Application Of Gravity And Deep Dipole Geoelectrics In The Volcanic Area Of Mt Etna (Sicily)

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Journal Article: Application Of Gravity And Deep Dipole Geoelectrics In The Volcanic Area Of Mt Etna (Sicily)

Abstract
The structural pattern of the basement of the Mt. Etna volcano is studied by combining results from new gravity and deep dipole geoelectric field data. At first, the Bouguer map was separated into regional and residual contour maps by a 50 km cut-off wavelength. Then, by the geoelectric interpretation, N-S and E-W resistivity cross-sections were elaborated, which were used as guidelines for modelling gravity residuals. After observing a close correspondence between Bouguer anomalies and resistivity classes, by a trial-and-error adjustment to the relationship between resistivity and density, a 3-D block model of the basement was finally constructed, which consistently matched with both gravity and geoelectric information content. Two main conclusions emerged from the combined interpretation. The first is the presence of diffuse inhomogeneities in the upper portion of the basement, down to an average depth of 2 km below sea level, in contrast with the regularity of the explored underlying portion. The second is the absence of geophysical markers suggesting the existence of a large magmatic chamber, down to about 3 km below sea level.

Authors 
M. Loddo, D. Patella, R. Quarto, G. Ruina, A. Tramacere and G. Zito








Published Journal 
Journal of Volcanology and Geothermal Research, 1989





DOI 
Not Provided
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Citation

M. Loddo,D. Patella,R. Quarto,G. Ruina,A. Tramacere,G. Zito. 1989. Application Of Gravity And Deep Dipole Geoelectrics In The Volcanic Area Of Mt Etna (Sicily). Journal of Volcanology and Geothermal Research. (!) .