| 青海门源地区红沟铜矿床含矿基性火山岩LA-ICP-MS锆石U-Pb年龄 |
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| 引用本文： | 王国强,李向民,徐学义,余吉远,孙吉明,武鹏.青海门源地区红沟铜矿床含矿基性火山岩LA-ICP-MS锆石U-Pb年龄[J].中国区域地质,2011(7):1060-1065. |
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| 作者姓名： | 王国强 李向民 徐学义 余吉远 孙吉明 武鹏 |
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| 作者单位： | [1]长安大学地球科学与资源学院,陕西西安710064 [2]中国地质调查局西安地质调查中心,陕西西安710054 |
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| 基金项目： | 中国地质调查局青藏专项《北祁连成矿带成矿条件研究与找矿靶区优选》（编号：1212010818090） |
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| 摘 要： | 对红沟铜矿床含矿火山岩进行高精度锆石LA-ICP-MS U-Pb同位素测年,获得单颗粒锆石的加权平均年龄为443.2Ma±1.2Ma。红沟铜矿床形成时代为晚奥陶世,形成环境为晚奥陶世陆缘裂谷环境。高精度年龄的获得对于整个祁连山地区产于陆缘裂谷环境的铜多金属矿床的成矿时代和成因研究具有重要意义。
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| 关 键 词： | 基性火山岩 锆石LA-ICP-MSU-Pb定年 红沟铜矿 青海门源地区 |
LA-ICP-MS U-Pb dating of zircons from basic volcanic rocks in the Honggou copper polymetallic deposit,Menyuan area,Qinghai |
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| WANG Guo-qiang,LI Xiang-min,XU Xue-yi,YU Ji-yuan,SUN Ji-ming,WU Peng.LA-ICP-MS U-Pb dating of zircons from basic volcanic rocks in the Honggou copper polymetallic deposit,Menyuan area,Qinghai[J].Regional Geology of China,2011(7):1060-1065. |
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| Authors: | WANG Guo-qiang LI Xiang-min XU Xue-yi YU Ji-yuan SUN Ji-ming WU Peng |
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| Institution: | 1.College of Earth Science and Land Recourses,Chang＇an University,Xi′an 710064,Shaanxi,China; 2.Xi′an Institute of Geology and Minerals Resources,China Geological Survey,Xi′an 710054,Shaanxi,China |
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| Abstract: | The Honggou copper polymetallic deposit is located in the southwest of Menyuan County,Qinghai Province.The authors conducted the chronological study of zircons from the basic volcanic rocks by means of LA-ICP-MS U-Pb.The weighted mean age of the zircons is 443.2±1.2 Ma,suggesting Late Ordovician.It is considered that the age represents the metallogenic epoch of the Honggou copper polymetallic deposit which was formed in a continental margin rift environment.The high-precision age obtained by the authors is of great significance in the study of ore-forming epoch and genesis of copper-polymetallic ore deposits produced in the epicontinental rift environment of the whole Qilian Mountain region. |
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| Keywords: | basic volcanic rocks zircon LA-ICP-MS U-Pb dating Honggou copper polymetallic deposit Menyuan area Qinghai |
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