Abstract: The contact metasomatic magnetite deposit in HandanXingtai Region is mainly hosted in the contact zone of the carbonate rocks in the Yanshannian neutral intrusive rocks and Ordovician groups,and generally associated with Co.Through the study of the ore quality characteristics,it is show that Co is mainly enriched in pyrite with isomorphism type,especially for the generation pyrite with the highest Co content,Co content is positively correlated with the S content in ores.The Co distribution regularity is closely related to the deposit genesis in the same deposit,generally speaking,the Co content of the upper of deposit is higher than that of the lower of the deposit.According to the analysis of deposit genesis of Co and Ni contents of ores,it is inferred that the Co source of the ores is magmatic hydrothermal.With the development and improvement of mining techniques and mineral processing techniques,it is of great significance to strength the comprehensive utilization study of associated Co of the contact metasomatic magnetite deposit in HandanXingtai Region,so as to provide some reliable reference for the comprehensive recovery of mineral resources.

Key words: Contact metasomatic magnetite deposit, Occurrence characteristics, Ore quality, Isomorphism