广西贺州福安银多金属矿两类石英脉地质地球化学特征对比研究  

Contrastive study on geological and geochemical characteristics of two types of quartz veins in Fu'an silver polymetallic deposit, Guangxi

作　　者：吴小雷[1] 钱建平[2] 陈宏毅[2] 

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004 [2]桂林理工大学地球科学学院,广西桂林541004

出　　处：《华南地质与矿产》2016年第1期51-58,共8页Geology and Mineral Resources of South China

基　　金：中国地质调查局项目"广东省矿产资源潜力评价(编号:1212011121016)""广东省矿产资源调查成果综合集成与服务产品开发(编号:12120114075101)";广西隐伏金属矿产勘查重点实验室基金项目(广西科技基础条件平台建设11-031-20);中国科学院地球化学研究所矿床地球化学国家重点实验室开放基金(编号:200913);广西黄金局地质找矿项目

摘　　要：通过对福安矿区进行1︰2000地质调查及构造地球化学找矿工作,确定了矿区出露Ⅰ型和Ⅱ型两种成因类型石英脉,并总结了两类石英脉的矿物组成、产状、形态、规模及产出位置。微量元素参数统计显示,Ⅰ型石英脉相对富集Cu、Pb、Zn、W、Mn、Mo、Sn、Ag、Co、As、Sb、Bi、Au元素;Ⅱ型石英脉相对富集铁族元素Cr、Ni、V、Ti。聚类分析及对应分析表明,Ⅰ型石英脉与成矿关系密切,且成矿具多阶段性;Ⅱ型石英脉有后期成矿事件一定程度的叠加。稀土元素分析显示,Ⅰ型石英脉稀土元素总含量较低,分异较弱,说明其形成于深源,为岩浆热液成因;Ⅱ型石英脉稀土元素具LREE的特征反映了其浅源的成因,为构造动力压泌作用形成,来自于围岩。According to 1： 2000 geologica1 survey and the tectono-geochemical prospecting work in the studyarea,the authors summed up the mineral composition, occurrence, morphology , size and occurring location of twotypes of quartz veins. The statistical analysis of trace element parameters show that Ⅰ- type quartz vein are richin iron group elements such as Cu, Pb, Zn, W, Mn, Mo, Sn, Ag, Co, As, Sb, Bi, Au and Ⅱ-type quartz veins arerich in iron group elements such as Cr, Ni, V, Ti. Cluster analysis and correspondence analysis show thatⅠ-typequartz vein is close to the ore-forming process and a multi-stage mineralization; Ⅱ-type quartz vein have somedegree of post-mineralization event superimposed. REE analysis show that lower total REE content and differentiationis weak in Ⅰ-type quartz vein, indicating that formed in the deep source of hydrothermal magmatic; Ⅱ-Type quartz vein characteristics with LREE, suggesting that which from the surrounding rock belong to tectonicbedding foliation.

关 键 词：石英脉 对应分析 构造动力压泌作用 福安银多金属矿床 广西 

分 类 号：P618.52[天文地球—矿床学]