新疆北天山晚古生代洋盆演化与推覆构造

EVOLUTION OF THE OCEANIC BASIN OF LATE PALEOZOIC AND NAPPE STRUCTURE OF NORTH TIANSHAN , XINJIANG

通过实地考察并综合区域及深部物探资料,研究了北天山逆冲推覆系统的构造样式、结构特征和组合方式;认为北天山晚古代洋盆为板内地壳扩张活动形成的裂陷构造产物,存在时限短暂、对生物群迁移基本没有阻隔作用,不应具有分隔岩石圈板块的大地构造意义。

Based on the field investigation ,and data of regional geology and deep-earth geophysical exploration , the author studied the tectonic model,structural features and association pattern of reverse nappe system, discussed the evolution of the oceanic basin of late Paleozoic in the North Tianshan and put forward the suggestions that the oceanic basin was formed by the spreading of the intraplate crust,and lasted for a short time,thus creating no influence on the migration of biota,and having no geotectonic significance in the seperation of lithospheric blocks.