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Hydrogeological insights at Stromboli volcano (Italy) from geoelectrical, temperature and CO2 soil degassing investigations
Author(s)
Language
English
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/ 33 (2006)
Publisher
Agu
Pages (printed)
L17304
Issued date
2006
Keywords
Abstract
Finding the geometry of aquifers in an active volcano is
important for evaluating the hazards associated with phreatomagmatic
phenomena and incidentally to address the
problem of water supply. A combination of electrical
resistivity tomography (ERT), self-potential, CO2, and
temperature measurements provides insights about the
location and pattern of ground water flow at Stromboli
volcano. The measurements were conducted along a NE-SW
profile across the island from Scari to Ginostra, crossing the
summit (Pizzo) area. ERT data (electrode spacing 20 m,
depth of penetration of 200 m) shows the shallow
architecture through the distribution of the resistivities. The
hydrothermal system is characterized by low values of the
resistivity (<50 W m) while the surrounding rocks are
resistive (>2000 W m) except on the North-East flank of
the volcano where a cold aquifer is detected at a depth of
80 m (resistivity in the range 70–300 W m). CO2 and
temperature measurements corroborate the delineation of the
hydrothermal body in the summit part of the volcano while a
negative self-potential anomaly underlines the position of
the cold aquifer.
important for evaluating the hazards associated with phreatomagmatic
phenomena and incidentally to address the
problem of water supply. A combination of electrical
resistivity tomography (ERT), self-potential, CO2, and
temperature measurements provides insights about the
location and pattern of ground water flow at Stromboli
volcano. The measurements were conducted along a NE-SW
profile across the island from Scari to Ginostra, crossing the
summit (Pizzo) area. ERT data (electrode spacing 20 m,
depth of penetration of 200 m) shows the shallow
architecture through the distribution of the resistivities. The
hydrothermal system is characterized by low values of the
resistivity (<50 W m) while the surrounding rocks are
resistive (>2000 W m) except on the North-East flank of
the volcano where a cold aquifer is detected at a depth of
80 m (resistivity in the range 70–300 W m). CO2 and
temperature measurements corroborate the delineation of the
hydrothermal body in the summit part of the volcano while a
negative self-potential anomaly underlines the position of
the cold aquifer.
References
Allard, P., J. Carbonnelle, N. Metrich, H. Loyer, and P. Zettwoog (1994),
Sulphur output and magma degassing budget of Stromboli volcano,
Nature, 368(6469), 326– 330.
Barberi, F., M. Rosi, and A. Sodi (1993), Volcanic hazard assessment at
Stromboli based on review of historical data, Acta Vulcanol., 3, 173– 187.
Chiodini, G., R. Cioni, M. Guidi, L. Marini, and B. Raco (1998), Soil CO2
flux measurements in volcanic and geothermal areas, Appl. Geochem.,
13, 543– 552.
Finizola, A., S. Sortino, J.-F. Le´nat, and M. Valenza (2002), Fluid circulation
at Stromboli volcano (Aeolian Islands, Italy) from self-potential and
CO2 surveys, J. Volcanol. Geotherm. Res., 116, 1– 18.
Finizola, A., S. Sortino, J.-F. Le´nat, M. Aubert, M. Ripepe, and M. Valenza
(2003), The summit hydrothermal system of Stromboli: New insights
from self-potential, temperature, CO2 and fumarolic fluid measurements—
Structural and monitoring implications, Bull. Volcanol., 65,
486– 504, doi:10.1007/s00445-003-0276-z.
Hornig-Kjarsgaard, I., J. Keller, U. Koberski, E. Stadlbauer, L. Francalanci,
and R. Lenhart (1993), Geology, stratigraphy and volcanological evolution
of the island of Stromboli, Aeolian arc, Italy, Acta Vulcanol., 3, 21–
68.
Keller, J., I. Hornig-Kjarsgaard, U. Koberski, E. Stadlbauer, and
R. Lenhart (1993), Geological map of the island of Stromboli, Acta
Vulcanol., 3, 3.
Loke, M. H., and R. D. Barker (1996), Rapid least-squares inversion of
apparent resistivity pseudosections by a quasi-Newton method, Geophys.
Prospect., 44, 131– 152.
Nappi, G., B. Capaccioni, F. Biagiotti, and O. Vaselli (1999), Upper pyroclastic
sequence of the Scari formation: A paroxistic eruption from
Stromboli volcano (Aeolian Island, Italy), Acta Vulcanol., 11, 259– 264.
