Title

S. N. Kashubin, N. I. Pavlenkova, O. V. Petrov, E. D. Milshtein, S. P. Shokalsky, Yu. M. Erinchek

Crustal types in the Circumpolar Arctic

The paper presents results of generalization of seismic survey made in the Circumpolar Arctic in terms of crustal type variations for various tectonic structures of the area. Correlation pattern of the crustal types, which differ in velocity and density parameters, the structure and total thickness of the crust has been compiled and a working map of the crustal types distribution in structures of the Circumpolar Arctic has been constructed on its basis. The study of different crustal types and patterns of their distribution over the area depending on types of geological structures is of great interest from the viewpoint of the history of the crust formation and transformation as a whole. The correlation pattern and the crustal types map reflect fundamental geodynamic processes of the origin and development of the continental crust, the destruction of the latter until the appearance of the newly-formed oceanic crust during cyclical development of our planet.
Key words: deep seismic studies, oceanic and continental crust, the Circumpolar Arctic.