| 内蒙大青山地区黑云母花岗岩SHRIMP U-Pb定年及其构造意义 |
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| 引用本文： | 张臣,韩宝福,刘树文,季建清,赵磊,张磊.内蒙大青山地区黑云母花岗岩SHRIMP U-Pb定年及其构造意义[J].岩石学报,2009,25(3):561-567. |
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| 作者姓名： | 张臣 韩宝福 刘树文 季建清 赵磊 张磊 |
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| 作者单位： | 北京大学地球与空间科学学院,造山带与地壳演化教育部重点实验室,北京,100871 |
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| 基金项目： | 国家自然科学基金项目（40772142，40872120） |
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| 摘 要： | 大青山黑云母花岗岩主要由钾长石（45%）、斜长石（15%~25%）、石英（25%）、黑云母（5%~10%）组成。主元素SiO2含量69.48%~72.40%，K2O+ Na2O含量7.74%~9.58%，K2O＞Na2O，A/CNK为1.0~1.17，具过铝质-强过铝质花岗岩特征；稀土元素分馏较强，REE配分型式具中等负Eu异常；微量元素在原始地幔（PM）标准化蛛网图上显示Rb、Th、K、Nd相对富集，Nb、Sr、Ti相对亏损，岩石地球化学特征与碰撞花岗岩类似。本文对大青山地区料木山黑云母花岗岩进行高精度锆石SHRIMP U-Pb定年研究，其形成时间为2430±19Ma，可能代表鄂尔多斯陆块与阴山微陆块碰撞造山岩浆热事件年龄。区域上埃达克质岩、赞歧岩、Colcepet花岗岩同位素年龄均为2470~2330Ma, 预示着这一地区在古元古代早期可能已经出现与板块消减相关的陆-陆碰撞造山带。古元古代花岗岩的岩石地球化学和同位素年代学特征表明乌拉山-大青山麻粒岩相带是一条古元古代造山带。
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| 关 键 词： | 古元古代花岗岩 SHRIMP锆石年龄 内蒙古 |
| 收稿时间： | 2008/4/16 0:00:00 |
| 修稿时间： | 2009/2/10 0:00:00 |
SHRIMP U-Pb dating of biotite granites in Daqingshan, Inner Mongolia, and its significance |
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| ZHANG Chen,HAN BaoFu,LIU ShuWen,JI JianQing,ZHAO Lei and ZHANG Lei.SHRIMP U-Pb dating of biotite granites in Daqingshan, Inner Mongolia, and its significance[J].Acta Petrologica Sinica,2009,25(3):561-567. |
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| Authors: | ZHANG Chen HAN BaoFu LIU ShuWen JI JianQing ZHAO Lei and ZHANG Lei |
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| Institution: | The Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;The Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;The Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;The Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;The Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China;The Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing 100871, China |
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| Abstract: | |
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| Keywords: | Paleoproterozoic granitiods SHRIMP zircon age Inner Mongolia |
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