The Rocca Busambra ridge in western Sicily is a shallow to pelagic Meso-Cenozoic carbonate structural unitof the Sicilian fold and thrust belt with a variety of tectono-sedimentary features. Palaeofaults, unconformities(buttress unconformity, onlap, downlap), a network of neptunian dykes with several infilling generations, severallarge hiatuses, different facies and lateral facies changes, and erosional submarine and subaerial surfaces areobserved.Detailed fieldwork and structural analyses have indicated the occurrence of fault planes with differentorientations. These data, combined with facies studies and physical-stratigraphy analyses, allow for thedistinction of different depositional regions. A lateral change from an open-marine carbonate platform with astepped fault margin (located in the westernmost sector) to a deeper basinal depositional setting in the east, inthe context of an upper slope scalloped margin and base-of-slope systems with talus breccias, is envisagedhere. Extensional to transtensional tectonic pulses punctuated the sedimentary evolution during Early Toarcian,Late Jurassic, Early Cretaceous, Late Cretaceous, and Early Miocene times. The collected data show that mostfault planes have preserved their original orientations throughout the reactivation processes. The reconstructedMeso-Cenozoic tectono-sedimentary evolution is closely related to the late syn-rift and post-rift tectonic evolutionof the Tethyan continental margin.
|Numero di pagine||1|
|Stato di pubblicazione||Published - 2011|