ACTIVE TECTONICS IN THE HELLENIC VOLCANIC ARC: THE KOLUMBO SUBMARINE VOLCANIC ZONE


D. Sakellariou
H. Sigurdsson
M. Alexandri
S. Carey
G. Rousakis
P. Nomikou
P. Georgiou
D. Ballas
Résumé
This paper studies the rupture system of the Anydhros Basin, northeast of Thera island, and its relationship to the submarine volcanic activity along the Kolumbo line. Anydhros Basin is a N45o E trending elongate basin bounded by the Ios-Fault-Zone (IFZ) towards NW and by the AnydhrosFault-Zone (AFZ) towards SE. The AFZ continues southwestwards, crosscutting Thera Island. Swath bathymetry and seismic profiling data indicate that the Anydhros basin sedimentary infill is fractured by vertical, predominantly strike-slip faults, parallel to which the volcanic cones are aligned. We propose that the “KameniKolumbo Line” is an active, 40km-long, strike-slip fault zone. The KameniKolumbo strike slip runs through the volcanoes of Nea Kameni and Kolumbo and controls the spatial distribution of the volcanic cones along the axis of Anyhdros basin.
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  • Rubrique
  • Marine Geology and Oceanography
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Références
Alexandri, M., Papanikolaou, D., Nomikou, P., and Ballas, D., 2003. Santorini volcanic field – New insights
based on swath bathymetry. Abstracts IUGG 2003, Saporo, Japan.
XLIII, No 2 – 1062
Fig. 3: Tectonic map of Santorini – Kolumbo volcanic field. Swath bathymetry as in Fig. 1. AB:Alpine Basement.
Bohnhoff, M., M. Rische, T. Meier, D. Becker, G. Stavrakakis, and H.-P. Harjes 2006. Microseismic activity
in the Hellenic Volcanic Arc, Greece, with emphasis on the seismotectonic setting in the Santorini-Amorgos
zone. Tectonophysics, 423 (2006) 17–33.
Dimitriadis, I., Karagianni, E., Panagiotopoulos, D., Papazachos, C., Hatzidimitriou, P., Bohnhoff, M.,
Rische, and M., Meier, T., 2009. Seismicity and active tectonics at Coloumbo Reef (Aegean Sea,
Greece): Monitoring an active volcano at Santorini Volcanic Center using a temporary seismic network.
Tectonophysics, in press (doi: 10.1016/j.tecto.2008.11.005)
Dominey-Howes, D.T.M., G.A. Papadopoulos and A.G. Dawson, 2000. Geological and historical investigation
of the 1650 Mt. Columbo (Thera Island) eruption and tsunami, Aegean Sea, Greece. Natural
Hazards, 21, 83-96.
Fouqué, F. 1879. Santorin et ses Éruptions, Masson et Cie, Paris.
Fytikas, M., N. Kolios, and G. Vougioukalakis (1990), Post-Minoan volcanic activity of the Santorini
volcano: Volcanic hazard and risk, forecasting possibilities, in Thera and the Aegean World III, vol.
, Earth Sciences, edited by D. A. Hardy, 183–198, Thera Found., Essex, UK.
Huebscher, C., Hensch, M., Dahm, T., Dehghani, A., Dimitriadis, I., Hort, M., Taymaz, T., 2006. Toward
a Risk Assessment of Central Aegean Volcanoes. EOS, Vol. 87, No. 39, 26 September 2006.
Le Pichon, X., Angelier, J., 1979. The Hellenic arc and trench system: a key to the neotectonic evolution
of the Eastern Mediterranean area. Tectonophysics 60, 1–42.
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.
Mc Kenzie, D.P., 1970. Plate tectonics of the Mediterranean region. Nature 226, 239–243.
Perissoratis, C. 1995. The Santorini volcanic complex and its relation to the stratigraphy and structure of
the Aegean arc, Greece, Marine Geology, 128, 37–58.
Sigurdsson H., Carey S., Alexandri M., Vougioukalakis G., Croff, K., Roman C., Sakellariou D., Anagnostou
C., Rousakis G., Ioakim C., Gogou A., Ballas D., Misaridis T., and Nomikou P., 2006. Marine
Investigations of Greece’s Santorini Volcanic Field, EOS, Vol 87 N. 34, 22 August 2006.
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