中文摘要：

研究区位于柴达木盆地阿尔金斜坡带的中段,跨越柴达木盆地、阿尔金断裂和索尔库里盆地三个构造单元,阿尔金斜坡带总体上表现为大致向南倾斜的斜坡,是一个在三位空间上变化的曲面,其包络面的走向与阿尔金断裂的走向基本一致。阿尔金斜坡带由与阿尔金断裂伴生的轴向近东西、靠近断裂逐渐向其收敛的背斜构成,在阿尔金山前表现为一系列斜列鼻状构造,在空间上呈宽缓的、隆拗相间的有规律性变化,在大部分地段表现为由堆垛式双重构造自北向南的逆冲作用形成的大型背斜的前翼。根据背斜前翼生长地层确定阿尔金断裂自下干柴沟组上段沉积时期（38Ma）开始形成,至今一直处于持续的活动状态。在下干柴沟组上段至上油砂山组沉积时期（38～8.1Ma）,断裂的活动强度较小,自狮子沟组沉积开始（8.1Ma）,断裂的活动强度明显增大。

英文摘要：

The study area,located in the middle part of Altyn slope zone in the Qaidam Basin,spans three structural units including Qaidam Basin,Altyn fault and Suoerkuli Basin. The Altyn slope zone generally characterized with an approximately south-dip ramp is a curved surface varying in three-dimension,and the trend of its envelope surface is almost consistent with that of the Altyn fault. The Altyn slope zone consists of near-E-W-trending anticlines associated with the Altyn fault,which gradually converge towards the fault. In the foreland of the Altyn Mts,the slope zone is characterized with a series of oblique nose structures,presenting a regular change of wide and gentle alternate uplift and depression. In most parts,it presents as the forelimb of the large-scale anticline resulted from the thrusting of stacking-type duplex structure to south from north. Based on the growth strata of the forelimb,the formation of Altyn fault began at the deposition of the upper member of the Xiaganchaigou Formation （38Ma）,the fault has been active until now. The active intensity of the fault was weak during the deposition period from the upper member of the Xiaganchaigou Formation to the upper Shangyoushashan Formation （38-8.1Ma）,and became strong since the deposition of Shizigou Formation （8.1Ma）.