Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system
Detailed observations of the 2010 Eyjafjallajökull eruptions in Iceland show seismic activity propagating vertically through the entire crust during a ten-week period of volcanic unrest comprising multiple eruption episodes. Systematic changes in magma chemistry suggest a complex magmatic plumbing s...
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:2586 2023-05-15T16:09:27+02:00 Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system Tarasewicz, J. P. T. White, R. S. Woods, A. W. Brandsdóttir, B. Gudmundsson, M. T. 2012-10 application/pdf image/jpeg http://eprints.esc.cam.ac.uk/2586/ http://eprints.esc.cam.ac.uk/2586/1/2012GL053518-pip.pdf http://eprints.esc.cam.ac.uk/2586/2/GRL_front_page.jpg http://eprints.esc.cam.ac.uk/2586/3/2012GL053518.pdf https://doi.org/10.1029/2012GL053518 en eng AGU http://eprints.esc.cam.ac.uk/2586/1/2012GL053518-pip.pdf http://eprints.esc.cam.ac.uk/2586/2/GRL_front_page.jpg http://eprints.esc.cam.ac.uk/2586/3/2012GL053518.pdf Tarasewicz, J. P. T. and White, R. S. and Woods, A. W. and Brandsdóttir, B. and Gudmundsson, M. T. (2012) Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system. Geophysical Research Letters, 39. L19309. ISSN 0094–8276 DOI https://doi.org/10.1029/2012GL053518 <https://doi.org/10.1029/2012GL053518> 02 - Geodynamics Geophysics and Tectonics Article PeerReviewed 2012 ftucambridgeesc https://doi.org/10.1029/2012GL053518 2020-08-27T18:09:19Z Detailed observations of the 2010 Eyjafjallajökull eruptions in Iceland show seismic activity propagating vertically through the entire crust during a ten-week period of volcanic unrest comprising multiple eruption episodes. Systematic changes in magma chemistry suggest a complex magmatic plumbing system, tapping several accumulation zones at different depths containing magma of differing ages and compositions. During the eruption, a systematic downward propagation of seismicity through the crust and into the upper mantle to ~30 km depth occurred in a series of steps, each of which preceded an explosive surge in eruption rate. Here we show that the sequence of seismicity and eruptive activity may be explained by the downward propagation of a decompression wave that triggers magma release from progressively deeper sills in the crust. Comparing observations of the downward-propagating seismicity with the decompression of a series of model elastic sills suggests that each sill was 1-10 km3 in size. Article in Journal/Newspaper Eyjafjallajökull Iceland University of Cambridge, Department of Earth Sciences: ESC Publications Geophysical Research Letters 39 19 n/a n/a |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
02 - Geodynamics Geophysics and Tectonics |
spellingShingle |
02 - Geodynamics Geophysics and Tectonics Tarasewicz, J. P. T. White, R. S. Woods, A. W. Brandsdóttir, B. Gudmundsson, M. T. Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system |
topic_facet |
02 - Geodynamics Geophysics and Tectonics |
description |
Detailed observations of the 2010 Eyjafjallajökull eruptions in Iceland show seismic activity propagating vertically through the entire crust during a ten-week period of volcanic unrest comprising multiple eruption episodes. Systematic changes in magma chemistry suggest a complex magmatic plumbing system, tapping several accumulation zones at different depths containing magma of differing ages and compositions. During the eruption, a systematic downward propagation of seismicity through the crust and into the upper mantle to ~30 km depth occurred in a series of steps, each of which preceded an explosive surge in eruption rate. Here we show that the sequence of seismicity and eruptive activity may be explained by the downward propagation of a decompression wave that triggers magma release from progressively deeper sills in the crust. Comparing observations of the downward-propagating seismicity with the decompression of a series of model elastic sills suggests that each sill was 1-10 km3 in size. |
format |
Article in Journal/Newspaper |
author |
Tarasewicz, J. P. T. White, R. S. Woods, A. W. Brandsdóttir, B. Gudmundsson, M. T. |
author_facet |
Tarasewicz, J. P. T. White, R. S. Woods, A. W. Brandsdóttir, B. Gudmundsson, M. T. |
author_sort |
Tarasewicz, J. P. T. |
title |
Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system |
title_short |
Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system |
title_full |
Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system |
title_fullStr |
Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system |
title_full_unstemmed |
Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system |
title_sort |
magma mobilization by downward-propagating decompression of the eyjafjallajökull volcanic plumbing system |
publisher |
AGU |
publishDate |
2012 |
url |
http://eprints.esc.cam.ac.uk/2586/ http://eprints.esc.cam.ac.uk/2586/1/2012GL053518-pip.pdf http://eprints.esc.cam.ac.uk/2586/2/GRL_front_page.jpg http://eprints.esc.cam.ac.uk/2586/3/2012GL053518.pdf https://doi.org/10.1029/2012GL053518 |
genre |
Eyjafjallajökull Iceland |
genre_facet |
Eyjafjallajökull Iceland |
op_relation |
http://eprints.esc.cam.ac.uk/2586/1/2012GL053518-pip.pdf http://eprints.esc.cam.ac.uk/2586/2/GRL_front_page.jpg http://eprints.esc.cam.ac.uk/2586/3/2012GL053518.pdf Tarasewicz, J. P. T. and White, R. S. and Woods, A. W. and Brandsdóttir, B. and Gudmundsson, M. T. (2012) Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system. Geophysical Research Letters, 39. L19309. ISSN 0094–8276 DOI https://doi.org/10.1029/2012GL053518 <https://doi.org/10.1029/2012GL053518> |
op_doi |
https://doi.org/10.1029/2012GL053518 |
container_title |
Geophysical Research Letters |
container_volume |
39 |
container_issue |
19 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1766405337711116288 |