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 |
ISSN | 0895-0695 |
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. |
DOI | 10.1785/0220200143 |
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 | |
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 |
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. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论