大别山南麓梨木岭钼矿床辉钼矿Re-Os同位素年龄及地质意义

发布时间：2018-05-16 04:29

  本文选题：地球化学 + 辉钼矿Re-Os同位素测年　； 参考：《矿床地质》2017年04期

【摘要】：梨木岭钼矿床是近年来新发现的钼矿,也是目前大别山构造带唯一具有工业意义的中型钼矿床。通过辉钼矿Re-Os同位素年代学测定,获得梨木岭钼矿Ⅰ矿脉5件样品辉钼矿的Re-Os模式年龄为(115.3±1.4)Ma~(118.1±1.5)Ma,加权平均年龄为(116.8±1.3)Ma;等时线年龄为(119.9±6.2)Ma(MSWD=1.6)。Ⅱ矿脉2件辉钼矿Re-Os模式年龄分别为(114.7±1.6)Ma和(117.0±1.4)Ma。两条矿脉中辉钼矿样品的Re-Os模式年龄在误差范围内一致,表明这两条矿脉为早白垩世同期热液产物。梨木岭钼矿床可能为与早白垩世中酸性岩浆活动有关的岩浆热液型矿床。早白垩世大别山钼成矿作用不仅仅局限在北大别的北淮阳构造带,在大别山南麓同样存在该阶段钼成矿作用。
[Abstract]:The Limuling molybdenum deposit is a newly discovered molybdenum deposit in recent years, and it is also the only medium molybdenum deposit of industrial significance in the Dabie Mountain tectonic belt at present. Based on the Re-Os isotopic dating of molybdenum ore, the molybdenum model age of five molybdenum samples from Limueling molybdenum mine I is 115.3 卤1.4)Ma~(118.1 卤1.5MaA, the weighted average age is 116.8 卤1.3MaA, and the isochron age is 119.9 卤6.2MS-MSWD1.6.The 鈪，

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