安徽宣城地区萤石矿成矿地质特征及找矿方向  

Metallogenic Geological Characteristics and Prospecting Direction of Fluorite Deposits in Xuancheng Area,Anhui Province

作　　者：魏国辉[1] 蔡晓兵[1] 杜玉雕[1] 李加好[2] 杨金龙[3] 郭泳杰 徐波 WEI Guohui;CAI Xiaobing;DU Yudiao;LI Jiahao;YANG Jinong;GUO Yongjie;XU Bo(Geological Survey of Anhui Province(Institute of Geological Sciences of Anhui Province);School of Resources and Environmental Engineering,Hefei University of Technology;311 Geological Team,Bureau of Geology and Mineral Exploration of Anhui Province)

机构地区：[1]安徽省地质调查院(安徽省地质科学研究所),安徽省合肥市230001 [2]合肥工业大学资源与环境工程学院 [3]安徽省地质矿产勘查局311地质队

出　　处：《现代矿业》2024年第8期28-35,共8页Modern Mining

基　　金：安徽省公益性地质工作项目(编号:2021-g-1-3);安徽省自然资源科技项目(编号:2023-k-14);安徽省地质勘查基金项目(编号:2022-1-15)。

摘　　要：宣城地区是赣北—皖南—浙西北萤石矿集区的主要组成部分,萤石矿资源丰富,累计查明资源量占全省约76%(矿物量),是安徽省重要的萤石成矿区带和开采基地。在系统地资料收集和野外调查的基础上,并结合近期萤石矿调查、勘查进展和成果,对该区萤石矿成矿地质特征及找矿方向进行了讨论分析。研究表明:区内萤石矿成矿对沉积建造并没有明显的选择性;萤石矿成矿与燕山晚期中酸性侵入体关系密切,绝大多数萤石矿床(点)分布在燕山晚期中酸性侵入体及其外围2 km范围内;区域性断裂构造是萤石矿成矿的必要条件,一般性断裂是萤石矿成矿赋矿的必要条件,在每个成矿区内控矿赋矿构造有1~2个优势方向;硅化、绢云母化、绿泥石化等与萤石矿成矿关系密切。在此基础上,划分了7个萤石矿成矿区,分析了区内萤石矿找矿潜力,并指出了萤石矿找矿方向。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.

关 键 词：萤石矿 成矿地质特征 找矿潜力 找矿方向 

分 类 号：P619.215[天文地球—矿床学]