Evolution of a section of the Africa-Europe plate boundary: Paleomagnetic and volcanological evidence from Sicily |
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| Authors: | F Barberi L Civetta P Gasparini F Innocenti R Scandone L Villari |
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| Institution: | 1. Istituto di Mineralogia e Petrografia, Universitàdi Pisa, Via S. Maria 53, Italy and C.N.R. Centro per la Minerogenesi, Petrogenesi e Tettogenesi dell''Appennino Centro-SettentrionaleItaly.;2. Istituto di Geologia e Geofisica, Universitàdi Napoli, Largo S. Marcellino 10,Italy.;3. Istituto di Geologia e Geofisica, Universitàdi Napoli, Largo S. Marcellino 10 Italy and Osservatorio Vesuviano, Ercolano, Napoli ,Italy.;4. Istituto di Mineralogia e Petrografia, Universitàdi Pisa, Via S. Maria 53, Italy and C.N.R. Centro per la Minerogenesi, Petrogenesi e Tettogenesi dell''Appennino Centro-SettentrionaleItaly.;5. Osservatorio Vesuviano, Ercolano, Napoli ,Italy.;6. C.N.R. Istituto Internazionale di Vulcanologia, Via R. Margherita 6, Catania ,Italy. |
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| Abstract: | New paleomagnetic data relative to Upper Cretaceous, Neogene and Quaternary volcanic rocks from eastern Sicily definitively indicate that Sicily is a part of the African plate, which collided with the European continental plate in Middle Miocene times. These data and the tectonic evolution of Sicily as inferred from the nature, age and distribution of volcanic products, are broadly consistent with the motions of Africa relative to Europe since the Upper Trias. During the Mesozoic, eastern Sicily was affected by extensional tectonics with associated alkali basaltic volcanism, and oceanic crust was produced in the meantime between the diverging African and European plates. Near the end of Mesozoic times the two plates started to converge with consequent consumption of oceanic crust. Different times of oceanic plate consumption along the Sicily-Calabria section of the plate boundary are suggested by the occurence of andesitic volcanism of different ages. The tectonic significance of late Tertiary to present basaltic activity in eastern Sicily is also discussed. |
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