Logarithmic Growth of Dikes From a Depressurizing Magma Chamber
Abstract Dike propagation is an intrinsically multiphase problem, where deformation and fluid flow are intricately coupled in a fracture process. Here we perform the first fully coupled simulations of dike propagation in two dimensions, accounting for depressurization of a circular magma chamber, dy...
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ftdoajarticles:oai:doaj.org/article:ec2189dcac8e45d2aea6fd4739b394f6 2024-09-15T18:13:56+00:00 Logarithmic Growth of Dikes From a Depressurizing Magma Chamber Benjamin E. Grossman‐Ponemon Elías R. Heimisson Adrian J. Lew Paul Segall 2020-02-01T00:00:00Z https://doi.org/10.1029/2019GL086230 https://doaj.org/article/ec2189dcac8e45d2aea6fd4739b394f6 EN eng Wiley https://doi.org/10.1029/2019GL086230 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2019GL086230 https://doaj.org/article/ec2189dcac8e45d2aea6fd4739b394f6 Geophysical Research Letters, Vol 47, Iss 4, Pp n/a-n/a (2020) dike propagation FEM simulations hydraulic fractures magma chambers eruption forecasting natural hazards Geophysics. Cosmic physics QC801-809 article 2020 ftdoajarticles https://doi.org/10.1029/2019GL086230 2024-08-05T17:48:42Z Abstract Dike propagation is an intrinsically multiphase problem, where deformation and fluid flow are intricately coupled in a fracture process. Here we perform the first fully coupled simulations of dike propagation in two dimensions, accounting for depressurization of a circular magma chamber, dynamic fluid flow, fracture formation, and elastic deformation. Despite the complexity of the governing equations, we observe that the lengthening is well explained by a simple model a(t)=c1log(1+t/c2), where a is the dike length, t is time, and c1 and c2 are constants. We compare the model to seismic data from eight dikes in Iceland and Ethiopia, and, in spite of the assumption of plane strain, we find good agreement between the data and the model. In addition, we derive an approximate model for the depressurization of the chamber with the dike length. These models may help forecast the growth of lateral dikes and magma chamber depressurization. Article in Journal/Newspaper Iceland Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 47 4 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
dike propagation FEM simulations hydraulic fractures magma chambers eruption forecasting natural hazards Geophysics. Cosmic physics QC801-809 |
spellingShingle |
dike propagation FEM simulations hydraulic fractures magma chambers eruption forecasting natural hazards Geophysics. Cosmic physics QC801-809 Benjamin E. Grossman‐Ponemon Elías R. Heimisson Adrian J. Lew Paul Segall Logarithmic Growth of Dikes From a Depressurizing Magma Chamber |
topic_facet |
dike propagation FEM simulations hydraulic fractures magma chambers eruption forecasting natural hazards Geophysics. Cosmic physics QC801-809 |
description |
Abstract Dike propagation is an intrinsically multiphase problem, where deformation and fluid flow are intricately coupled in a fracture process. Here we perform the first fully coupled simulations of dike propagation in two dimensions, accounting for depressurization of a circular magma chamber, dynamic fluid flow, fracture formation, and elastic deformation. Despite the complexity of the governing equations, we observe that the lengthening is well explained by a simple model a(t)=c1log(1+t/c2), where a is the dike length, t is time, and c1 and c2 are constants. We compare the model to seismic data from eight dikes in Iceland and Ethiopia, and, in spite of the assumption of plane strain, we find good agreement between the data and the model. In addition, we derive an approximate model for the depressurization of the chamber with the dike length. These models may help forecast the growth of lateral dikes and magma chamber depressurization. |
format |
Article in Journal/Newspaper |
author |
Benjamin E. Grossman‐Ponemon Elías R. Heimisson Adrian J. Lew Paul Segall |
author_facet |
Benjamin E. Grossman‐Ponemon Elías R. Heimisson Adrian J. Lew Paul Segall |
author_sort |
Benjamin E. Grossman‐Ponemon |
title |
Logarithmic Growth of Dikes From a Depressurizing Magma Chamber |
title_short |
Logarithmic Growth of Dikes From a Depressurizing Magma Chamber |
title_full |
Logarithmic Growth of Dikes From a Depressurizing Magma Chamber |
title_fullStr |
Logarithmic Growth of Dikes From a Depressurizing Magma Chamber |
title_full_unstemmed |
Logarithmic Growth of Dikes From a Depressurizing Magma Chamber |
title_sort |
logarithmic growth of dikes from a depressurizing magma chamber |
publisher |
Wiley |
publishDate |
2020 |
url |
https://doi.org/10.1029/2019GL086230 https://doaj.org/article/ec2189dcac8e45d2aea6fd4739b394f6 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Geophysical Research Letters, Vol 47, Iss 4, Pp n/a-n/a (2020) |
op_relation |
https://doi.org/10.1029/2019GL086230 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2019GL086230 https://doaj.org/article/ec2189dcac8e45d2aea6fd4739b394f6 |
op_doi |
https://doi.org/10.1029/2019GL086230 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
4 |
_version_ |
1810451728250699776 |