32nd IGC - Florence, Italy (August 20-28, 2004)


Abstract title:
presenter's e-mail: d.scrocca@igag.cnr.it
1 - Istituto di Geologia Ambientale e Geoingegneria (IGAG - CNR)
     CROP Project keywords:
"CROP" website deep crust reflection seismics Italian Moho

The CROP Atlas represents the state-of-the-art of the CROP Project, the Italian deep crust exploration project, supported by the National Research Council (CNR) and by two leading companies in the energy sector (ENI and ENEL). This Project has been carried out thanks to the efforts of a large number of scientists. The publication of the CROP Atlas was one of the main goals of the present management, as a means of displaying and disseminating the wealth of data acquired by preceding committees. The seismic sections enclosed with this Atlas amount to about 10,000 km, over 8,740 km of which are off-shore and about 1,250 km on-shore, forming a network of regional seismic lines that cover the most prominent geological features of the Italian peninsula and the surrounding seas.
The seismic data presented in the CROP Atlas were acquired between 1986 and 1999. It also include profiles from ECORS-CROP project, carried out in co-operation with French colleagues, from the Central Alps, in co-operation with the Swiss NRP20, and from the very recent TRANSALP project, jointly developed with Austria and Germany. Generally, the seismic line shown is the stack version, but in a few cases the migrated version is also available (CROP-03, CROP-18 and TRANSALP).
The CROP Atlas was planned when most of the scheduled seismic reflection profiles had already been acquired. The first processing of the data has now been completed, but several lines might need to be reprocessed. The geological interpretation started several years ago and is still ongoing.
Interpretable seismic signals can be recognised down to 9-10 s TWT or more, well below the usual limit of previously acquired seismic data. Moreover, thanks to their regional extent, the CROP profiles can provide a valid background to properly frame the interpretation of commercial seismic lines.
The CROP seismic profiles provide new valuable information on the structure and tectonic evolution of the Italian region as, for instance:
- seismic images of the Moho discontinuity, both in the continental and oceanic domains (e.g. in the Alps or in the Tyrrhenian and Adriatic Seas);
- insights to constrain the deep structure of the Alps and Apennines;
- stratigraphic and structural setting of the pre-Norian sedimentary successions (e.g. in the Adriatic Sea).

ACCEPTED as Oral Presentation
in session: "S02.01 - CROP - Deep Seismic Soundings in the Italian Area"