SURFACE DEFORMATION CHARACTERISTICS AND CAUSESOF THE DENGMECUO SEGMENT IN THE XIZANGDINGRI M、6.8 EARTHOUAKE

SEISMOLOGY AND GEOLOGY ›› 2025, Vol. 47 ›› Issue (1): 80-89.

SURFACE DEFORMATION CHARACTERISTICS AND CAUSESOF THE DENGMECUO SEGMENT IN THE XIZANGDINGRI M、6.8 EARTHOUAKE

LIANG Ming-jian¹⁾,DONG Yun-xi¹⁾,ZU0 Hong¹⁾,DAI You-lin¹⁾,XIA0 Ben-fu¹⁾,LIA0 Cheng¹⁾,TAN Ling¹⁾,WANG Yu-wei¹⁾,LI Xiang¹⁾,TANG Cai-cheng²⁾,ZHANG Wei¹⁾,ZHANG Hui-ping³⁾,MENG Ling-yuan⁴⁾,SU Jin-rong¹⁾,WU Wei-wei¹⁾,LI Chuan-you³⁾,YAN Mei²⁾

1)Sichuan Earthquake Ageney, Chengdu 61004l, China
2)Sichuan Seistech Corporation Lid, Chengdu 610041,China
3)State Key Laboratory of Earthquake Dynamies and Forecasting, Instilute of Geology,China Earthquake Administration, Beijing 100029,China
4)China Earthquake Netorks Center, Beijing100045，China

Online:2025-02-01 Published:2025-03-04

2025年西藏定日6.8级地震登么错段地表变形特征及其成因

梁明剑¹⁾,董芸希¹⁾,左洪¹⁾,代友林¹⁾,肖本夫¹⁾,廖程¹⁾,谭凌¹⁾,王余伟¹⁾,李响¹⁾,汤才成²⁾,张威¹⁾,张会平³⁾,孟令媛⁴⁾,苏金蓉¹⁾,吴微微¹⁾,李传友³⁾,严媚²⁾

1)四川省地震局，成都　610041
2)四川赛思特科技有限责任公司，成都　610041
3)地震动力学与强震预测全国重点实验室(中国地震局地质研究所)北京　100029
4)中国地震台网中心，北京　100045

Abstract

Key words: the Xizang Dingri M,6.8 earthquake, Dingmucuo fault, Surface deformation zone, Active rift system

摘要： 2025年西藏定日6.8级地震发生在申扎-定结裂谷系南段，其发震断裂为登么错断裂,并形成长约 26km 的地震地表破裂带和形变带。其中,北段的破裂带主要呈正断性质，垂直同震位错量达 2~3m;南段(登么错段)的地表变形带主要分布于登么错湖东侧，宽达上百米,且变形性质复杂，既有拉张变形，又有挤压变形。在南段的拉张变形带中，与NNE向断层陡坎展布一致的变形带，可能是具有构造意义的地震地表破裂带。而挤压变形带应是地震中因拉张变形作用影响形成的次生地表变形带，与地震震动、场地地形地貌、沉积特征和气候条件有关,与发震断裂的活动无直接关系。

关键词: 西藏定日6.8级地震, 登么错断裂, 地表变形带, 活动裂谷系

CLC Number:

P315.2

LIANG Ming-jian, DONG Yun-xi, ZU Hong, DAI You-lin, XIA Ben-fu, LIA Cheng, TAN Ling, WANG Yu-wei, LI Xiang, TANG Cai-cheng, ZHANG Wei, ZHANG Hui-ping, MENG Ling-yuan, SU Jin-rong, WU Wei-wei, LI Chuan-you, YAN Mei. SURFACE DEFORMATION CHARACTERISTICS AND CAUSESOF THE DENGMECUO SEGMENT IN THE XIZANGDINGRI M、6.8 EARTHOUAKE[J]. SEISMOLOGY AND GEOLOGY, 2025, 47(1): 80-89.

梁明剑, 董芸希, 左洪, 代友林, 肖本夫, 廖程, 谭凌, 王余伟, 李响, 汤才成, 张威, 张会平, 孟令媛, 苏金蓉, 吴微微, 李传友, 严媚. 2025年西藏定日6.8级地震登么错段地表变形特征及其成因[J]. 地震地质, 2025, 47(1): 80-89.

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