云南禄劝噜鲁铅锌矿床铷-锶同位素年代学与硫、铅同位素地球化学特征
发布时间：2019-06-22 19:43
【摘要】：云南禄劝噜鲁铅锌矿床地处扬子地块西南缘,矿体赋存于下寒武统梅树村组下段,呈脉状、似层状产出。矿石矿物主要有方铅矿、闪锌矿、黄铁矿等;脉石矿物主要有重晶石、石英、方解石。噜鲁铅锌矿床硫化物成矿时的~(87)Sr/~(86)Sr值为0.7112~0.7115,暗示成矿物质可能来自于基底地层;Rb-Sr等时线年龄为202.8±1.4Ma,成矿年龄为印支晚期—燕山早期。硫化物硫同位素组成δ~(34)S变化范围为6.33‰~9.75‰,暗示成矿流体中的硫主要是海相硫酸盐热化学还原的产物;铅同位素~(206)Pb/~(204)Pb、~(207)Pb/~(204)Pb、~(208)Pb/~(204)Pb变化范围分别为18.259~18.342、15.608~15.639、38.46~38.821,位于上地壳和造山带铅演化线之间,落入基底岩石(昆阳群)及不同时代碳酸盐岩铅同位素组成范围内,表明成矿物质具有壳源特征,主要由基底岩石提供。综合各类地质-地球化学信息认为,噜鲁铅锌矿床成矿流体中不同组分来源不同,但主要来自于基底地层,成矿机制是在印支运动强驱动力的作用下,促使含矿基底地层成矿元素活化-迁移混合-空间就位,形成工业矿床。
[Abstract]:The Lulu lead-zinc deposit in Luqianlu, Yunnan Province is located in the southwest margin of the Yangtze block, and the orebody occurs in the lower member of the Meishucun formation of the Lower Cambrian, which is vein-like and layered. Ore minerals mainly include galena, sphalerite, pyrite and so on, while gangue minerals mainly include barite, quartz and calcite. The ~ (87) Sr/~ _ (86) Sr value of sulphide mineralization in Lulu lead-zinc deposit is 0.7112 鈮，
本文编号：2504903
[Abstract]:The Lulu lead-zinc deposit in Luqianlu, Yunnan Province is located in the southwest margin of the Yangtze block, and the orebody occurs in the lower member of the Meishucun formation of the Lower Cambrian, which is vein-like and layered. Ore minerals mainly include galena, sphalerite, pyrite and so on, while gangue minerals mainly include barite, quartz and calcite. The ~ (87) Sr/~ _ (86) Sr value of sulphide mineralization in Lulu lead-zinc deposit is 0.7112 鈮，
本文编号：2504903
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