| 黑龙江多宝山斑岩Cu-Mo矿床成岩成矿时代研究 |
| |
| 引用本文： | 向安平,杨郧城,李贵涛,佘宏全,关继东,李进文,郭志军.黑龙江多宝山斑岩Cu-Mo矿床成岩成矿时代研究[J].矿床地质,2012,31(6):1237-1248. |
| |
| 作者姓名： | 向安平 杨郧城 李贵涛 佘宏全 关继东 李进文 郭志军 |
| |
| 作者单位： | 中国地质科学院矿产资源研究所 国土资源部成矿作用与资源评价重点实验室, 北京 100037;中国地质科学院矿产资源研究所 国土资源部成矿作用与资源评价重点实验室, 北京 100037;内蒙古地质 矿产开发局, 内蒙古 呼和浩特 010020;中国地质科学院矿产资源研究所 国土资源部成矿作用与资源评价重点实验室, 北京 100037;内蒙古第六地质矿产勘查开发院, 内蒙古 海拉尔 021008;中国地质科学院矿产资源研究所 国土资源部成矿作用与资源评价重点实验室, 北京 100037;中国地质科学院矿产资源研究所 国土资源部成矿作用与资源评价重点实验室, 北京 100037 |
| |
| 基金项目： | 本文为地质调查项目(N1014)、"十一五"国家科技支撑计划重大项目(编号: 2006BAB01A10)和国家基础科研项目(编号: 2013CB429800)联合资助成果 |
| |
| 摘 要： | 多宝山斑岩型铜(钼)矿床是中国东北地区重要的斑岩型铜(钼)矿床,文章对矿区主要成矿岩体及辉钼矿样品进行了系统的成岩成矿年代学研究。对成矿岩体采用高精度LA-ICP-MS锆石U-Pb测年,获得成矿母岩花岗闪长斑岩的锆石U-Pb年龄为(474.8±4.7) Ma,矿体寄主岩石花岗闪长岩的锆石U-Pb年龄为(478.1±4.1) Ma,以及矿体外围黑云母花岗闪长岩的锆石U-Pb年龄为(483.9±4.5) Ma;矿体辉钼矿的Re-Os同位素模式年龄加权平均值为(475.1±5.1) Ma。测年结果显示,多宝山斑岩铜(钼)矿床形成于早奥陶世。结合含矿地层、矿区岩石组合特征,以及前人研究的岩石地球化学特征,推测多宝山矿床形成于早奥陶世与板块俯冲有关的岛弧环境,说明在区域上寻找类似多宝山的斑岩铜矿应沿早奥陶世多宝山-伊尔斯岩浆岛弧带开展。
|
| 关 键 词： | 地球化学 LA-ICP-MS锆石U-Pb测年 Re-Os测年 岛弧 多宝山斑岩型铜(钼)矿床 |
| 收稿时间： | 2011/11/17 0:00:00 |
| 修稿时间： | 2012/11/1 0:00:00 |
Diagenetic and metallogenic ages of Duobaoshan porphyry Cu-Mo deposit in Heilongjiang Province |
| |
| XIANG AnPing,YANG YunCheng,LI GuiTao,SHE HongQuan,GUAN JiDong,LI JinWen and GUO ZhiJun.Diagenetic and metallogenic ages of Duobaoshan porphyry Cu-Mo deposit in Heilongjiang Province[J].Mineral Deposits,2012,31(6):1237-1248. |
| |
| Authors: | XIANG AnPing YANG YunCheng LI GuiTao SHE HongQuan GUAN JiDong LI JinWen and GUO ZhiJun |
| |
| Institution: | MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Inner Mongolia Bureau of Geology and Mineral Resources Development, Hohhot 010020, Inner Mongolia, China;MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;No.6 Institute of Geology and Mineral Exploration of Inner Mongolia, Hailar 021008, Inner Mongolia, China;MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China |
| |
| Abstract: | The Duobaoshan porphyry Cu-Mo deposit is an important Cu deposit in Northeast China. Systematic isotope dating was conducted to determine the metallogenic age of the deposit. LA-ICP-MS zircon U-Pb dating indicates that the parent granite-porphyry rocks and the host rocks intruded at (474.8±4.7) Ma and (478.1±4.1) Ma, respectively, the biotite granodiorite outside the parent granite-porphyry was formed at (483.9±4.5) Ma. Meanwhile, seven Re-Os isotopic analyses of molybdenite yield a weighted average model age of (475.1±5.1) Ma. These data show that the ore-forming process and the intrusion of the host rocks were completed in the early Ordovician. According to the ages of mineralization and intrusion of host rocks, the sedimentary setting of the Duobaoshan Formation and the geochemical characteristics of rocks hosting the deposit, the authors hold that the porphyry Cu-Mo deposit was formed in an island arc regime related to plate subduction in the Early Ordovician, and that the prospecting direction for such a type of porphyry copper deposits should be in the magma island arc belt distributed in Duobaoshan-Yi'ershi area. |
| |
| Keywords: | geochemistry LA-ICP-MS zircon U-Pb dating Re-Os dating island arc Duobaoshan porphyry Cu-Mo deposit |
|
| 点击此处可从《矿床地质》浏览原始摘要信息 |
| 点击此处可从《矿床地质》下载免费的PDF全文 |
|
