Gennaio 2023

PubAIV Visite: 161
PubAIV 2023
(aggiornamento di Gennaio 2023)
TEMATICHE GENERALI:

1) Magmi e sistemi di alimentazione (2 articoli) 
2) Dinamiche eruttive e di messa in posto (0 articoli)
3) Geologia e struttura dei vulcani (2 articoli)
4) Monitoraggio, pericolosità e rischio vulcanico (0 articoli)
5) Vulcani e società (0 articoli)

Tematica 1: Magmi e sistemi di alimentazione
Costa S., Caricchi L., Pistolesi M., Gioncada A., Masotta M., Bonadonna C., Rosi M. (2023)
A data driven approach to mineral chemistry unveils magmatic processes associated with long-lasting, low-intensity volcanic activity.
Sci Rep 13, 1314 (2023)
https://doi.org/10.1038/s41598-023-28370-0
Data di pubblicazione: 24/01/2023
PubAIV-ID-00096 - Articolo in Rivista (open access)
Abstract
The most frequent volcanic eruptions are of low‐intensity and small magnitude. They produce abundant ash‐sized (< 2 mm) clasts, which are too small to establish quantitative links between magmatic processes and eruptive dynamics using classic approaches. This inhibits our ability to study the past behaviour of frequently erupting volcanoes, essential to predict their future activity and mitigate their impact. The Palizzi unit (10–13th century, Vulcano, Italy) includes a prototype sequence of ash deposits resulting from prolonged Vulcanian eruptions punctuated by those of two larger sub‐Plinian events. We apply Hierarchical Clustering to chemical analyses of clinopyroxene collected along the stratigraphy to decipher magma dynamics during this eruptive period. We identify periods of magma input and we link deep magmatic processes to eruptive dynamics, also showing that our approach can be used to connect magma and eruptive dynamics in any volcanic sequence. This is essential to track the processes occurring during frequent eruptions and to identify the build‐up to larger explosive events.
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Lo Forte F.M., Aiuppa A., Rotolo S.G., Zanon V. (2022)
Temporal evolution of the Fogo Volcano magma storage system (Cape Verde Archipelago): a fluid inclusions perspective.
Journal of Volcanology and Geothermal Research, Volume 433, 2023.
https://doi.org/10.1016/j.jvolgeores.2022.107730
Data di pubblicazione: 05/12/2022
PubAIV-ID-00095 - Articolo in Rivista (open access)
Abstract
The architecture of the magma storage system underneath Fogo Volcano (Cape Verde Archipelago) is characterised
using novel fluid inclusion results from fifteen basanites, spanning the last 120 thousand years of volcanic
activity, and encompassing a major flank collapse event at ~73 ka. Fluid inclusions, hosted in olivine and clinopyroxene,
are made of pure CO2, and based on their textural characteristics, are distinguished in early (Type I)
and late (Type II) stage. Inclusions homogenize to a liquid phase in the 2.8 to 30.8 °C temperature range.
Densities values, recalculated assuming an original 10% H2O content at the time of trapping, range from 543 to
952 kg⋅m3, and correspond to entrapment or re-equilibration pressure ranges of 500–595 MPa, 700–740 MPa,
and 245–610 MPa respectively for pre-collapse, early post-collapse, and Holocene/historical eruptions. These
entrapment pressures are interpreted as reflecting the existence of two main magma accumulation zones at ~25
km and ~ 13–21 km depth, and a zone of fluid inclusion re-equilibration at 9–12 km depth. There is evidence of a
complex temporal evolution of the magma system. Historical eruptions, and especially the three most recent ones
(occurred in 1951, 1995 and 2014–25), bring fluid inclusion evidence for transient, pre-eruptive shallow (9–17
km depth) magma ponding. Early post-collapse (60 ka) volcanics, in contrast, document fast magma transport
from ~25 km, and suggest a reconfiguration of the magma system after the Monte Amarelo collapse event.
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Tematica 2: Dinamiche eruttive e di messa in posto
Tematica 3: Geologia e struttura dei vulcani
Malaguti A.B., Branca S., Speranza F., Coltelli M., Del Carlo P., Renzulli A. (2023)
Age of the Valle del Bove formation and chronology of the post-collapse flank eruptions, Etna volcano (Italy).
Journal of Volcanology and Geothermal Research, Volume 434
https://doi.org/10.1016/j.jvolgeores.2023.107752
Data di pubblicazione: 13/01/2023
PubAIV-ID-00097 - Articolo in Rivista (non open access)
Abstract
The Valle del Bove is a profound and wide scar on the east Etna flank witnessing the Holocene main volcano-tectonic event of the volcano, frequently invaded by lava flows during the last centuries. The Valle del Bove slope failure produced the Milo debris avalanche deposit on the lower east flank that is partially covered by the Mongibello lavas and a pyroclastic succession. In this paper, we constrain for the first time the age of the Milo debris avalanche deposit and the overlying lava succession exposed at three quarries recently caved at the valley mouth through a multidisciplinary approach integrating stratigraphic and petrographic analyses, 14C, and paleomagnetic dating. In particular, 14C age determinations of the Milo debris avalanche deposit indicate that the initial stage of the catastrophic flank collapse of the Valle del Bove occurred at 7478–7134 BCE during the Mesolithic age. Conversely, the main portion of the lava succession filling the valley floor emplaced after the sub-Plinian picritic eruption occurred at 2579–2278 BCE (FS tephra layer) consistently with the increasing occurrence frequency of flank eruptions documented in the geological record of Etna during the past 4000 yrs. Paleomagnetic dating highlighted that in the study area the sub-Plinian eruption was followed by two quasi-contemporaneous flank eruptions during the Late Copper age (2600–2400 BCE), whereas other two flank eruptions occurred during Greek-Roman and Medieval ages. These results have relevant implications on the stratigraphy and evolution of Etna, particularly on the Valle del Bove initial collapse and the relative emplacement of the Chiancone detritic-alluvial sequence.
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Scandone R. (2022)
Vesuvio, storie di uomini e vulcani.
Link
Data di pubblicazione: 30/12/2022
PubAIV-ID-00094 - Libro
Abstract
Nel tentativo di tenere vivo il ricordo di un vulcano ancora attivo, ne ripercorriamo la storia e il suo intreccio con le vicende umane, evidenziando il ruolo da esso svolto nello sviluppo della vulcanologia nonché i drammi legati alla sua imprevedibilità..
Seguiremo cronologicamente l’attività del vulcano e gli studi fatti per conoscerlo, fin dagli inizi, entrando più dettagliatamente nel periodo storico, con le molte eruzioni che hanno provocato lutti e rovine e allo stesso tempo hanno generato un territorio fertile, stimolato una società vivace e circondato di attenzione un panorama di ineguagliabile bellezza.
Tematica 4: Monitoraggio, pericolosità e rischio vulcanico
Tematica 5: Vulcani e società
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