Naslov
Evolution of the alpine Venetian foredeep along the Schio-Vicenza Fault System by seismic sections analysis

Autori
Ricciato, Angelo ; Pola, Marco ; Fantoni, Roberto ; Zampieri, Dario

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Epitome, 4 / - , 2011, 149-149

Skup
8° Forum Italiano di Scienze della Terra

Mjesto i datum
Torino, Italija, 19.09.2011. - 23.09.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
South Alpine ; Schio-Vicenza fault system ; Veneto foredeep ; flexure

Sažetak
The aim of this work is to show how and when the NW-trending Schio-Vicenza fault system (SVFS) acted during the South-Alpine deformation in the Veneto plain. The SVFS is an inherited Mesozoic to Paleogene extensional feature currently bordering to the west the Venetian foredeep. During the Neogene development of the foredeep, the SVFS was reactivated with sinistral transtensional kinematics, which vertical component of the offset should increase moving towards the chain. The ENI database (2D seismic sections and wells) was used to map the SVFS. About 1000 km of seismic lines were interpreted and more than 10wells were used to calibrate the seismic interpretation. Some selected seismic sections, sub-orthogonal to the main faults, were chosen to obtain geological cross-sections through depth conversion process. This phase involved the tracking and interpretation of the most important spotlights that previously have been recognized in the sections. Moreover, more sections were used to map the hanging wall cut-off of the faults related to the Messinian unconformity. The collected data display a complex buried fault system that extends southward with a NNW trend until the Po delta. In the cross sections the faults (most of them NE dipping) show a vertical component with down-throw in its eastern side (hanging wall block). The fault system cumulative displacement decreases from the northwest (Schio area, where the fault crops out) to the southeast (Po delta). The main displacement occurred from Early to Middle Pliocene. The results confirm that the SVFS acted as a kinematic transfer of the Neogene shortening between the South Alpine front and the innermost Giudicarie front. In this context, the SVFS tract corresponding to the western border of the Venetian foredeep accommodated the subsidence induced by the foreland flexure with a prominent throw gradient increasing moving northwards.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Rudarstvo, nafta i geološko inženjerstvo

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