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TECTONIC PROCESSES AND CRUSTAL EVOLUTION ON/OFFSHORE WESTERN PELOPONNESE DERIVED FROM ACTIVE AND PASSIVE SEISMICS

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J. Papoulia, J. Makris
J. Papoulia, J. Makris

Abstract


We developed velocity models of the crust and sediments offshore south western Greece, between the island of Zakynthos and Messinia. Using these velocity models and depth migrating the seismic data we delineated the main faults and associated them with the tectonic processes of western Greece. This active seismic experiment was essential for defining the limits between the continental domain of western Greece and the oceanic one of the deep Ionian Sea. We successfully linked the onshore with the offshore tectonics and for the first time it was possible to understand how the main dextral fault systems of Cephalonia and Andravida are responsible for the crustal deformation, and its link to the local seismicity. Most of the seismic activity is connected to thrusting, due to crustal shortening or strike-slip faulting that follows the two main dextral wrench faults of Cephalonia and Andravida. It was recognized that the back stop offshore western Peloponnese is floored by thinned continental crust of Preapulia and that the Hellenic Alpine napes do not extend in the back stop domain.

Keywords


crustal structure; Ionian Sea; Hellenides; Mediterranean Ridge;

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References


Aubouin, J, and Decourt, J., 1962. Zone Preapullien zone Ionienne et zone du Gavrovo en Peloponnese

occidentale. Bulletin de Société Géologique de la France, 4, 785-794.

Aubouin, J, Bonneau, M., Davidson, J., Leboulenger, P., Matesco, S., Zambetakis, A., 1976. Esquisse

structurale de l’arc Egeen externe : des Dinarides aux Taurides, Bull Soc. Geol. France 18, 327-336.

Clément, C., Hirn, A., Charvis, P., Sachpazi, M. and Marnelis, F.: 2000, Seismic structure and the active

Hellenic subduction in the Ionian Islands, Tectonophysics 329, Issues 1-4, 141-156.

IGME, 1989. Seismotectonic Map of Greece with seismological data, 1:500.000 scale, Athens.

Kamberis, E., Marnelis, F., Louckogiannajis, M., Maltezou, F., Hirn, A., and the STREAMERS Group,

Structure and deformation of the External Hellenides based on seismic data from offshore western

Greece. EAGE Special Publications, 5, 207-214.

Kokinou, E., Kamberis, E., Vafidis, A., Monopolis, D., Ananiadis, G., and Zelilidis, A., 2005. Deep seismic

reflection data from offshore western Greece: a new crustal model for the Ionian sea, Journal of

XLIII, No 1 – 366

Petroleum Geology, Vol. 28 (2), 185-202.

Lallemant, S., 1984. La Transversale Nord-Mani; Etude Geologique et Aeromagnetique d’une Structure

Transverse a l’Arc Egeen Extrerne. Dr. troisieme cycle, University Pierre et Maire Curie, 164 pp.

Le Pichon, X., Lallemant, S.J., Chamot-Rouke, N., Lemeur, D., Pascal, G., 2002. The Mediterranean

Ridge backstop and the Hellenic napes, Marine Geology 186, 111-125.

Lyberis, N. and Bizon, G. : 1981, Signification structurale des iles Strophades dans la marge Hellénique,

Marine Geology 39, 57-69.

Makris, J. and Papoulia, J., 2009. Tectonic evolution of Zakynthos island from deep seismic soundings:

thrusting and its association with the Triassic evaporites, Intl. Symposium on Evaporites, Zakynthos,

pp 47-54.

Mariolakos, I., Sabot, V., Fountoulis, I., Markopoulou-Diakantoni, A., Mirkou, R., 1998. Filiatra. Neotectonic

Map of Greece 1:100,000. Earthquake Planning & Protection Org., Athens.

Makris, J., 1977. Geophysical investigations of the Hellenides, Hamburg Geophysical Monographs, Vol. 34.

Makropoulos, C., and Burton, P.W., 1981. A catalogue of the seismicity in Greece and adjacent areas,

Geophys. J. R. astr. Soc., 65, 741-762.

Monopolis, D. and Bruneton, A.: 1982, Ionian Sea (Western Greece): its structural outline deduced from

drilling and geophysical data, Tectonophysics 83, 227-242.

Nikolaou, K., 1986. Contribution to the study of the Neogene and the geology and boundaries of Ionian

and pre-Apulian isopic zonesin relation to petroleum geology observations mainly in the Islands

Strophades, Zante, Cephalonia PhD Thesis Univ. of Athens, Athens (in Greek).

Papanikolaou, D., Fountoulis, J., Metaxas, Ch., 2007. Active faults, deformation rates and Quaternary

paleogeography at Kyparissiakos Gulf (SW Greece) deduced from onshore and offshore data.

Papazachos, V., and Papazachou, C., 1997. The Earthquakes of Greece, Editions Ziti.

Papoulia, J., Makris, J., Tsambas, A., and Fasulaka, Ch., 2010. Seismic deformation in the southwestern

Hellenic arc: Preliminary results from active and passive seismic observations, Bull. Geol. Soc. Gr.

(in press).

Pilipenko, V. and Makris, J., 1997, Application of migration to the interpretation of WARP data. Expanded

Abstracts of the 69th SEG Meeting, Dallas.

SEAHELLARC EC FP6 project, Technical Reports, www.seahellarc.gr.

Stiros, S., 2005. Geodetic evidence for mobilization of evaporates during the 1997 Strophades (W Hellenic

Arc) 6.5 Mw earthquake, J. Geophys. Eng. 2, 111-117.

Underhill, J. R., 1989. Late Cenozoic deformation of the Hellenides foreland, western Greece, Geological

Society of America Bulletin 101(5), 613-634.


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