| More


Views: 604 Downloads: 412
D. Sakellariou, G. Rousakis, G. Vougioukalakis, Ch. Ioakim, I. Panagiotopoulos, I. Morfis, E. Zimianitis, K. Athanasoulis, K. Tsampouraki-Kraounaki, D. Mpardis
D. Sakellariou, G. Rousakis, G. Vougioukalakis, Ch. Ioakim, I. Panagiotopoulos, I. Morfis, E. Zimianitis, K. Athanasoulis, K. Tsampouraki-Kraounaki, D. Mpardis


Preliminary interpretation of swath bathymetry data and seismic profiles acquired during four cruises of "YPOTHER/Aegean Explorations" project aboard R/V Aegaeo provides insights into the fault network, fault kinematics and deformation pattern of the western part of the North Aegean Trough (NAT). The N40°E trending western part of the dextral North Anatolian Fault (NAF) runs along the southern margin of the NAT. Numerous high-angle fault splays initiate from and at low angle to NAF. They run firstly in NE-SW direction and then gradually turn to SE-NW forming an imbricate fault pattern, a nicely developed horsetail structure at the western termination of the NAF. The horsetail pattern deforms the NAT's sedimentary infill forming elongate, curved, uplifting or subsiding tectonic blocks arranged along the fault splays. Instead of the expected transtension, the Western NAT's infill displays dextral shearing and transpression associated with a major stress axis in NW-SE direction. The possible explanation for the transpressional deformation of the Western NAT infill may be related with the change of the trend of NAF from N40°E in the western trough to N70°E east of Lemnos Island.


strike-slip fault; horsetail structure; transtension; transpression; North Anatolian Fault

Full Text:



Armijo, R., Meyer, B., King, G., Rigo, A. and Papanastassiou, D., 1996. Quaternary evolution of the Corinth

rift and its implications for Late Cenozoic evolution of the Aegean, Geophys. J. Int., 126, 11-53.

Billiris, H., Paradissis, D., Veis, G., England, P., Featherstone, W., Parsons, B., Cross, P., Rands, P., Rayson,

M., Sellers, P., Ashkenazi, V., Davison, M., Jackson, J. and Ambraseys, N., 1991. Geodetic

determination of tectonic deformation in central Greece from 1900 to 1988, Nature, 350, 124-129.

Brooks, M. and Ferentinos, G., 1980. Structure and evolution of the Sporades basin of the North

Aegean Trough, Northern Aegean Sea, Tectonophysics, 68, 15-30.

Clarke, P.J., Davies, R.R., England, P.C., Parsons, B., Billiris, H., Paradissis, D., Veis, G., Cross,

P.A., Denys, P.H., Ashkenazi, V., Bingley, R., Kahle, H.G., Muller, M.V. and Briole, P.,

Crustal strain in central Greece from repeated GPS measurements in the interval 1989-

, Geophys. J. Int., 135, 195-214.

Davies, R., England, P., Parsons, B., Billiris, H., Paradissis, D. and Veis, G., 1997. Geodetic strain

of Greece in the interval 1892-1992, J. Geophys. Res., 102, 24,571-24,588.

Dewey, J. and Sengor, A.M.C., 1979. Aegean and surrounding region: Complex multiplate and

continuum tectonics in convergent zone, Geol. Soc. Am. Bull., 90, 84-92.

Hancock, P.L. and Barka, A.A., 1980. Plio-Pleistocene reversal of displacement on the North Anatolian

Fault Zone, Nature, 286(5773)5, 91-594.

Jongsma, D., 1975. A Marine Geophysical Study of the Hellenic Arc, Ph.D, Thesis, Cambridge University.

Laigle, M., Hirn, A., Sachpazi, M. and Roussos, N., 2000. North Aegean crustal deformation: An

active fault imaged to 10 km depth by reflection seismic data, Geology, 28, 71-74.

Lalechos, N. and Savoyat, E., 1979. La sedimentation Neogene dans le Fosse Nord Egeen, 6th

Colloquium on the Geology of the Aegean Region, 2, 591-603.

Le Pichon, X. and Angelier, J., 1979. The Hellenic Arc and trench system: A key to the neotectonic

evolution of the eastern Mediterranean area, Tectonophysics, 60, 1-42.

