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46 results on '"Cavagna, Simona"'

11. Mid-Eocene giant slope failure (sedimentary mélanges) in the Ligurian accretionary wedge (NW Italy) and relationships with tectonics, global climate change and the dissociation of gas hydrates.

Author

Festa, Andrea, Cavagna, Simona, Barbero, Edoardo, Catanzariti, Rita, and Pini, Gian Andrea

Subjects
*CLIMATE change, *GAS hydrates, *ACCRETIONARY wedges (Geology), *ATMOSPHERIC methane, *MORPHOTECTONICS, *ANTICLINES
Abstract

Upper Lutetian–Bartonian sedimentary mélanges, corresponding to ancient mud-rich submarine mass transport deposits, are widely distributed over an area c. 300 km long and tens of kilometres wide along the exhumed outer part of the External Ligurian accretionary wedge in the Northern Apennines. The occurrence of methane-derived carbonate concretions (septarians) in a specific tectonostratigraphic position below these sedimentary mélanges allows us to document the relationships among a significant period of regional-scale slope failure, climate change (the Early and Mid-Eocene Optimum stages), the dissociation of gas hydrates and accretionary tectonics during the Ligurian Tectonic Phase (early–mid-Lutetian). The distribution of septarians at the core of thrust-related anticlines suggests that the dissociation of gas hydrates was triggered by accretionary tectonics rather than climate change. The different ages of slope failure emplacement and the formation of the septarians support the view that the dissociation of gas hydrates was not the most important trigger for slope failure. The latter occurred during a tectonic quiescence stage associated with a regressive depositional trend, and probably minor residual tectonic pulses, which followed the Ligurian Tectonic Phase, favouring the dynamic re-equilibrium of the External Ligurian accretionary wedge. Our findings provide useful information for a better understanding of the factors controlling giant slope failure events in modern accretionary settings, where they may cause tsunamis. [ABSTRACT FROM AUTHOR]

Published
2020
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12. A geo-cultural itinerary on the Monferrato Hills (Northwestern Italy)

Author

Ajassa, Roberto, Bonetto, SABRINA MARIA RITA, Cavagna, Simona, Cigolini, Corrado, Clari, P., Comina, Cesare, DELA PIERRE, Francesco, Destefanis, Enrico, Doglione, A., Forno, Maria Gabriella, Fratianni, Simona, Gattiglio, Marco, Lozar, Francesca, Mandrone, Giuseppe, Martire, Luca, Masciocco, Luciano, Pavia, Marco, Piana, F., and Toja, Maurizio

Published
2014

13. L'itinerario geologico dell’Alto Astigiano

Author

Ajassa, Roberto, Bonetto, SABRINA MARIA RITA, Cavagna, Simona, Cigolini, Corrado, Clari, Pierangelo, Comina, Cesare, DELA PIERRE, Francesco, Destefanis, Enrico, Doglione, A., Forno, Maria Gabriella, Fratianni, Simona, Gattiglio, Marco, Lozar, Francesca, Mandrone, Giuseppe, Martire, Luca, Masciocco, Luciano, Piana, F., and Toja, M.

Published
2013

18. Geological processes and their relation with human activities, exemplified in the hilly vineyard areas of central Piedmont (ProGeoPiemonte project - geothematic area 4)

Author

Ajassa, Roberto, Bonetto, SABRINA MARIA RITA, Cavagna, Simona, Cigolini, Corrado, Clari, Pierangelo, Comina, Cesare, DELA PIERRE, Francesco, Destefanis, Enrico, Forno, Maria Gabriella, Fratianni, Simona, Gattiglio, Marco, Lozar, Francesca, Mandrone, Giuseppe, Martire, Luca, Masciocco, Luciano, and Piana, F.

Published
2011

35. Censimento dei geositi del settore regionale collina di Torino e Monferrato

Author

Biancotti, Augusto, Bortolami, Giancarlo, Pavia, Giulio, Ajassa, Roberto, Cavagna, Simona, Clari, Pierangelo, Costamagna, Alberto, Damarco, P., DE LUCA, Domenico, DELA PIERRE, Francesco, De Petrini, G., Giardino, Marco, Masciocco, Luciano, Maia, F., Martire, Luca, Martinetto, Edoardo, Motta, Michele, Pavia, Marco, Ricci, B., and Rossetti, Piergiorgio

Subjects
Collina di Torino, Geositi, Piemonte centrale, Monferrato
Published
2004

39. Petrographical and geochemical characterization of Messinian carbonate facies in Tertiary Piedmont basin : constrains for late Miocene evolution of NW Italy

Author

Cavagna, Simona, Clari, Pier Angelo, Dela Pierre, Francesco, Irace, Andrea, and Festa, Andrea

Abstract

Cavagna Simona, Clari Pier Angelo, Dela Pierre Francesco, Irace Andrea, Festa Andrea. Petrographical and geochemical characterization of Messinian carbonate facies in Tertiary Piedmont basin : constrains for late Miocene evolution of NW Italy. In: Documents des Laboratoires de Géologie, Lyon, n°156, 2002. STRATI 2002. 3ème congrès français de stratigraphie. Lyon, 8-10 juillet 2002. pp. 66-67.

