Geodynamic Features and Density Structure of the Earth’s Interior of the Antarctic and Surrounded Regions with the Gravimetric Tomography Method

This paper presents the Earth’s interior data of the Antarctic and surrounding regions obtained through the gravimetric tomography method developed by the authors and destined for reconstruction and displaying the structural geological inhomogeneities in different layers. Characteristics of the global geoid height model’s spherical harmonics are the input data for the method. They are both used for determination of the layers’ depths disturbing geopotential and for computing of harmonic dense anomalies. Vertical and lateral sections calculated show a distribution of masses in all range of depths up to 5300 km, geometry and sizes of density inhomogeneities, their displacement in depth under the impact of geodynamic processes, and also correlation of subsurface bodies with the known topographic features. A significant difference between geodynamic processes in geospheres of the core, mantle and crust is emphasized.