成都理工大学学报（自然科学版）2024，Vol.51Issue(6)：1048-1056,1069,10.DOI:10.3969/j.issn.1671-9727.2024.06.12
喜马拉雅北缘丁木错地堑第四纪软沉积物变形构造
Quaternary soft-sediment deformation structures in the Dingmucuo graben,northern Himalaya
摘要
Abstract
Through a field geological survey,the genetic mechanism of Quaternary soft-sediment deformation structures in the Dingmucuo graben in the northern Himalaya are analyzed,and their response to regional tectonic activity is discussed.In the Quaternary lacustrine deposits of the Dingmucuo graben,soft-sediment deformation structures such as load structures,flame structures,liquefied sandstone veins,and the presence of stretched"soft pudding"structures and slump structures have developed,and the associated production of micro-normal faults,synsedimentary faults,and step faults can be seen.The development of such soft-sediment deformation structures was clearly controlled by an active normal fault running through the Dingmucuo,indicating the characteristics of earthquake-triggered soft-sediment deformation structures.The combination types,distribution characteristics,and tectonic setting of the Quaternary soft-sediment deformation structures in the Dingmucuo graben indicate that it is the product of paleoseismic events,which arose due to tectonic activity.Combined with the increase of seismic activity along the Dingmucuo fault in recent years,our study shows that there is still a risk of potential seismic activity in this area in the near future.关键词
软沉积物变形构造/丁木错地堑/古地震事件/第四纪/喜马拉雅Key words
soft-sediment deformation structure/Dingmucuo graben/paleoseismic event/Quaternary/Himalaya分类
天文与地球科学引用本文复制引用
李楠,刘陇强,朱利东,杨文光,刘强,周豫..喜马拉雅北缘丁木错地堑第四纪软沉积物变形构造[J].成都理工大学学报（自然科学版）,2024,51(6):1048-1056,1069,10.基金项目
中国地质调查局项目(DD20220989) （DD20220989）
国家自然科学基金项目(41972118). （41972118）
