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Author  |
Accaino,F; Catalano,R; Di Marzo,L; Giustiniani,M; Tinivella,U; Nicolich,R; Sulli,A; Valenti,V; Manetti,P |
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Abstract |
A crustal reflection seismic profile, more than 100 km long, was recorded across central Sicily, from the Tyrrhenian shore to the Sicily Channel, to understand the deep structures and the collision mechanisms between Europe and Africa and the subsequent geodynamic evolution. The profile was acquired using explosive sources and 240 active channels recorded by a Sercel 408-XL, 24 bits A/D converter, with a 12 km spread and a 24-fold coverage. The data were processed following a non-conventional procedure in order to preserve the relative amplitudes of the reflections and to better investigate the Sicily deep structures down to the Moho. The main highlighted structures are the dramatic flexure of the Iblean crust, the huge, deeper than expected, trough of Caltanissetta consisting of deep seated thrusts and nappes, and the imbricate thrust system of rigid bodies
characterizing the northern Maghrebian chain. We designed an ad hoc acquisition and processing in order to highlight these main geological features in the seismic stacked section. Moreover, the deepest parts of the Caltanissetta trough are imaged for the first time, and its bottom is now fixed at more than 7 s TWT. The
giant crustal wedge flexuring the Iblean foreland and the Moho geometries are examinated |
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Address |
Accaino, Giustiniani, Tinivella: Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante, 42/c, Sgonico, TS, Italy; Catalano, Sulli, Valenti: University of Palermo, Dipartimento di Geologia e Geodesia, Via Archirafi 22, PA, Italy; Marzo: Geotec SpA, Via G. Barbato, 20, CB, Italy; Nicolich: University of Trieste, Dipartimento di Ingegneria Civile e Ambientale, Via Valerio 10, TS, Italy; Manetti: C.N.R. Istituto di Geoscienze e Georisorse, Via Moruzzi, 1 PI, Italy |
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