Abstract

Kinematic types of seismogenerating structures, morphotectonic features of the present-day topography, and the corresponding tectonic stress fields derived from the focal mechanisms of local earthquake and the types of Late Cenozoic folding and faulting are analyzed to create a model of current geodynamics in the Yana-Indigirka segment of the Chersky seismotectonic zone. The kinematic environment in the Yana-Indigirka segment of the Chersky seismotectonic zone is a result of the interaction of conjugate differently oriented strike-slip displacements under transpression conditions (a compression with strike-slip). It is possible to reconstruct these conditions, if we assume that the Kolyma-Omolon block (superterrain) located in the frontal part of the North American Plate played the role of an active indenter during the approach of the North American and Eurasian Plates.

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