New data on the U-Pb zircon age of the pre-alpine crystalline basement of the black-sea-central transcaucasian terrane and their geological significance

The available data on the composition, interrelation, age and formation conditions of the pre-Alpine crystalline basement constituting rocks of the Black Sea-Central Transcaucasian terrane are considered. It is shown that the main stages of regional metamorphism and granite formation are fully corroborated by new U-Pb LA-ICP MS dating. The investigations carried out to fill up the gaps existing in isotope-geochronological data of the crystalline basement of the Black Sea-Central Transcaucasian terrane and considerably specify the age of pre-Alpine endogenic processes. © 2011 Bull. Georg. Natl. Acad. Sci.