| 滇西藏东三江地区主要地块碰撞拼合的古地磁分析 |
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| 引用本文： | 李朋武,高锐,崔军文,管烨.滇西藏东三江地区主要地块碰撞拼合的古地磁分析[J].沉积与特提斯地质,2003,23(2):28-34. |
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| 作者姓名： | 李朋武 高锐 崔军文 管烨 |
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| 作者单位： | 中国地质科学院地质研究所,岩石圈中心,北京,100037 |
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| 基金项目： | 中国岩石圈三维结构数据库项目 (2 0 0 0 1 0 1 0 1 )，国家重点基础研究发展规划项目 (G1 9980 40 80 0 ) |
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| 摘 要： | 利用古地磁数据，结合与构造活动有关的沉积记录以及古生物地理信息，对华南、思茅、保山、缅泰、印支、拉萨和喜马拉雅地块进行了古纬度和纬度运移量的对比研究，以确定云南西部三江地区主要地块的碰撞拼合历史。结果表明：(1)思茅地块可能源于华南地块；(2)保山和缅泰地块在晚石炭世至晚二叠世发生快速北移；(3)保山与华南地块于晚二叠世碰撞之后，和缅泰地块、华南地块以及印支地块继续向北漂移，直到晚三叠世；(4)保山与华南地块间的古特提斯洋可能于早志留世张开，晚二叠世闭合。
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| 关 键 词： | 三江地区 古地磁 滇西藏东 |
| 文章编号： | 1009-3850(2003)02-0028-07 |
| 收稿时间： | 2003/3/12 0:00:00 |
| 修稿时间： | 2003年3月12日 |
The palaeomagnetic study of the collision and collage of major land-masses in the Nujiang-Lancangjiang-Jinshajiang area in western Yunnan and eastern Xizang |
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| LI Peng-wu,GAO Rui,CUI Jun-wen,GUAN Ye.The palaeomagnetic study of the collision and collage of major land-masses in the Nujiang-Lancangjiang-Jinshajiang area in western Yunnan and eastern Xizang[J].Sedimentary Geology and Tethyan Geology,2003,23(2):28-34. |
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| Authors: | LI Peng-wu GAO Rui CUI Jun-wen GUAN Ye |
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| Institution: | Institute of Geology, Chinese Geological Sciences, Beijing 100037, China |
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| Abstract: | In order to explore the evolution and history of the collision and collage of the major landmasses in the Nujiang-Lancangjiang-Jinshajiang area in western Yunnan and eastern Xizang, the comparative study has been made for the migration of the present-day latitudes and palaeolatitudes of South China, Simao, Baoshan, Burma-Thailand, Indo-China, Lhasa and Himalaya landmasses in the light of the palaeomagnetic data in integration with the existing sedimentary records and palaeogeographic information. The results show that:(1) the Simao landmass may be derived from the South China landmass; (2) the Baoshan and Burma-Thailand landmasses once drifted rapidly northwards during the Late Carboniferous and Late Permian; (3) after the collision with the South China landmass during the Late Permian, the Baoshan landmass continued to drift northwards together with the Burma-Thailand, South China and Indo-China landmasses till the Late Triassic, and (4) the Palaeo-Tethyan Ocean between the Baoshan and South China landmasses might be opened during the Early Silurian and closed during the Late Permian. |
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| Keywords: | Nujiang-Lancangjiang-Jinshajiang area Palaeomagnetism western Yunnan and eastern Xizang |
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