| 安徽繁昌盆地牛山岩体锆石U-Pb定年及其意义 |
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| 引用本文： | 唐裕禄,闫峻,刘海泉,宋传中.安徽繁昌盆地牛山岩体锆石U-Pb定年及其意义[J].地质论评,2010,56(5). |
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| 作者姓名： | 唐裕禄 闫峻 刘海泉 宋传中 |
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| 作者单位： | 合肥工业大学资源与环境工程学院; |
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| 基金项目： | 教育部科学技术研究重点项目，教育部博士点基金 |
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| 摘 要： | 牛山岩体位于长江中下游地区繁昌火山盆地内,为一钻孔揭露的隐伏花岗斑岩岩体。近年来,勘探发现了与该岩体密切相关的铜、金、铅、锌多金属矿化。应用LA-ICP-MS锆石微区分析技术对该岩体进行了精确定年。岩体含有大量岩浆成因锆石,以高的Th/U比和振荡结晶环带为特征,17个测点的206Pb/238U年龄加权平均值为(121.8±1.9)Ma,属于长江中下游地区白垩纪岩浆晚期活动的产物。该岩体的精确定年和成矿发现,为本地区火山盆地内寻找铜、金矿开辟了新的前景。
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| 关 键 词： | 锆石定年 年代学格架 成矿 牛山岩体 繁昌火山盆地 安徽 |
Zircon U-Pb Dating of Niushan Intrusion in Fanchang Basin, Anhui Province, and Its Geological Implications |
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| TANG Yulu,YAN Jun,LIU Haiquan,SONG Chuanzhong.Zircon U-Pb Dating of Niushan Intrusion in Fanchang Basin, Anhui Province, and Its Geological Implications[J].Geological Review,2010,56(5). |
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| Authors: | TANG Yulu YAN Jun LIU Haiquan SONG Chuanzhong |
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| Institution: | TANG Yulu,YAN Jun,LIU Haiquan,SONG Chuanzhong School of Resources and Environmental Engineering,Hefei University of Technology,Hefei,230009 |
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| Abstract: | The Niushan intrusion in the Fanchang volcanic basin located in the Middle and Lower Yangtze region,is a concealed granite-porphyry rock exposed by a drill. In recent years,the copper,gold,lead,zinc polymetallic mineralization closely related to this intrusion was revealed in exploration. LA-ICP-MS zircon in-situ analysis technique was used to determine the accurate age of this intrusion. The intrusion have large amounts of magmatic zircons characterized with high Th/U ratios and crystal ring oscillators,th... |
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| Keywords: | zircon dating chronological frame metallogenesis Niushan intrusion Fanchang volcanic Basin Anhui |
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