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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9348

Authors: Nicolosi, I.*
D’Ajello Caracciolo, F.*
Branca, S.*
Ventura, G.*
Chiappini, M.*
Title: Volcanic conduit migration over an active basement landslide at Mount Etna (Italy)
Title of journal: Scientific Reports
Series/Report no.: /4(2014)
Issue Date: 13-Jun-2014
DOI: 10.1038/srep05293
Keywords: Etna
Abstract: The flanks of volcanoes may slide in response to the loading of the edifice on a weak basement, magma push, and/or to tectonic stress. However, examples of stratovolcanoes emplaced on active landslides are lacking and the possible effects on the volcano dynamics unknown. Here, we use aeromagnetic data to construct a three-dimensional model of the clay-rich basement of Etna volcano (Italy). We provide evidence for a large stratovolcano growing on a pre-existing basement landslide and show that the eastern Etna flank, which slides toward the sea irrespective of volcanic activity, moves coherently with the underlying landslide. The filling of the landslide depression by lava flows through time allows the formation of a stiffness barrier, which is responsible for the long-term migration of the magma pathways from the coast to the present-day Etna summit. These unexpected results provide a new interpretation clue on the causes of the volcanic instability processes and of the mechanisms of deflection and migration of volcanic conduits.
Appears in Collections:04.05.99. General or miscellaneous
Papers Published / Papers in press

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