REE Geochemical Characteristics of Fluorite in Fuxin Metallogenic Region and Its Geological Implications

In order to research the metallogenic characteristics of the Fuxin fluorite ore area,the paper discusses the REE geochemical characteristics.The results show that fluorites occur in Early Permian,Late Triassic and Late Jurassic granite with negative Ce anomaly and three types of the REE distribution patterns such as negative,normal and positive Eu anomaly for fluorite.The content of REE in fluorite does not increase with the fluorite content in the country rocks.The granite which interuded in late period is rich in light REE.Total REE content decreases gradually and the REE distribution pattern evolves from depleted Eu to enriched Eu from the early period to the late period.The content of SO2-4 in the mineral fluid inclusions and the liquid composition reduction parameter existing in Early Permian and Late Triassic indicate that ore-forming fluid has evolved from deoxidized condition to oxidized condition.The ore-forming material sources originate from the granite.