We have considered the problems of dating Paleozoic granitoids of the Selenga-Stanovoy mountainous area (SSMA) and reviewed and compared the available dates. New Rb-Sr-isotope dates for four objects of the West Stanovoy structure-formational zone (WS) are presented, which confirm the existence of Carboniferous (360–290 Ma) magmatic stage not only in the west but also in the center of the WS and refine the age of Early Paleozoic batholiths of the Olekma complex (480–430 Ma). This indicates that they are coeval with batholiths of the Malkhan complex in the neighboring Khilok-Vitim SFZ. Moreover, as all studied granitoids are of crustal (palingenetic) origin, we proposed a model for Sr-isotope evolution of this segment of the Earth’s crust.
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