Publikationsdatum:
2024-05-09
Beschreibung:
In order to unravel the tectonic evolution of the north-central sector of the Sicily
Channel (Central Mediterranean), a seismo-stratigraphic analysis of single- and multichannel
seismic reflection profiles has been carried out. This allowed to identify, between
20 and 50 km offshore the central-southern coast of Sicily, a *80-km-long deformation
belt, characterized by a set of WNW–ESE to NW–SE fault segments showing a polyphasic
activity. Within this belt, we observed: i) Miocene normal faults reactivated during
Zanclean–Piacenzian time by dextral strike-slip motion, as a consequence of the Africa–
Europe convergence; ii) releasing and restraining bend geometries forming well-developed
pull-apart basins and compressive structures. In the central and western sectors of the belt,
we identified local transpressional reactivations of Piacenzian time, attested by well-defined
compressive features like push-up structures and fault-bend anticlines. The reconstruction
of timing and style of tectonic deformation suggest a strike-slip reactivation of
inherited normal faults and the local subsequent positive tectonic inversion, often documented
along oblique thrust ramps. This pattern represents a key for an improved
knowledge of the structural style of foreland fold-and-thrust belts propagating in a preexisting
extensional domain. With regard to active tectonics and seismic hazards, recent
GPS data and local seismicity events suggest that this deformation process could be still
active and accomplished through deep-buried structures; moreover, several normal faults
showing moderate displacements have been identified on top of the Madrepore Bank and
Malta High, offsetting the Late Quaternary deposits. Finally, inside the northern part of the Gela Basin, multiple slope failures, originated during Pleistocene by the further advancing of the Gela Nappe, reveal tectonically induced potential instability processes.
Beschreibung:
Published
Beschreibung:
233–251
Beschreibung:
2T. Tettonica attiva
Beschreibung:
JCR Journal
Beschreibung:
restricted
Schlagwort(e):
Seismic stratigraphy
;
Tectonic inversion
;
Strike-slip motion
;
Push-up structures
;
Compressive features
;
Sicily Channel
;
04. Solid Earth::04.04. Geology::04.04.09. Structural geology
Repository-Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Materialart:
article
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