| 辽宁树基沟铜锌矿成矿时代及矿石再活化机制 |
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| 引用本文： | 张雅静,孙丰月,霍亮,李碧乐,马芳,钱烨,刘哲东.辽宁树基沟铜锌矿成矿时代及矿石再活化机制[J].吉林大学学报(地球科学版),2014,44(3):786. |
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| 作者姓名： | 张雅静 孙丰月 霍亮 李碧乐 马芳 钱烨 刘哲东 |
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| 作者单位： | 1.吉林大学地球科学学院，长春130061;
2.中煤地质工程总公司，北京100161 |
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| 基金项目： | 国家自然科学基金项目(41272093);全国危机矿山接替资源找矿项目(20089940) |
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| 摘 要： | 树基沟铜锌矿是产于太古宙绿岩带中的与火山岩有关的块状硫化物（VMS）矿床，运用LA-ICP-MS锆石U-Pb定年得到含矿围岩(黑云斜长片麻岩原岩)的结晶年龄约为2 565 Ma，近似代表树基沟矿体的形成时代。后期变质变形作用使矿石结构构造发生了巨大的变化，形成变质变形作用特有的结构构造,有变斑晶结构、硫化物生长结构、碎裂结构、旋转碎斑结构、充填和交代结构以及退变质结构等。成矿组分的两期再活化过程对应了两期变质变形事件：第一期变质变形过程中，矿石以机械再活化迁移为主，并在压力小的位置形成“铜矿囊”；第二期变质变形过程中，矿石的活化方式呈现出复合再活化的特点，具体表现为黄铁矿变斑晶颗粒被再活化的石英-硫化物细脉充填，并发育一定程度的交代作用。
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| 关 键 词： | 结构构造 再活化机制 铜锌矿 成矿时代 树基沟 辽宁 |
| 收稿时间： | 2013-11-30 |
Metallogenic Age and Ore Remobilization Mechanisms of Shujigou Coper-Zinc Deposit,Liaoning Province,China |
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| Zhang Yajing,Sun Fengyue,Huo Liang,Li Bile,Ma Fang,Qian Ye,Liu Zhedong.Metallogenic Age and Ore Remobilization Mechanisms of Shujigou Coper-Zinc Deposit,Liaoning Province,China[J].Journal of Jilin Unviersity:Earth Science Edition,2014,44(3):786. |
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| Authors: | Zhang Yajing Sun Fengyue Huo Liang Li Bile Ma Fang Qian Ye Liu Zhedong |
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| Institution: | 1.College of Earth Sciences, Jilin University, Changchun130061, China;
2.China Coal Geology Engineering Corporation, Beijing100161, China |
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| Abstract: | Located in the Archean greenstone belt, the Shujigou copper-zinc deposit belongs to the volcanic-associated massive sulfide deposit (VMS). By LA-ICP-MS zircon U-Pb dating, it’s conformed that the ore-hosting biotite-gneiss was formed at ca. 2 565 Ma, which can also represent the ore-forming age. Multiple phase of metamorphism resulted in changing of ore textures and forming of such special textures as recrystallization, brittle deformation, durchbewegung, replacement and retrograde textures. The ore-forming components have undergone two periods of remobilization which corresponds to two phases of metamorphism and deformation events. The earlier, during the Anshan tectonic movement, mechanical remobilization played an important role, and formed “ore capsule” in the position of small pressure. The later, during the Lüliang tectonic movement, both mechanical remobilization and chemical remobilization affected the ore, the matrix sulphides and silicate minerals, moved from the matrix into the fractured individual pyrite metablasts and have replaced them to some degrees. |
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| Keywords: | texture and structure remobilization mechanism copper-zinc deposit metallogenic age Shujigou Liaoning Province |
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