Teleseismic tomography of the Campanian volcanic area and surrounding Apenninic Belt

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doi: 10.1016/S0377-0273(00)00304-8
Authors:De Gori, P.; Cimini, G. B.; Chiarabba, C.; De Natale, Giuseppe; Troise, Claudia; Deschamps, A.
Author Affiliations:Primary:
Istituto Nazionale di Geofisica, Roma, Italy
University College London, United Kingdom
U. S. Geological Survey, United States
Osservatorio Vesuviano, Italy
Universita di Napoli "Federico II", Italy
CNRS, France
Volume Title:Mechanics and thermalfluid-dynamics of volcanic processes
Volume Authors:De Natale, Giuseppe, editor; Kilburn, Christopher; Chouet, Bernard A.
Source:Journal of Volcanology and Geothermal Research, 109(1-3), p.55-75; 1998 meeting of the European Geophysical Society, Nice, France, April 20-24, 1998, edited by Giuseppe De Natale, Christopher Kilburn and Bernard A. Chouet. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-0273
Publication Date:2001
Note:In English. 57 refs.; illus., incl. 1 table, geol. sketch maps
Summary:The three-dimensional P-velocity structure of the crust and upper mantle beneath the Vesuvius volcano and the surrounding Apenninic belt is derived by teleseismic tomography to describe the deep volcanic structure and its relationship with the Adriatic lithosphere subducting beneath the belt. The data consist of 1615 P and PKP travel times derived from 135 teleseismic events. We merged the data recorded by the stations of the Italian Seismic Network located on the southern Apennines with stations deployed in a temporary broad-band experiment around Vesuvius volcano (BROADVES). The traveltime residuals, computed with respect to the IASP91 1D reference model, are inverted using the ACH code. The 3D velocity structure shows a lower crust characterised by strong lateral heterogeneities with velocity perturbations ranging from -5 to +5%. In the lower crust along the Tyrrhenian margin, low-velocity anomalies are found beneath the volcanic complexes, suggesting the presence of deep crustal magmatic reservoirs. An almost continuous high-velocity body is reconstructed in the upper mantle beneath the Apenninic belt from 65 down to 285 km depth. This high-velocity anomaly is interpreted as the signature of the Adriatic lithosphere subducting westward toward the back-arc Tyrrhenian basin. The low-velocity anomaly in the crust beneath Vesuvius, located above the high-velocity zone dipping in the mantle, may indicate that magma is generated by the subducting slab and rises to lower crustal depths where it is stored. Abstract Copyright (2001) Elsevier, B.V.
Subjects:Arrival time; Body waves; Crust; Elastic waves; Geophysical methods; Geophysical profiles; Geophysical surveys; Heterogeneity; Lithosphere; Lower crust; Magma chambers; Magmas; Mantle; P-waves; Plate tectonics; Reflection methods; Seismic methods; Seismic profiles; Seismic waves; Seismograms; Slabs; Subduction; Surveys; Three-dimensional models; Tomography; Upper mantle; Velocity; Velocity structure; Volcanism; Volcanoes; Apennines; Campania Italy; Europe; Italy; Southern Europe; Vesuvius
Coordinates:N404900 N404900 E0142600 E0142600
Abstract Numbers:02M/2149
Record ID:2006009841
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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