摘要
以活动断裂遥感影像解译标志为基础,利用奥维地图、91卫图等影像资料,结合前人的研究成果,重点分析了甘孜-玉树断裂带当江段的空间展布及几何学与运动学特征;在此基础上对重点段进行野外踏勘,通过一系列的断错地貌现象验证解译结果,最后得到甘孜-玉树断裂带当江段的几何展布。研究结果显示:①甘孜-玉树断裂带当江段总体走向为NWW;②断裂地貌发育有断层陡坎、槽谷、冲沟和河流阶地的左旋位错等;③断裂运动性质以左旋走滑为主,带有垂直的倾滑分量;研究同时表明:①遥感解译对于高寒、高海拔、交通不便的地区开展工作十分重要;②遥感解译对于地表破坏少、植被覆盖少的地区其效果更为直观、更利于在此类地区发挥作用;③活动构造变形强烈地区的遥感影像特征明显,更易于开展遥感解译工作。
Based on the systematic summary of the active fault remote sensing interpretation signs,using the Aowei Map and 91 Weitu maps,combined with the previous research findings,this study focuses on the spatial distribution and geometric and kinematic characteristics of the Ganzi-Yushu fault belt in the Dangjiang section.On this basis,we conduct field surveys for the key sections to verify the interpretation results through a series of faulted geomorphic phenomena.Finally,the geometric distribution of the Ganzi-Yushu fault belt in the Dangjiang section is obtained.The research results show that:1)the overall trend of the Ganzi-Yushu fault belt in the Dangjiang section is NWW;2)the fault geomorphic features developed include fault scarps,gullies,ravines,and left-lateral displacement of river terraces;3)the fault movement nature is predominantly left-lateral strike-slip with a vertical dip component.The study also shows that:1)remote sensing interpretation is very important for working in high-altitude,high-cold,and areas with poor transportation;2)remote sensing interpretation is more intuitive and easier to use in areas with less surface damage and less vegetation coverage;3)the remote sensing image features of active tectonic deformation areas are obvious,making it easier to conduct remote sensing interpretation.
作者
赵琪
余中元
王晓山
陈柏旭
ZHAO Qi;YU Zhongyuan;WANG Xiaoshan;CHEN Baixu(Institute of Disaster Prevention,Sanhe 065201,China;Hebei Earthquake Agency,Shijiazhuang 050021,China)
出处
《华北地震科学》
2024年第3期61-68,共8页
North China Earthquake Sciences
基金
国家重大科学计划“青藏高原第二次综合科学考察”子专题(2019QZKK0901)。
关键词
甘孜-玉树断裂带
巴颜喀拉块体
南边界西端
遥感解译
活动构造
Ganzi-Yushu fault zone
Bayan Har block
western end of southern boundary
remote sensing interpretation
active structure
