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Babbucci, D.
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- PublicationRestrictedPost-late miocene kinematics of the adria microplate: inferences from geological, geophysical and geodetic data(2006)
; ; ; ; ; ; ; ;Mantovani, E.; University of Siena, Italy ;Babbucci, D.; University of Siena, Italy ;Viti, M.; University of Siena, Italy ;Albarello, D.; University of Siena, Italy ;Mugnaioli, E.; University of Siena, Italy ;Cenni, N.; University of Bologna, Italy ;Casula, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia; ; ; ; ; ; The space-time distribution of deformation in the central Mediterranean area suggests that the Adriatic domain (Adria) has moved coherently w~thA frica up until the late Miocene and that, subsequently, it decoupled fiom Africa (Nubia) and undenvcnt a clockwise (CW) rotation with respect to Eurasia. This event was determined by the wcstward push of the Anatolian- Aegean-Balkan system, after its collision with the southern Adriatic continental domain. The CW rotation of the Adria microplate induced a strong compressional regime in the central Mediterranean region, which can account for the major tectonlc events that occurred in this zone since the late Miocene. These include the renewal of accretionary activity in the Apenninic belt, the opening of the central Tyrrhenian basin, the detachment of the lblean microplate from mainland Africa and the development of a major fracture in the northern Adriatic foreland. The CW rotation of the Adria plate came to an end around the late Pliocene-early Pleistocene due to the collision of the Adria continental domain with the Southern Apennines. After this event, Adria has undergone a slow CCW rotation with respect to Eurasia. This kinematic pattern during the last evolutionary phase is suggested by the distribution of Quaternary deformation in the peri-Adnatic zones, in particular the shortening recognized at the eastern (Dinarides-Hellenides) and northern (southern Eastern Alps) boundaries of Adria, and is consistent with the seismological and geodetic evidence in the Adriatic and peri-Adriatic regions. No significant recent deformation can be recognized between Adria and Africa, at the Plioccnc decoupling zone or at any other possible decoupling tectonic belt. This suggests no, or at most very littlc, rclative motion bctwcen thew two doma~ns during the Quaternary. Tlic possible implications of this last evidence on Nubia-Eurasia kinematics are discussed.203 34 - PublicationOpen AccessNubia-Eurasia kinematics: an alternative interpretation from Mediterranean and North Atlantic evidence(2007-06)
; ; ; ; ;Mantovani, E.; Dipartimento di Scienze della Terra, Università degli Studi di Siena, Italy ;Viti, M.; Dipartimento di Scienze della Terra, Università degli Studi di Siena, Italy ;Babbucci, D.; Dipartimento di Scienze della Terra, Università degli Studi di Siena, Italy ;Albarello, D.; Dipartimento di Scienze della Terra, Università degli Studi di Siena, Italy; ; ; It is argued that the Plio-Quaternary deformation pattern in the Mediterranean region is compatible with a SSWNNE convergence between Africa (Nubia) and Eurasia and that the significant difference between this kinematics and the one provided by global models (SSE-NNW convergence e.g., the NUVEL-1) may be due to the fact that those models interpret North Atlantic data by adopting an oversimplified two-plate configuration, which cannot account for the occurrence of significant seismotectonic activity inside the presumed Nubia and Eurasia blocks. It is shown that the adoption of a new plate configuration involving the Iberia and Morocco microplates, strongly suggested by geological and seismotectonic evidence, makes it possible to identify a kinematic model compatible within errors with the constraints recognized in the Mediterranean region and with the NUVEL-1 North Atlantic data set. Some considerations are made about why the present-day Nubia-Eurasia kinematic models inferred from geodetic observations are significantly different from long-term models, such as model NUVEL- 1 and the one proposed in this work.260 668 - PublicationOpen AccessTentative list of major deformation events in the Central-Eastern Mediterranean region since the middle Miocene(1997-06)
; ; ; ; ;Babbucci, D.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Tamburelli, C.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Mantovani, E.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Albarello, D.; Dipartimento di Scienze della Terra, Università di Siena, Italy; ; ; A list of major constraints to impose on evolutionary reconstructions of the Central-Eastern Mediterranean region for the middle Miocene period to the Present is proposed. Each constraint is constituted by a tentative description of the deformation and related tectonic regime which affected major active zones during each evolutionary phase. This information has been derived from the analysis of the available observations in the various branches of Earth Sciences, trying to select clearly recognized deformations, possibly supported by independent observations. The list here reported has been used to constrain the evolutionary reconstruction proposed by Mantovani et al.(1997).182 367 - PublicationOpen AccessPlate convergence, crustal delamination, extrusion tectonics and minimization of shortening work as main controlling factors of the recent Mediterranean deformation pattern(1997-06)
