Supervisors info:
Δημήτριος Παπανικολάου, Καθηγητής ΕΚΠΑ (επιβλέπων), Δρ. Δημήτριος Σακελλαρίου, Ευθύμιος Λέκκας Καθηγητής ΕΚΠΑ
Summary:
Anhydros basin, NE of Santorini, Greece, is a rift basin at the back arc area
of the active Hellenic Orogenic Arc. A volcanic chain has been developed within
the basinal area and its dominant feature, Kolumbo volcano, is the most
spectacular submarine volcanic structure. Its distinct character is mainly
based on the highly dynamic, unstable and affected by frequent earthquakes and
volcanic activity hydrothermal vent field, situated chiefly on the northern
part of the crater floor at an average depth of 500 meters. A combined detailed
analysis of bathymetric data obtained during “GEOWARN” project in 2001, ROV
(Remotely Operated Vehicles) data collected in August 2010 in the frame of a
collaborative project (New Frontiers in Ocean Exploration 2010) between the
Graduate School of Oceanography at the University of Rhode Island (URI-USA),
the Dept. of Geology & Geoenvironment of University of Athens (NKUA-GREECE),
the Institute for Exploration (IFE-USA), and the Institute of Geology and
Mineral Exploration (IGME-GREECE), and air-gun lithoseismic profiles recorded
during “THERA” project in 2006 aboard the R/V Aegaeo, has led to the
construction of a morphotectonic map of Anhydros basin. As revealed by the
analysis of the data, KVC (Kolumbo Volcanic Chain) has been developed within
the basinal area of Anhydros as a result of volcanotectonic processes. It forms
an intra-graben tectonic horst and is line with Kolumbo fault at the onshore
northern part of Santorini, points of hydrothermal activity at the northern
part of Santorini caldera and dykes that occur at the northern Santorini
caldera walls and the overall configuration of Santorini volcanic field. Thus,
it is part of a wider volcanotectonic zone developed within a tectonic graben
bordered by Ios Fault Zone to the NW and Anafi Fault Zone to the SE.
Keywords:
Kolumbo volcano, Anhydros basin, Seismic profiling, Submarine tectonics, Swath bathymetry
