Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/15321
Authors: | Zuccarello, Francesco* Schiavi, Federica* Viccaro, Marco* |
Title: | Magma dehydration controls the energy of recent eruptions at Mt. Etna volcano | Journal: | Terra Nova | Series/Report no.: | /33 (2021) | Publisher: | John Wiley & Sons Ltd | Issue Date: | 17-Mar-2021 | DOI: | 10.1111/ter.12527 | URL: | https://onlinelibrary.wiley.com/doi/10.1111/ter.12527 | Subject Classification: | 04.08. Volcanology | Abstract: | Olivine-hosted melt inclusions (MIs) from tephra of the recent 2013–2018 activity at Mt. Etna were investigated for assessing the chemical evolution of magmas and quantifying their pre-eruptive volatile budget. Microanalyses revealed two types of MIs present in all investigated eruptions; the inclusions, particularly the less evolved ones, appear to have experienced water loss coupled with SiO2 depletion. Restoration of the original SiO2-H2O concentrations provides consistency with the thermodynamic modelling of magma evolution. The two types of MIs developed during crystallization of olivine plus clinopyroxene between 200 and 100 MPa, where magmas also experienced CO2 flushing. Degassing processes at these levels are responsible for water depletion in the melt and diffusive water loss from inclusions. Our data suggest that initial water budget is unchanged all over the last 20 years, reflecting therefore a potential in triggering highly explosive eruptions depending on degassing dynamics under open versus closed system conditions at shallow levels. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Magma Dehydration Controls Energy of Eruptions.pdf | Open Access published article | 613.98 kB | Adobe PDF | View/Open |
Page view(s)
20
checked on Mar 27, 2024
Download(s)
13
checked on Mar 27, 2024