scholarly journals Feeding system and magma storage beneath Mt. Etna as revealed by recent inflation/deflation cycles

2008 ◽  
Vol 113 (B5) ◽  
Author(s):  
Alessandro Bonforte ◽  
Alessandro Bonaccorso ◽  
Francesco Guglielmino ◽  
Mimmo Palano ◽  
Giuseppe Puglisi
Keyword(s):  
Feeding System ◽  
Magma Storage ◽  
Mt Etna

scholarly journals Combining High- and Low-Rate Geodetic Data Analysis for Unveiling Rapid Magma Transfer Feeding a Sequence of Violent Summit Paroxysms at Etna in Late 2015

2021 ◽  
Vol 11 (10) ◽  
pp. 4630
Author(s):  
Alessandro Bonforte ◽  
Flavio Cannavò ◽  
Salvatore Gambino ◽  
Francesco Guglielmino
Keyword(s):  
Ground Deformation ◽  
High Rate ◽  
Rate Data ◽  
Scale Analysis ◽  
Feeding System ◽  
Magma Sources ◽  
Mt Etna ◽  
Multi Temporal ◽  
Gnss Measurements ◽  
Low Rate

We propose a multi-temporal-scale analysis of ground deformation data using both high-rate tilt and GNSS measurements and the DInSAR and daily GNSS solutions in order to investigate a sequence of four paroxysmal episodes of the Voragine crater occurring in December 2015 at Mt. Etna (Italy). The analysis aimed at inferring the magma sources feeding a sequence of very violent eruptions, in order to understand the dynamics and to image the shallow feeding system of the volcano that enabled such a rapid magma accumulation and discharge. The high-rate data allowed us to constrain the sources responsible for the fast and violent dynamics of each paroxysm, while the cumulated deformation measured by DInSAR and daily GNSS solutions, over a period of 12 days encompassing the entire eruptive sequence, also showed the deeper part of the source involved in the considered period, where magma was stored. We defined the dynamics and rates of the magma transfer, with a middle-depth storage of gas-rich magma that charges, more or less continuously, a shallower level where magma stops temporarily, accumulating pressure due to the gas exsolution. This machine-gun-like mechanism could represent a general conceptual model for similar events at Etna and at all volcanoes.

Chemical-physical constraints of the 2015 eruptive activity of Mt. Etna: new insights from thermo-barometry and geochemistry of olivine-hosted melt inclusions

2021 ◽  
Author(s):  
Pier Paolo Giacomoni ◽  
Federico Casetta ◽  
Virginia Valenti ◽  
Carmelo Ferlito ◽  
Gabriele Lanzafame ◽  
...  
Keyword(s):  
Melt Inclusions ◽  
New South ◽  
Basalt Magma ◽  
Feeding System ◽  
Physical Constraints ◽  
Eruptive Event ◽  
North East ◽  
Central Crater ◽  
Mt Etna ◽  
Crystallization Conditions

<p>The concomitant activation off all four summit craters of Mt. Etna during the December 2015 eruptive event allow us to investigate the chemical-physical crystallization conditions and magma dynamics in the shallower portion of the open-conduit feeding system. In this study, we discuss new petrological, geochemical and thermo-barometric data as well as the composition of major element and volatile content (H<sub>2</sub>O, CO<sub>2</sub>, F, Cl and S) of olivine-hosted melt inclusions from the explosive and effusive products emitted during the December 2015 eruptive event.</p><p>Results and rhyolite-MELTS thermodynamic modelling of mineral phase stability highlight the relatively shallow crystal equilibrium depth prior to the eruption ranging from 400-500 MPa for Central Crater and North East Crater, up to 200 MPa below the New South East Crater. The study of high-pressure and high-temperature homogenized olivine-hosted melt inclusions allowed us to identify the composition of the almost primary alkali-basalt magma (11.8 wt% MgO) containing up to 4.9 wt% and 8151 ppm of H<sub>2</sub>O and CO<sub>2 </sub>respectively. The results, together with those already reported for the previous paroxystic events of the 2011-2012 (Giacomoni et al., 2018), reinforce the model of a vertically extended feeding system and highlight that the activity at the New South East Crater was fed by a magma residing at significant shallower depth with respect to Central Craters and North East Crater, although all conduits are fed by a common deep (P = 530-440 MPa) basic magmatic refilling. Plagioclase stability model and dissolution and resorption textures confirm its dependence on H<sub>2</sub>O content, thus suggesting that further studies on the effect that flushing from fluids with different H<sub>2</sub>O/CO<sub>2</sub> ratio are needed in order to understand the eruption triggering mechanisms of paroxystic fountaining.</p><p> </p><p><strong>References</strong></p><p>Giacomoni P., Coltorti M., Mollo S., Ferlito C., Braiato M., Scarlato P. 2018. The 2011-2012 paroxysmal eruptions at Mt. Etna volcano: Insights on the vertically zoned plumbing system. JVGR 349, 370-391.</p>

