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Authors: Carlino, S.*
Cubellis, E.*
Luongo, G.*
Obrizzo, F.*
Title: On the mechanics of caldera resurgence of Ischia Island (southern Italy)
Title of journal: Mechanisms of Activity and Unrest at large Calderas Geological Society ,London, Special Pubblications
Series/Report no.: Special Pubblications/269 (2006)
Publisher: Geological Society ,London
Issue Date: 2006
Keywords: NONE
Abstract: A model of caldera resurgence was applied to the Island of Ischia to explain uplift, volcanic activity and tectonics on Mount Epomeo, as well as historical seismicity and slow ground movements recorded for the past 2000 years. A two-dimensional mechanical model was utilized for the crust, which was considered to be an elastic plate overlying a laccolith. Geometric dimensions and mechanical parameters were constrained using geological, geophysical and geochemical data. We propose that a laccolith, with a diameter L of c. 10 km, and a depth of up to 1 km in the centre of the island, triggered the caldera resurgence after the Mount Epomeo Green Tuff eruption forming the caldera (55 000 a BP). A bending phase and a punched laccolith phase are thought to have caused the observed deformations in the caldera. These processes control the tectonics at the boundary of the Mount Epomeo resurgent structure, volcanic activity and dynamics of the island.
Appears in Collections:04.08.99. General or miscellaneous
Papers Published / Papers in press

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