[1]王 度,陈立春,李彦宝,等.西藏中部格仁错断裂中段曲巴晚第四纪活动特征与古地震事件[J].华南地震,2024,(04):1-10.[doi:10.13512/j.hndz.2024.04.01]
 WANG Duo,CHEN Lichun,LI Yanbao,et al.Late Quaternary Activities and Paleoearthquakes at Quba Along Middle Segment of Gyaring Co Fault in Central Tibet[J].,2024,(04):1-10.[doi:10.13512/j.hndz.2024.04.01]
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西藏中部格仁错断裂中段曲巴晚第四纪活动特征与古地震事件()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2024年04期
页码:
1-10
栏目:
地震科学研究
出版日期:
2024-12-30

文章信息/Info

Title:
Late Quaternary Activities and Paleoearthquakes at Quba Along Middle Segment of Gyaring Co Fault in Central Tibet
文章编号:
1001-8662(2024)04-0001-10
作者:
王 度1陈立春1李彦宝2杜金花3贾永顺1薛柯依1王旭龙4尹功明2
1.桂林理工大学地球科学学院 广西隐伏金属矿产勘查重点实验室,广西 桂林 541006;2.中国地震局地质研究所地震动力学国家重点实验室,北京 100029;3.长安大学 地球科学与资源学院,西安 710054;4.中国科学院地球环境研究所 黄土与第四纪地质国家重点实验室,西安 710061
Author(s):
WANG Duo1CHEN Lichun1LI Yanbao2DU Jinhua3JIA Yongshun1XUE Keyi1WANG Xulong4YIN Gongming2
1.Guangxi Key Laboratory of Exploration for Hidden Metallic Ore Deposits , College of Earth Sciences , Guilin University of Technology , Guilin 541006, China;2.State Key Laboratory of Earthquake Dynamics , Institute of Geology, China Earthquake Administration , Beijing 100029, China;3.School of Earth Science and Resources , Chang’an University, Xi’an 710054, China;4.State Key Laboratory of Loess and Quaternary Geology , Institute of Earth Environment , Chinese Academy of Sciences , Xi’an 710061, China
关键词:
青藏高原格仁错断裂晚第四纪古地震光释光测年
Keywords:
Tibet PlateauGyaring Co FaultLate QuaternaryPaleoearthquakeOSL dating
分类号:
P315.2
DOI:
10.13512/j.hndz.2024.04.01
文献标志码:
A
摘要:
格仁错断裂晚第四纪古地震研究是理解青藏高原中部构造变形与地震危险性评价关键环节。通过在格仁错断裂中段曲巴开展野外调查、无人机摄影测量、探槽开挖、光释光与碳十四测年工作,探槽揭露出5次古地震事件:E1(59.0±2.1kaBP)、E2(57.1±2.2kaBP)、E3(30.2±1.4kaBP)、E4(12.5±0.6kaBP)、E5(2.2~3.2kaBP)。最新事件的离逝时间已超过2.2±0.3ka,接近估算的MW7.4地震复发间隔,指示格仁错断裂中段存在较强地震风险。
Abstract:
The study of Late Quaternary paleoearthquakes of the Gyaring Co Fault is a key link in understanding the tectonic deformation and seismic hazard assessment in the Central Tibet. This paper conducted field investigations, unmanned aerial vehicle photogrammetry, trench excavation, optically stimulated luminescence (OSL) dating, and radiocarbon dating at Quba along the middle segment of the Gyaring Co Fault. Five paleoearthquakes were identified:E1(59.0±2.1 ka BP),E2(57.1±2.2 ka BP),E3(30.2±1.4 ka BP),E4(12.5± 0.6 ka BP),and E5(2.2-3.2 ka BP). The results reveal that the elapsed time of the latest event is over 2.2±0.3 ka, which approaches the estimated recurrence interval of the MW 7.4 earthquake. It indicates strong seismic risk along the middle segment of the Gyaring Co Fault.

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备注/Memo

备注/Memo:
收稿日期:2024-08-17
基金项目:第二次青藏高原综合科学考察研究(2019QZKK0901);广西自然科学基金(2024GXNSFAA010357);国家自然科学基金(41902219);桂林理工大学科研启动基金(GUTQDJJ2022037)联合资助。
作者简介:王度(1987-),男,博士,副教授,主要从事活动构造与构造地貌、地震地质研究工作。E-mail:wangduo@glut.edu.cn
通信作者:陈立春(1970-),男,博士,研究员,主要从事活动构造、古地震与地震安全性评价研究工作。E-mail:glutclc@glut.edu.cn
更新日期/Last Update: 2024-12-30