsmithonian |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change volcano deformation satellite geodesy joint inversion volcano monitoring time-series analysis |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change volcano deformation satellite geodesy joint inversion volcano monitoring time-series analysis Cécile Ducrocq (11546275) Halldór Geirsson (11546278) Thóra Árnadóttir (11546281) Daniel Juncu (11546284) Vincent Drouin (11546287) Gunnar Gunnarsson (169400) Bjarni R. Kristjánsson (11546290) Freysteinn Sigmundsson (8263029) Sigrún Hreinsdóttir (11546293) Sigrún Tómasdóttir (11546296) Hanna Blanck (11546299) DataSheet1_Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland.pdf |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change volcano deformation satellite geodesy joint inversion volcano monitoring time-series analysis |
description |
Non-eruptive uplift and subsidence episodes remain a challenge for monitoring and hazard assessments in active volcanic systems worldwide. Sources of such deformation may relate to processes such as magma inflow and outflow, motion and phase changes of hydrothermal fluids or magma volatiles, heat transfer from magmatic bodies and heat-mining from geothermal extraction. The Hengill area, in southwest Iceland, hosts two active volcanic systems, Hengill and Hrómundartindur, and two high-temperature geothermal power plants, Hellisheiði and Nesjavellir. Using a combination of geodetic data sets (GNSS and InSAR; Global Navigation Satellite Systems and Interferometry Synthetic Aperture Radar, respectively) and a non-linear inversion scheme to estimate the optimal analytical model parameters, we investigate the ground deformation between 2017–2018. Due to other ongoing deformation processes in the area, such as plate motion, subsidence in the two geothermal production fields, and deep-seated source of contraction since 2006, we estimate 2017–2018 difference velocities by subtracting background deformation, determined from data spanning 2015–2017 (InSAR) or 2009–2017 (GNSS). This method highlights changes in ground deformation observed in 2017–2018 compared to prior years: uplift signal of ∼10 km diameter located in the eastern part of the Hengill area, and geothermal production-related temporal changes in deformation near Húsmúli, in the western part of the Hengill area. We find an inflation source located between the Hengill and Hrómundartindur volcanic complexes, lasting for ∼5 months, with a maximum uplift of ∼12 mm. Our model inversions give a source at depth of ∼6–7 km, located approximately in the same crustal volume as an inferred contracting source in 2006–2017, within the local brittle-ductile transition zone. No significant changes were observed in local seismicity, borehole temperatures and pressures during the uplift episode. These transient inflation and deflation sources are located ∼3 km NW from a source of non-eruptive uplift in the area (1993–1999). We consider possible magmatic and hydrothermal processes as the causes for these inflation-deflation episodes and conclude that further geophysical and geological studies are needed to better understand such episodes. |
format |
Dataset |
author |
Cécile Ducrocq (11546275) Halldór Geirsson (11546278) Thóra Árnadóttir (11546281) Daniel Juncu (11546284) Vincent Drouin (11546287) Gunnar Gunnarsson (169400) Bjarni R. Kristjánsson (11546290) Freysteinn Sigmundsson (8263029) Sigrún Hreinsdóttir (11546293) Sigrún Tómasdóttir (11546296) Hanna Blanck (11546299) |
author_facet |
Cécile Ducrocq (11546275) Halldór Geirsson (11546278) Thóra Árnadóttir (11546281) Daniel Juncu (11546284) Vincent Drouin (11546287) Gunnar Gunnarsson (169400) Bjarni R. Kristjánsson (11546290) Freysteinn Sigmundsson (8263029) Sigrún Hreinsdóttir (11546293) Sigrún Tómasdóttir (11546296) Hanna Blanck (11546299) |
author_sort |
Cécile Ducrocq (11546275) |
title |
DataSheet1_Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland.pdf |
title_short |
DataSheet1_Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland.pdf |
title_full |
DataSheet1_Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland.pdf |
title_fullStr |
DataSheet1_Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland.pdf |
title_full_unstemmed |
DataSheet1_Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland.pdf |
title_sort |
datasheet1_inflation-deflation episodes in the hengill and hrómundartindur volcanic complexes, sw iceland.pdf |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.725109.s001 |
long_lat |
ENVELOPE(-21.306,-21.306,64.078,64.078) ENVELOPE(-21.200,-21.200,64.077,64.077) ENVELOPE(-21.251,-21.251,64.115,64.115) |
geographic |
Hengill Hrómundartindur Nesjavellir |
geographic_facet |
Hengill Hrómundartindur Nesjavellir |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://figshare.com/articles/dataset/DataSheet1_Inflation-Deflation_Episodes_in_the_Hengill_and_Hr_mundartindur_Volcanic_Complexes_SW_Iceland_pdf/16782823 doi:10.3389/feart.2021.725109.s001 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2021.725109.s001 |
_version_ |
1766043614377410560 |