中文摘要：

东窝东铜多金属矿床位于羌塘地体南缘,班公湖-怒江成矿带西段,多龙铜金矿集区东侧,是新发现的重要找矿前景区。为进一步确定矿区成矿地质条件及找矿潜力,通过对矿区详细的地质调查和钻孔编录,运用离子探针（SHRIMP）对含矿斑岩进行锆石年代学研究,并利用等离子质谱仪（ICP-MS）对其进行地球化学和SrNd-Pb同位素分析。结果显示,东窝东矿区含矿斑岩结晶时代为122 Ma,是区域早白垩世成矿事件的产物,Sr-NdPb同位素组成（Sr初始值为0.7052^0.7062,143 Nd/144 Nd比值为0.512365^0.512409,εNd（t）值为-4.05^-3.88;^（206）Pb/^（204）Pb、^（207）Pb/^（204）Pb、^（208）Pb/^（204）Pb分别为18.691^18.823、15.638^115.796、38.649^38.924,揭示含矿斑岩岩浆源区有明显的壳幔混合,可能为来源于班怒洋俯冲环境下的新生下地壳。为科学判定矿区成矿潜力,解决矿区找矿瓶颈问题,综合分析矿区地质、物探（1/1万磁法和激电中梯测量）和化探（1/1万水系沉积物测量）成果后认为,东窝东矿区有良好的成矿地质条件,物、化探异常分布集中,叠合较好,存在重要找矿潜力,建议以斑岩-浅成低温热液型铜多金属矿床为勘查找矿方向。

英文摘要：

The Dongwodong copper polymetallic deposit is a newly discovered important prospect area,which is located in the southern margin of Qiangtang terrane,the western part of Bangong Co-Nujiang mineralization belt,near by the Duolong copper gold deposit cluster.In order to further analyze metallogenic geological conditions and prospecting potential of the Dongwodong deposit area,and based on the detail geological investigation and logging,this study carried out zircon chronology study of ore-bearing porphyry using ion probe（SHRIMP）and geochemical and Sr,Nd,Pb isotopic analysis using plasma mass spectrometer（ICP-MS）.The results indicate that the ore-bearing porphyry crystallization age is ca.122 Ma,suggesting it is the product of early Cretaceous metallogenic event in the Duolong deposit cluster.Sr,Nd,Pb isotopic analysis shows that initial Sr value ranges from 0.7052 to 0.7062,143 Nd/144 Nd ratio from 0.512365 to 0.512409,εNd（t）from-4.05to-3.88,^（206）Pb/^（204）Pb,^（207）Pb/^（204）Pb and ^（208）Pb/^（204）Pb are18.691^18.823,15.638^115.796,38.649^38.924 respectively,revealing that the ore-bearing porphyry is characterized by a crust-mantle mixing source and may be the juvenile crust derived from subduction environment of Bannu Ocean.After the comprehensive analysis of geological situation,geophysical（1/10000 magnetic survey and induced polarization survey）and geochemical（1/10000 stream sediment survey）exploration data,it has been concluded that the Dongwodong deposit has a good metallogenic condition and prospecting potential.It is suggested that porphyry-epithermal copper polymetallic metallogenic system should be the direction for deposit exploration.