Page 13 - 05 albarello
P. 13
Finite element modelling of the recent-present deformation pattern in the Calabrian are and surrounding regions
and Eurasia. The proposed modelling approach ANDERSON, H. and J. JACKSON (1987): Active tectonics of
tries to simulate the presence of major tectonic the Adriatic region, Geophys. J. R. Astron. Soc., 91,
discontinuities - indicated by seismotectonic 937-983.
studies - by the use of highly deformable nar-
row zones. ANTONELLI, M., R. FRANCIOSI, G. PEZZI, A. QUARCI, G.P.
RoNCO and F. VEZZANI (1988): Paleogeographic evo-
The kinematic boundary conditions imposed lution and structural setting of the northern side of
on the model are accommodated by the lateral Sicily Channel, in Proceedings 74th Congr. Soc. Geo!.
escape of crustal wedges in Calabria and ltal., 79-86.
Sicily. The resulting microplate kinematics
produces the distribution of recent-present ARGNANI, A. (1993): Neogene basins in the Strait of Sicily
compressional, tensional and transcurrent de-
formations observed in the study area. This (Centrai Mediterranean): tectonic settings and geody-
could imply that «interual» driving forces, such namic implications, in Recent Evolution and Seismicity
as gravitational sinking or active rifting, are of the Mediterranean Region, edited by E. BosCHI,
not necessary to account for extensional tec- E. MANTOVANI and E. MORELLI (Kluwer Academic
tonics in the Southern Tyrrhenian and Sicily Publishers, Dordrecht), 173-187.
Channel. ARGNANI, A., S. CORNINI, I. TORELLI and N. ZITELLINI
(1987): Diachronous foredeep-system in the Neogene-
The results obtained point out that the pres- Quatemary of the Strait of Sicily, Mem. Soc. Geo!. lt.,
ence of major tectonic discontinuities where 38, 123-130.
strain can be much higher than in the surround- AVOUAC, J.P. and P. TAPPONIER (1993): K.inematic mode!
ing zones strongly affect the computed dis- of active deformation in Centrai Asia, Geophys. Res.
placement field. This implies that modelling Lett., 20 (l 0), 895-898.
approaches which neglect such tectonic fea- BALDI, P., V ACHILLI, F. MULARGIA and F. BROCCIO
•:ures could provide unreliable indications. (1983): Geodetic surveys in the Messina Straits area,
Boli. Geod., 57, 283-293.
Acknowledgements BARBANO, M.S., M.T. CARROZZO, P. CAVERNI, M.
COSENTINO, G. FONTE, F. GHISETTI, G. LANZAFAME,
We are grateful to Profs. P. Gasperini and
R. Sabadini for a criticai reading of the G. LOMBARDO, G. PATANÈ, M. RIUSCETTI, L. TOR-
manuscript and for fruitful suggestions. This TORICI and L. VEZZANI (1978): Elementi per una carta
research has been supported by the National
Research Council (CNR-GNDT), the Agenzia sismotettonica della Sicilia e della Calabria Meri-
Spaziale Italiana (ASI) and the Ministry of Re- dionale, Mem. Soc. Geo!. lt., 19, 681-688.
search and Education (MURST). BARONE, A., A. FABBRI, S. ROSSI and R. SARTORI (1982):
Geologica! structure and evolution of the marine areas
REFERENCES adjacent to the Calabrian are, Earth Evo!. Sci., 3,
207-221.
ALBARELLO, D., M. MUCCIARELLI and E. MANTOVANI BARRIER, E. (1992): Tectonic analysis of a flexed foreland:
(1990): Adriatic flexure and seismotectonics in South- the Ragusa platform, Tectonophysics, 206, 91-111.
em Italy, Tectonophysics, 179, 103-111. BASSI, G. and R. SABADINI (1994): The importance of sub-
duction for the modem stress field in the Tyrrhenian
ALBARELLO, D., E. MANTOVANI, D. BABBUCCI and C. area, Geophys. Res. Lett., 21 (5), 329-332.
TAMBURELLI (1993): Africa-Eurasia kinematics in the BECCALUVA, L., P.L. ROSSI and G. SERRI (1982): Neogene
Mediterranean: an alternative hypothesis, in Recent
Evolution and Seismicity of the Mediterranean Region, to recent volcanism in Sonthem Tyrrhenian. Sicilian
edited by E. BOSCHI, E. MANTOVANI and E. MORELLI area, Earth Ev. Sci., 3, 222-238.
(Kluwer Academic Publishers, Dordrecht), 65-104. BECCALUVA, L., P.L. RoSSI and G. SERRI (1983): Neogene
ALBARELLO, D., E. MANTOVANI, D. BABBUCCI and C. to recent volcanism of Southern Tyrrhenian. Sicilian
TAMBURELLI (1995): Africa-Eurasia kinematics: main area: implications for the geodynamic evolution of the
constraints and uncertainties, Tectonophysics, 243, Calabrian are, in Evolution and Present Dynamics of
25-36. the Calabrian Are, edited by E. MANTOVANI and R.
SARTORI, Earth Evo[. Sci., 3, 222-238.
BEN AVRAHAM, Z. and M. GRASSO (1990): Collisional
zone segmentation in Sicily and surrounding areas
in the Centrai Mediterranean, Ann. Tectonicae, 4,
131-139.
BENINA, A., S. lMPOSA, S. GRESTA and G. PATANÈ (1985):
Studio macrosismico e strumentale di due terremoti !et-
tonici avvenuti sul versante meridionale dell'Etna, in
GNGTS, Atti IV Convegno, vol. l, 931-940.
BIGI, G., A. CASTELLARIN, R. CATALANO, M. COLI, D.
COSENTINO, G.V. DAL PIAZ, F. LENTINI, M. PAROTTO,
E. PATACCA, A. PRATURLON, F. SALVINI, R. SARTORI,
P. SCANDONE and G.B. VAI (1989): Synthetic struc-
tural-kinematic map of Italy - scale l :2000000, CNR-
PFG, Roma.
845
