【摘要】 利用人工和天然地震剖面解释,地面地质资料分析,研究了位于塔里木盆地西北缘的南天山与西昆仑帕米尔冲断带的空间对接关系.结果表明:在浅层阿图什与克拉托—明尧乐背斜带之间是来自于南天山与西昆仑帕米尔冲断带的构造结合带,南天山冲断带可分为浅层叠瓦式冲断系统和深层的隐伏双重冲断系统,西昆仑帕米尔冲断带以乌泊尔基底断裂为界分成北部的克拉托—明尧乐背斜带和南侧的乌泊尔背驮盆地;在深层塔里木地块受到新生代以来印度板块与欧亚板块的碰撞和乌泊尔右行走滑断裂的控制作用,产生南北两侧的双向大陆深俯冲作用,致使南天山与西昆仑仰冲于塔里木地块而抬升,形成南北两大新生代复活造山带.更多还原

【Abstract】 Based on interpreting the artificial and natural seismic profiles,and analyzing the geologic survey data of the Northwestern margin of the Tarim basin,the spatial relationship of the Southern Tien Shan and Pamir of Western Kunlun thrust belts was studied.The results indicate that the structural junction of the two thrust belts at the shallow part was between the Atushi and Kelatuo-Mingyaole anticlinal belts.The Southern Tien Shan thrust belt can be divided into two parts vertically,an imbricate thrust system seated at the shallow and a complex duplex buried at the deep.The Pamir of the Western Kunlun thrust belt can be divided into two parts horizontally,the Kelatuo-Mingyaole anticlinal belt at the North and the Wuboer piggyback basin at the South which are separated by the Wuboer basement fault.At the deeper part,influenced by the collision of the Indian plate and Eurasia plate together,with the dextral strike-slip movement of the Wuboer fault since Cenozoic,the Tarim block subducted under the continental crust both at its north and south margins.This subduction caused the reactivation and uplift of the Southern Tienshan and Western Kunlun.更多还原