Le Pichon, X. and Angelier, J., 1981. The Aegean Sea, Philos, Trans. R. Soc. London, Ser. A, 300, 357-372.

Le Pichon, X., Chamot-Rooke, N., Lallemant, S., Noomen, R. and Veis, G., 1995. Geodetic determination

of the kinematics of central Greece with respect to Europe, J. Geophys. Res., 100, 12,675-12,690.

Lyberis, N., 1984. Tectonic evolution of the North Aegean Trough. In: The Geological Evolution of

the Eastern Mediterranean, Spec. Publ. Geol. Soc., 17, 709-725.

McClusky, S., Balassanian, S., Barka, A., Demir, C., Ergintav, S., Georgiev, I., Gurkan, O.,

Hamburger, M., Hurst, K., Kahle, H., Kastens, K., Kekelidze, G., King, R., Kotzev, V., Lenk,

O., Mahmoud, S., Mishin, A., Nadariya, M., Ouzounis, A., Paradissis, D., Peter, Y., Prilepin,

M., Reilinger, R., Sanli, I., Seeger, H., Tealeb, A., Toksöz, M.N. and Veis, G., 2000. Global

Positioning System constraints on plate kinematics and dynamics in the eastern

Mediterranean and Caucasus, J. Geophys. Res., 105, 5695-5719.

McKenzie, D.P., 1972. Active tectonics of the Mediterranean region, Geophys. J. R. Astron. Soc., 30, 109-185.

McKenzie, D.P., 1978. Active tectonics of the Alpine Himalayan Belt, the Aegean Sea and

surrounding regions, Geophys. J. R. Astron. Soc., 55, 217-252.

McKenzie, D.P. and Jackson, J.A., 1983. The relationship between strain rates, crustal thickening,

paleomagnetism, finite strain and fault movements within a deforming zone, Earth Planet.

Sci. Lett., 65, 182-202.

McKenzie, D. and Jackson, J., 1986. A block model of distributed deformation by faulting, J. Geol.

Soc. London, 143, 349-353.

Mascle, J. and Martin, L., 1990. Shallow structure and recent evolution of the Aegean Sea: A

synthesis based on continuous reflection profiles, Marine Geology, 94, 271-299.

Müller, M.D., Geiger, A., Kahle, H.G., Veis, G., Billiris, H., Paradissis, D. and Felekis, S., 2013.

Velocity and deformation fields in the North Aegean domain, Greece, and implications for

fault kinematics, derived from GPS data 1993-2009, Tectonophysics, 597-598, 34-49.

Needham, H.D., Le Pichon, X., Melguen, M., Pautot, G., Renard, V., Avedik, F. and Carre, D., 1973.

North Aegean sea trough: 1972 Jean Charcot cruise, Bull. Geol. Soc. Greece, 10, 152-153.

Nyst, M. and Thatcher, W., 2004. New constraints on the active tectonic deformation of the Aegean,

J. Geoph. Res., 109, B11406, doi: 10.1029/2003JB002830, 2004.

Papanikolaou, D., Alexandri, M., Nomikou, P. and Ballas, D., 2002. Morphotectonic structure of the western

part of the North Aegean Basin based on swath bathymetry, Marine Geology, 190, 465-492.

Papanikolaou, D., Alexandri, M. and Nomikou, P., 2006. Active faulting in the north Aegean basin,

Geol. Soc. America, Sp. Paper 409, 189-209, doi: 10.1130/2006.2409(11).

Sengör, A.M.C., 1979. The North Anatolian transform fault: its age, offset and tectonic significance,

J. Geol. Soc. London, 136, 269-282.

Taymaz, T., Jackson, J.A. and McKenzie, D., 1991. Active tectonics of the north and central Aegean

Sea, Geophys. J. Int., 106, 433-490.


  • There are currently no refbacks.

Copyright (c) 2017 D. Sakellariou, G. Rousakis, G. Vougioukalakis, Ch. Ioakim, I. Panagiotopoulos, I. Morfis, E. Zimianitis, K. Athanasoulis, K. Tsampouraki-Kraounaki, D. Mpardis

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.