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中文摘要：
通过对鹦鹉岭铜多金属矿床6件辉钼矿样品的Re-Os同位素定年，获得的模式年龄为82．96Ma-84．75Ma。其中1件矽卡岩型矿石中辉钼矿的 187Re-187Os模式年龄为82．96Ma±1．2Ma，5件石英脉型矿石中辉钼矿的187Re-187Os模式年龄为83．78Ma～84．75Ma，加权平均值为84．08Ma±0．54Ma，对应的等时线年龄为83．0Ma±1．7Ma，模式年龄和等时线年龄结果在误差范围内基本一致，指示鹦鹉岭多金属矿床的成矿时限为82．96Ma～84．75Ma，即形成于晚白垩世。鹦鹉岭矿床辉钼矿样品的Re含量较低，表明其成矿物质主要来自于壳源。该矿床形成于燕山晚期岩石圈伸展减薄环境。
英文摘要：
Six molybdenite samples are selected from the Yingwuling copper polymetallic deposit to perform the Re-Os dating. It yielded weighted average model ages of 82.96 Ma to 84. 75 Ma, with a narrow range variation. It was showed that the Re-Os dating of one sample collected from skarn-type ore yielded a model age of 82.96 Ma±1. 2 Ma,and five molybdenite samples collected from quartz-vein-type ore yielded model ages ranging from 83.78 Ma to 84. 75 Ma,with an aver- age of 84.08 Ma±0. 54 Ma,and give an isochron age of 83.0 Mail. 7 Ma. Evidently, model ages are compatible with isochron age in the error within the allowable range, so it constrains the abso- lute age of Yingwuling copper polymetallic deposit in 82.96 Ma±84.75 Ma,namely,the Late Cre- taceous is the main time for the formation of ore. The molybdenites from Yingwuling copper poly- metallic deposit have a low content of Re,indicating a crustal source for ore-forming materials. It was considered that the deposit formed in the Late Yanshanian lithospheric extensional and thinning environment.
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