Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6497
AuthorsAiuppa, A.* 
Bertagnini, A.* 
Métrich, N.* 
Moretti, R.* 
Di Muro, A.* 
Liuzzo, M.* 
Tamburello, G.* 
TitleA model of degassing for Stromboli volcano
Issue Date15-Jun-2010
Series/Report no.1-2/295(2010)
DOI10.1016/j.epsl.2010.03.040
URIhttp://hdl.handle.net/2122/6497
Keywordsvolcanic degassing
Stromboli
volcanic gases
CO2 fluxing
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.01. Gases 
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk 
AbstractA better understanding of degassing processes at open-vent basaltic volcanoes requires collection of new datasets of H2O–CO2–SO2 volcanic gas plume compositions, which acquisition has long been hampered by technical limitations. Here, we use the MultiGAS technique to provide the best-documented record of gas plume discharges from Stromboli volcano to date. We show that Stromboli's gases are dominated by H2O (48–98 mol%; mean, 80%), and by CO2 (2–50 mol%; mean, 17%) and SO2 (0.2–14 mol%; mean, 3%). The significant temporal variability in our dataset reflects the dynamic nature of degassing process during Strombolian activity; which we explore by interpreting our gas measurements in tandem with the melt inclusion record of pre-eruptive dissolved volatile abundances, and with the results of an equilibrium saturation model. Comparison between natural (volcanic gas and melt inclusion) and modelled compositions is used to propose a degassing mechanism for Stromboli volcano, which suggests surface gas discharges are mixtures of CO2-rich gas bubbles supplied from the deep (> 4 km) plumbing system, and gases released from degassing of dissolved volatiles in the magma filling the upper conduits. The proposed mixing mechanism offers a viable and general model to account for composition of gas discharges at all volcanoes for which petrologic evidence of CO2 fluxing exists. A combined volcanic gas-melt inclusion-modelling approach, as used in this paper, provides key constraints on degassing processes, and should thus be pursued further.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
EPSL_Aiuppa_etal_2010.pdf1.03 MBAdobe PDFView/Open    Request a copy
Show full item record

Page view(s)

78
checked on Apr 22, 2017

Download(s)

26
checked on Apr 22, 2017

Google ScholarTM

Check

Altmetric