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| 大兴安岭东北部哈拉巴奇花岗岩体锆石U-Pb年龄及其成因 | |
| 引用本文： | 隋振民,葛文春,吴福元,徐学纯,王清海.大兴安岭东北部哈拉巴奇花岗岩体锆石U-Pb年龄及其成因[J].世界地质,2006,25(3):229-236. |
| 作者姓名： | 隋振民 葛文春 吴福元 徐学纯 王清海 |
| 作者单位： | 1. 吉林大学,地球科学学院,吉林,长春,130061 2. 中国科学院,地质与地球物理研究所,北京,100029 3. 吉林大学,东北亚国际地学研究与教学中心,吉林,长春,130026 |
| 基金项目： | 致谢：感谢中国科学院地质与地球物理研究所毛骞在锆石CL图像采集、西北大学地质学系柳小明在锆石U-Pb测试及中国科学院广州地球化学研究所刘颖和涂湘林在主、微量元素分析过程中的帮助. |
| 摘 要： | 哈拉巴奇岩体主要由二长花岗岩钾长花岗岩和花岗闪长岩组成。样品的LAICPMS锆石UPb年龄测定和主量及微量元素的分析结果表明,哈拉巴奇岩体为两次侵位的早古生代花岗岩体,其中二长花岗岩钾长花岗岩的侵位时间较早(500Ma),花岗闪长岩的侵位时间相对较晚(461Ma);岩体具有后造山花岗岩类的岩石组合特征和地球化学特征,为额尔古纳地块与兴安地块碰撞拼贴作用结束后的后造山阶段的产物;二长花岗岩钾长花岗岩和花岗闪长岩起源于相同的岩浆源区,其源区物质可能是中元古代期间地幔中新增生的地壳物质,二者地球化学特征的差别是源岩部份熔融程度不同所致。 |
| 关 键 词： | 锆石U-Pb年龄 早古生代 花岗岩成因 大兴安岭 |
| 文章编号： | 1004-5589（2006）03-0229-08 |
| 收稿时间： | 2006-05-26 |
| 修稿时间： | 2006-05-262006-06-30 |
U-Pb chronology in zircon from Harabaqi granitic pluton in northeastern Daxing'anling area and its origin |
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| SUI Zhen-min,GE Wen-chun,WU Fu-yuan,XU Xue-chun,WANG Qing-hai.U-Pb chronology in zircon from Harabaqi granitic pluton in northeastern Daxing''''anling area and its origin[J].World Geology,2006,25(3):229-236. | |
| Authors: | SUI Zhen-min GE Wen-chun WU Fu-yuan XU Xue-chun WANG Qing-hai |
| Institution: | 1. College of Earth Sciences, Jilin University, Changchun 130061, Jilin,China; 2.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 3.International Center for Geosciences Research and Education in Northeast Asia, Jilin University, Changchun 130026, Jilin, China. |
| Abstract: | Harabaqi granitic pluton is mainly composed of adamellite-moyite and granodiorite. The authors used LAKG-5CD2ICPKG-5CD2MS as zircon UKG-5CD2Pb dating and analyzed the major and trace element compositions in the granitic pluton. The results show that the pluton formed in Early Paleozoic, with intrusions for two times. The intrusion of adamellite-moyite (aged in 500 Ma) is earlier than of the granodiorite (461 Ma). The pluton is marked by rock assemblage and geochemistry of postorogenic granite, and is the postorogenic pluton after collision between Erguna plot and Xing'an plot. The adamellite-moyite and granodiorite came from the same magma source, and the provenance may be the crustal substance from new accretion of mantle. The difference in geochemistry between the two kinds of rocks resulted from their distinct degree of partial melting of the provenance. |
| Keywords: | ziron U-Pb dating Early Paleozoic granite origin Daxing'anling |
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