阿尔金断裂带的几何学研究

GEOMETRY OF THE ALTUN FRACTURE ZONE

阿尔金断裂带是我国西部一条巨型左旋走滑断裂带,全长1600km,宽100km,呈北东向分布。它主要由阿尔金主断裂及且末、三危山、拉竹龙—苦牙克、江尕萨依、红柳沟—拉配泉等断裂组成。从它的活动历史和几何学特征分析,在大陆碰撞以后的前期属于挤压—走滑运动,而现今则以走滑运动为主。它和西昆仑及北祁连断裂带共同构成青藏高原的北部边界,它在其中起着连接和转换的作用。

The Altun fracture zone is a gigantic sinistral strike-slip fracture zone in western China, It, 1600 km long and 100 km wide, extends in a NE direction. The fracture zone is composed mainly of the main Altun fracture and the Qiemo, Sanweishan, Lazhuglung-Kuyak, Janggalsay and Hongliugou-Lapeiquan fractures. From an analysis of its history of activity and geometric features, its activity belonged to the compressional-strike slip movement in the early stage of continental collision, while at present the strike-slip movement is dominant. This fracture zone and the Kunlun and North Qilian fracture zones combine to form the northern boundary of the Qinghai-Tibet plateau. It plays a role of connection and transform in the boundary.