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中文摘要：
大兴安岭旁开门金银矿床赋存在上侏罗统甘河组基性岩和下白垩统富林组中酸性火山岩中，其赋矿围岩蚀变流纹岩中单颗粒锆石u-Ph年龄测定表明，21个成分点中有1组不谐和年龄（141±2Ma、129±2Ma）和3组谐和年龄，后者的加权平均值分别为116．2±3．4Ma、112．5±1．1Ma和108．2±4．2Ma。结合锆石晶形和CL图像特征，进一步确定流纹岩的成岩时代为早白垩世晚期，岩浆房冷却到岩浆热液期经历约8Ma，成矿作用与富林组火山作用有关，发生在108Ma之后，其成矿与中国东北部陆缘晚中生代浅成热液金矿大规模成矿时代相一致。
英文摘要：
The Pangkaimen Au-Ag deposit in Great Xing＇an Range is concentrated in Upper Jurassic Ganhe Formation basic volcanic rocks and Lower Cretaceous Fulin Formation intermediate and intermediate-acid volcanic rocks. The single-zircon U-Pb ages for host surrounding altered rhyolite rocks are dated, and the 21 component dot can be subdivided four groups age： one group shows discordant age （141±2 Ma, 129± 2 Ma）, while three groups show concordant ages （the weighted averages as 116. 2 ±3.4 Ma, 112. 5± 1.1 Ma and 108.2 ±4. 2 Ma, respectively）. According to the crystalline shape of zircons and CL image characters, the rhyolite formed in late Early Cretaceous, and it took about 8 Ma from magma chamber cooled down to magmatic hydrothermal. Mineralization is related to volcanism of Fulin Formation, which happened later than 108 Ma. The mineralization occurred concurrently with the later Mesozoic large scale epithermal Au deposits of continental margin in northeastern China.
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