阿尔金构造带形成机制探讨  

A STUDY ON FORMING OF ALTYN TECTONIC BELT

作　　者：李侠[1] 

机构地区：[1]长安大学地球科学与国土资源学院,陕西西安710054

出　　处：《西安工程学院学报》2003年第1期7-10,共4页Journal of Xi'an Engineering University

摘　　要：　阿尔金构造带的形成基本可分为两个阶段:早期,其在西北部塔里木地块和东南部柴达木—祁连地块的天平式摆动控制下,承受着挤压和拉张交替的波动力学作用,产生了一系列逆断层与正断层或反转断层;晚期,在青藏地块整体隆升而派生向北推挤的作用下,上述二地块各以不同速度向北滑移,因而在其间形成了剪切作用力,并使阿尔金构造带形成左行走滑断裂性质的断裂带,因此,阿尔金构造断裂带是一条被动构造带。The forming of Altyn tectonic belt is basically divided into two stages.In early periods controlled by repeated oscillation with rising here and subsiding there of the two massifs(Tarim massif at the northwest side and Caidam-Qilian massif at the southeast side),It under went wave mechanics process which sometimes extensionally strained,sometimes compressionally strained,and generated a series of reverse fault,normal fault and reversed fault.In late stage ,influenced by the northward jostling process that caused by the uplift of the Tibet block,the two massifs slid towards the north at different speed,so a shear stress came into being between the two massifs.At the same time,Altyn tectonic belt became a leftstrike slip fracture belt.Therefore,Altyn tectonic belt is a passive tectonic belt.

关 键 词：阿尔金构造带 天平式摆动 左行走滑 地幔波浪 

分 类 号：P54[天文地球—构造地质学]