广东梅子冲铅锌钨多金属矿床流体包裹体特征及成矿作用  

Characteristics of Fluid Inclusions and Metallogenesis of the Meizichong Pb-Zn-W Polymetallic Deposit in Guangdong Province

作　　者：唐一昂 赖健清[1] 杨牧[1] 梅嘉靖[1] 吴剑 谌后成 郭兰萱 

机构地区：[1]中南大学,有色金属成矿预测与地质环境监测教育部重点实验室,地球科学与信息物理学院,湖南长沙410083 [2]中国黄金集团地质有限公司,北京100011 [3]广东省有色金属地质局九三二队,广东韶关512026 [4]广东省有色地质勘查院,广东广州510080

出　　处：《地质与勘探》2017年第2期217-226,共10页Geology and Exploration

基　　金：中国地质调查局“整装勘查关键基础地质研究”计划项目(编号:12120114052701);中南大学“创新驱动项目”(编号2015CX008)资助

摘　　要：梅子冲铅锌钨多金属矿床位于广东省韶关市一六矿区。野外调查和室内显微镜鉴定表明,梅子冲矿床成矿作用分为两期五阶段,第一期为矽卡岩期,可以分为早期矽卡岩阶段(A1)、晚期矽卡岩阶段(A2)和钾长石白钨矿阶段(A3);第二期为热液期,可以分为石英硫化物阶段(B1)和石英碳酸盐阶段(B2)。矿体的石英和白钨矿中含有富液相的气液两相流体包裹体,地质特征结合包裹体测温资料表明,成矿温度介于207℃~449℃,盐度为1.16%~12.4%,反映矿床形成于中-高温环境。成矿流体特征及成矿温度的演化表明,A1+A2至A3阶段的流体混合作用可能导致了白钨矿的形成,A3至B1阶段的流体混合作用可能促进了铅锌矿的形成。The Meizichong Pb-Zn-W polymetallic deposit is located in the Yiliu mining area, Shaoguan, Guangdong Province. Field geological investigations and microscope characteristics suggest that the mineralization of this deposit can be divided into 2 episodes, namely skarn episode（A） and hydrothermal episode（B）. The former can be subdivided into early skarn stage （A1）, late skarn stage （A2） and K-feldspar-tungsten stage （A3）, while the latter is subdivided into quartz-sulfide stage （B1） and quartz-carbonate stage （B2）. Liquid-rich inclusions were observed in quartz and tungsten from ores. Geological characteristics and micro-thermometric data show that ore-forming temperatures range from 207℃ to 449℃, while salinities range from 1.16% to 12.4%, indicating that the deposit was formed in a medium-high temperature environment. The fluid mixing from A1＋A2 stage to A3 stage might lead to the W precipitation and the fluid mixing from A3 stage to B1 stage might result in the Pb-Zn precipitation.

关 键 词：流体包裹体 成矿作用 矽卡岩 成矿流体 梅子冲铅锌钨多金属矿 广东 

分 类 号：P618.4[天文地球—矿床学] P611.1[天文地球—地质学]