Gas buffering of magma chamber contraction during persistent explosive activity at Mt. Etna volcano
Abstract A sequence of more than 20 short-lasting explosive eruptions took place at Mt. Etna volcano, during a 2-month period in 2021. Here we perform a joint analysis of the gravity decrease and ground deflation that accompanied the sequence of eruptions. Results from this joint analysis are cross-...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-12-01
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| Series: | Communications Earth & Environment |
| Online Access: | https://doi.org/10.1038/s43247-023-01149-x |
| _version_ | 1797388086450061312 |
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| author | Daniele Carbone Flavio Cannavò Chiara Paola Montagna Filippo Greco |
| author_facet | Daniele Carbone Flavio Cannavò Chiara Paola Montagna Filippo Greco |
| author_sort | Daniele Carbone |
| collection | DOAJ |
| description | Abstract A sequence of more than 20 short-lasting explosive eruptions took place at Mt. Etna volcano, during a 2-month period in 2021. Here we perform a joint analysis of the gravity decrease and ground deflation that accompanied the sequence of eruptions. Results from this joint analysis are cross-checked against the output of a numerical code providing independent geochemical insight on how the density of the magmatic liquid/gas mixture in the source reservoir varies as a function of the pressure. This cross-analysis provides a framework to explain why (i) the bulk volume reduction sensed by the ground deformation data is much lower than the volume of the erupted products and (ii) the observed gravity changes point to a strong mass decrease, incompatible with a pure mechanism of magma withdrawal. We conclude that pressure-driven gas exsolution and expansion compensated the withdrawal of magma, thus buffering the contraction of the source reservoir and leading to the inferred mass decrease. |
| first_indexed | 2024-03-08T22:35:42Z |
| format | Article |
| id | doaj.art-c49a4514739646e391e79ad59f31fd9e |
| institution | Directory Open Access Journal |
| issn | 2662-4435 |
| language | English |
| last_indexed | 2024-03-08T22:35:42Z |
| publishDate | 2023-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Earth & Environment |
| spelling | doaj.art-c49a4514739646e391e79ad59f31fd9e2023-12-17T12:31:02ZengNature PortfolioCommunications Earth & Environment2662-44352023-12-01411810.1038/s43247-023-01149-xGas buffering of magma chamber contraction during persistent explosive activity at Mt. Etna volcanoDaniele Carbone0Flavio Cannavò1Chiara Paola Montagna2Filippo Greco3Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania - Osservatorio EtneoIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania - Osservatorio EtneoIstituto Nazionale di Geofisica e Vulcanologia, Sezione di PisaIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania - Osservatorio EtneoAbstract A sequence of more than 20 short-lasting explosive eruptions took place at Mt. Etna volcano, during a 2-month period in 2021. Here we perform a joint analysis of the gravity decrease and ground deflation that accompanied the sequence of eruptions. Results from this joint analysis are cross-checked against the output of a numerical code providing independent geochemical insight on how the density of the magmatic liquid/gas mixture in the source reservoir varies as a function of the pressure. This cross-analysis provides a framework to explain why (i) the bulk volume reduction sensed by the ground deformation data is much lower than the volume of the erupted products and (ii) the observed gravity changes point to a strong mass decrease, incompatible with a pure mechanism of magma withdrawal. We conclude that pressure-driven gas exsolution and expansion compensated the withdrawal of magma, thus buffering the contraction of the source reservoir and leading to the inferred mass decrease.https://doi.org/10.1038/s43247-023-01149-x |
| spellingShingle | Daniele Carbone Flavio Cannavò Chiara Paola Montagna Filippo Greco Gas buffering of magma chamber contraction during persistent explosive activity at Mt. Etna volcano Communications Earth & Environment |
| title | Gas buffering of magma chamber contraction during persistent explosive activity at Mt. Etna volcano |
| title_full | Gas buffering of magma chamber contraction during persistent explosive activity at Mt. Etna volcano |
| title_fullStr | Gas buffering of magma chamber contraction during persistent explosive activity at Mt. Etna volcano |
| title_full_unstemmed | Gas buffering of magma chamber contraction during persistent explosive activity at Mt. Etna volcano |
| title_short | Gas buffering of magma chamber contraction during persistent explosive activity at Mt. Etna volcano |
| title_sort | gas buffering of magma chamber contraction during persistent explosive activity at mt etna volcano |
| url | https://doi.org/10.1038/s43247-023-01149-x |
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