| 赣南园岭寨钼矿辉钼矿Re-Os年龄及其地质意义 |
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| 引用本文：周雪桂,吴俊华,屈文俊,龚敏,袁承先,廖明和,赵赣,李牟,魏俊浩,马振东.2011.Re-Os dating of molybdenites from Yuanlingzhai molybdenum deposit in southern Jiangxi Province and its geological significance[J].Mineral Deposits,30(4):690~698 |
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| 基金项目:本文得到中国地质调查局“全国重要矿产资源潜力预测评价”子项目（1212010733805）的资助 |
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| 中文摘要:赣南园岭寨钼矿为产在花岗斑岩与寻乌岩组变质岩内外接触带的大型斑岩型钼矿床。对矿区含矿石英脉中5个辉钼矿样品进行Re-Os同位素测定，获得等时线年龄及模式年龄的加权平均值分别为（161.1±3.9）Ma和（162±1）Ma。等时线初始187Os值为（0±2）ng/g，MSWD=0.50。园岭寨钼矿形成于中侏罗世中晚期，其成矿年龄对应于华南中晚侏罗世第二成矿阶段（170～150 Ma），与区域内160 Ma左右的钨锡矿成矿作用时间基本一致。区域上，华南钼矿的成矿时间具有连续性，在165～130 Ma均有发生。 |
| 中文关键词:地球化学 园岭寨钼矿 辉钼矿 Re-Os同位素 赣南 |
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| Re-Os dating of molybdenites from Yuanlingzhai molybdenum deposit in southern Jiangxi Province and its geological significance |
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| Abstract:Located in the inner and outer contact zones between granite porphyry and metamorphic rocks of Xunwuyan Formation, the Yuanlingzhai molybdenum deposit is a large-sized porphyry molybdenum deposit in southern Jiangxi Province. Re-Os isotopic dating of 5 molybdenite samples from the mineralized quartz veins of this ore deposit has yielded a precise isochron age of (161.1±3.9) Ma and a weighted average model age of (162±1) Ma. The intercept of isochron is (0±2) ng/g, and the MSWD is 0.50. The Yuanlingzhai molybdenum deposit was formed in mid-late Middle Jurassic, and its metallogenic age corresponds to the second ore-forming stage (170～150 Ma) in the Late Jurassic in South China, consistent to regional tungsten-tin mineralization ages around 160Ma. Molybdenum mineralization occurred in the range of 165～130 Ma in South China. |
| keywords:geochemistry, Yuanlingzhai molybdenum deposit, molybdenite, Re-Os isotope, southern Jiangxi Province |
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