Structure forming processes in the north-eastern zone of the Kolumbinsky fault (the Northern Sikhote-Alin)
The dominant sinistral strike-slip movement along the Kolumbinsky fault was recognized through the reconstruction of stress fields as well as using the method of belts in distributing orientations of slickensides and dyke-hosting faults. This movement was triggered by the regional-scale SES-NWN-oriented compression. Migmatites of the Eastern Sikhote-Alin volcano-plutonic belt are considered as formations synchronous with the regional displacement. In line with V.P. Utkin, they are inferred to be of rifting strike-slip and pull-apart nature. Based on the structural and tectonic position of volcanic rocks and accompanying intrusions as well as other general geological data, several stages of dislocation are recognized in the postaccretionary history of the Kolumbinsky fault and the area under consideration. At the end of these stages, the predominant strike-slip motion along the fault and feathering it displacements were replaced by synchronous transpressional and normal faulting.