中文摘要：

铜山矿床是位于大兴安岭北段多宝山矿田中的一个大型铜矿床。文章对该矿区含矿英云闪长岩进行了详细的LA-MC-ICP-MS锆石U-Pb定年、主量元素、微量元素及同位素地球化学研究。锆石U-Pb定年结果表明,英云闪长岩侵位于（461±1）Ma。岩石显示埃达克质岩的地球化学特征,具有高w（Si O2）（62.5%~64.53%）和w（Al2O3）（14.77%~17.7%）,高w（Sr）（394×10-6~804×10-6）,低w（Y）（7.78×10-6~10.3×10-6）和w（Yb）（0.8×10-6~1.04×10-6）,轻稀土元素富集,重稀土元素亏损,无明显Eu异常。锆石εHf（t）值介于11.6~13.5。金属硫化物的δ34S值为-1.3‰~-0.4‰,206Pb/204Pb、207Pb/204Pb和208Pb/204Pb值分别为17.591~18.453、15.449~15.551和37.280~37.999。这些特征表明,铜山矿床英云闪长岩形成于大陆边缘弧环境,是加厚下地壳部分熔融的产物。成矿物质主要来自于英云闪长岩及多宝山组火山岩。

英文摘要：

The Tongshan deposit is a large copper deposit located in the Duobaoshan orefield within the northern Da Hinggan Mountains. This paper reports LA-MC-ICP-MS zircon U-Pb age, major and trace elements, and iso- topic geochemistry of the ore-related tonalite in the Tongshan deposit. LA-MC-ICP-MS zircon U-Pb dating yielded the crystallization age of （461 ± 1 ） Ma for the tonalite. The tonalite shows characteristics of adakitic affinity, i.e., high SiOz（62.5% -- 64.53% ）, A1203（14.77%--17.7% ） and Sr （394 × 10-6- 804 × 10-6）, low Y （7.78 × 10- 6 ~ 10.3 × 10- 6） and Yb （0.8× 10- 6 ~ 1.04 × 10-6）, slight Eu anomalies, rich light rare- earth elements and depleted heavy rare-earth elements. The zircon Hf isotope analysis shows EI-If （ t ） values of 11.6 to 13.5. ~34S values of sulfides are between - 1.3%0 and - 0.4%0, similar to data associated with mag-matic-hydrothermal systems. 206pb/204pb, 207pb/204pb and 208pb/204pb ratios vary from 17. 591 to 18. 453, 15.449 to 15.551, and 37.280 to 37.999, respectively. The tonalite was formed in a continental marginal arc setting, and originated from partial melting of the thickened lower crust. The ore-forming materials were de- rived from the volcanic rocks of the Duobaoshan Formation and tonalite.