| 南祁连阳康地区花岗岩锆石年龄及地质意义 |
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| 引用本文： | 潘建,常立海,李贵义. 南祁连阳康地区花岗岩锆石年龄及地质意义[J]. 吉林地质, 2019, 38(2): 6-8 |
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| 作者姓名： | 潘建 常立海 李贵义 |
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| 作者单位： | 吉林省区域地质矿产调查所,吉林 长春,130022;黑龙江省生态地质调查研究总院,黑龙江 哈尔滨,150030 |
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| 摘 要： | 沿着南祁连北缘出露有一系列古生代的侵入岩,其形成时代一直存在争议,本文对出露在阳康地区的花岗岩进行了LA-ICP-MS锆石U-Pb年代学研究,确定了该地区花岗岩的时代归属;这些岩体主要分布在哈拉湖,阳康等地区,岩性主要为石英闪长岩、花岗闪长岩、二长花岗岩等,研究的结果表明其地质时代属晚奥陶世,对南祁连的大地构造演化具有重要的地质意义。
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| 关 键 词： | 南祁连 奥陶纪 花岗岩 锆石U-PB年龄 |
Zircon age and geological significance of the granite in Yangkang area,South Qilian |
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| PAN Jian,CHANG Li-hai,LI Gui-yi. Zircon age and geological significance of the granite in Yangkang area,South Qilian[J]. Jilin Geology, 2019, 38(2): 6-8 |
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| Authors: | PAN Jian CHANG Li-hai LI Gui-yi |
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| Affiliation: | (Regional Geological and Mineral Resources Survey of Jilin Province,Changchun 130022,Jilin,China;General Institute of Ecological Geological Survey and Research of Heilongjiang Province,Harbin 150030,Heilongjiang,China) |
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| Abstract: | There are a series of Paleozoic intrusive rocks along the northern margin of the South Qilian Mountains, whose formation age has been controversial. In this paper, LA-ICP-MS zircon U-Pb chronology of granites exposed in Yangkang area is studied, and the age attribution of granites in this area is ascertained. These rocks are mainly distributed in Hara Lake, Yangkang and other areas. The lithology of these rocks is mainly quartz diorite, granodiorite and monzonitic granite and so on. The results show that the geological age of these rocks belongs to Late Ordovician, which has important geological significance for the tectonic evolution of South Qilian. |
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| Keywords: | South Qilian Ordovician granite zircon U-Pb age |
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