Benito-Saz, M, Parks, MM, Sigmundsson, F et al. (2 more authors) (2017) Repeated magmatic intrusions at El Hierro Island following the 2011–2012 submarine eruption. Journal of Volcanology and Geothermal Research, 344. pp. 79-91. ISSN 0377-0273
Abstract
After more than 200 years of quiescence, in July 2011 an intense seismic swarm was detected beneath the center of El Hierro Island (Canary Islands), culminating on 10 October 2011 in a submarine eruption, 2 km off the southern coast. Although the eruption officially ended on 5 March 2012, magmatic activity continued in the area. From June 2012 to March 2014, six earthquake swarms, indicative of magmatic intrusions, were detected underneath the island. We have studied these post-eruption intrusive events using GPS and InSAR techniques to characterize the ground surface deformation produced by each of these intrusions, and to determine the optimal source parameters (geometry, location, depth, volume change). Source inversions provide insight into the depth of the intrusions (~ 11–16 km) and the volume change associated with each of them (between 0.02 and 0.13 km3). During this period, > 20 cm of uplift was detected in the central-western part of the island, corresponding to approximately 0.32–0.38 km3 of magma intruded beneath the volcano. We suggest that these intrusions result from deep magma migrating from the mantle, trapped at the mantle/lower crust discontinuity in the form of sill-like bodies. This study, using joint inversion of GPS and InSAR data in a post-eruption period, provides important insight into the characteristics of the magmatic plumbing system of El Hierro, an oceanic intraplate volcanic island.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Published by Elsevier B.V. This is an author produced version of a paper published in Journal of Volcanology and Geothermal Research. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Volcano deformation; InSAR/GPS joint inversion; Canary Islands; El Hierro |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 03 Feb 2017 15:22 |
Last Modified: | 02 Feb 2018 01:38 |
Published Version: | https://doi.org/10.1016/j.jvolgeores.2017.01.020 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jvolgeores.2017.01.020 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:111850 |