CURRENT STATE AND ISSUES OF THE SIBERIAN PLATFORM TECTONICS

V. S. Staroseltsev

The paper considers the position of the Siberian Platform at the Eurasian continent and the Laptev Sea shelf from the formation of its basement and till the present time. At the same time, it contains analysis of overthrusts trending from its folded framing at various stages of the tectonic evolution. The author justifies the formation of the cover from the Early Proterozoic time and dividing it into seven structural stages different in the formation structure, dislocation patterns and extent. The emphasis is given to the position of depocentres of a large-amplitude downwarping filled with sediments, which is essential in petroleum potential analysis. Various types of disjunctive structures are described, including transregional linear structures, different types of rift structures, large-amplitude overthrusts and faults, diaclases, with evaluation of their impact on formation of plicative structures. The author suggests methodological approaches to prediction of buried highs promising for oil and gas. The territory is divided into zones according to distribution of salt dome structures. The author substantiates the possibility of formation of additional traps and zones of oil and gas accumulation by means of favourable combination of crosscutting and blanket trap intrusions.

Key words: boundaries and structural stages of the cover, disjunctive structure types, prediction of buried highs, extent of salt dome structures.

DOI 10.20403/2078-0575-2016-1-3-15