端部张性横向构造是大型走滑活动断裂终止的重要标志之一，前期预研究中，在青藏块体北部的金塔南山断裂东端与合黎山分界的黑河附近发现多条近NS向正断层。本申请拟通过高分辨率卫星影像解译、大比例尺地质地貌填图、探槽开挖、差分GPS和小型无人机测图、年代测试等手段，获得该区断裂几何图像、晚第四纪最新活动的地质地貌特征、滑动速率和古地震序列等定量参数。综合分析本区不同方向与不同性质活动断裂的构造转换关系、应变分配，探讨阿尔金断裂东延走滑活动终止的地质地貌表现、成因机制及其动力模式，加深对青藏块体与阿拉善块体之间相互作用、大型走滑断裂端部力学性质转换等热点科学问题的认识和理解。

Transform sturctures are indicative of where large strike-slip faults terminates. In previous studies, we found several normal faults striking nearly North-South direction around Hei He at dividing zone between Jinta Nan Shan and Heli Shan, north margin of Tibetan plateau. This application intends to study geometric pattern, geological and geomorphological expressions of late Quaternary activity, quantitative parameters such as slip rates and paleoearthquake sequence of faults in study area through traditional methods including high-resolution image interpretation, large scale geological and geomorphological mapping, trench study, differential GPS and small Unmanned Aerial Vehicles(sUAV) photogrammetry, optically stimulated luminescence(OSL) and cosmogenic nuclides dating. Then we analyze structural transformation and strain partitioning among faults with various striking direction and properties, and discuss geological and geomorphological characteristics, formation mechanism and dynamic source of eastern extension of strike-slip activity on Altyn Tagh fault, and finally enhance our knowledge on issue about interaction of Tibetan plateau and Alxa block, and issue about mechanical transformation where large strike-slip fault terminates.