Geochemical and isotopic monitoring of Mt. Etna 1989–1993 eruptive activity: bearing on the shallow feeding system

1995 ◽  
Vol 64 (1-2) ◽  
pp. 95-115 ◽  
Author(s):  
S. Tonarini ◽  
P. Armienti ◽  
M. D'Orazio ◽  
F. Innocenti ◽  
M. Pompilio ◽  
...  
Keyword(s):  
Feeding System ◽  
Eruptive Activity ◽  
Mt Etna

Petrology and Sr-Nd isotope geochemistry of recent lavas from Mt. Etna: bearing on the volcano feeding system

1989 ◽  
Vol 39 (4) ◽  
pp. 315-327 ◽  
Author(s):  
Pietro Armienti ◽  
Fabrizio Innocenti ◽  
Riccardo Petrini ◽  
Massimo Pompilio ◽  
Letterio Villari
Keyword(s):  
Isotope Geochemistry ◽  
Feeding System ◽  
Nd Isotope ◽  
Mt Etna

scholarly journals Thermo-barometric constraints on the Mt. Etna 2015 eruptive event

2021 ◽  
Vol 176 (11) ◽  
Author(s):  
P. P. Giacomoni ◽  
F. Casetta ◽  
V. Valenti ◽  
C. Ferlito ◽  
G. Lanzafame ◽  
...  
Keyword(s):  
New South ◽  
Mount Etna ◽  
Feeding System ◽  
Mixing Processes ◽  
North East ◽  
Stability Model ◽  
Eruption Triggering ◽  
Mt Etna ◽  
Crystallization Conditions ◽  
Triggering Mechanisms

AbstractThe petrological study of volcanic products emitted during the paroxysmal events of December 2015 from the summit craters of Mount Etna allow us to constrain T-P-XH2O phase stability, crystallization conditions, and mixing processes along the main open-conduit feeding system. In this study, we discuss new geochemical, thermo-barometric data and related Rhyolite-MELTS modelling of the eruptive activity that involved the concomitant activation of all summit craters. The results, in comparison with the previous paroxysmal events of the 2011–2012, reinforce the model of a vertically extended feeding system and highlight that the activity at the New South-East Crater was fed by magma residing at a significantly shallower depth with respect to the Central Craters (CC) and North-East Crater (NEC), even if all conduits were fed by a common deep (P = 530–440 MPa) basic magmatic input. Plagioclase dissolution, resorption textures, and the Rhyolite-MELTS stability model corroborate its dependence on H2O content; thus, suggesting that further studies on the effect that flushing from fluids with different H2O/CO2 ratio are needed to understand the eruption-triggering mechanisms for high energetic strombolian paroxysmal episodes.

Shallow magma storage beneath Mt. Etna: Evidence from new attenuation tomography and existing velocity models

2021 ◽  
Author(s):  
I. Castro‐Melgar ◽  
J. Prudencio ◽  
E. Pezzo ◽  
E. Giampiccolo ◽  
J. M. Ibáñez
Keyword(s):  
Magma Storage ◽  
Velocity Models ◽  
Mt Etna
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