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Constraining Paleoearthquakes by Combining Faulted Stratigraphy and Microgeomorphology: A Case Study on the Haiyuan Fault, Northwestern China
Zheng, Wenjun1,2; Bi, Haiyun3; Wang, Xulong4; Zhang, Dongli1,2; Huang, Rong1,2; Zhang, Peizhen1,2; Liu, Xingwang5; Ren, Zhikun3
通讯作者Zheng, Wenjun(zhengwenjun@mail.sysu.edu.cn)
2021-03-01
发表期刊SEISMOLOGICAL RESEARCH LETTERS
ISSN0895-0695
卷号92期号:2页码:895-908
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.
DOI10.1785/0220200143
收录类别SCI ; SCI
语种英语
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
项目资助者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
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000631833200002
出版者SEISMOLOGICAL SOC AMER
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/16177
专题现代环境研究室
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
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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.
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