Titill: | Unexpected large eruptions from buoyant magma bodies within viscoelastic crust |
Höfundur: |
... 10 fleiri höfundar Sýna alla höfunda |
Útgáfa: | 2020-05-15 |
Tungumál: | Enska |
Umfang: | 2403 |
Háskóli/Stofnun: | Háskóli Íslands University of Iceland |
Svið: | Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) |
Deild: | Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) |
Birtist í: | Nature Communications;11(1) |
ISSN: | 2041-1723 |
DOI: | 10.1038/s41467-020-16054-6 |
Efnisorð: | Buoyant magma; Volcanic eruption; Plastic deformation; Bergkvika; Eldgos; Jarðskorpa |
URI: | https://hdl.handle.net/20.500.11815/2150 |
Tilvitnun:Sigmundsson, F., Pinel, V., Grapenthin, R. et al. Unexpected large eruptions from buoyant magma bodies within viscoelastic crust. Nature Communications 11, 2403 (2020). https://doi.org/10.1038/s41467-020-16054-6
|
|
Útdráttur:Large volume effusive eruptions with relatively minor observed precursory signals are at odds with widely used models to interpret volcano deformation. Here we propose a new modelling framework that resolves this discrepancy by accounting for magma buoyancy, viscoelastic crustal properties, and sustained magma channels. At low magma accumulation rates, the stability of deep magma bodies is governed by the magma-host rock density contrast and the magma body thickness. During eruptions, inelastic processes including magma mush erosion and thermal effects, can form a sustained channel that supports magma flow, driven by the pressure difference between the magma body and surface vents. At failure onset, it may be difficult to forecast the final eruption volume; pressure in a magma body may drop well below the lithostatic load, create under-pressure and initiate a caldera collapse, despite only modest precursors.
|
|
Athugasemdir:Publisher's version (útgefin grein)
|
|
Leyfi:Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
|