Relationship between Local and Regional Stress Fields of the Altai‒Sayan Fold Region: Results of Structural–Paragenetic and Cataclastic Methods of Fault Analysis

Based on results of structural studies using the structural–paragenetic and cataclastic methods of disjunctive deformation analysis of the Altai‒Sayan and Western Sayan region that formed the Altai‒Sayan fold region, a complex structure of the stress field of the neotectonic stage was revealed. The lateral structural heterogeneities of the region determibe sihnificant variations in the stress field with the prevalence of a general shear deformation setting. In the study region, the submeridional direction of maximum horizontal compression is most clearly expressed. The manifestation of compression transversely and longitudinally to local and regional structures in which the orientation of the Paleozoic structural plan significally dominate, was also established. We consider the reason for the complex tectonics and geodynamics of the Altai‒Sayan fold region is in the activation of the Paleozoic disjunctive structures of the Alpine stage.