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Authors: Cuffaro, M.* 
Riguzzi, F.* 
Scrocca, D.* 
Doglioni, C.* 
Title: Coexisting tectonic settings: the example of the southern Tyrrhenian Sea
Issue Date: 2011
Series/Report no.: 8/100 (2011)
DOI: 10.1007/s00531-010-0625-z
Keywords: Southern Tyrrhenian Sea
GPS-derived strain rate
Seismic reflection profiles
Coexisting tectonics
Subject Classification04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics 
Abstract: We performed geodetic strain rate analyses in southern Italy, using new GPS velocities. Two-dimensional strain and rotation rate fields were estimated and results show that most of the shortening is distributed in the northern Sicily offshore. Extension becomes more evident and comparable with shortening on the eastern side of the same margin, and greater in the eastern Sicily offshore. Principal shortening and extension rate axes are consistent with longterm geological features: seismic reflection profiles show both active compressive and extensional faults affecting Pleistocene strata. We show evidence for contemporaneous extension and transtension in the Cefalu` Basin. Combining geodetic data and geological features point to the coexistence of independent geodynamic processes, i.e., the active E–W backarc spreading in the hangingwall of the Apennines subduction zone and shortening along the southern margin of the Tyrrhenian backarc basin operated by the NNW-motion of Africa relative to Eurasia.
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