沉积与特提斯地质2025，Vol.45Issue(2)：434-445,12.DOI:10.19826/j.cnki.1009-3850.2025.06004
定日Ms6.8和积石山Ms6.2地震诱发地质灾害发育特征对比研究
Comparative study on the development characteristics of co-seismic geohazards from the Dingri Ms6.8 and Jishishan Ms6.2 earthquakes
摘要
Abstract
The 2025 Ms6.8 Dingri earthquake and the 2023 Ms6.2 Jishishan earthquake were two recent strong seismic events that occurred in the southern and northern parts of the Qingzang(Tibet)Plateau,respectively.Both events triggered significant co-seismic geohazards.However,due to differences in fault types,geomorphology,and geological conditions,the types,spatial distribution,and development density of the co-seismic geohazards in the impact zones of the two earthquakes exhibited notable differences.To reveal the differences in the development patterns of geohazards triggered by normal and thrust faulting earthquakes,this study employed field investigations,remote sensing interpretation,and spatial analysis to compare the distribution patterns and controlling factors of geohazards in the impact zones of the Dingri and Jishishan earthquakes.The results indicate that the vertical spatial distribution of co-seismic geohazards triggered by the two earthquakes was inversely related:the Dingri earthquake(normal fault)primarily occurred in the upper plate,while the Jishishan earthquake(thrust fault)mainly occurred in the lower plate.The study found that the lithological and geomorphological characteristics of the earthquake impact zones were the primary controlling factors for the differences in the types and densities of earthquake-induced geohazards.Specifically,both earthquake zones were dominated by collapses and landslides,but the distribution patterns differed:In the Dingri earthquake zone,geohazards were linearly distributed along rivers with relatively low densities,while in the Jishishan earthquake zone,geohazards were scattered along the edges of loess platforms or deeply incised valleys with relatively high densities.Comprehensive analysis suggests that when assessing the risk and preventability of earthquake-induced geohazards in seismically active areas,it is essential to consider the combined effects of factors such as special lithological and geomorphological conditions,climate,and terrain.关键词
定日地震/积石山地震/地震诱发地质灾害/地震滑坡/控灾因子Key words
Dingri earthquake/Jishishan earthquake/co-seismic geohazards/co-seismic landslide/control factors分类
天文与地球科学引用本文复制引用
董磊,铁永波,高云建,张宪政,秦雅东,李光辉,宁志杰,史安文..定日Ms6.8和积石山Ms6.2地震诱发地质灾害发育特征对比研究[J].沉积与特提斯地质,2025,45(2):434-445,12.基金项目
西藏自治区自然科学基金重点项目(XZ202401ZR0073) （XZ202401ZR0073）
西藏重点研发计划项目(XZ202401ZY0029) （XZ202401ZY0029）
重点地区特大地质灾害链调查评价(DD202306004) （DD202306004）
