[1]CHANG Yuqiao,LI Xi,ZHOU Qingyun,et al.The Holocene Activity Evidence of Paleo-earthquakes in the Northwestern Segment of the Deqin-Zhongdian Fault[J].Journal of Seismological Research,2023,46(02):261-270.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0023
]
Copy
The Holocene Activity Evidence of Paleo-earthquakes in the Northwestern Segment of the Deqin-Zhongdian Fault
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
46
Number of periods:
2023 02
Page number:
261-270
Column:
Public date:
2023-03-10
- Title:
- The Holocene Activity Evidence of Paleo-earthquakes in the Northwestern Segment of the Deqin-Zhongdian Fault
- Keywords:
- the Deqin-Zhongdian Fault; the Gongka Lake trench; paleo-earthquake; Holocene activity; the Yunnan-Tibet Railway Project
- CLC:
- P315.2
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2023.0023
- Abstract:
- Based on the high-resolution remote sensing interpretation and a detailed field geological and geomorphological survey,we excavate a trench in the linear fault trough beside the Gongka Lake to reveal the direct evidence of the Holocene activity and paleo-earthquake.The trench,which is perpendicular to the fault trace,obviously manifests positive dip-slip faults and shows that the Deqin-Zhongdian Fault has dislocated the Holocene stratum.Through paleoseismic analysis of the relationship between the fault and stratigraphic ages,cracks and colluvial,and the age of sedimentation determined by means of AMS-14C dating,two palaeo-seismic events are identified.They are respectively between(1 140±30)-( 1 010±30)a BP and(570±30)-(410±30)a BP.The segment in the northwest of the Deqin-Zhongdian Fault was an active fault in Holocene and was characterized as positive dip-slip.
- References:
- -
- Similar References:
Memo
-
Last Update:
2023-03-10