Page 4 - Catalano_et_al_1996

294 R. Catalano et al./ Tectonophysics 260 (1996) 291-323

WELLS •oDREDGES

1. PAOLA EST 6. TRAPANI 11. LIPPONE 16. MARINEO 21. BIVONA 26. ONDA 31. OSCAR OA
2. NILDE 7. MOZIA 12. MISTRETTA 17. C.DA TRIGLIA 22. PLATANI 27. PINA 32. ORIONE
3. NADA 8. MARINELLA 13. PIZZO CASTELLARO 1B. CAMPOBELLO 23. ERACLEA 28. CORVINA ÀB +E
4. NARCISO 9. MENFI 14. ANGELO 19 SCIACCA 24. MANFRIA 29. MARAGONE
5. TANIA 10.LERCARA 15. VIZZINI 20. CIANCIANA 25. GELA 30. ARCHIMEDES e c +F

000 •••

c:liiA.

...22
.. 1~ •

1,5

..
..

Fig. 3. Grid zone C and G seismic reflection lines of Minister of lndustry of Italy and location map of dredge hauls (modified from
Antonelli et al., 1991) and commerciai borehole drills. Dredge symbols: A= Quaternary-Upper Miocene rocks and volcanics; B = Lower
Miocene-Oiigocene flysch; C= Eocene-Upper Jurassic deep marine carbonates; D= Liassic shallow platforrn carbonates; E= Upper
Triassic deep marine shales and carbonates; F = Hercynian-type cristalline rocks.

sent. Analysis of seismic attributes and reflector low frequency and variable latera! continuity. The
pattern analysis developed in the frame of a PhD reflection characteristics depend on the seismic
thesis (Sulli, 1994) made it possible to estimate the source, processing and on the generai variation in
lithology and geometry of the studied successions. lithology, density and fabric of the sediments
The interpretations, based also on velocity analysis (Anselmetti and Eberli, 1993). Internai geometries
data, were calibrated by dredges and well log data, are regular over a wide area. The signa) is consistent
coming from adjacent areas. The different seismic with thick bedded carbonate platform rocks, as con-
signals generated by the different lithologies make it firmed by well-control.
possible to distinguish various seismic facies (Fig.
4). (3) Facies C presents medium amplitude and ve-
locity, and high frequency; the signa!, which is ho-
(l) Facies A is characterized by high to medium mogeneous but not continuous, is generated by thin
amplitude, variable frequency and very high veloc- bedded pelagic carbonates and marls.
ity. The seismic signa) is discontinuous and often
covered by diffraction effects. We associated this (4) Facies D is characterized by discontinuous and
facies to crystalline basement rocks. non homogeneous horizons, with alternation of high
and low amplitude, high frequency and lower veloc-
(2) Facies B is topped by a high-amplitude, high- ity. This facies corresponds to coarser clastic and
velocity reflector while the internai reflectors are of argiiiaceous successions.