丰村铅锌矿赋矿地层微量元素地球化学特征

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。

Geochemical Characteristics of Trace Elements in Fengcun Lead-zinc Deposits

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.