【摘要】 通过对党河南山断裂开展野外地质地貌调查、探槽开挖等工作，发现沿北侧断层发育多级断层陡坎。最新陡坎错断冲沟的河漫滩，同时断层西段伴有褶皱活动。在大红沟沟口开挖的地质探槽显示断层错断较新的砾石层，样品测试结果表明断裂最新活动时代至少为全新世中期。2个探槽揭示了同一次地震事件，该事件发生在(4.69±0.40)ka BP之后。更多还原

【Abstract】 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.更多还原