| 新疆古生物地理与大地构造演化 |
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| 引用本文：曹仁关.1989.新疆古生物地理与大地构造演化[J].地球学报,11(1):143-156. |
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| 中文摘要:根据古生物群的组成和特征,新疆可以分为阿尔泰区,准噶尔-天山区、塔里木区和昆仑山-喀喇昆仑山区。晚志留世末期,塔里木区与准噶尔-天山区拼结,形成蛇绿混杂岩和双变质带。早泥盆世末期,准噶尔-天山区俯冲于阿尔泰区之下,并形成双变质带和蛇绿岩套。早白垩世末期,昆仑山-喀刺昆仑山区俯冲于塔里木区之下,并形成蛇绿岩带。 |
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| PALAEOBIOGEOGRAPHY AND TECTONIC EVOLUTION OF XINJIANG |
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| Abstract:Palaeobiogeographicallically of Xinjiang may be divided into the Altay region, the Junggar-Tian Shan region, the Tarim region and the Kunlun Shan-Karakorum Shan region according to the distribution and characters of the fossils. The Altay region belongs to the Siberian plate, the Junggar-Tian Shan region is a part of the Kazakhstanian plate, the Tarim region is called the Tarim plate in tectonics, both the Kunlun Shan-Karakorum Shan region and the Qiangtang region located in the Northern Tibet may be named the Kunlun Shan-Karakorum Shan-Qiangtang plate as a geotectpnic unit. At the end of Late Silurian, the Tarim plate and the Kazakhstanian plate were welded into each other at the northern slope of. Harctau Mountain, while ophiolitic melange and paired metamorphic belts were formed. At the end of Early Devonian, the Kazakhstanian plate was subducted beneath the Siberian plate along the Ertix River, while ophiolitic suite and paired metamorphic belts were formed.The Kunlun Shan-Karakorum Shan-Qiangtang plate was a portion of the original Gondwanaland, located in the southern hemisphere, and drifted southward during the Late Palaeozoic. But it drifted northward in the Jurassic period, and subducted beneath the Tarim plate at the end of Early Cretaceous, accompained by the formation of ophiolitic belts. |
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