; ; ; ; ; ;Mantovani, E.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Albarello, D.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Tamburelli, C.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Babbucci, D.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Viti, M.; Dipartimento di Scienze della Terra, Università di Siena, Italy; ; ; ; It is argued that the time-space distribution of major post middle Miocene deformation events in the Central-Eastern Mediterranean region, deduced from the relevant literature, can be coherently explained as a consequence of the convergence between the Africa/Arabia and Eurasia blocks. This plate convergence has mainly been accommodated by the consumption of the thinnest parts of the Northern African (Ionian and Levantine basins) and peri-Adriatic margins. During each evolutionary phase the space distribution of trench zones is controlled by the basic physical requirement of minimizing the work of horizontal forces, induced by plate convergence, against the resisting forces, i.e., the cohesion of the upper brittle crustal layer and the buoyancy forces at the consuming boundaries. The significant changes of tectonic styles which determined the transition from one phase to the next, like those which occurred around the Messinian and the late Pliocene-early Pleistocene, were determined by the suture of consuming boundaries. When such an event occurs, the system must activate alternative consuming processes to accommodate the convergence of the major confining blocks. The observed deformations in the study area suggest that this tectonic reorganization mostly developed by the lateral extrusion of crustal wedges away from the sutured borders. This mechanism allowed the translation of maximum horizontal stresses from the locked collisional fronts to the zones where consumable lithosphere was still present, in order to activate the next consuming processes. The extensional episodes which led to the formation of basins and troughs in the Tyrrhenian and Aegean zones are interpreted as secondary effects of the outward escape of crustal wedges, like those which occurred in response to longitudinal compressional regimes in the Apennines and Aegean regions.324 1047 - PublicationOpen AccessNubia-Eurasia kinematics: an alternative interpretation from Mediterranean and North Atlantic evidence(2007-04-03T14:49:52Z)
; ; ; ; ;Mantovani, E.; Dipartimento di Scienze della Terra, Università degli Studi di Siena ;Viti, M.; Dipartimento di Scienze della Terra, Università degli Studi di Siena ;Babbucci, D.; Dipartimento di Scienze della Terra, Università degli Studi di Siena ;Albarello, D.; Dipartimento di Scienze della Terra, Università degli Studi di Siena; ; ; It is argued that the Plio-Quaternary deformation pattern in the Mediterranean region is compatible with a SSW-NNE convergence between Africa (Nubia) and Eurasia and that the significant difference between this kinematics and the one provided by global models (SSE-NNW convergence, e.g., the NUVEL-1) may be due to the fact that those models interpret North Atlantic data by adopting an oversimplified two-plate configuration, which cannot account for the occurrence of significant seismotectonic activity inside the presumed Nubia and Eurasia blocks. It is shown that the adoption of a new plate configuration involving the Iberia and Morocco microplates, strongly suggested by geological and seismotectonic evidence, makes it possible to identify a kinematic model compatible within errors with the constraints recognized in the Mediterranean region and with the NUVEL-1 North Atlantic data set. Some considerations are made about the reason why the present-day Nubia-Eurasia kinematic models inferred from geodetic observations are significantly different from long-term models, such as model NUVEL-1 and the one proposed in this work.210 471 - PublicationOpen AccessRecognizing the Italian zones most prone to next large earthquakes: possible approaches and present chances(1997-10)
; ; ; ; ;Mantovani, E.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Albarello, D.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Tamburelli, C.; Dipartimento di Scienze della Terra, Università di Siena, Italy ;Babbucci, D.; Dipartimento di Scienze della Terra, Università di Siena, Italy; ; ; The defense from earthquakes in Italy would be considerably favoured by knowing where the next strong shocks will most probably occur. However, to obtain this information a well-defined and widely accepted method is not yet available. This work discusses the approaches so far proposed and tries to estimate the relative chances of providing reliable indications on this problem. Particular attention focusses on the methodology based on the concept of «strain migration».139 139