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Volcanic conduit migration over a basement landslide at Mount Etna (Italy)
The flanks of volcanoes may slide in response to the loading of the edifice on a weak basement, magma push, and/or to tectonic stress. However, examples of stratovolcanoes emplaced on active landslides are lacking and the possible effects on the volcano dynamics unknown. Here, we use aeromagnetic da...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4055905/ https://www.ncbi.nlm.nih.gov/pubmed/24924784 http://dx.doi.org/10.1038/srep05293 |
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author | Nicolosi, I. Caracciolo, F. D'Ajello Branca, S. Ventura, G. Chiappini, M. |
author_facet | Nicolosi, I. Caracciolo, F. D'Ajello Branca, S. Ventura, G. Chiappini, M. |
author_sort | Nicolosi, I. |
collection | PubMed |
description | The flanks of volcanoes may slide in response to the loading of the edifice on a weak basement, magma push, and/or to tectonic stress. However, examples of stratovolcanoes emplaced on active landslides are lacking and the possible effects on the volcano dynamics unknown. Here, we use aeromagnetic data to construct a three-dimensional model of the clay-rich basement of Etna volcano (Italy). We provide evidence for a large stratovolcano growing on a pre-existing basement landslide and show that the eastern Etna flank, which slides toward the sea irrespective of volcanic activity, moves coherently with the underlying landslide. The filling of the landslide depression by lava flows through time allows the formation of a stiffness barrier, which is responsible for the long-term migration of the magma pathways from the coast to the present-day Etna summit. These unexpected results provide a new interpretation clue on the causes of the volcanic instability processes and of the mechanisms of deflection and migration of volcanic conduits. |
format | Online Article Text |
id | pubmed-4055905 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-40559052014-06-16 Volcanic conduit migration over a basement landslide at Mount Etna (Italy) Nicolosi, I. Caracciolo, F. D'Ajello Branca, S. Ventura, G. Chiappini, M. Sci Rep Article The flanks of volcanoes may slide in response to the loading of the edifice on a weak basement, magma push, and/or to tectonic stress. However, examples of stratovolcanoes emplaced on active landslides are lacking and the possible effects on the volcano dynamics unknown. Here, we use aeromagnetic data to construct a three-dimensional model of the clay-rich basement of Etna volcano (Italy). We provide evidence for a large stratovolcano growing on a pre-existing basement landslide and show that the eastern Etna flank, which slides toward the sea irrespective of volcanic activity, moves coherently with the underlying landslide. The filling of the landslide depression by lava flows through time allows the formation of a stiffness barrier, which is responsible for the long-term migration of the magma pathways from the coast to the present-day Etna summit. These unexpected results provide a new interpretation clue on the causes of the volcanic instability processes and of the mechanisms of deflection and migration of volcanic conduits. Nature Publishing Group 2014-06-13 /pmc/articles/PMC4055905/ /pubmed/24924784 http://dx.doi.org/10.1038/srep05293 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ |
spellingShingle | Article Nicolosi, I. Caracciolo, F. D'Ajello Branca, S. Ventura, G. Chiappini, M. Volcanic conduit migration over a basement landslide at Mount Etna (Italy) |
title | Volcanic conduit migration over a basement landslide at Mount Etna (Italy) |
title_full | Volcanic conduit migration over a basement landslide at Mount Etna (Italy) |
title_fullStr | Volcanic conduit migration over a basement landslide at Mount Etna (Italy) |
title_full_unstemmed | Volcanic conduit migration over a basement landslide at Mount Etna (Italy) |
title_short | Volcanic conduit migration over a basement landslide at Mount Etna (Italy) |
title_sort | volcanic conduit migration over a basement landslide at mount etna (italy) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4055905/ https://www.ncbi.nlm.nih.gov/pubmed/24924784 http://dx.doi.org/10.1038/srep05293 |
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