Examined area comprises the entire Central Kazakhstan region from the Sarysu-Teniz Uplift to the Tokrau Deep. Post-telbessian (after Middle Devonian) history of this heterogeneous tectonically region seems to be relatively uniform: all or almost all distinctive tectonic units here accommodate the Early Carboniferous basins, Late Paleozoic volcanic deeps, granitoid intrusions, etc. Local post-telbessian structures are similar in many aspects: (1) telbessian unconformity are overall very clear, and areas of the Early Carboniferous sediments coincide with areas of Upper Paleozoic volcanic rocks; 2) all structures are confining with diagonal (NE and NW) fault net; (3) intrusions located in limits of these structures are of clearly polyhedral shape; (4) sedimentary basins, polyhedral volcano-tectonic depressions, feeder zones, intrusive massifs, dykes and dyke swarms are of regular and of closely similar structural patterns.

Faults controlled post-telbessian structuring are usually deep-seated. There is consisting rather strong correlation between fault orientation and its kinematics (or between orientation of tectonic fabrics and dynamic setting of their development): NW fractures are dextral strike-slip faults, whilst NE trending faults are sinistral ones; E-W zones of intensive deformations have been formed under compressional conditions, and N-S trending dyke swarms and paleo-volcano chains indicate extensional patterns. These dynamic settings maintained for a long time since once and the same extension fractures were repeatedly used by magmatic bodies of different age.

Thus, post-telbessian structure of Central Kazakhstan has developed under condition of relatively monotonous stress field with sub-N-S orientation of main compression and E-W orientation of main extension. Primarily brittle deformation of upper crust in this region has accompanied by formation of two wrench systems (which are NW system of dextral strike-slip faults and NE system of sinistral strike-slip faults) with complementary set of local compressional and extensional fabrics; the latter can be described as strike-slip-related. Diversity of relationships between magmatic and non-magmatic members taken part in building of examined structures is caused by thermal history of corresponding regions and are not connected with magnitude of strike-slip opening. Within study area, the dextral and sinistral domains are distinguishing clearly; each of them chiefly contains strike-slip faults of one only orientation and sense of displacement. Local compressional and extensional structures of different generations can interfere in very different manner; however, the regional ratio of amount of compressional and extensional structures is changing during the time reflecting likely the quantitative variations of regional stresses.

  The work is supported by RFFI, grants 96-05-65519, 96-05-65521.