Publication Date:
2021-11-09
Description:
Stromboli volcano is characterized by a persistent strombolian activity thatwas interrupted by effusive eruptions
in 1985, 2002–2003, 2007, and 2014.
The considerable amount of soil CO2 flux data acquired by the continuous geochemical network installed in the
summit and peripheral areas of Stromboli Island have allowed us to thoroughly investigate and to model the
plumbing system. This study analyzed 16 years of soil CO2 fluxes from the summit area, which showed a wide
range of values (from 2000 to 85,000 g m−2 day−1). A set of discontinuous pCO2 data (ranging from 0.1 to
0.35 atm) from a dedicated thermal well (COA) drilled in the Stromboli village has been taken into account for
the peripheral degassing evaluation. One of the major accomplishments of this study is the confirmation of the
previous formulated geochemical model based on of the soil CO2 fluxes database and the recent effusive eruptions.
The analysis of soil summit degassing data recorded at the summit STR02 station throughout the monitoring
period (2000–2015) revealed that the log(CO2 flux) values conformed to a polimodal distribution with
different mean values of CO2 fluxes being recorded for each sub-period during the different effusive eruptions.
The three selected periods (2000–2004, 2005–2010, and 2011–2015) were characterized by considerable increases
in soil CO2 degassing coinciding with the periods of effusive eruptions, indicating volatiles overpressure
and disequilibrium of the volcanic system.
Moreover, the CO2 output evaluations based on soil CO2 fluxes and pCO2 values of thermal waters (COA), have
showed a long increasing trend both in the summit and peripheral areas. From 2007 to 2014, culminating in
the last effusive eruption (August–November 2014).
Description:
Published
Description:
69-84
Description:
3V. Proprietà dei magmi e dei prodotti vulcanici
Description:
6V. Pericolosità vulcanica e contributi alla stima del rischio
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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