Discovery of Contact Metamorphism-Related Baddeleyite from the Bayan Obo Deposit,Northern North China Craton

摘要

Objective Baddeleyite(ZrO 2)occurs primarily as an accessory mineral in igneous rocks with low silica activity and has been widely used to determine crystallization ages of maficultramafic rocks and alkaline rocks including carbonatites and kimberlites.The Bayan Obo deposit on the northern margin of the North China Craton(NCC)is the world’s largest REE deposit.Many previous studies show that