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Transition from Tyrrhenian Basin extension to collisional tectonics: Evidence of N-S compression during the recent Quaternary at Ustica (southern Tyrrhenian Sea, Italy)
Bousquet, J.-Cl.; Lanzafame, G. (1995). Transition from Tyrrhenian Basin extension to collisional tectonics: Evidence of N-S compression during the recent Quaternary at Ustica (southern Tyrrhenian Sea, Italy). C. r. Acad. sci., Sér. 2, Sci. terre planètes 321(9): 781-787
In: Comptes Rendus de l'Académie des Sciences. Série IIA. Sciences de la Terre et des Planètes = Earth and Planetary Science. Gauthiers-Villars: Paris. ISSN 1251-8050, more
Peer reviewed article  

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Keywords
    Quaternary; Sedimentary structures; Tectonics; Volcanic islands; Volcanism; MED, Italy, Sicily, Ustica I. [Marine Regions]; Marine

Authors  Top 
  • Bousquet, J.-Cl.
  • Lanzafame, G.

Abstract
    Compressive deformations (reverse and/or transcurrent faults from kilometre to metre scale, indicating N-S shortening) cut the Middle and Upper Quaternary volcanic and sedimentary terrains of Ustica. They followed an episode of extension that deformed the old volcanics of the base of the island. The alternation of extension and compression, probably repeated, is in agreement with the magmatic evolution of the island, and is then followed by a further extensive episode (NW-SE extension) and, finally, by the cessation of volcanic activity. This neotectonic evolution indicates the substitution between Sardinia and Sicily, of the Neogene tectonic extension, linked to the opening of the oceanic Tyrrhenian basin, by collisional tectonics.

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