| 广西德保铜锡矿床辉钼矿Re-Os同位素定年及对加里东期成矿的探讨 |
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| 引用本文：王永磊,王登红,张长青,屈文俊,胡艳春.2010.Molybdenite Re-Os isochron age of Debao Cu-Sn deposit in Guangxi and relation to Caledonian mineralization[J].Mineral Deposits,29(5):881~889 |
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| 基金项目:本文得到中央级公益性科研院所基本科研业务费专项资金资助项目（K0907）和全国危机矿山接替资源找矿项目（桂东-粤西地区铅锌金等矿床成矿规律总结研究，项目编码20089946）的联合资助 |
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| 中文摘要:广西德保铜锡矿床为一矽卡岩型矿床。笔者对采自该矿床的7件不同矿化类型的辉钼矿样品，进行了Re-Os同位素定年，获得的模式年龄为（429.5±5.9)～（440.0±6.9）Ma。其中，采自含矿石英脉的6件辉钼矿样品的Re-Os模式年龄加权平均值为（435.0±2.5）Ma，等时线年龄为（445±11）Ma，表明该地区曾于晚奥陶世—早志留世发生过成矿作用，是华南加里东运动的产物。文章提供了关于右江地区加里东期成矿作用的信息，深化了对该地区成矿演化历史的认识，进而强调了对于寻找钦甲式Cu_Sn矿床的意义。 |
| 中文关键词:地质学 Re-Os等时线 铜-锡矿床 加里东期 德保 广西 |
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| Molybdenite Re-Os isochron age of Debao Cu-Sn deposit in Guangxi and relation to Caledonian mineralization |
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| Abstract:The Debao Cu_Sn deposit is a skarn type deposit. Seven molybdenite-bearing samples of different mineralizing types were selected for precise Re-Os dating, and the dating results yielded model ages ranging from (429.5±5.9) to (440.0±6.9) Ma. The molybdenite from quartz veins yielded an isochron age of (445±11) Ma, which indicates that mineralization took place in the Late Ordovician to Early Silurian period. The results provide the information of Caledonian mineralization and deepen the understanding of the ore-forming evolutionary history in Youjiang area. The authors hold that the significance of looking for Qinjia-type Cu-Sn deposits should be emphasized in Youjiang area. |
| keywords:geology, Re-Os isochron, Cu-Sn deposit, Caledonian, Debao, Guangxi |
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