西藏自治区地震构造特征分析  

Analysis of Seismic Tectonic Characteristics in Xizang Autonomous Region

作　　者：张建龙 贡秋卓玛 Zhang Jianlong;Gongqiu Zhuoma(Xizang Autonomous Region Seismological Bureau,Lhasa 850000,China)

机构地区：[1]西藏自治区地震局,拉萨850000

出　　处：《西藏科技》2024年第12期13-18,40,共7页Xizang Science And Technology

摘　　要：通过第一次全国自然灾害综合风险普查项目,收集整理了相关学者的研究成果,对西藏部分断裂进行了卫星影像遥感解译。归纳总结后,得出西藏自治区地震构造具有以下特征:地震构造在前期表现为逆冲推覆、中期走滑挤出和后期伸展坍塌的构造特征,靠近大陆板块边界处的挤压方向近南北向,远离板块边界处逐渐转为北北东向,总体处于近东西向伸展与挤出变形环境。Through the first national comprehensive risk survey of natural disaster,the results of research conducted before were collected and collated,and satellite images of part of fault in Xizang were interpreted by remote sensing.After summarizing,the seismic tectonic characteristics in Xizang were derived as the following.The seismic structures is characterized by thrust-overthrust in the early stage,followed by strike-slip extrusion in the middle stage,and extensional collapse in the later stage.The extrusion direction near the the continental plate boundary is nearly north-south,and it gradually turns to north-north-east in the area which is away from the plate boundary.It is generally in a near-east-west extension and extrusion deformation environment.

关 键 词：自然灾害普查 构造特征 西藏 

分 类 号：G63[文化科学—教育学]