Revil, A., V. Naudet, and J. D. Meunier (2004a), The hydroelectric problem
of porous rocks: Inversion of the water table from self-potential data,
Geophys. J. Int., 159, 435– 444.
Revil, A., A. Finizola, F. Sortino, and M. Ripepe (2004b), Geophysical
investigations at Stromboli volcano, Italy. Implications for ground water
flow, Geophys. J. Int., 157, 426– 440.
Revil, A., G. Saracco, and P. Labazuy (2003), The volcano-electric effect,
J. Geophys. Res., 108(B5), 2251, doi:10.1029/2002JB001835.
Revil, A., H. Schwaeger, L. M. Cathles, and P. Manhardt (1999), Streaming
potential in porous media. 2. Theory and application to geothermal systems,
J. Geophys. Res., 104(B9), 20,033–20,048.
Rittmann, A. (1931), Der Ausbruch des Stromboli am 11 September 1930,
Zeits. Vulkanol., 14, 47–77.
Rosi, M., A. Bertagnini, and P. Landi (2000), Onset of the persistent activity
at Stromboli volcano (Italy), Bull. Volcanol., 62, 294– 300.
Sulphur output and magma degassing budget of Stromboli volcano,
Nature, 368(6469), 326– 330.
Barberi, F., M. Rosi, and A. Sodi (1993), Volcanic hazard assessment at
Stromboli based on review of historical data, Acta Vulcanol., 3, 173– 187.
Chiodini, G., R. Cioni, M. Guidi, L. Marini, and B. Raco (1998), Soil CO2
flux measurements in volcanic and geothermal areas, Appl. Geochem.,
13, 543– 552.
Finizola, A., S. Sortino, J.-F. Le´nat, and M. Valenza (2002), Fluid circulation
at Stromboli volcano (Aeolian Islands, Italy) from self-potential and
CO2 surveys, J. Volcanol. Geotherm. Res., 116, 1– 18.
Finizola, A., S. Sortino, J.-F. Le´nat, M. Aubert, M. Ripepe, and M. Valenza
(2003), The summit hydrothermal system of Stromboli: New insights
from self-potential, temperature, CO2 and fumarolic fluid measurements—
Structural and monitoring implications, Bull. Volcanol., 65,
486– 504, doi:10.1007/s00445-003-0276-z.
Hornig-Kjarsgaard, I., J. Keller, U. Koberski, E. Stadlbauer, L. Francalanci,
and R. Lenhart (1993), Geology, stratigraphy and volcanological evolution
of the island of Stromboli, Aeolian arc, Italy, Acta Vulcanol., 3, 21–
68.
Keller, J., I. Hornig-Kjarsgaard, U. Koberski, E. Stadlbauer, and
R. Lenhart (1993), Geological map of the island of Stromboli, Acta
Vulcanol., 3, 3.
Loke, M. H., and R. D. Barker (1996), Rapid least-squares inversion of
apparent resistivity pseudosections by a quasi-Newton method, Geophys.
Prospect., 44, 131– 152.
Nappi, G., B. Capaccioni, F. Biagiotti, and O. Vaselli (1999), Upper pyroclastic
sequence of the Scari formation: A paroxistic eruption from
Stromboli volcano (Aeolian Island, Italy), Acta Vulcanol., 11, 259– 264.
Revil, A., V. Naudet, and J. D. Meunier (2004a), The hydroelectric problem
of porous rocks: Inversion of the water table from self-potential data,
Geophys. J. Int., 159, 435– 444.
Revil, A., A. Finizola, F. Sortino, and M. Ripepe (2004b), Geophysical
investigations at Stromboli volcano, Italy. Implications for ground water
flow, Geophys. J. Int., 157, 426– 440.
Revil, A., G. Saracco, and P. Labazuy (2003), The volcano-electric effect,
J. Geophys. Res., 108(B5), 2251, doi:10.1029/2002JB001835.
Revil, A., H. Schwaeger, L. M. Cathles, and P. Manhardt (1999), Streaming
potential in porous media. 2. Theory and application to geothermal systems,
J. Geophys. Res., 104(B9), 20,033–20,048.
Rittmann, A. (1931), Der Ausbruch des Stromboli am 11 September 1930,
Zeits. Vulkanol., 14, 47–77.
Rosi, M., A. Bertagnini, and P. Landi (2000), Onset of the persistent activity
at Stromboli volcano (Italy), Bull. Volcanol., 62, 294– 300.
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