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Deep crustal melt plumbing of Bárðarbunga volcano, Iceland

Deep crustal melt plumbing of Bárðarbunga volcano, Iceland
Deep crustal melt plumbing of Bárðarbunga volcano, Iceland
Understanding magmatic plumbing within the Earth's crust is important for understanding volcanic systems and improving eruption forecasting. We discuss magma plumbing under Bárðarbunga volcano, Iceland, over a 4 year period encompassing the largest Icelandic eruption in 230 years. Microseismicity extends through the usually ductile region of the Earth's crust, from 7 to 22 km depth in a subvertical column. Moment tensor solutions for an example earthquake exhibits opening tensile crack behavior. This is consistent with the deep (>7 km) seismicity being caused by the movement of melt in the normally aseismic crust. The seismically inferred melt path from the mantle source is offset laterally from the center of the Bárðarbunga caldera by ~12 km, rather than lying directly beneath it. It is likely that an aseismic melt feed also exists directly beneath the caldera and is aseismic due to elevated temperatures and pervasive partial melt under the caldera.
0094-8276
8785-8794
Hudson, T. S.
176ebf99-115b-415f-885c-31a7729b38fd
White, R. S.
e511d05b-42f6-4ee0-9838-3c432c54aa76
Greenfield, T.
be593d17-54a8-4c18-ac57-9ce1bfe3920f
Ágústsdóttir, T.
0199b663-adb2-4762-8eab-58dd605c6d26
Brisbourne, A.
885c8c00-a763-4c38-aab8-d49a065897bd
Green, R. G.
1fa2f4d6-3f2b-4ed9-aee0-8ddbb5487d63
Hudson, T. S.
176ebf99-115b-415f-885c-31a7729b38fd
White, R. S.
e511d05b-42f6-4ee0-9838-3c432c54aa76
Greenfield, T.
be593d17-54a8-4c18-ac57-9ce1bfe3920f
Ágústsdóttir, T.
0199b663-adb2-4762-8eab-58dd605c6d26
Brisbourne, A.
885c8c00-a763-4c38-aab8-d49a065897bd
Green, R. G.
1fa2f4d6-3f2b-4ed9-aee0-8ddbb5487d63

Hudson, T. S., White, R. S., Greenfield, T., Ágústsdóttir, T., Brisbourne, A. and Green, R. G. (2017) Deep crustal melt plumbing of Bárðarbunga volcano, Iceland. Geophysical Research Letters, 44 (17), 8785-8794. (doi:10.1002/2017GL074749).

Record type: Article

Abstract

Understanding magmatic plumbing within the Earth's crust is important for understanding volcanic systems and improving eruption forecasting. We discuss magma plumbing under Bárðarbunga volcano, Iceland, over a 4 year period encompassing the largest Icelandic eruption in 230 years. Microseismicity extends through the usually ductile region of the Earth's crust, from 7 to 22 km depth in a subvertical column. Moment tensor solutions for an example earthquake exhibits opening tensile crack behavior. This is consistent with the deep (>7 km) seismicity being caused by the movement of melt in the normally aseismic crust. The seismically inferred melt path from the mantle source is offset laterally from the center of the Bárðarbunga caldera by ~12 km, rather than lying directly beneath it. It is likely that an aseismic melt feed also exists directly beneath the caldera and is aseismic due to elevated temperatures and pervasive partial melt under the caldera.

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Deep crustal melt plumbing of Bardarbunga volcano, Iceland, Hudson et al 2017 PRE TYPESETTING
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More information

Accepted/In Press date: 4 August 2017
e-pub ahead of print date: 9 September 2017
Published date: 16 September 2017

Identifiers

Local EPrints ID: 414722
URI: http://eprints.soton.ac.uk/id/eprint/414722
ISSN: 0094-8276
PURE UUID: 3c51ec6d-0b0a-4a72-b146-17ad56191446
ORCID for T. Greenfield: ORCID iD orcid.org/0000-0002-4370-7298

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Date deposited: 09 Oct 2017 16:30
Last modified: 28 Jan 2022 05:02

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Contributors

Author: T. S. Hudson
Author: R. S. White
Author: T. Greenfield ORCID iD
Author: T. Ágústsdóttir
Author: A. Brisbourne
Author: R. G. Green

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