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Authors: Spang, Arne
Burton, Michael
Kaus, Boris J. P.
Sigmundsson, Freysteinn
Title: Quantification of volcano deformation caused by volatile accumulation and release
Online publication date: 2-Feb-2023
Year of first publication: 2023
Language: english
Abstract: Crustal-stored magma reservoirs contain exsolved volatiles which accumulate in the reservoir roof, exerting a buoyancy force on the crust. This produces surface uplift and sudden loss of volatiles through eruption results in syn-eruptive subsidence. Here, we present three-dimensional, visco-elasto-plastic, numerical modeling results which quantify the ground deformation arising from the growth and release of a volatile reservoir. Deformation is mostly independent of crustal thermal distribution and volatile reservoir shape, but is a function of volatile volume, density and depth and crustal rigidity. We present a scaling law for the volatiles' contribution to syn-eruptive subsidence and show this contributes ∼20% of the observed subsidence associated with the 2015 Calbuco eruption. Our results highlight the key role that volatile-driven buoyancy can have in volcano deformation, show a new link between syn-eruptive degassing and deflation, and highlight that shallow volatile accumulation and release may have a significant impact on ground deformation of volcanoes.
DDC: 550 Geowissenschaften
550 Earth sciences
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 09 Chemie, Pharmazie u. Geowissensch.
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: CC BY-NC
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Journal: Geophysical research letters
Pages or article number: 2021GL097502
Publisher: John Wiley & Sons, Ltd
Publisher place: Hoboken, NJ
ISSN: 1944-8007
Publisher DOI: 10.1029/2021GL097502
Appears in collections:DFG-491381577-H

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