Active upper crust deformation pattern along the southern edge of the Tyrrhenian subduction zone (NE Sicily): Insights from a multidisciplinary approach

Seismogenic stress field estimation in the Calabrian Arc region (south Italy) from a Bayesian approach

“…Box 8, in fact, is characterized by a σ 1 less steep than those detected for sectors 4 and 5. This reflects a mainly extensional stress pattern with a minor component of dextral strike‐slip kinematics possibly due to local transition between collisional domains 9 and 11 and rollback‐induced extension of sectors 4 and 5 [ Presti et al , ; Palano et al , ].…”

“…Plate convergence rate has been evaluated to be currently ~5 mm/yr [see Nocquet , ; Palano et al , ], while subduction trench retreat has been progressively decreasing in the last million years until reaching at present time values as small as 2 mm/yr [e.g., D ' Agostino et al , ]. The very slow trench retreat of the remnant subducting slab inside a continental plate advancing slightly faster toward northwest probably led to a nonuniform advancement of the Ionian lithosphere margin [ Palano et al , ].…”

Magma Plumbing System at a Young Back‐Arc Spreading Center: The Marsili Volcano, Southern Tyrrhenian Sea

“…Evidence from surface geology and geophysics (Baccheschi et al, 2011;Civello & Margheriti, 2004;Palano et al, 2015Palano et al, , 2017 show that the back-arc continues to be an active site of magma production, notwithstanding an indication of slowing spreading rates since the Pleistocene, from 3.4 to 1.8 cm yr 21 (Cocchi et al, 2009). In contrast to the gradual slowing of spreading, Nicolosi et al (2006) suggest a pulse of very fast spreading (17cm yr 21 ) lasting between 1.6 and 2 Ma, followed by renewed but slower opening since 0.78 Ma.…”

Surface imprint of toroidal flow at retreating slab edges: The first geodetic evidence in the Calabrian subduction system

“…See legend for earthquake depth and magnitude. The dashed lines mark the tear faults proposed by previous investigators relative to the latest stages of the rollback process: (1) a shear zone spatially overlapping with the Pollino fault and the Amendolara Ridge, (2) the Malta Escarpment [ Govers and Wortel , ]; (3) the Sangineto line and (4) the Taormina line [ Rosenbaum et al ., ]; (5) a fault system cutting NE Sicily and the accretionary wedge ~50 km east of the Malta Escarpment [e.g., Gallais et al ., ]; (6) a N‐NW oriented deformation belt extending from the Alfeo Seamount to the central Aeolian Islands [ Argnani , ]; and (7) a ~400 km long shear zone, including both the Aeolian‐Tindari‐Letojanni fault system and the Ionian fault [ Palano et al ., ]. The yellow lines contour the Calabrian slab ( P wave velocity anomaly +0.8%) at 50, 100, and 150 km depth [ Piromallo and Morelli , ].…”

“…, Orecchio et al ., ; Chiarabba et al ., ]. Tearing at the southern edge is ascribed to distinct lithospheric structures (Figure a): the Taormina line in NE Sicily [ Rosenbaum et al ., ]; the Malta Escarpment, close to the eastern Sicily offshore [ Govers and Wortel , , and references therein]; a NNW oriented 20–30 km wide deformation zone extending from the Alfeo Seamount (Ionian basin) up to the central Aeolian Islands [ Argnani , ]; along a 200 km long crustal‐scale fault system cutting NE Sicily and crossing the accretionary wedge ~50 km east of the Malta Escarpment [ Gallais et al ., , and references therein], and along a ~400 km long multisegmented shear zone, including both the Aeolian‐Tindari‐Letojanni fault system and the Ionian fault [ Palano et al ., ].…”