| 内蒙古苏尼特左旗白音乌拉北部白音高老组时代重新厘定——来自LA-ICP-MS锆石U-Pb年龄的证据 |
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| 引用本文： | 肖中军,王振强,吴 煜,吕达鑫,田强国,王建统,徐建昌.内蒙古苏尼特左旗白音乌拉北部白音高老组时代重新厘定——来自LA-ICP-MS锆石U-Pb年龄的证据[J].地质通报,2015,34(9):1706-1714. |
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| 作者姓名： | 肖中军 王振强 吴 煜 吕达鑫 田强国 王建统 徐建昌 |
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| 作者单位： | 河南省地质矿产勘查开发局第一地质矿产调查院，河南 洛阳 471023 |
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| 基金项目： | 中国地质调查局项目（编号:1212011220452） |
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| 摘 要： | 内蒙古苏尼特左旗北部出露一套灰白色流纹质火山岩,前人根据岩性组合将其归入上侏罗统白音高老组。在这套火山岩中获得了4个LA-ICP-MS锆石U-Pb年龄,分别为305.1±1.1Ma、304.5±1.1Ma、305.7±1.9Ma、303.6±1.1Ma,将其划归为上石炭统宝力高庙组,这对研究区的地层划分及确定岩浆演化具有指导性意义。
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| 关 键 词： | 白音高老组 火山岩 宝力高庙组 LA-ICP-MS锆石U-Pb年龄 |
Redetermination of the age of Baiyingaolao Formation in Sonid Left Banner, Inner-Mongolia: Evidence from LA-ICP-MS U-Pb dating of zircons |
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| Institution: | No. 1 Institute of Geological & Mineral Resources Survey of Henan, Luoyang 471023, He'nan, China |
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| Abstract: | There exists a suite of gray rhyolitic rocks in Sonid Left Banner of Inner-Mongolia. According to the petrological features, these volcanic rocks are considered to be a part of Upper Cretaceous Baiyingaolao Formation. With the LA-ICP-MS dating analysis, however, the authors obtained four U-Pb ages, i.e., 305.1±1.1Ma, 304.5±1.1Ma, 305.7±1.9Ma, and 303.6±1.1Ma, indicating that they belong to the Upper Carboniferous Baoligaomiao Formation. The result achieved by the authors has guiding significance for stratigraphic division and determination of magma evolution. |
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| Keywords: | Baiyingaolao Formation rhyolitic rocks Baoligaomiao Formation LA-ICP-MS zircon U-Pb dating |
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