Abstract：The North Qaidam Thrust Fault zone is the north boundary fault of the Qaidam Basin, and controls the crustal deformation of northeastern Qaidam Basin. The study on its Late Quaternary slip behavior is important for us to understand the strain distribution pattern of the South Qilian Mountain and the compressional and extensional process of the fault activity into the internal Qaidam Bain. We focus our study on the Amunike segment of the North Qaidam Thrust fault zone, where the fault has obvious linear characteristics, including fault scarp, fault triangle, water system dislocation in the remote sensing image. After study from remote sensing and image interpretation, geological survey, trench excavation, GPS topographic profile survey, OSL geological dating, we find a ca.30 km length surface track on the Amunike segment with continuous obvious surface traces with fault scarp, fault trough, seismic drum beam (package) and water system dislocation. We obtain the average Holocene slip rate of 0.43±0.02 mm/a from the displacement in the alluvial fan and the OSL dating results. The DEM interpretation results show that the left-lateral strike slip rate of 3.38~4.21 mm/a since 13 ka B. P., and 2.50~2.75 mm/a since 5.1 ka B. P.
姚生海, 盖海龙, 刘炜, 殷翔, 张加庆, 姚海峰. 柴达木盆地北缘断裂(阿木尼克山段)构造地貌及晚第四纪活动速率研究[J]. 第四纪研究, 2020, 40(5): 1312-1322.
Yao Shenghai, Gai Hailong, Liu Wei, Yin Xiang, Zhang Jiaqing, Yao Haifeng. Tectonic geomorphology and Late Quaternary slip rate of the Amunike segment， the north Qaidam Thrust Fault Zone. Quaternary Sciences, 2020, 40(5): 1312-1322.
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2020, Vol. 40 
