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IUGG XXIV General Assembly July 2-13, 2007 Perugia, Italy
(S) - IASPEI - International Association of Seismology and Physics of the Earth's
Interior
JSS011 Poster presentation 2136
Complex geophysical research of earth CTUST deep structures and
geodynamics of territory of Armenia
Dr. Hmayak Hovhannisian
IASPEI
Karine Vardanyan
More complete data at present about the construction of Earth crust deep structures and geodynamics
of territory of Armenia are obtained on a basis of gravimetric, geothermal, seismological, geodetic and
other geophysical data. The experience of the long-term research in Armenia showed that a complex
interpretation of gravimetric, geothermal, seismological data is the important means of decrease in
multivalence and increase in the truth of constructions of structural - dynamic models of the Earth crust.
As a result of quantitative interpretation of gravitational and thermal fields in a complex with deep
seismic sounding (DSS) data, seismometry, the data of the stations " Earth " and "Turtle" and geodesy
the three-dimensional structural-dynamic model of the Earth crust is plotted in scale 1:200000. It is
stated that the Earth crust of territory of Armenia has a heterogeneous, three-layer structure. The
borders of layers coincide with the surfaces of crystal base, Konrad and Mochorovichich. The localization
places of vertical nonhomogeneties are established coinciding with the zones of deep breaks. According
to the data of velocities of Earth surface modern vertical and horizontal (GPS) motion changes in time of
gravitational and geomagnetic fields, seismic regime, and also a thermal stream, made an estimation of
relative geodynamic activity of blocks as well as its delimited zones of deep breaks. The calculation of
deep temperatures, their changes for the last million years within a frame of the generalized regional
thermal model shows, that near the borders of a volcanic belt of territory of 15-23 km depths, where
the changes in temperatures reaching the order of 10-12-10-13 , are enough for the accumulation of
thermoelastic pressure, exceeding durability of breeds. As a result of complex interpretation of highspeed,
gravitational and thermal models on a structural - dynamic model of seismoactive layer is
allocated, the sole of which is placed at depths of 13-30km according to the data of earthquakes
hypocenters.
Keywords: geodynamics