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Deep sea explosive eruptions may be not so different from subaerial eruptions

Articolo
Data di Pubblicazione:
2020
Abstract:
The dynamics of deep sea explosive eruptions, the dispersion of the pyroclasts, and how submarine eruptions differ from the subaerial ones are still poorly known due to the limited access to sea environments. Here, we analyze two ash layers representative of the proximal and distal deposits of two submarine eruptions from a 500 to 800 m deep cones of the Marsili Seamount (Italy). Fall deposits occur at a distance of more than 1.5 km from the vent, while volcanoclastic flows are close to the flanks of the cone. Ash shows textures indicative of poor magma-water interaction and a gas-rich environment. X-ray microtomography data on ash morphology and bubbles, along with gas solubility and ash dispersion models suggest 200–400 m high eruptive columns and a sea current velocity <5 cm/s. In deep sea environments, Strombolian-like eruptions are similar to the subaerial ones provided that a gas cloud occurs around the vent.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
article; ash; deep sea; Italy; micro-computed tomography;
Elenco autori:
Iezzi, G.; Lanzafame, G.; Mancini, L.; Behrens, H.; Tamburrino, S.; Vallefuoco, M.; Passaro, S.; Signanini, P.; Ventura, G.
Autori di Ateneo:
IEZZI Gianluca
Link alla scheda completa:
https://ricerca.unich.it/handle/11564/726357
Link al Full Text:
https://ricerca.unich.it//retrieve/handle/11564/726357/265486/s41598-020-63737-7.pdf
Pubblicato in:
SCIENTIFIC REPORTS
Journal
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URL

https://www.nature.com/articles/s41598-020-63737-7
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