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秦燕, 梅玉萍, 王登红, 张建, 吴礼彬. 安徽滁州琅琊山铜矿辉钼矿铼-锇同位素定年及其地质意义[J]. 岩矿测试, 2009, 28(3): 259-264.
引用本文: 秦燕, 梅玉萍, 王登红, 张建, 吴礼彬. 安徽滁州琅琊山铜矿辉钼矿铼-锇同位素定年及其地质意义[J]. 岩矿测试, 2009, 28(3): 259-264.
QIN Yan, MEI Yuping, WANG Denghong, ZHANG Jian, WU Libin. Re-Os Isotopic Dating of Molybdenite from the Langyashan Copper Deposit in Chuzhou of Anhui Province and Its Geological Significance[J]. Rock and Mineral Analysis, 2009, 28(3): 259-264.
Citation: QIN Yan, MEI Yuping, WANG Denghong, ZHANG Jian, WU Libin. Re-Os Isotopic Dating of Molybdenite from the Langyashan Copper Deposit in Chuzhou of Anhui Province and Its Geological Significance[J]. Rock and Mineral Analysis, 2009, 28(3): 259-264.

安徽滁州琅琊山铜矿辉钼矿铼-锇同位素定年及其地质意义

Re-Os Isotopic Dating of Molybdenite from the Langyashan Copper Deposit in Chuzhou of Anhui Province and Its Geological Significance

  • 摘要: 首次运用铼-锇同位素方法对滁州琅琊山铜矿床中的辉钼矿进行定年。5件辉钼矿样品的模式年龄为(128.9±1.8) Ma~(130.3±1.9) Ma,187Re-187Os等时线年龄为(128.6±2.2) Ma,其加权平均方差(MSWD)为0.45,为滁州琅琊山铜矿床提供了准确的形成时限。分析结果表明,滁州琅琊山铜矿床是早白垩纪(燕山晚期)区域构造-岩浆活动的产物。琅琊山铜矿床辉钼矿中铼含量较高,推断成矿物质主要是壳幔混源,且主要是幔源。

     

    Abstract: A precise Re-Os age is given for the Langyashan copper deposit in Chuzhou. The model age for five molybdenite samples from the deposit varies from (128.9±1.8) Ma to (130.3±1.9) Ma and the isochron age is (128.6±2.2) Ma, MSWD=0.45. The results indicate that the origin of the deposit is from regional tectno-magmatic activities during the early cretaceous period. The molybdenites from the Langyashan copper deposit have a very high Re content, which indicates that the deposit originated from the mixing of the crust and the mantle sources with the mantle as a primary source.

     

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