Five years of gas monitoring from selected sites suggest that Mt Etna's plumbing system is much more extensive than previously reported. It extends at least 40 km SW from the volcano's boundary along the NE-SW regional fault, where it discharge about 200 tons/day of gas, containing helium with mantle-type isotopic composition. Synchronous variations of 3He/4He isotopic ratios in gas sampled at sites located 60 kilometers apart have allowed us to detect pulses of ascending magma in the plumbing system, thus providing a powerful tool for eruption forecasting. Following summer 2001 eruption, the still increasing trend of the 3He/4He ratios indicates that magma storage is even now occurring at a shallow depth. Hence, the volcano maintains a high capacity to re-erupt within the next few months.

Caracausi, A., Favara, R., Giammanco, S., Italiano, F., Nuccio, P., Paonita, A., et al. (2003). Mount Etna: Geochemical signals of magma ascent and unusually extensive plumbing system. GEOPHYSICAL RESEARCH LETTERS, 30(2), 1-4 [10.1029/2002GL015463].

Mount Etna: Geochemical signals of magma ascent and unusually extensive plumbing system

Rizzo, A
2003

Abstract

Five years of gas monitoring from selected sites suggest that Mt Etna's plumbing system is much more extensive than previously reported. It extends at least 40 km SW from the volcano's boundary along the NE-SW regional fault, where it discharge about 200 tons/day of gas, containing helium with mantle-type isotopic composition. Synchronous variations of 3He/4He isotopic ratios in gas sampled at sites located 60 kilometers apart have allowed us to detect pulses of ascending magma in the plumbing system, thus providing a powerful tool for eruption forecasting. Following summer 2001 eruption, the still increasing trend of the 3He/4He ratios indicates that magma storage is even now occurring at a shallow depth. Hence, the volcano maintains a high capacity to re-erupt within the next few months.
Articolo in rivista - Articolo scientifico
MT- Etna; Volcano; Storage; Gases; Co2
English
2003
30
2
1
4
1057
reserved
Caracausi, A., Favara, R., Giammanco, S., Italiano, F., Nuccio, P., Paonita, A., et al. (2003). Mount Etna: Geochemical signals of magma ascent and unusually extensive plumbing system. GEOPHYSICAL RESEARCH LETTERS, 30(2), 1-4 [10.1029/2002GL015463].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/428178
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