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Constraining Paleoearthquakes by Combining Faulted Stratigraphy and Microgeomorphology: A Case Study on the Haiyuan Fault, Northwestern China

文献类型：期刊论文

作者Zheng, Wenjun1,2; Bi, Haiyun3; Wang, Xulong4; Zhang, Dongli1,2; Huang, Rong1,2; Zhang, Peizhen1,2; Liu, Xingwang5; Ren, Zhikun3
刊名SEISMOLOGICAL RESEARCH LETTERS
出版日期2021-03-01
卷号92期号:2页码:895-908
ISSN号0895-0695
DOI10.1785/0220200143
通讯作者Zheng, Wenjun(zhengwenjun@mail.sysu.edu.cn)
英文摘要Surface-rupturing strong earthquakes will leave evidence distributed along fault zones. The combination of paleoearthquake trench excavation and faulted microgeomorphic analysis at the same site provides more comprehensive knowledge of paleoearth-quakes than either method could accomplish alone. In this article, we report on our use of trench excavation and dating, together with a 5-cm resolution digital elevation model obtained from an unmanned aerial vehicle based on the structure from motion photogrammetry technology, to investigate the timing and size of strong paleoearth-quake events in the Dashagou site near the west end of the Haiyuan fault, which rup-tured in the 1920 Haiyuan earthquake. The result reveals that at least four strong paleoearthquake events with the same or even higher magnitude (including the 1920 Haiyuan earthquake) have occurred along the west end of the Haiyuan fault since the mid-Holocene. Event IV occurred shortly before 6.0 ka with a horizontal displace-ment of 4.27 +/- 1.50 m and a vertical displacement of 0.70 +/- 0.39 m. Event III occurred at approximately 4.65 +/- 0.45 ka with a horizontal displacement of 5.45 +/- 1.25 m and a vertical displacement of 0.38 +/- 0.23 m. Event II occurred at approximately 1.0 ka with a horizontal displacement of 3.86 +/- 0.90 m and a vertical displacement of 0.55 +/- 0.27 m. The most recent event was the 1920 Haiyuan earthquake, with a horizontal displace-ment of 2.15 +/- 0.82 m and a vertical displacement of 0.26 +/- 0.12 m. From the results of these four events, we can certainly conclude that the fault has mainly maintained the strike-slip kinematic pattern over the past 6 ka. These observations highlight the benefits of combining trench excavation and faulted microgeomorphology to gain a more complete understanding of paleoearthquakes.
资助项目National Key Research and Development Program of China[2017YFC1500101] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0901] ; Guangdong Province Introduced Innovative R&D Team of Geological Processes and Natural Disasters around the South China Sea[2016ZT06N331] ; National Natural Science Foundation of China[41590861] ; National Natural Science Foundation of China[41774049] ; National Natural Science Foundation of China[41602224] ; National Natural Science Foundation of China[41972228] ; National Natural Science Foundation of China[41674051]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者SEISMOLOGICAL SOC AMER
WOS记录号WOS:000631833200002
资助机构National Key Research and Development Program of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Guangdong Province Introduced Innovative R&D Team of Geological Processes and Natural Disasters around the South China Sea ; National Natural Science Foundation of China
源URL[http://ir.ieecas.cn/handle/361006/16176]  
专题地球环境研究所_现代环境研究室
通讯作者Zheng, Wenjun
作者单位1.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China
3.China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China
5.China Earthquake Adm, Lanzhou Inst Seismol, Lanzhou, Peoples R China
推荐引用方式
GB/T 7714		 Zheng, Wenjun,Bi, Haiyun,Wang, Xulong,et al. Constraining Paleoearthquakes by Combining Faulted Stratigraphy and Microgeomorphology: A Case Study on the Haiyuan Fault, Northwestern China[J]. SEISMOLOGICAL RESEARCH LETTERS,2021,92(2):895-908.
APA Zheng, Wenjun.,Bi, Haiyun.,Wang, Xulong.,Zhang, Dongli.,Huang, Rong.,...&Ren, Zhikun.(2021).Constraining Paleoearthquakes by Combining Faulted Stratigraphy and Microgeomorphology: A Case Study on the Haiyuan Fault, Northwestern China.SEISMOLOGICAL RESEARCH LETTERS,92(2),895-908.
MLA Zheng, Wenjun,et al."Constraining Paleoearthquakes by Combining Faulted Stratigraphy and Microgeomorphology: A Case Study on the Haiyuan Fault, Northwestern China".SEISMOLOGICAL RESEARCH LETTERS 92.2(2021):895-908.

入库方式： OAI收割

来源：地球环境研究所

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