Age and origin of rocks of the Daldyn Group of the Anabar Shield: Evidence from U-Pb zircon dating, Sm-Nd and Lu-Hf isotope systematics

摘要

The Hf-Nd isotope systematics was used to determine the genesis of zircons from granulites of the Daldyn Group of the Anabar Shield. Obtained age of magmatic crystallization for biotite-hypersthene crystalline schists and garnet amphibolites agree with position of zircons within terrestrial array. Magmatic genesis of plagiogranite neosome under granulite conditions was established for leucocratic plagiogneisses.