| 内蒙古大青山地区英安岩LA-ICP-MS锆石U-Pb年龄及其构造意义 |
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| 引用本文： | 郭俊,马富财,杨文,成林强,李鹏,郭雪峰.内蒙古大青山地区英安岩LA-ICP-MS锆石U-Pb年龄及其构造意义[J].地质通报,2016,35(9):1517-1521. |
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| 作者姓名： | 郭俊 马富财 杨文 成林强 李鹏 郭雪峰 |
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| 作者单位： | 1. 陕西区域地质矿产研究院, 陕西 咸阳 712000;2. 中国地质大学(北京)地球科学与资源学院, 北京 100083 |
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| 基金项目： | 内蒙古自治区地质勘查基金管理中心项目（编号：NMKD2013-23） |
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| 摘 要： | 在内蒙古大青山地区逆冲推覆构造所截切的英安岩中获得锆石~(207)Pb/~(206)Pb表面年龄加权平均值为1870±19Ma,认为英安岩为华北克拉通古元古代末—新元古代一次裂解事件的产物.同时,据安山岩锆石U-Pb年龄谐和度(102)较好的锆石~(206)Pb/~(238)U表面年龄436±4Ma及英安岩锆石U-Pb年龄谐和度(104)较好的锆石~(206)Pb/~(238)U表面年龄153±2Ma和160±2Ma,表明大青山地区逆冲推覆构造存在构造复活或构造追踪现象。这一认识为大青山地区逆冲推覆构造的研究积累了新的资料,提供了新的研究思路。
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| 关 键 词： | LA-ICP-MS锆石U-Pb年龄 逆冲推覆构造 构造复活 构造追踪 大青山地区 |
| 收稿时间： | 4/9/2016 12:00:00 AM |
| 修稿时间： | 2016/7/11 0:00:00 |
LA-ICP-MS zircon U-Pb ages of quartz-andesite in Daqingshan area, Inner Mongolia and its tectonic significance |
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| GUO Jun,MA Fucai,YANG Wen,CHENG Linqiang,LI Peng and GUO Xuefeng.LA-ICP-MS zircon U-Pb ages of quartz-andesite in Daqingshan area, Inner Mongolia and its tectonic significance[J].Geologcal Bulletin OF China,2016,35(9):1517-1521. |
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| Authors: | GUO Jun MA Fucai YANG Wen CHENG Linqiang LI Peng and GUO Xuefeng |
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| Institution: | 1. Academy of Regional Geological Survey and Mineral Resources Exploration of Shaanxi, Xianyang 712000, Shaanxi, China;2. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China |
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| Abstract: | Weighted average zircon 207Pb/206Pb age of 1870±19Ma was obtained from the quartz-andesite cut by the thrusting structure in Daqingshan area, Inner Mongolia. The quartz-andesite is the product of a breakup event between multi-stage rifting in the late Paleoproterozoic to Neoproterozoic period in North China. At the same time, according to the 206Pb/238U age of 436±4Ma from the concordant zircon (No. 06) of the basalt-andesite and the 206Pb/238U ages of 153±2Ma and 160±2Ma from the concordant zircons (No. 15 and 29) of the quartz-andesite, the structural revival and structural tracing phenomena exist in the thrusting tectonics in Daqingshan area. The results obtained by the authors have accumulated new information and provided new theoretical thinking for the study of thrusting tectonics in Daqingshan area. |
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| Keywords: | LA-ICP-MS zircon U-Pb age thrusting tectonics revived structures structural tracing Daqingshan area |
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