Published
2002

41. The Moncucco quarry : a key area to understand the Messinian evolution of the Torino Hill, tertiary Piemonte Basin, NW-Italy

Author

Irace, Andrea, Clari, Pier Angelo, Dela Pierre, Francesco, Bicchi, Erica, Cavagna, Simona, and Festa, Andrea

Abstract

Irace Andrea, Clari Pier Angelo, Dela Pierre Francesco, Bicchi Erica, Cavagna Simona, Festa Andrea. The Moncucco quarry : a key area to understand the Messinian evolution of the Torino Hill, tertiary Piemonte Basin, NW-Italy. In: Documents des Laboratoires de Géologie, Lyon, n°156, 2002. STRATI 2002. 3ème congrès français de stratigraphie. Lyon, 8-10 juillet 2002. pp. 131-132.

Published
2002

42. Il sistema alpino-appenninico nel Cenozoico. 81° Riunione estiva Soc. Geol. It., escursione pre-riunion

Author

Polino, R., Balestro, Gianni, Boano, P., Bicchi, E., Cadoppi, Paola, Cavagna, Simona, Clari, Pierangelo, D'Atri, Anna Raffaella, DELA PIERRE, Francesco, Ferrero, Elena, Festa, Andrea, Fioraso, G., Forno, Maria Gabriella, Gelati, R., Giardino, Marco, Gnaccolini, M., Irace, A., Malusà, M., Martin, S., Morelli, M., Mosca, P., Perello, P., Philippot, P., Piana, F., Ruffini, Raffaella, and Tallone, S.

Published
2002

44. The record of the Messinian salinity crisis in the Tertiary Piedmont Basin (NW Italy): The Alba section revisited

Author

Dela Pierre, Francesco, primary, Bernardi, Elisa, additional, Cavagna, Simona, additional, Clari, Pierangelo, additional, Gennari, Rocco, additional, Irace, Andrea, additional, Lozar, Francesca, additional, Lugli, Stefano, additional, Manzi, Vinicio, additional, Natalicchio, Marcello, additional, Roveri, Marco, additional, and Violanti, Donata, additional

Published
2011
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46. Structural anatomy of the Ligurian accretionary wedge (Monferrato, NW Italy), and evolution of superposed mélanges.

Author

Festa, Andrea, Dilek, Yildirim, Codegone, Giulia, Cavagna, Simona, and Pini, Gian Andrea

Subjects
*GEOLOGICAL formations, *THRUST faults (Geology), *SEDIMENTATION & deposition, *STRUCTURAL analysis (Engineering), *ACCRETIONARY wedges (Geology)
Abstract

We document in this study the internal structure of the Late Cretaceous-late Oligocene Ligurian accretionary wedge in northwestern Italy, and the occurrence in this exhumed wedge of broken formation and three different types of mélanges that formed sequentially through time. The broken formation is the oldest unit in the accretionary wedge and shows bedding-parallel boudinage structures, which developed as a result of layer-parallel extension at the toe of the internal part of the Alpine wedge front during the Late Cretaceous-middle Eocene. This broken formation experienced an overprint of tectonic, diapiric, and sedimentary processes as a result of continental collision in the late Oligocene. The NE-vergent thrusting and associated shortening produced a structurally ordered block-in-matrix fabric through mixing of both native and exotic blocks, forming the tectonic mélange. The concentration of overpressurized fluids along the thrust fault planes triggered the upward rise of shaly material, producing the diapiric mélange, which in turn provided the source material for the downslope emplacement of the youngest, late Oligocene sedimentary mélange. The sedimentary mélange units unconformably cover the collisional thrust faults, constraining the timing of both this episode of contractional deformation related to continental collision and the combination and overlap of tectonic, diapiric, and sedimentary processes. Our multiscale structural analysis of the Ligurian accretionary wedge shows that tectonic, diapiric, and sedimentary processes played a significant role in its evolution, and that the interplay between and the superposition of these different processes strongly controlled the dynamic equilibrium of the accretionary wedge in the NW Apennines-western Alps. This kind of polygenetic mélange development may be common in many modern and ancient accretionary complexes, and the processes involved in their formation are likely to be responsible for major tsunamic events in convergent margins. [ABSTRACT FROM AUTHOR]

Published
2013
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