Through the field geological and geomorphological survey and trench excavation of the Danghe nanshan fault,it is found that multi-level fault scarps are developed along the north side of the fault,and the latest scarps break the floodplain of the gully,while the west section of the fault is accompanied by fold activity;The geological exploration trench excavated at the mouth of Dahonggou gully shows that the fault has dislocated a relatively new gravel layer.The sample test results show that the latest active age of the fault is at least the middle Holocene;Two trenches revealed the same seismic event,which occurred after(4.69±0.40)ka BP.
关键词
肃北地区/党河南山断裂/陡坎/全新世中期
Key words
Su Bei area/Danghenanshan fault/Fault scarp/Mid-Holocene
维普
万方数据