福建闽侯马厝铍矿地质特征及成因初探  

Preliminary Study on Geological Characteristics and Genesis of Macuo Beryllium Deposit in Minhou County,Fujian Province

作　　者：王衍勋 Wang Yanxun(Fujian Institute Of Geology Survey,Fuzhou,350013)

机构地区：[1]福建省地质调查研究院,福州350013

出　　处：《福建地质》2025年第1期21-27,共7页Geology of Fujian

基　　金：中国地质调查局项目“福建煕岭—廷坪地区矿产远景调查、福建三稀资源综合研究与重点评价”。

摘　　要：福建闽侯马厝铍矿位于东南沿海铍找矿远景区,在近年来土壤地球化学测量发现了Be、Mo等元素异常的基础上,通过异常查证、探槽揭露和分析研究,确认属于与火山-侵入杂岩相关的铍矿床。马厝矿区的铍矿体贮存于晚侏罗世南园组二段流纹质晶屑凝灰岩中,受北东向断裂及其次级裂隙控制,呈脉状、透镜状产出。与铍矿化相关的围岩蚀变主要包括硅化、绢英岩化、黄铁矿化、萤石化及镜铁矿化等。矿石矿物主要有绿柱石和羟硅铍石,分布于石英脉和蚀变火山岩的裂隙中。综合分析认为,深部来源的富铍热液沿构造破碎带及其派生裂隙交代蚀变凝灰岩形成铍矿(化)体,属于热液充填-交代型铍矿床。The beryllium deposit in Macuo area,Minhou County,Fujian Province is located in the southeast coast of the prospective beryllium prospecting area.Based on the anomaly of Be,Mo and other elements discovered in recent years by soil geochemical survey,it is confirmed that it belongs to the beryllium deposit related to the volcano-intrusive complex through anomaly verification,exploration trough disclosure and analysis.The Be orebodies are mainly hosted by rhyolitic crystal tuff of the second member of the Late Jurassic Nanyuan Formation,and occur as vein-and lenticular-shape which controlled by northeast-trending faults and their secondary fractures.The surrounding rock alteration related to beryllium mineralization mainly includes silicification,sericitization,pyritization,fluorophorization and specularization.The ore minerals are mainly beryl and hydroxylberyllium,distributed in quartz veins and fractures of altered volcanic rocks.Comprehensive analysis shows that beryllium-rich hydrothermal fluid from deep source forms beryllium deposits along the tectonic fracture zone and its derivative fissure metasomatic tuff,which belongs to the hydrothermal filling and metasomatic beryllium deposits.

关 键 词：马厝铍矿 东南沿海成矿带 成矿特征 矿床成因 福建闽侯 

分 类 号：P618.72[天文地球—矿床学]