中文摘要：

Datong 差错带是在北 Qinghai-Xizang (西藏) 高原的一个 NE trending 差错并且控制 Xining 盆和 Datong 盆的边界。它由 Maziying-Miaogou (F1 ) 差错和 Laoye Mountain-Nanmenxia 差错(F2 ) 组成。在沿着带的垂直方向有明显的排水量。领域调查结果证明这条带举办长期的活动。沿着在地下室岩石中的差错方面有几米长的压碎的地区和静脉。在差错节上，威尔斯系统在 red-brick-colored 上插入第四级的时期石子，并且有几厘米的差错凿厚在差错飞机上发展了。差错飞机上的差错凿日期(ESR ) 是 610 ? 桴 ? 慦汵慴敲 ? ‰慫琠?? 欠 ? 偂 ?? 欠 ? 潴㈠ ? 慫?? 愠摮ㄠ ? 慫?? 潴瀠敲敳瑮吗？？

英文摘要：

The Datong fault belt is a NE trending fault in the northern Qinghai-Xizang （Tibet） Plateau and controls the boundary of the Xining Basin and Datong Basin. It consists of the Maziying- Miaogou （F1） fault and the Laoye Mountain-Nanmenxia fault （F2）. There is obvious displacement in vertical direction along the belt. The field investigation results show that this belt has long-term activity. There are several meters long crushed zones and veins along the fault side in the basement rock. On the fault section, the Cambria system thrusts over the red- brick-colored Quaternary Period gravel, and there is a fault gouge of several centimeters thick developed on the fault plane. The fault gouge date （ESR） on the fault plane is 610 ± 61ka. The covering deluvial loess is not dislocated, and the OSL result is 14.6 ± 1.5ka. So it can be concluded that the fault belt was active in the middle Pleistocene, but inactive in the late Pleistocene according to the age data and geomorphologic features. Interior formations of the Datong basin features fold with the major axis orienting northwest. According to the relation of fault and fold deformation, Datong fault is a trausversal tear, which is due to uneven compression of the folds in different parts and NNE trending regional compressive stress. It is common among the NE trending faults in the northeast of Qinghai-Xizang （Tibet） Plateau. These NE trending faults aren＇t large, and most are located in the active plate. They are all nearly vertical to the axis of the folds and compressive basins.