Abstract:Baiyinnuoer lead-zinc deposit in Inner Mongolia is a famous super-large skarn lead-zinc deposit in northern China. The ore bodies are vein-like and cystic, occurring in the marble of the Middle Permian Zhesi Formation and controlled by the silica-calcium surface and NE-trending faults. According to the cut-through relationship, the ore body formed later than the volcanic rocks of the Manketouebo Formation in the late Jurassic and earlier than the diorite porphyrite. By zircon LA-ICP-MS U-Pb dating, the age of volcanic rocks and dioritic porphyries is 149.9 (+2.5 Ma) and 140.3 (+2.6 Ma), which defines the metallogenic age as 140.3 (+2.6) to 149.9 (+2.5 Ma), belonging to the Late Jurassic-Early Cretaceous. Based on the geological characteristics and regional metallogenic regularity of the deposit, it is considered that the metallogenic geology may be concealed high-evolution granite in the same period, suggesting that there is a huge prospecting prospect in the deep part of the deposit.