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冈瓦纳与欧亚大陆间的昌都地块构造属性存在争议,解决问题的关键是生物古地理区系判别.青海南部二叠纪类化石群的研究表明昌都地块该生物群一直表现为暖水的特提斯型,与华南地区始终表现出更多的相似性,其生物古地理归属应为特提斯大区华夏-特提斯区华南亚区.昌都地块南界龙木错-双湖-澜沧江缝合带在早二叠世为划分青藏高原暖水型特提斯区的南界,不仅是华南亚区与藏北冷暖混合亚区的分界线,也是特提斯大区与冈瓦纳大区的分界线.中二叠世以后该带不再构成大区界线,但在确定次一级分区界线上仍是一个很好的划分标志;北界金沙江缝合带二叠纪两侧生物群表现出一致性,未形成浅海底栖生物自由迁移的障碍,不具有生物古地理分区意义.
The structural properties of the Qamdo block between Gondwana and Eurasia are controversial, and the crux of the solution lies in the discrimination of the Paleo-Palaeogeography.Studies on the Permian fossils in the southern Qamdo show that the biota in the Qamdo block has been characterized as warm Tethys type of water, and southern China has always demonstrated more similarities, its biological paleogeographic attribution should be Tethys Huaxia - Tethys South China region. South of the Qamdo block Longmu fault - The Shuanghu and Lancang suture zone was formed in the Early Permian to divide the southern boundary of the warm and water-like Tethyan area of the Qinghai-Tibet Plateau. It is not only the dividing line between the South China sub-region and the mixed sub-region of the Northern Tibet, but also the Tethys region Wana area dividing line.The Middle Permian after the belt no longer constitutes a regional boundary, but in determining the sub-district boundaries is still a good marker; the northern boundary of the Jinshajiang suture Permian two The lateral biota showed consistency, did not form a barrier to the free migration of shallow benthic organisms, and did not have the significance of biological paleogeography.