The geometrical and kinematic characterization of geological structures represents one of the main aims of field investigation carried out within deformed portions of the continental lithosphere. The Northern-Central Apennine of Italy is a fold-and- thrust belt whose development and evolution is commonly interpreted as due to the superposition of structures for- med at different times and with different kinematic character. The main deforma- tion stages, that took place in the Late Triassic-Present time interval, can be summarised as follows: i) a stage of continental rifting (Late Triassic); ii) a stage of oceaniza- tion, with opening and spreading of the Tethys Ocean (Ju- rassic); iii) a stage of ocean floor subduction (Cretaceous- Paleocene); iv) a stage of continental collision, with development of east-directed contractional structures that migrated towards the Adriatic foreland (Late Oligocene- Pliocene); v) a stage of late/post-orogenic extension that followed in the wake of orogenic contraction, migrating towards the Adriatic foreland with development of post- orogenic normal faults (Early Miocene-Present). In this paper, partly building on preliminary results anticipated elsewhere (e.g. see CENTAMORE & ROSSI, 2005, 2006), we first review the main features of the Northern-Central Apennine orogenic belt as inferred from a wide specialistic literature, with emphasis on the struc- tural geometry, and paying particular attention to the de- scription of structures formed during individual deforma- tion stages. We then raise the problem of an apparent paradox when investigating the kinematic behaviour of structures formed during the Cretaceous-Neogene time interval, i.e. of structures that are to be considered post- rifting, but yet pre-orogenic. A discussion focussed on these structures provides the basis for formulating an ori- ginal interpretation of the Cretaceous-Neogene geodyna- mic setting of the future Apennine orogenic belt.

Centamore, E., Rossi, D., Tavarnelli, E. (2007). Geometry and kinematics of Triassic-Recent structures in the Northern-Central Apennines: a review and an original working hypothesis. RENDICONTI DELLA SOCIETÀ GEOLOGICA ITALIANA, 2, 117-118.

Geometry and kinematics of Triassic-Recent structures in the Northern-Central Apennines: a review and an original working hypothesis

TAVARNELLI, E.
2007-01-01

Abstract

The geometrical and kinematic characterization of geological structures represents one of the main aims of field investigation carried out within deformed portions of the continental lithosphere. The Northern-Central Apennine of Italy is a fold-and- thrust belt whose development and evolution is commonly interpreted as due to the superposition of structures for- med at different times and with different kinematic character. The main deforma- tion stages, that took place in the Late Triassic-Present time interval, can be summarised as follows: i) a stage of continental rifting (Late Triassic); ii) a stage of oceaniza- tion, with opening and spreading of the Tethys Ocean (Ju- rassic); iii) a stage of ocean floor subduction (Cretaceous- Paleocene); iv) a stage of continental collision, with development of east-directed contractional structures that migrated towards the Adriatic foreland (Late Oligocene- Pliocene); v) a stage of late/post-orogenic extension that followed in the wake of orogenic contraction, migrating towards the Adriatic foreland with development of post- orogenic normal faults (Early Miocene-Present). In this paper, partly building on preliminary results anticipated elsewhere (e.g. see CENTAMORE & ROSSI, 2005, 2006), we first review the main features of the Northern-Central Apennine orogenic belt as inferred from a wide specialistic literature, with emphasis on the struc- tural geometry, and paying particular attention to the de- scription of structures formed during individual deforma- tion stages. We then raise the problem of an apparent paradox when investigating the kinematic behaviour of structures formed during the Cretaceous-Neogene time interval, i.e. of structures that are to be considered post- rifting, but yet pre-orogenic. A discussion focussed on these structures provides the basis for formulating an ori- ginal interpretation of the Cretaceous-Neogene geodyna- mic setting of the future Apennine orogenic belt.
2007
Centamore, E., Rossi, D., Tavarnelli, E. (2007). Geometry and kinematics of Triassic-Recent structures in the Northern-Central Apennines: a review and an original working hypothesis. RENDICONTI DELLA SOCIETÀ GEOLOGICA ITALIANA, 2, 117-118.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/398918