| 论保山地区晚古生代大地构造位置 |
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| 引用本文：王训练,加藤诚,王鸿祯.1994.论保山地区晚古生代大地构造位置[J].地球学报,15(3,4):130-144. |
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| 中文摘要:本文根据保山地区与扬子地区及藏南地区沉积相、生物群特征及古地磁资料的对比，讨论保山地区晚古生代大地构造位置。沉积相变化特征表明保山地区在晚古生代经历了与藏南地区十分相似的地质历史，而与扬子地区完全不同。保山地区晚古生代四射珊瑚、腕足类和脊椎动物等底栖生物与扬子地区有明显差别，二者之间似乎存在显著的隔离；而与藏南地区有一定的相似性，特别是泥盆纪与晚石炭世的动物群与藏南及其邻区十分相近，表明二者之间没有明显的隔离。古地磁资料显示晚古生代扬子地区位于赤道附近，而保山地区与藏南地区则位于中纬度地区。根据古生物学、沉积学及古地磁资料对比推测保山地区与藏南地区在晚古生代位于同一大陆边缘，二者远离扬子地区。保山地区作为一个中间地块位于包括藏南地区在内的冈瓦纳构造域，而扬子地区则处于另一构造域──南亚构造域，二者为宽阔的大洋──古特提斯洋隔离。 |
| 中文关键词:古特提斯，保山地块，滇西，大地构造，晚古生代 |
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| On the Tectonic Position of the Baoshan Region during Late Palaeozoic Period |
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| Abstract:The aim of this study is to discuss the tectonic position of Baoshan in Yunnan Province, China during the Late Paleozoic by comparison of the sedimentary facies and fauna as well aspalaeomagnetic data from the Baoshan region with those from the Yangtze region and southernTibet.The sedimentary facies change suggests that in the Late Palaeozoic the Baoshan regionunderwent a similar geological history aS did southern Tibet,which is different from that ofthe Yangtze region. The rugose corals and brachiopods as well as vertebrates of Baoshan aredifferent from those of the Yangtze region during the Late Paleozoic. An evident organicsegregation seems to exist between them.The Late Paleozoic fauna of Baoshan showssimilarity to southern Tibet to a certain extent.Especially,Devonian and Late Carboniferousfaunas are very close to southern Tibet.This indicates that there was no evident organicsegregation between them in Late Palaeozoic. The palaeomagnetic data reveal that in LatePalaeozoic the Yangtze region was close to the equator,while the Baoshan region and southernTibet were situated in the middle latitudes. On the basis of the palaeontological,sedimentological and palaeomagnetic data,it isinferred that Baoshan and southern Tibet were situated in one and the same continentalmargin,and the both regions were far from the Yangtze region during the Late Paleozoic. TheBaoshan region may be considered as a massif within the Gondwana tectonic domain,includingsouthern Tibet,while the Yangtze region was loceted in another tectonic domain─the SouthAsian domain,with a wide ocean,the Tethvs between them. |
| keywords:Palaeo-Tethys Baoshan massif western Yunnan tectonics Late, |
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