This study provides new data and a reappraisal of the literature concerning the uppermost Cretaceous-Paleogene stratigraphy, biostratigraphy, tectonics and magmatism in the southern Apennines, with the aim of demonstrating the occurrence of an Albian to Paleogene abortive rifting stage in the southern Adria domain. This interval marks an important discontinuity in the tectono-stratigraphic evolution primarily recorded by coeval uplift and drowning of different sectors of the Apennine and Apulian Platforms, which locally produced a change in the paleoenvironment, from shallow-water platform to slope and basin facies deposits or the development of thick bauxitic levels. Contemporaneously, in the surrounding basins a large amount of calciclastic sediments was deposited, testifying for an increased sediment supply from the emerging sectors of the carbonate platforms. This time interval was also characterized by the occurrence of anorogenic magmatism and syn-sedimentary extensional faulting that, together with the changed sedimentary facies distribution, point out for a crustal-scale extensional tectonics. Timing, distance from the actively growing eastern Alps and, above all, orientation of extensional structures and synchronous anorogenic magmatism poorly fit with a peripheral bulge stage related with the first pulses of the Alpine collision. We propose an alternative model where such an event is the result of a rifting episode, characterized by limited anorogenic magmatism, starting in the Albian and reaching its climax in the uppermost Cretaceous-Eocene times. In the proposed tectonic scenario the extensional tectonics recorded in several sectors of the Adria domain was synchronous with that affecting the Hyblean (Sicily), Pelagian (Tunisia) and Sirte Basin Province Rift (Libya) to the south and was part of a single abortive rift system, which extended from the Sirte Basin up to the southern margin of the Thetyan Ocean to the NW.
The Cretaceous-Paleogene Abortive Rift in the southern Adria domain (southern Apennines, Italy) / Vitale, Stefano; Amore, F. O.; Ciarcia, S.; Fedele, Lorenzo; Grifa, C.; Prinzi, ERNESTO PAOLO; Tavani, Stefano; Tramparulo, FRANCESCO D'ASSISI. - Volume 40, Supplemento n. 1:(2016), p. 204. (Intervento presentato al convegno Geosciences on a changing planet: learning from the past, exploring the future - 88° Congresso della Società Geologica Italiana, Napoli 7-9 Settembre 2016).
The Cretaceous-Paleogene Abortive Rift in the southern Adria domain (southern Apennines, Italy)
VITALE, STEFANO;FEDELE, LORENZO;PRINZI, ERNESTO PAOLO;TAVANI, STEFANO;TRAMPARULO, FRANCESCO D'ASSISI
2016
Abstract
This study provides new data and a reappraisal of the literature concerning the uppermost Cretaceous-Paleogene stratigraphy, biostratigraphy, tectonics and magmatism in the southern Apennines, with the aim of demonstrating the occurrence of an Albian to Paleogene abortive rifting stage in the southern Adria domain. This interval marks an important discontinuity in the tectono-stratigraphic evolution primarily recorded by coeval uplift and drowning of different sectors of the Apennine and Apulian Platforms, which locally produced a change in the paleoenvironment, from shallow-water platform to slope and basin facies deposits or the development of thick bauxitic levels. Contemporaneously, in the surrounding basins a large amount of calciclastic sediments was deposited, testifying for an increased sediment supply from the emerging sectors of the carbonate platforms. This time interval was also characterized by the occurrence of anorogenic magmatism and syn-sedimentary extensional faulting that, together with the changed sedimentary facies distribution, point out for a crustal-scale extensional tectonics. Timing, distance from the actively growing eastern Alps and, above all, orientation of extensional structures and synchronous anorogenic magmatism poorly fit with a peripheral bulge stage related with the first pulses of the Alpine collision. We propose an alternative model where such an event is the result of a rifting episode, characterized by limited anorogenic magmatism, starting in the Albian and reaching its climax in the uppermost Cretaceous-Eocene times. In the proposed tectonic scenario the extensional tectonics recorded in several sectors of the Adria domain was synchronous with that affecting the Hyblean (Sicily), Pelagian (Tunisia) and Sirte Basin Province Rift (Libya) to the south and was part of a single abortive rift system, which extended from the Sirte Basin up to the southern margin of the Thetyan Ocean to the NW.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
