GNGTS 2019 - Atti del 38° Convegno Nazionale

GNGTS 2019 S essione 1.4 239 Lardeaux J.-M.; 2014: Deciphering orogeny: a metamorphic perspective. Examples from European Alpine and Variscan belts. Part II: Variscan metamorphism in the French Massif Central – A review . Bull. Soc. géol. France, 185(5) , 281-310. Lardeaux J.-M., Schulmann K., Faure M., Janousek V., Lexa O., Skrzypek E., Edel J.B. and Stipska P.; 2014: The Moldanubian Zone in the French Massif Central, Vosges/Schwarzwald and Bohemian Massif revisited: differences and similarities . Geological Society of London, Special Publications, 405 , 7-44. Marotta A.M. and Spalla M.I.; 2007: Permian-Triassic high thermal regime in the Alps: Result of late Variscan collapse or continental rifting? Validation by numerical modeling. Tectonics, 26(4) , 1-30. Matte P.; 2001: The Variscan collage and orogeny (480-290 Ma) and the tectonic definition of the Armorica microplate: A review . Terra Nova, 13(2) , 122-128. Regorda A., Roda M., Marotta A.M. and Spalla M.I.; 2017: 2-D numerical study of hydrated wedge dynamics from subduction to post-collisional phases . Geophysical Journal International, 211 , 974-1000. Roda M., Regorda A., Spalla M.I. and Marotta A.M.; 2019: What drives Alpine Tethys opening? clues from the review of geological data and model predictions. Geological Journal, 54(4) , 2646-2664. Spalla M.I., Zanoni D., Marotta A.M., Rebay G., Roda M., Zucali M. and Gosso G.; 2014: The transition from Variscan collision to continental break-up in the Alps: Insights from the comparison between natural data and numerical model predictions. Geological Society, London, Special Publications, 405(1) , 363-400. von Raumer J. F., Stampfli G.M. and Bussy, F.; 2003: Gondwana-derived microcontinents – the constituents of the Variscan and Alpine collisional orogens . Tectnophysics, 365 , 7-22. GOCE BAYESIAN GRAVITY INVERSION FOR GEONEUTRINO EXPLOITATION AT JUNO L. Rossi 1 , V. Strati 2,3 1 Politecnico di Milano, Department of Civil and Environmental Engineering DICA, Milan, Italy 2 University of Ferrara, Department of Physics and Earth Sciences, Ferrara, Italy 3 INFN, Ferrara Section, Ferrara, Italy Introduction. While the geophysical structure of the Earth is quite well known, information on its composition relies on shallow drill cores and samples brought to the surface by volcanic eruptions. Breakthroughs in the field are expected from the interplay between Earth Science and Particle Physics, which are currently exploring the promising scenarios of the Earth spectrometry with atmospheric neutrino oscillations (Rott et al. , 2015) and geoneutrinos detection (Fiorentini et al. , 2007). Geoneutrinos are a unique probe of the inaccessible deep Earth: by measuring their flux and energy spectrum it is possible to infer the global amount, distribution and ratio of U and Th, essential ingredients for the discrimination among different bulk silicate Earth (BSE) compositional models. The recent measurements from Borexino (Italy) and KamLand (Japan) detectors are opening the way to multiple-sites geoneutrino studies aimed at distinguishing between the site- dependent crustal components (~75% of the signal) from the almost constant mantle component (~25% of the signal). Moreover, new geoneutrino measurements are highly awaited from the SNO+ detector (Canada) and from the Jiangmen Underground Neutrino Observatory (JUNO) experiment. However, to correctly discriminate the mantle contribution to the geoneutrino flux from the crustal one, geophysical and geochemical models in the surrounding of the detector are required. Currently, this task is mainly performed by exploiting global models, like CRUST 1.0, but site-specific models with local inputs can improve the accuracy of separation. The goal of this work is to build a 3D geophysical model of the 6° × 4° area centred at the location of the JUNO experiment, currently under construction in the Guangdong Province (South China), by exploiting GOCE gravity data integrated with some a-priori geological and geophysical knowledge by means of a Bayesian approach to gravity inversion (Mosegaard and Tarantola, 2002).