中文摘要：

抵消似地球形状的特征，使变形的晚第四级的阶层沿着 Langshan-Seertengshan 山麓差错(LSPF ) 显示活跃变丑，在 Hetao 的最活跃的差错之一在内部蒙古指责地区，诺思中国。沿着 LSPF 的基岩差错陡坡的普遍出现提供优秀机会检验指责的历史。用 cosmogenic ¹⁰ 是标明日期的暴露，我们测量了西方的 Langshankou 陡坡的暴露年龄，在 LSPF 的中间的片断定位了。我们的数据揭示了发生在 22.2 湡 ? 楬敭瑳湯 ?爠獥数瑣癩汥 的至少二地震吗？

英文摘要：

Offset geomorphic features and deformed late Quaternary strata indicate active deformation along the Langshan-Seertengshan piedmont fault （LSPF）, one of the most active faults in the Hetao fault zone in Inner Mongolia, North China. The widespread occurrence of bedrock fault scarps along the LSPF offers excellent opportunity to examine the faulting history. Using cosmogenic ^10Be exposure dating, we measured the exposure ages of the western Langshankou scarp, located in the middle segment of the LSPF. Our data revealed at least two earthquakes that occurred at 22.2±3.3 Ira and 7.2±2.4 ka, respectively. These events are consistent with previous paleoseismic trench studies. The regression of the relationship between the age and sampling height along the scarp yield a fault slip rate of 0.10 ±0.05/-0.06 mm/yr, which is significantly lower than the average post-late Pleistocene fault slip rate of ~1 mm/yr, as estimated from the offset of the T2 terraces by previous studies. This indicates that the slip of the LSPF may have been accommodated by other fault branches.