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新疆阿尔泰克因布拉克铜锌矿区闪长岩锆石U-Pb年龄及地质意义

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尚海军, 陈维民, 张耀选, 张志欣. 新疆阿尔泰克因布拉克铜锌矿区闪长岩锆石U-Pb年龄及地质意义[J]. 西北地质, 2017, 50(4): 59-69.
引用本文: 尚海军, 陈维民, 张耀选, 张志欣. 新疆阿尔泰克因布拉克铜锌矿区闪长岩锆石U-Pb年龄及地质意义[J]. 西北地质, 2017, 50(4): 59-69.
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SHANG Haijun, CHEN Weimin, ZHANG Yaoxuan, ZHANG Zhixin. Zircon U-Pb Dating of Diorite from the Keyinbulake Cu-Zn Deposit in Altay, Xinjiang and Its Geological Implications[J]. Northwestern Geology, 2017, 50(4): 59-69.
Citation: SHANG Haijun, CHEN Weimin, ZHANG Yaoxuan, ZHANG Zhixin. Zircon U-Pb Dating of Diorite from the Keyinbulake Cu-Zn Deposit in Altay, Xinjiang and Its Geological Implications[J]. Northwestern Geology, 2017, 50(4): 59-69.
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新疆阿尔泰克因布拉克铜锌矿区闪长岩锆石U-Pb年龄及地质意义

  • 1.

    新疆维吾尔自治区地质勘查基金项目管理中心, 新疆 乌鲁木齐 830002

  • 2.

    中国科学院新疆生态与地理研究所, 新疆矿产资源研究中心, 新疆 乌鲁木齐 830011;新疆矿产资源与数字地质重点实验室, 新疆 乌鲁木齐 830011

  • 基金项目: 国家科技支撑计划项目“阿尔泰重要成矿带成矿过程与靶区优选评价”（2011BAB06B03-02），国家自然科学基金“甘肃北山公婆泉斑岩铜矿床流体演化与成矿作用”（41272103）联合资助成果

Zircon U-Pb Dating of Diorite from the Keyinbulake Cu-Zn Deposit in Altay, Xinjiang and Its Geological Implications

  • 1.

    Geological Prospecting Fund Project Management Center of Xinjiang Uygur Autonomous Region, Urumqi 830002, Xinjiang, China

  • 2.

    Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography of Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China;Xinjiang Laboratory of Mineral Resources and Digital Geology, Urumqi 830011, Xinjiang, China

    摘要
  • 克因布拉克铜锌矿床位于阿尔泰南缘冲乎尔火山-沉积盆地，矿区出露大面积花岗质岩体，矿体赋存于花岗质岩体与上志留统-下泥盆统康布铁堡外接触带中。在井下开采过程中均见有闪长岩脉穿插铜锌矿体和花岗岩体的地质现象。闪长岩锆石LA-MC-ICP-MS U-Pb加权平均年龄为（262.0±2.1）Ma（MSDW=4.6），为新疆阿尔泰中-晚二叠世（270~250 Ma）岩浆活动产物。结合矿床地质特征和矿区二长花岗岩的形成时代，限定矿床形成时代为278~262 Ma，为早-中二叠世成矿。
    The Keyinbulake copper-zinc deposit is located at Chonghuer volcanic-sedimentary basin in Southern Altay. Granite pluton was exposed widely in this deposit,where the ore body occurred in the exocontact zones between granite and Upper Silurian-Lower Devonian Kangbutiebao Formation. In the underground mining process, there are geological phenomena of the diorite vein interspersed with copper and zinc ore bodies and granite. Zircon LA-MC-ICP-MS U-Pb dating of diorite has yielded a weighted average age of 262.0±2.1 Ma (MSDW=4.6), showing that the magmatic activitytook place in Middle-Late Permian. Combine with geological characteristic and the age of monzonitic granite, it's confined taht the Keyinbulake copper-zinc deposit was formed in the Early-Middle Permian, with an age of appreciably 278~262 Ma.
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收稿日期:  2016-04-01
修回日期:  2017-07-10
刊出日期:  2017-12-15

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