New insights in the geodynamics of the Lipari–Vulcano area (Aeolian Archipelago, southern Italy) from geological, geodetic and seismological data

摘要: Abstract Geological, geodetic and seismological data have been analyzed in order to frame the Lipari–Vulcano complex (Aeolian archipelago, southern Italy) into geodynamic context of southeastern Tyrrhenian Sea. It is located at northern end a major NNW–SSE trending right-lateral strike-slip fault system named “Aeolian–Tindari–Letojanni” which has interpreted as lithospheric discontinuity extending from Aeolian Islands Ionian coast Sicily separating two different tectonic domains: contractional one west an extensional north-east. Structural field consist structural measurements performed on well-exposed planes fractures. The mesostructures are mostly represented by NW–SE striking normal faults with dextral-oblique component motion. Minor structures N–S oriented joints tension gashes widespread over whole area particularly along fumarolized sectors. dataset (from 1994 2013) based earthquakes magnitude ranging between 1.0 4.8. hypocenter distribution depicts alignments corresponding Aeolian–Tindari–Letojanni WNW–ESE Sisifo–Alicudi system. GPS analysis displays ∼3.0 mm/yr active shortening islands, maximum rate about 1.0 × 10 −13  s −1 , La Fossa Caldera south Vulcanello. This region bounded north where values shear strain rates, 0.7 × 10 observed. change occurs Vulcanello that also characterized transition way vertical axis rotation. Moreover, both islands show clear subsidence process, suggested negative velocities all stations exhibit decrease −15 −7 mm/yr south. New suggest current kinematics can be framed eastward migrating dominated transpressive tectonics minor coexist