10.7892/BORIS.112368
Revil, André
André
Revil
Finizola, Anthony
Anthony
Finizola
Ricci, Tulio
Tulio
Ricci
Delcher, Eric
Eric
Delcher
Peltier, Aline
Aline
Peltier
Barde-Cabusson, Stéphanie
Stéphanie
Barde-Cabusson
Avard, Geoffroy
Geoffroy
Avard
Bailly, Thibault
Thibault
Bailly
Bennati, Laura
Laura
Bennati
Byrdina, Svetlana
Svetlana
Byrdina
Colonge, Julien
Julien
Colonge
Di Gandi, F
F
Di Gandi
Douillet, Guilhem Amin
Guilhem Amin
Douillet
Lupi, Matteo
Matteo
Lupi
Letort, Jean
Jean
Letort
Tsang-Hin-Sun, Ève
Ève
Tsang-Hin-Sun
Hydrogeology of Stromboli volcano, Aeolian Islands (Italy) from the interpretation of resistivity tomograms, self-potential, soil temperature and soil CO2 concentration measurements.
Blackwell Science
2011
ScholarlyArticle
550 Earth sciences & geology
2011-07-19
2011
en
application/pdf
info:eu-repo/semantics/openAccess
To gain a better insight of the hydrogeology and the location of the main tectonic faults of Stromboli volcano in Italy, we collected electrical resistivity measurements, soil CO2 concentrations, temperature and self-potential measurements along two profiles. These two profiles started at the village of Ginostra in the southwest part of the island. The first profile (4.8 km in length) ended up at the village of Scari in the north east part of the volcano and the second one (3.5 km in length) at Forgia Vecchia beach, in the eastern part of the island. These data were used to provide insights regarding the position of shallow aquifers and the extension of the hydrothermal system. This large-scale study is complemented by two high-resolution studies, one at the Pizzo area (near the active vents) and one at Rina Grande where flank collapse areas can be observed. The Pizzo corresponds to one of the main degassing structure of the hydrothermal system. The main degassing area is localized along a higher permeability area corresponding to the head of the gliding plane of the Rina Grande sector collapse. We found that the self-potential data reveal the position of an aquifer above the villages of Scari and San Vincenzo. We provide an estimate of the depth of this aquifer from these data. The lateral extension of the hydrothermal system (resistivity ∼15–60 ohm m) is broader than anticipated extending in the direction of the villages of Scari and San Vincenzo (in agreement with temperature data recorded in shallow wells). The lateral extension of the hydrothermal system reaches the lower third of the Rina Grande sector collapse area in the eastern part of the island. The hydrothermal body in this area is blocked by an old collapse boundary. This position of the hydrothermal body is consistent with low values of the magnetization (<2.5 A m−1) from previously published work. The presence of the hydrothermal body below Rina Grande raises questions about the mechanical stability of this flank of the edifice.