Age of overthrust-type granites in the accretionarycollisional system of the early Caledonides (western Baikal region)

The western Baikal region (Ol'khon region, Nutgei zone, Kharikta area) is characterized by the development of packets of thrust-type folds and synkinematic granites corresponding to the stage of thrust deformations (overthrust-type granites). Two stages in the formation of thrust-type folds separated by episodes of granite emplacement are definable. The data obtained make it possible to estimate both the time of transition from thrust to strike-slip deformations and the duration of accretionarycollisional events that resulted in regional strike-slip deformations, which terminated in the western Baikal region 460455 Ma ago.