| 青藏高原地体的初步划分及构造特征简述 |
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| 引用本文：唐哲明,韩同林.1990.青藏高原地体的初步划分及构造特征简述[J].地球学报,11(2):121-128. |
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| 中文摘要:本文在分析了青藏高原不同地体的区域构造的基础上，讨论了青藏高原的构造演化史。青藏高原的板块构造经历了两个开合旋回。第一个开合旋回发育的时间为泥盆纪到二叠纪，其中泥盆纪到石炭纪为洋盆扩张阶段，二叠纪为洋盆俯冲缩小阶段。第二个开合旋回发育的时间为三叠纪到白垩纪，其中早中三叠世和晚三叠世早期为洋盆扩张阶段，晚三叠世晚期到白垩纪对于整个青藏高原来说，为洋盆俯冲缩小阶段。洋盆扩张阶段，地体朝南运动，洋盆俯冲缩小阶段，地体朝北运动。 |
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| STRUCTURAL ＦEATURES AND TENTATIVE DIVISION OF THE TERRANES IN QINGHANG-XIZANG PLATEAU |
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| Abstract:The Qinghai-Xizang plateau may be divided into five terranes, i.e. Hinalaya terrane, Gangdise terrane, Qiangtang terrane, Bayankala Terrane and Kunlun terrine, each of these terranes has its own characteristic structural features and has been seperated from one another by ocean basins. The time at which the ocean basins closed and folded to form confinent is younger from north to south. The oldest ocean basin was formed in Devonian. All the basins closed by the end of late Cretatieus. They experienced two cycles of opening and closure during their evolution history.The first cycle was from Devonian to Permian and the second was from Triassic to the end of late Cretaceous. Before closure, the southern and northern terranes were mostly in a neritic facies environment. After closure the northern terrane uplifted, and formed new continent, whereas the southern terrine mostly remained in a neritic facies environment. The northern boundary of the Gondwana land is the Jinshajiang river fracture zone and the Gondwana land broke into a serial terranes from Triassic period. |
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