Il bacino oligo-miocenico veneto-friulano: provenienze e paleogeografia

Massimiliano Zattin (*), Cristina Stefani (**) & Silvana Martin (***)
(*) Dipartimento di Scienze della Terra e Geologico-Ambientali, Università degli Studi di Bologna. E-mail: massimiliano.zattin@unibo.it (**) Dipartimento di Geoscienze, Università degli Studi di Padova. (***) Dipartimento di Scienze Chimiche, Fisiche e Naturali, Università dell'Insubria, Como.

Diachronous deformation and exhumation of the Dinaric, eastern Southern Alps, and Northern Apennine belts caused a complex pattern of sedimentation and dispersal in the Venetian-Friulian Basin. This basin, because of its peculiar position in respect of the surrounding belts, records the tectonic evolution of three different orogens over a time range of about 50 m.y. Growth and erosion of the three chains feeding the Venetian-Friulian Basin are here traced by combination of multiple analytical techniques. We examine the terrigenous and intrabasinal supply to the basin by using arenite petrography (gross composition, heavy minerals) and apatite fission-track analysis framed in an updated stratigraphy. On the basis of this approach, we present a schematic temporal and paleogeographic evolution of the Venetian-Friulian basin during the Oligo-Miocene.

Alpi Meridionali, composizione principale, paleogeografia, provenienza, tracce di fissione