The First Data on U-Pb (SHRIMP) Dating of Zircon from Metamorphic Rocks of the Crystalline Base of the Taigonos-Paren Uplift (Southern Margins of the Omolon Massif)

摘要

U-Pb SHRIMP dating of zircons from metamorphic rocks of the crystalline basement of the Omolon-Taigonos area (northeastern margins of Asia) has been used to determine the periods of early endogenic activity of the crust. These periods correlate to the time of formation of the magmatic rock protolith (3.2-3.3 Ga), the stage of regional metamorphism (2.6-2.8 Ga), and the superimposed granitization. The resulting data can be used to reconstruct the history of development of the crust in the Precambrian.