U-Pb age and REE chemistry of zircons in pelitic gneisses from the Higo metamorphic Belt, Japan: Implication for timing of high-temperature metamorphism

抄録

This study reports the U-Pb age and rare earth elements characteristics of zircon from pelitic gneisses in the Higo metamorphic Belt to constrain its timing of high-temperature metamorphism. The results indicate ca. 125 Ma age may be corresponding to the timing of prograde metamorphism, while ca. 110 ma age might be indicative of post-date of peak metamorphic condition. The retrograde metamorphism happened before ca. 105 Ma one obtained from zircon of discordant granite intrusion.