| 阿尔泰-蒙古微大陆的确定及其意义 |
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| 引用本文： | 李会军[,] 何国琦 吴泰然 吴波. 阿尔泰-蒙古微大陆的确定及其意义[J]. 岩石学报, 2006, 22(5): 1369-1379 |
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| 作者姓名： | 李会军[ ] 何国琦 吴泰然 吴波 |
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| 作者单位： | 1. 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;中国地质科学院地质力学研究所,北京,100081
2. 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： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 中国阿尔泰具有古元古代-中元古代-新元古代基底，其间可能经历了四次主要地质事件，对阿尔泰前寒武系的研究是确定阿尔泰-蒙古微大陆存在的基础；哈巴河群时代为震旦纪-中奥陶世，延伸约1500km，对哈巴河群时代及其规模的讨论是确定阿尔泰-蒙古微大陆存在最重要的依据；东锡勒克组为两大陆碰撞后松弛阶段的产物，白哈巴花岗岩形成于后碰撞环境，对东锡勒克组和白哈巴花岗岩的研究是确定阿尔泰-蒙古微大陆存在的重要依据。通过上述三方面的研究明确了阿尔泰-蒙古微大陆的存在，并厘定了它的南北边界，在此基础上通过对哈巴河群的岩石地球化学研究表明阿尔泰-蒙古微大陆是-个主要由元古宇物质组成的不成熟的微大陆。
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| 关 键 词： | 阿尔泰 微大陆 哈巴河群 基底 |
| 文章编号： | 1000-0569/2006/022(05)-1369-79 |
| 收稿时间： | 2005-12-20 |
| 修稿时间： | 2006-04-10 |
Confirmation of Altai-Mongolia microcontinent and its implications. |
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| LI HuiJun HE GuoQi,WU TaiRan and WU Bo. Confirmation of Altai-Mongolia microcontinent and its implications.[J]. Acta Petrologica Sinica, 2006, 22(5): 1369-1379 |
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| Authors: | LI HuiJun HE GuoQi WU TaiRan WU Bo |
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| Affiliation: | 1. The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China; 2. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100080, China |
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| Abstract: | Chinese Altai has proterozoic basement,and probably experienced four major events during Proterozoic era.Research about Precambrian basement is the base of dertermination of Altai-Momgolia microcontinent.The span of Habahe group extending about 1500 kilometers is from Sinian to Middle Ordovician and is belived to be continental margin sediment of Altai-Mongolia microtinent. Research about Habahe group is the key to determine Altai-Mongolia microtinent.Dongxileke group formed during the relaxing stage after two continent(Altai-Mongolia and Siberia)collided,Baihaba granite formed during post-collional tectonic environment.Research about Dongxileke group and Baihaba granite is important evidence of determining Altai-Momgolia microcontinent.The northern and southern edges of Ahai-Momgolia microcontinent are ascertained.Altai-Mongolia microcontinent is a immature continent mainly composed of proterozoic matter according to geochemical data of Habahe group. |
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| Keywords: | Altai Microcontinent Habahe group Basement |
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