GNGTS 2014 - Atti del 33° Convegno Nazionale

As pointed out in the introduction our project is essentially based on the use of gravimetric data set to compare the suitability of the different available crustal models, integrating both shallow and deep structures. We have dedicated a strong effort on using appropriate constraints in order to obtain reliable results to reduce the high degree of indetermination of the gravity interpretation. The first constraint used concerns a strong selection of density values for the formation involving in themodelling: after defining a stratigraphicmodel characterized by litho-mechanical layers, we calculated a density value for each layers on the base of P seismic velocities. These values were then compared with those present in literature. The second constraint regards the geometries of shallow and deep structures. In particular, the shallow section was built using the large amount of data coming from oil exploration and surface geology whereas several gravity models are performed to analyze the different depth estimation of Moho across the regional transect as inferred from teleseismic receiver functions and from the interpretation of seismic refraction study. Acknowledgement. We are thankful to ENI, which made available the original data points of gravity data and to Dott. Carlo Ungarelli, for helpful suggestion to improve this study. References Acocella V., 2000: Spacing accomodation during pluton emplacement . ����� ����� ���� ��� ���� �������� Terra Nova, Vol. 12, n.4, 149-155. Amato A., Biella G., Chiesa S., De Franco R., Malagnini L., Minelli G., Ponziani F., Vezzoli L.; 1994: Tuscania Pienza seismic rifraction profile, geophysical model and geological interpretation . Mem. Descr. Carta Geol. d’It XLIX, 23-36. Barberi F., Buonasorte G., Cioni R., Fiordelisi A., Foresi L., Iaccarino S., Laurenzi M.A., Sbrana A., Vernia L., Villa I.M.; 1994: Plio-Pleistocene geological evolution of the geothermal area of Tuscany and Latium . Mem. Descr. Carta Geol. d’It XLIX, 77-134. Barchi M., Pauselli C., Chiarabba C., Di Stefano R., Federico C & Minelli G., 2006: Crustal structure, tectonic evolution and seismogenesis in the Northern Apennines (Italy) . ���������� �� ��������� ������� � ���������� Bollettino di Geofisica Teorica e Applicata. Vol.47, n.2, 249-270. Barchi, M. (2010), The Neogene-Quaternary evolution of the Northern Apennines: Crustal structure, style of deformation and seismicity [online], J. Virtual Explor., 36, paper 11. Bernabini M., Di Bucci D., Orlando L., Parotto M. & Tozzi M., 1995: Gravimetric evidence of deep structure in mountain building: subducted Adriatic Crust beneath he Tyrrhenian Moho in Central Italy . Geodynamics Vol.21, N.3, 223-234. Brocher T., 2005: Empirical Relations between Elastic Wavespeeds and density in the Earth’s Crust . Bullettin of the Seismological Society of America, Vol. 95, N. 6, 2081-2092. Brogi A. and Liotta D., 2006: Understanding the crustal structures of southern Tuscany: The contribution of the CROP18 Project . Bollettino di Geofisica Teorica ed Applicata Vol. 47, n. 3, 421-423. Cannarate S., Monachesi G., Cattaneo M, AmatoA., Chiarabba C., 2013: Deep structure and tectonics of the northern- central Apennines as seen by regional-scale tomography and 3-D located earthquakes. Journal of Geophysical Research: Solid Earth. Research: Solid Earth, Volume 118, Issue 10, 5391–5403. Cassano E., Anelli L., Cappelli and La Torre P.; 1998 : Interpretation of Northern Apennine Magnetic and gravity data in relation to the profile Crop 03 . ���� ���� ����� ��� ��� ���� �������� Mem. Soc. Geol. It. Vol LII, 413-425. Di Filippo M. and Toro B., 1980: Analisi gravimetrica delle strutture geologiche del lazio meridionale . Geol. Rom. 19, 285-294. Ferri F., Porfidia B., Ventura R., 2006: Gravimetria: la banca dati ed il progetto di cartografia 1:250.000 del Dipartimento Difesa del Suolo - A.p.a.t. , Atti XXV Convegno GNGTS, 141-143. Larocchi L., Gualtieri L., Cassinis R., 1998: 2D lithosperic gravity modelling along the Crop 03 profile . Mem. Soc. Geol. It. Vol LII, 225-230. Ludwig W. J., Nafe J. E., Drake C. L., 1970: Seismic refraction, in The Sea . A. E. Maxwell (Editor), Vol. 4, Wiley- Interscience, New York, 53–84. Manzella A., Ruggeri G., Gianelli G. & Puxeddu M., 1998 : Pluton geothermal system of Southern Tuscany a review of the crustal models . Mem. Soc. Geol. It. Vol LII, 283-294. Marson I., Cernobori L., Nicolich R., Stoka M., Liotta D., Palmieri F., & Velicogna I., 1998: Crop 03 Profile: a geophysical analysis of data and results . Mem. Soc. Geol. It. Vol LII, 123-137. Mele G. and Sandvol E., 2003: Deep crustal beneath the Northern Apennines inferred from teleseimic receiver functions . Earth Planet. Sci. Lett., 211, 69-78. 156 GNGTS 2014 S essione 3.2