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

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Published: Jan 1, 2010
DOI: https://doi.org/10.12681/bgsg.11270
Keywords:
Anyhdros basin swath bathymetry seismic profiling Kameni-Kolumbo strike-slip fault zone
D. Sakellariou
Institute of Oceanography, Hellenic Centre for Marine Research
H. Sigurdsson
Graduate School of Oceanography, University of Rhode Island
M. Alexandri
Institute of Oceanography, Hellenic Centre for Marine Research
S. Carey
Graduate School of Oceanography, University of Rhode Island
G. Rousakis
Institute of Oceanography, Hellenic Centre for Marine Research
P. Nomikou
Institute of Oceanography, Hellenic Centre for Marine Research
P. Georgiou
Institute of Oceanography, Hellenic Centre for Marine Research
D. Ballas
Institute of Oceanography, Hellenic Centre for Marine Research
Abstract
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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  • Marine Geology and Oceanography
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