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New insights into Mt. Vesuvius hydrothermal system and its dynamic based on a critical review of seismic tomography and geochemical features
Author(s)
Language
English
Obiettivo Specifico
3.6. Fisica del vulcanismo
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
4/56(2013)
Pages (printed)
S0444
Issued date
2013
Abstract
The seismic velocity and attenuation tomography images, calculated inverting
respectively P-wave travel times and amplitude spectra of local
VT quakes at Mt. Vesuvius have been reviewed and graphically represented
using a new software recently developed using Mathematica8TM.
The 3-D plots of the interpolated velocity and attenuation fields obtained
through this software evidence low-velocity volumes associated with high
attenuation anomalies in the depth range from about 1 km to 3 km below
the sea level. The heterogeneity in the distribution of the velocity and attenuation
values increases in the volume centred around the crater axis
and laterally extended about 4 km, where the geochemical interpretation
of the data from fumarole emissions reveals the presence of a hydrothermal
system with temperatures as high as 400-450°C roughly in the same
depth range (1.5 km to 4 km). The zone where the hydrothermal system
is space-confined possibly hosted the residual magma erupted by Mt. Vesuvius
during the recent eruptions, and is the site where most of the seismic
energy release has occurred since the last 1944 eruption.
respectively P-wave travel times and amplitude spectra of local
VT quakes at Mt. Vesuvius have been reviewed and graphically represented
using a new software recently developed using Mathematica8TM.
The 3-D plots of the interpolated velocity and attenuation fields obtained
through this software evidence low-velocity volumes associated with high
attenuation anomalies in the depth range from about 1 km to 3 km below
the sea level. The heterogeneity in the distribution of the velocity and attenuation
values increases in the volume centred around the crater axis
and laterally extended about 4 km, where the geochemical interpretation
of the data from fumarole emissions reveals the presence of a hydrothermal
system with temperatures as high as 400-450°C roughly in the same
depth range (1.5 km to 4 km). The zone where the hydrothermal system
is space-confined possibly hosted the residual magma erupted by Mt. Vesuvius
during the recent eruptions, and is the site where most of the seismic
energy release has occurred since the last 1944 eruption.
Sponsors
This work has been partially supported
by the following projects: V2-“Precursori di Eruzioni in Vulcani
Quiescenti: Campi Flegrei e Vulcano”. Convenzione INGV-DPC
(2012-2013); EPHESTOS CGL2011-2949-C02-01 (University of
Granada, Instituto Andaluz de Geofísica); MEDiterranean SUpersite
Volcanoes (MED-SUV) FP7 ENV.2012.6.4-2 Grant agreement
no. 308665. (European Community).
by the following projects: V2-“Precursori di Eruzioni in Vulcani
Quiescenti: Campi Flegrei e Vulcano”. Convenzione INGV-DPC
(2012-2013); EPHESTOS CGL2011-2949-C02-01 (University of
Granada, Instituto Andaluz de Geofísica); MEDiterranean SUpersite
Volcanoes (MED-SUV) FP7 ENV.2012.6.4-2 Grant agreement
no. 308665. (European Community).
Type
article
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ANNALS OF GEOPHYSICS 2013 Del Pezzo56-1.pdf
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