Metallogenic Geological Characteristics and Prospecting Direction of Fluorite Deposits in Xuancheng Area,Anhui Province
Xuancheng area is the main part of northern Jiangxi-southern Anhui-northwestern Zheji-ang fluorite ore concentration area.Fluorite ore resources are abundant,and the cumulative identified re-sources account for about 76%(mineral amount)of the province.It is an important fluorite metallogenic belt and mining base in Anhui Province.On the basis of systematic data collection and field investigation,com-bined with recent fluorite ore investigation,exploration progress and results,the metallogenic geological characteristics and prospecting direction of fluorite ore in this area are discussed and analyzed.The research shows that:the fluorite mineralization in the area has no obvious selectivity to the sedimentary formation.Flu-orite mineralization is closely related to the late Yanshanian intermediate-acid intrusions,the vast majority of fluorite deposits(points)are distributed in the late Yanshanian intermediate-acid intrusive body and its periphery within 2 km.Regional fault structure is a necessary condition for fluorite mineralization,and gen-eral fault is a necessary condition for fluorite mineralization,there are 1～2 dominant directions in each metallogenic area,Silicification,sericitization and chloritization are closely related to fluorite mineraliza-tion.On this basis,seven fluorite metallogenic areas are divided,and the prospecting potential of fluorite deposits in the area is analyzed,and pointed out the fluorite ore prospecting direction.
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