Strike-Slip Dislocations in the North of West Siberian Basin

Georgiy N. Gogonenkov
Central Geophysical Expedition, Moscow, Russia.

Extensive employment of 3D seismic exploration in recent years has helped reveal a wide-scale development of strike-slip dislocations in the basement of central and northern West Siberia. These basement dislocations have caused complex plicated and disjunctive dislocations in the sedimentary cover that holds tens of largest oil and gas fields. The paper, illustrated with a good number of strike-slip fault structures (SSFS), discusses areal extents of SSFS and how real styles of SSFS differ from theoretical models described in relevant literature authored by world’s geophysical community, as well as structural frameworks of and oil and gas presence in the areas of SSFS development. The paper evidences that strike-slip dislocations were formed during the final Hercynian folding stage, and characterizes neo-tectonic process that proceeded at the Neogene-Quaternary age.

The genetic nature of strike-slip dislocation systems is discussed. Based on an analogy with the physical modeling results, proof is provided that the formation of the strike-slip dislocation systems, thus brought out, has been due to an impulse of meridional compression from the Arctic basin.

Assumption is validated that neo-tectonic environment facilitating SSFS formation extends northwards into the continental shelf and surrounding Kara Sea offshore areas.

AAPG Search and Discover Article #90096©2009 AAPG 3-P Arctic Conference and Exhibition, Moscow, Russia