| 新疆东准噶尔阿尔曼泰蛇绿构造混杂岩带中辉长岩LA-ICP-MS锆石U-Pb年龄及其地质意义 |
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| 引用本文： | 冯晓强,崔玉宝,程龙,刘玉梅,鱼静. 新疆东准噶尔阿尔曼泰蛇绿构造混杂岩带中辉长岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J]. 地质通报, 2016, 35(9): 1411-1419 |
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| 作者姓名： | 冯晓强 崔玉宝 程龙 刘玉梅 鱼静 |
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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： | 中国地质调查局项目（编号：1212011120500、1212011120510、1212011220618） |
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| 摘 要： | 阿尔曼泰蛇绿构造混杂岩带位于新疆东准噶尔,记录了古亚洲洋演化。对蛇绿构造混杂岩带中的辉长岩进行主量、微量、稀土元素及LA-ICP-MS锆石U-Pb测年分析,发现辉长岩的原始岩浆来源于亏损地幔与大陆地壳之间,同时受到后期地壳物质的混染作用或来自消减残片的流体交代。锆石年龄为514.3±3.7Ma,推测阿尔曼泰蛇绿构造混杂岩带形成时代为中寒武世—早奥陶世。
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| 关 键 词： | 阿尔曼泰蛇绿岩 辉长岩 LA-ICP-MS锆石U-Pb年龄 东准噶尔 新疆 |
| 收稿时间： | 2016-04-07 |
| 修稿时间： | 2016-06-27 |
LA-ICP-MS zircon U-Pb age of gabbro from Aermantai ophiolite in east Junggar, Xinjiang, and its geological significance |
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| FENG Xiaoqiang,CUI Yubao,CHENG Long,LIU Yumei and YU Jing. LA-ICP-MS zircon U-Pb age of gabbro from Aermantai ophiolite in east Junggar, Xinjiang, and its geological significance[J]. Geologcal Bulletin of China, 2016, 35(9): 1411-1419 |
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| Authors: | FENG Xiaoqiang CUI Yubao CHENG Long LIU Yumei YU Jing |
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| Affiliation: | 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: | Aermantai ophiolite lies in the east of Junggar and has recorded tectonic evolution of the paleo-Asian Ocean. Through the analysis of major elements, trace elements, rare earth elements and LA-ICP-MS zircon U-Pb ages of gabbro, the authors found that the original magma of gabbro was derived between depleted mantle and continental crust, affected by crust assimilation and hybridization. The age of zircon is 514.3±3.7Ma, suggesting that the formation of the ophiolite took place in Middle-Cambrian-Early Ordovician period. |
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| Keywords: | Aermantai ophiolite gabbro LA-ICP-MS zircon U-Pb age east Junggar Xinjiang |
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