1. Institute of Mineral Deposits��Chinese Academy of Geological Sciences��Beijing 100037��China; 2. Jinyuan Mining Industry Co. ��Ltd��Lingbao 472500��Henan��China; 3. College of Earth Sciences��Jilin University��Changchun 130061��China; 4. School of Earth and Resource Sciences��China University of Geosciences��Beijing 100083��China

Western Henan located between the northern Qinling orogenic belt and the southern North China platform��is one of the important molybdenum polymetallic and precious metal metallogenic belts in China. The previous work suggested that molybdenum deposits in the area are occurred in three stages��including 233 �� 221 Ma�� 148 �� 138 Ma and 131 �� 112 Ma. The authors summarized the types of molybdenum deposits and their tectonic setting�� types and age of magmatic rocks��and age of molybdenum deposits��and considered that the molybdenum deposits in the first stage occurred in continental extensional setting��and their formation possibly associated with its contemporary alkaline rocks. The metallogenic materials are likely originated from Dongpo Formation in Qinling orogenic belt based on the isotopes of Pb��Sr and Nd. The metallogenic elements are relatively simple��characterized by Pb or Au. The second staged deposits are possibly formed in the process of crust thickening��the remelting type and calc-alkaline rocks type I and the associated mainly with Fe and W. The third staged deposits formed in crustthinning setting��and the formation associated with potassium��high potassium or alkaline granitic rocks related to the lithosphere delamination and the upwelling of asthenosphere in eastern China. Metallogenic element is locally enriched W.