New data on the isotope ages of the Taratash and Aleksandrovka metamorphic complexes

New data on the isotope age of metamorphic rocks of the Taratash and Aleksandrovka Complexes are given and all the available isotope data of these rocks are reviewed. It is established that the age of the stratified part of the Taratash Complex is Late Archean to Early Proterozoic (>2000 Ma) and plutonic rocks are of Early Proterozoic age, approximately corresponding to that of migmatites of the Taratash Complex. The Taratash and Aleksandrovka complexes are most likely of the same age.