Logarithmic Growth of Dikes From a Depressurizing Magma Chamber
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 flu...
Published in: | Geophysical Research Letters |
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American Geophysical Union
2020
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ftcaltechauth:oai:authors.library.caltech.edu:102407 2023-05-15T16:49:23+02:00 Logarithmic Growth of Dikes From a Depressurizing Magma Chamber Grossman‐Ponemon, Benjamin E. Heimisson, Elías R. Lew, Adrian J. Segall, Paul 2020-02-28 application/pdf https://authors.library.caltech.edu/102407/ https://authors.library.caltech.edu/102407/1/2019GL086230.pdf https://authors.library.caltech.edu/102407/2/grl60233-sup-0001-2019gl086230-figure_si-s01.pdf https://resolver.caltech.edu/CaltechAUTHORS:20200408-134030103 en eng American Geophysical Union https://authors.library.caltech.edu/102407/1/2019GL086230.pdf https://authors.library.caltech.edu/102407/2/grl60233-sup-0001-2019gl086230-figure_si-s01.pdf Grossman‐Ponemon, Benjamin E. and Heimisson, Elías R. and Lew, Adrian J. and Segall, Paul (2020) Logarithmic Growth of Dikes From a Depressurizing Magma Chamber. Geophysical Research Letters, 47 (4). Art. No. e2019GL086230. ISSN 0094-8276. doi:10.1029/2019gl086230. https://resolver.caltech.edu/CaltechAUTHORS:20200408-134030103 <https://resolver.caltech.edu/CaltechAUTHORS:20200408-134030103> other Article PeerReviewed 2020 ftcaltechauth https://doi.org/10.1029/2019gl086230 2021-11-18T18:55:13Z 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) = c₁ log(1 + t/c₂), where is the dike length, 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 Caltech Authors (California Institute of Technology) Geophysical Research Letters 47 4 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
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) = c₁ log(1 + t/c₂), where is the dike length, 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 |
Grossman‐Ponemon, Benjamin E. Heimisson, Elías R. Lew, Adrian J. Segall, Paul |
spellingShingle |
Grossman‐Ponemon, Benjamin E. Heimisson, Elías R. Lew, Adrian J. Segall, Paul Logarithmic Growth of Dikes From a Depressurizing Magma Chamber |
author_facet |
Grossman‐Ponemon, Benjamin E. Heimisson, Elías R. Lew, Adrian J. Segall, Paul |
author_sort |
Grossman‐Ponemon, Benjamin E. |
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 |
American Geophysical Union |
publishDate |
2020 |
url |
https://authors.library.caltech.edu/102407/ https://authors.library.caltech.edu/102407/1/2019GL086230.pdf https://authors.library.caltech.edu/102407/2/grl60233-sup-0001-2019gl086230-figure_si-s01.pdf https://resolver.caltech.edu/CaltechAUTHORS:20200408-134030103 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://authors.library.caltech.edu/102407/1/2019GL086230.pdf https://authors.library.caltech.edu/102407/2/grl60233-sup-0001-2019gl086230-figure_si-s01.pdf Grossman‐Ponemon, Benjamin E. and Heimisson, Elías R. and Lew, Adrian J. and Segall, Paul (2020) Logarithmic Growth of Dikes From a Depressurizing Magma Chamber. Geophysical Research Letters, 47 (4). Art. No. e2019GL086230. ISSN 0094-8276. doi:10.1029/2019gl086230. https://resolver.caltech.edu/CaltechAUTHORS:20200408-134030103 <https://resolver.caltech.edu/CaltechAUTHORS:20200408-134030103> |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2019gl086230 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
4 |
_version_ |
1766039532693618688 |