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Authors: Acocella, V.*
Neri, M.*
Sulpizio, R.*
Title: Dike propagation within active central volcanic edifices: constraints from Somma-Vesuvius, Etna and analogue models
Title of journal: Bulletin of Volcanology
Series/Report no.: / (2008)
Publisher: Springer Berlin / Heidelberg
Issue Date: 2008
DOI: 10.1007/s00445-008-0258-2
Keywords: dike
analogue models
Abstract: Dikes within stratovolcanoes are commonly expected to have radial patterns. However, other patterns may also be also found, due to regional stresses, magmatic reservoirs, topographic variations. Here we investigate dike patterns within volcanic edifices, by studying dike and fissure complexes at Somma-Vesuvius and Etna (Italy) and using analogue models. At the surface, the dikes and fissures show a radial configuration. At depths of tens to several hundreds of m, in areas exposed by erosion, tangential and oblique dikes are also present. Analogue models indicate that dikes approaching the flanks of cones, regardless of their initial orientation, reorient to become radial (parallel to the maximum gravitational stress). This reorientation is a significant process in shallow magma migration and may also control the emplacement of dike-fed fissures reaching the lower slopes of the volcano.
Appears in Collections:Papers Published / Papers in press
04.01.02. Geological and geophysical evidences of deep processes
04.04.99. General or miscellaneous
04.04.09. Structural geology
04.07.99. General or miscellaneous
04.07.07. Tectonics
04.08.99. General or miscellaneous
04.08.03. Magmas
04.08.04. Thermodynamics
04.08.06. Volcano monitoring
04.08.08. Volcanic risk
05.02.03. Volcanic eruptions

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