中文摘要：

针对滇东北峨眉山玄武岩分布区铜矿中矿石矿物及玄武岩的微量元素Co,Cr,Ni,Pb,Th,U以及铅同位素组成进行研究,结果显示：在玄武岩和矿石中,Pb平均丰度分别为7.87×10^-6和7.13×10^-6,Th平均丰度分别为5.27×10^-6和6.27×10^-6,U平均丰度分别为1.16×10^-6和0.97×10^-6;从Th,U,Pb的质量分数揭示了玄武岩和矿石物源的相似性;Co,Cr,Ni的质量分数除矿石Cr略低外,玄武岩和矿石的Co和Ni均大于上部地壳平均值,提供了成矿物质非上部地壳来源的信息;铜矿石中主要矿物铅同位素组成（206Pb/204Pb平均18.3442、07Pb/204Pb平均15.620 22、08Pb/204Pb平均38.653 9）与玄武岩铅同位素组成（206Pb/204Pb平均18.805 32、07Pb/204Pb平均15.602 72、08Pb/204Pb平均39.250 8）相似,在206Pb/204Pb-207Pb/204Pb和206Pb/204Pb-208Pb/204Pb图中,二者铅同位素组成呈线性排列,从而在铅同位素示踪上显示了二者具有相同的铅源。由此判定滇东北峨眉山玄武岩区3类铜矿的成矿物质是源自于该区的玄武岩。

英文摘要：

To further discuss the metallogenic material source of copper deposits in the district of Emeishan flood basalts in northeastern Yunnan province,the authors study the trace elements of Co,Cr,Ni, Pb,Th, U and pb-isotope compositions of the mineral in ore and basalts of country rocks. Average Pb contents are 7.87×10^-6 and 7.13×10^-6 ,Th contents are 5.27×10^-6 and 6.27 × 10^-6,U contents are 1.16×10^-6 and 0. 97 × 10^-6 respectively. The contents of Th,U,Pb indicate that the material sources of ore and hasalts are similar. The contents of Co,Cr,Ni show that Cr content is lower, though Co, Ni values are higher than that of upper-crust, which illustrates that the metallogenic material are not coming from upper-crust. Ph-isotope compositions of the main mineral in copper ore are as follows：average ^206 pb/^204 Pb value is 18. 344, average ^207 pb/^204 Pb value is 15. 620 2, average ^208Ph/^204 Pb value is 38. 653 9, which are similar to those of basahs（average ^206Pb/^204pb value is 18. 805 3 ,average ^207Pb/^204pb value is 15. 602 7 ,average ^208Pb/^204pb value is 39. 250 8）. In the diagram of ^206Pb/^204Ph versus to ^207Pb/^204pb and ^206Pb/^204 Pb versus to ^208Ph/^204pb,the data dots show linear relationship, which indicates the same Pb source between the basalts and copper ore. So it is concluded that the metallogenic material of the three types of copper deposits lying in the district of Emeishan flood basalts coming from the local basalt.