We study the structure and composition of zircons kilegirskoy thickness Daldyn series. Completed U-Pb dating of these species. The most ancient (by typomorphic signs - magmatic) core of zircons have concordant age 3050-3012 Ma. Seldom zircon with age 2683 plus-minus 20 Ma formed as a result of ultrametagenesis. The most common zircon with the age 1990-1971 plus-minus 12 Ma connected to ultrametagenesis and ultrahightemperature UHT) granulite metamorphism. During decompression stage of granulite metamorphism formed zircon of 1928 plus-minus 128 Ma.
Key words: Anabar Shield, granulites, ultrametagenesis, zircon composition, U-Pb age.