geodynamics

The constructed model for a deep structure of the lithospere under the Neftegorsk earthquake region shows that North Sakhalin consists of the North Sakhalin sedimentary basin, the Deryugin basin and the ophiolite complex located between them. The ophiolite complex composed of the the ultrabasic rocks, fixes the position of the ancient subduction zone which was active about 100-60 million years ago. On a surface the subduction zone manifests itself as deep faults running along Sakhalin.

The thesis applies for the original geodynamical investigations of the Transcarpathians territory. New laser-digital techniques of tension and weather-temperature observations on the base of author’s implementations were used. Such techniques  allow to observe and study sub-low geological processes and movements before, during and after earthquakes, create a of tension and weather-temperature data base, make complex analyses and processing of geophysical information.

Based on the studies performed earlier [2, 3, 5], and also the problems solved by regional geodynamics [4], we propose a combined method of studying the latter - the method of processing the accumulated information about the physical fields of specific regions, adequate to the nature of the processes being studied.

Aim. Geodynamic interpretation of previously obtained 3D density and magnetic modeling results, and data on consolidated crust fault tectonics of the Dnieper part of Dnieper-Donets basin (DDB) in the light of its formation mechanism.

On the examples of various geological situations (Ukrainian Shield and Transcarpathian deep) are shown the efficiency of applying of geophysical method as to searching of tectonics, geodynamics and geological prognosis

A method of comparative GPS-tectonics for study and modeling of surface and deep Earth dynamics by comparing of revealed on the results of GPS-measurements the recent tectonic activity with revealed on geological and geophysical data the paleotectonic reconstructions was proposed. A model of geodynamics of Antarctic lithospheric plate with linkage of deformations to Euler rotation pole was build.
 

The mapping approach based on revealed property of the geodynamical memory of actual soil cover (Holocene) is realized. Structure and facies of the soil cover are considered as a new information donor about the relief dynamics. The raw of tectogenic evolution of the soil-forming processes and the soil types in the range from subsidences to stable regime and elevations with different intensity is determined. For the Western Volyno-Podillya and Pre-Carpathian foredeep the calibration raw “soil type – total amplitude of vertical movements” is justified.

Estimated from GPS observations velocities of GPS-stations were used to obtain 2D-model velocities and strain rate field in the Eastern Europe. The study of the velocities field in the region was done in a few steps. The first one consists of the development of the finite element approach on the geosphere based on bicubic spline functions and least squares collocation method for the interpolation scattered GPS-data to the regular nodes. The second one represents the inversion of velocities from GPS-observations to the strain rate tensor.

   Estimated from GPS observations velocities of GPS stations were used to obtain 2D model velocities and strain rate field in the Greece, the Turkey and Iran area. As a result, the study of the velocities field was done in the following steps. The first one consists of the development of the finite element approach on the geosphere based on bicubic spline functions for the interpolation scattered GPS data to the regular nodes because observations have irregular distribution. The second one represents the inversion of velocities from GPS observations to the strain rate tensor.

Purpose. To investigate lithosphere heterogeneity of the Dnieper part of the Dniper-Donets basin and its stages after 3D gravity and magnetic modeling using the data of DDS, seismic tomography, geological structure of the Precambrian basement, and sedimentary cover for subsequent geodynamic interpretation.