The roots of Mt. Vesuvius deduced from gravity anomalies

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doi: 10.1007/s007100170008
Authors:Cubellis, E.; Ferri, M.; Luongo, G.; Obrizzo, F.
Volume Title:Special issue on Mt. Somma-Vesuvius and volcanism of the Campanian Plain
Volume Authors:De Vivo, B., prefacer; Rolandi, G.
Source:Special issue on Mt. Somma-Vesuvius and volcanism of the Campanian Plain, prefaced by B. De Vivo and G. Rolandi. Mineralogy and Petrology, 73(1-3), p.23-38. Publisher: Springer-Verlag, Vienna, Austria. ISSN: 0930-0708
Publication Date:2001
Note:In English; strat. col., sects., 1 table, geol. sketch maps
Summary:The structures of the Somma-Vesuvius volcanic complex are modelled on the basis of the interpretation of gravity anomalies obtained from data available in the literature and acquired along a new profile along the coastline from Naples to Castellammare di Stabia. A marked gravity low was recognized in the E sector of Vesuvius; data interpretation was carried out along two profiles centred on the low gravity region in question: a first profile crossing the Vesuvius crater in direction WNW-ESE, and a second one in a NNE-SSW direction. The 21/2 D model obtained reveals a crustal structure characterized by sediments of 2.3 g/cm3 density, overlying bedrock with a density of 2.6 g/cm3. Near the volcanic system the model becomes more complex due to the presence of light sediments with a density of 2.1 g/cm3 overlying a body with a density of 2.4 g/cm3 which extends into depth. The latter is thought to be closely related to the zone of magma ascent developed along the volcanic axis. Along the coast, the volcanic component is reduced and the model shows that the layer with a density of 2.3 g/cm3 ranges in thickness from 0 to ∼ 3500 m. An additional body between 1500 and 3000 m with a density of 2.4 g/cm3 was considered in order to account for the slight rise in the residual anomaly in the area in the vicinity of Mt Vesuvius. The analysis of the gravity anomaly pattern coincides with the complex system of faults and fractures intersecting the carbonate basement and the volcanic area in question, which developed as a consequence of extensional processes at the continental edge of the Italian Peninsula due to the opening of the Tyrrhenian basin. These extensional tectonics have created favourable conditions for the collapse of the southwestern slope of Mt Vesuvius and the development of eruptive vents and cracks on its flanks. [H.P.B.]
Sections:Petrology
Subsections:Volcanology
Subjects:Borehole sections; Bouguer anomalies; Geophysical methods; Geophysical profiles; Geophysical surveys; Gravity anomalies; Gravity methods; Surveys; Volcanoes; Campania Italy; Europe; Italy; Southern Europe; Vesuvius
Coordinates:N404900 N404900 E0142600 E0142600
Abstract Numbers:02M/2164
Record ID:2003083525
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe
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