索尔库里盆地的形成,演化及其与阿尔金断裂带的关系研究

索尔库里盆地的形成,演化及其与阿尔金断裂带的关系研究

郭召杰张志诚王建君

北京大学地质学系

收稿日期:1998-03-20 修回日期:1998-03-20 出版日期:1998-03-20 发布日期:1998-03-20

FORMATION AND EVOLUTION OF THE XORKOL BASIN AND ITS RELATION TO THE ALTUN TAGH FAULT

Gun Zhao-jie, Zhang Zhi-cheng, Wang Jian-jun

Department of Geology, Peking University，Beijing 100871

Received:1998-03-20 Revised:1998-03-20 Online:1998-03-20 Published:1998-03-20

摘要/Abstract

摘要： 阿尔金走滑断裂带主要由阿尔金主干断层与和条近于平行的左行走滑断层和斜交断层组成，其空间分布规律可用左行走滑简单剪切模型解释。索尔库里盆地是阿尔金断裂带中一个新生代断陷盆地，属于典型松弛分叉型走滑拉分盆地。索尔库里盆地扩张开始于上新世，至今扩张量约为４０ｋｍ，其扩张速率约为０．８ｃｍ／ａ。按相同的位移速率，本文估算了阿尔金主干断层自始新世晚期以来的走滑量，大约为３２０ｋｍ。

Abstract: The Altun Tagh fault, a famous huge sinistral strike-slip fault in NW China, is composed mainly of the Altun master shear and several secondary fracture. The relationship between master and secondary structures may he explained by a simple shear model. It is one of the typical strike-slip pull-apart basins which formed in the setting of releasing splay area in Altun Tagh. The Xorkol basin began to extend in Pliocene and its extensional width is now about 40km. The extending rate of the Xorkol basin is about 0.8cm/a. Based on the same rate, the displacement of the Altun master shear is estimated 320km from later Eocene.

郭召杰张志诚王建君. 索尔库里盆地的形成,演化及其与阿尔金断裂带的关系研究[J]. J4.

Gun Zhao-jie, Zhang Zhi-cheng, Wang Jian-jun. FORMATION AND EVOLUTION OF THE XORKOL BASIN AND ITS RELATION TO THE ALTUN TAGH FAULT[J]. J4.