Manzotti Paola, Bosse Valérie, Pitra Pavel, Robyr Martin, Schiavi Federica, Ballèvre Michel (2018), Exhumation rates in the Gran Paradiso Massif (Western Alps) constrained by in situ U-Th-Pb dating of accessory phases (monazite, allanite and xenotime), in Contributions to Mineralogy and Petrology
, 173(3), 24.
BallevreMichel, ManzottiPaola, Dal PiazGiorgio Vittorio (2018), Pre-Alpine (Variscan) inheritance: a key for the location of the future Valaisan ocean (Western Alps), in Tectonics
, 37, 786-817.
Manzotti Paola, Ballévre Michel (2017), Tectonic history of the Dent Blanche. Field guide of the Swiss Tectonic Studies Group (Valpelline, August 2016), in Geological Field Trips
, 9(1.2), 1-73.
Kunz Barbara, Manzotti Paola, von Niederhäusern Brigitte, Engi Martin, Giuntoli Francesco, Lanari Pierre (2017), Permian high temperature metamorphism in the Western Alps (NW Italy), in International Journal of Earth Sciences
Paola Manzotti, Michel Ballèvre, Giorgio Vittorio Dal Piaz (2017), Continental gabbros in the Dent Blanche Tectonic System (Western Alps): from the pre-Alpine crustal structure of the Adriatic palaeo-margin to the geometry of an alleged subduction interface., in Journal of the Geological Society, London
, 174, 541-556.
Manzotti Paola, Rubatto Daniela, Zucali Michele, El Korh Afifé, Cenki-Tok Bénédicte, Ballèvre Michel, Engi Martin (2017), Permian magmatism and metamorphism in the Dent Blanche nappe: constraints from field observations and geochronology, in Swiss Journal of Geosciences
, 111, 79-97.
The aim of this project is to improve our understanding of the dynamics of processes leading to mountain belts, using a quantitative approach to constrain key parameters like heating/cooling rates, and burial/exhumation rates. For this, we need very precise and reliable age data, that can be obtained by dating a mineral present in small amounts in many rocks i.e. monazite. This project will explore the behaviour of monazite in polycyclic rocks from the Western Alps and utilize the robust age data in orogenic analysis.The project will include the following main steps:-Characterizing monazite phase relations in rocks formed over a wide range of P-T conditions, with particular focus on the monazite behaviour at high pressure conditions;-Studying the exchange of Rare Earth Elements (REE) between monazite (and other accessory REE-phases) and major silicates in high-pressure / medium-temperature rocks;-Determining the survival mechanisms of monazite through successive orogenic cycles;-Deriving P-T paths for specific samples, selected for monazite geochronology-Dating monazite growth domains by Th-Pb and U-Pb isotopy, using LA-ICP-MS in situ analysis and SIMS (for particularly small monazite domains);-Relating monazite ages (i.e. time, t) to specific metamorphic stages for which pressure (P) and temperature (T) conditions have been estimated, thus constraining specific parts of the PTt-paths;-Testing the reliability of ages when several generations of monazite occur in a single rock sample;-Deriving quantitative estimates of the heating/cooling rates, burial/exhumation rates, and of the rates of displacement along crustal-scale thrusts, by the integration of the monazite ages with all the other age data, and the P-T-t paths constructed in this study.The aims of this project will be achieved using a multidisciplinary approach that combines geological fieldwork, petrological and microstructural analysis, in situ geochronology, and REE-geochemistry.In a more general and wider context, determining these parameters is of major importance as they serve as key constraints for numerical models that aim to simulate the thermo-mechanical evolution of mountains belts.