丰村铅锌矿赋矿地层微量元素地球化学特征  

Geochemical Characteristics of Trace Elements in Fengcun Lead-zinc Deposits

作　　者：李兴远[1,2,3] 周永章[1,2,3] 安燕飞[1,2,3] 吕文超[1,2,3] 白明亮[1,3] 

机构地区：[1]广东省地质过程与矿产资源探查重点实验室 [2]中山大学地球科学系 [3]中山大学地球环境与地球资源研究中心

出　　处：《金属矿山》2013年第8期80-83,共4页Metal Mine

基　　金：国家重要成矿带矿产远景调查重大项目(编号:1212011085412)

摘　　要：对丰村铅锌矿东岗岭组灰岩进行微量元素测试分析,结果表明:Mn含量为(208.3～3 191)×10-6,平均为1 027.42×10-6,大约是中国沉积岩石丰度的4倍,Sr含量为(28.69～488.9)×10-6,平均为300.45×10-6。w(Sr)/w(Ba)>1,可能是正常海相沉积,而且,w(Sr)/w(Cu)值一般都远大于10,说明该组灰岩沉积时处于封闭、干燥、缺氧的还原环境;Pb、Zn均明显高于地壳丰度,推测东岗岭组灰岩可能是其主要矿源层,少部分样品w(U)/w(Th)>1,暗示后期受热液改造,丰村铅锌矿具有沉积叠加热液改造型矿床的特点。According to the survey and analysis of trace elements in Donggangling limestone of Fengcun lead-zinc mine,the results show： Mn content ranges from 208.3 × 10-6 to 3 191 × 10-6,with the average Mn content of 1 027.42 × 10-6;Sr content ranges from 28.69 × 10-6 to 488.9 × 10-6,with the average Sr content of 300.45 × 10-6.w（Sr） / w（Ba） 1,it may be the normal marine sediments.And,w（Sr） / w（Cu） is generally greater than 10,indicating that the sedimentary of limestone is in a closed,dry,anoxic reduction environment.The Pb,Zn contents are significantly higher than the crustal abundance.It is inferred that Donggangling limestone is the main source of the ore.Besides,based on the w（U） / w（Th） 1 in some ore samples,it indicates that Fengcun lead-zinc deposit has the characteristics of sedimentary superimposed hydrothermal reformation type deposit,resulting from the hydrothermal reformation at latter period.

关 键 词：丰村铅锌矿床 东岗岭组灰岩 微量元素 沉积环境 热液改造 

分 类 号：TD952.2[矿业工程—选矿]