| 内蒙古莲花山铜矿区花岗闪长斑岩LA-ICP-MS锆石U-Pb年龄 |
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| 引用本文： | 王忠禹,孙景贵,白令安,柴 鹏,古阿雷,赵克强,李玉洁.内蒙古莲花山铜矿区花岗闪长斑岩LA-ICP-MS锆石U-Pb年龄[J].地质通报,2014,33(9):1320-1325. |
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| 作者姓名： | 王忠禹 孙景贵 白令安 柴 鹏 古阿雷 赵克强 李玉洁 |
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| 作者单位： | 1.吉林大学地球科学学院，吉林 长春 130061;
2.桂林理工大学地球科学学院，广西 桂林 541004;
3.吉林农业大学生命科学学院，吉林 长春 130000 |
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| 基金项目： | 国家自然科学基金项目(批准号:40772052、41172072) |
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| 摘 要： | 为了精确厘定莲花山铜矿的成矿时代,在前人研究的基础上,开展了与成矿关系密切的花岗闪长斑岩锆石U-Pb定年测定。实验结果共获得4组年龄数据,第1组有1个锆石,206Pb/238U年龄为343Ma±2Ma;第2组1个锆石,206Pb/238U年龄为264Ma±2Ma;第3组有1个锆石,206Pb/238U年龄为256Ma±2Ma;第4组有17个锆石,206Pb/238U年龄在240~249Ma之间,206Pb/238U年龄加权平均值为246.4Ma±1.2Ma(N=17)。结合所测锆石的CL图像特征,确定花岗闪长斑岩就位发生在晚二叠世—早三叠世。
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| 关 键 词： | 花岗闪长斑岩 LA-ICP-MS锆石U-Pb定年 成岩成矿环境 莲花山铜矿 大兴安岭 |
LA-ICP-MS zircon U-Pb dating of granodiorite porphyry in the Lianhuashan copper deposit of Inner Mongolia and its geological implications |
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| WANG Zhong-yu,SUN Jing-gui,BAI Ling-an,CHAI Peng,GU A-lei,ZHAO Ke-qiang,LI Yu-jie.LA-ICP-MS zircon U-Pb dating of granodiorite porphyry in the Lianhuashan copper deposit of Inner Mongolia and its geological implications[J].Geologcal Bulletin OF China,2014,33(9):1320-1325. |
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| Authors: | WANG Zhong-yu SUN Jing-gui BAI Ling-an CHAI Peng GU A-lei ZHAO Ke-qiang LI Yu-jie |
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| Institution: | 1. College of Earth Sciences, Jilin University, Changchun 130061, Jilin, China;
2. College of Earth Sciences, Guilin University of Technology, Guilin 541004, Guangxi, China;
3. College of Life Sciences, Jilin Agricultural University, Changchun 130000, Jilin, China |
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| Abstract: | On the basis of previous studies, this paper carried out zircon U-Pb dating for mineralization-associated granodiorite porphyry to further study its metallogenic epoch. Four groups of ages were obtained. The first group contains one zircon with 206Pb/238U age of 343Ma±2Ma; the second group contains one zircon with 206Pb/238U age of 264Ma±2Ma; the third group contains one zircon with 206Pb/238U age of 256Ma±2Ma; the fourth group comprises 17 zircons, whose 206Pb/238U ages vary from 240Ma to 249Ma, with a weighted mean 206Pb/238U age of 246.4Ma±1.2Ma (N=17). In conjunction with characteristics of CL imaging, the authors hold that the emplacement of granodiorite porphyry occurred between the Late Permian and Early Triassic. |
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| Keywords: | granodiorite porphyry LA-ICP-MS zircon U-Pb dating rock-forming and ore-forming environment Lianhuashan copper deposit Da Hinggan Mountains |
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