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Seismic history of a bedrock fault scarp using quantitative morphology together with multiple dating methods: A case study of the Luoyunshan piedmont fault, southwestern Shanxi Rift, China
Zou, Junjie1,5; He, Honglin1,6; Yokoyama, Yusuke2,4; Shirahama, Yoshiki3; Sproson, Adam D.4; Wei, Zhanyu1,6; Shi, Feng1,6; Hao, Haijian1,6; Miyairi, Yosuke4; Lu, Lixing5; Su, Peng1,6; Zhou, Chao1,6
2020-08-05
Source PublicationTECTONOPHYSICS
ISSN0040-1951
Volume788Pages:18
AbstractThe study of bedrock fault scarps is a useful approach to identify paleo-earthquakes and acquire the faulting history in bedrock areas where traditional trench techniques are not applicable. Here, we report a study on the Luoyunshan piedmont fault (LYSPF), southwestern Shanxi Rift, China. Although several studies have analyzed the LYSPF, its faulting behavior is still under debate. For example, the tectonic geomorphology fails to determine the frequency of past slips and the elapsed time. To address these problems, we investigated two bedrock fault surfaces, Luoyuncun (northern segment) and Weicun (southern segment) using quantitative morphology analyses together with multiple Quaternary dating techniques. Quantitative morphology analysis shows that both bedrock fault surfaces have the characteristics of vertical segmentation. This kind of segmentation indicates that the fault surfaces are exhumed intermittently, likely owing to periodic faulting earthquakes. Therefore, earthquake events can be identified as morphological segments, and the corresponding co-seismic displacement can be determined by the height of these segments. According to the results from the quantitative morphology and dating techniques, four seismic events, with a co-seismic vertical displacement of 0.9 m, 0.82 m, 1.64 to 2.38m and 2.30 to 2.54 m, on the northern segment occurred during the late Pleistocene, whereas, two seismic events, with a co-seismic vertical displacement of similar to 1.33m and 1 to 1.08m are identified on the southern segment occurred during the Holocene. Combined with the results of knickpoint series and trench techniques of the LYSPF, eight paleo-earthquake events were identified since 45 ka, with an average recurrence interval of 5.8 kyr. The more complete paleo-earthquake sequence also showed the possibility that the variation of the slip rate along the LYSPF depends on the segment, and that the displacement produced by the Linfen M 71/2 earthquake of 649 CE has been recorded at the WC fault surface.
KeywordPaleo-earthquake history Bedrock fault surface morphology Cosmogenic nuclide Cl-36 dating OSL dating Radiocarbon dating Luoyunshan piedmont fault
DOI10.1016/j.tecto.2020.228473
Funding OrganizationNational Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China
WOS KeywordIDENTIFYING PAST EARTHQUAKES ; COSMOGENIC CL-36 ; SURFACE-ROUGHNESS ; SLIP HISTORY ; CENTRAL APENNINES ; ORDOS BLOCK ; TOPOGRAPHY ; GREECE ; RATES ; DEFORMATION
Language英语
Funding ProjectNational Science Foundation of China[41872213] ; National Science Foundation of China[U1939201] ; National Science Foundation of China[41702221] ; National Science Foundation of China[41602206]
Funding OrganizationNational Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000540731100001
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96920
Collection其他部门
Corresponding AuthorHe, Honglin
Affiliation1.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing 100029, Peoples R China
2.Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Tokyo 2778564, Japan
3.Natl Inst Adv Ind Sci & Technol, Res Inst Earthquake & Volcano Geol, Tsukuba, Ibaraki 3058567, Japan
4.Univ Tokyo, Atmosphere & Ocean Res Inst, Tokyo 2778564, Japan
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
6.Shanxi Taiyuan Continental Rift Dynam Natl Observ, Taiyuan 030025, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zou, Junjie,He, Honglin,Yokoyama, Yusuke,et al. Seismic history of a bedrock fault scarp using quantitative morphology together with multiple dating methods: A case study of the Luoyunshan piedmont fault, southwestern Shanxi Rift, China[J]. TECTONOPHYSICS,2020,788:18.
APA Zou, Junjie.,He, Honglin.,Yokoyama, Yusuke.,Shirahama, Yoshiki.,Sproson, Adam D..,...&Zhou, Chao.(2020).Seismic history of a bedrock fault scarp using quantitative morphology together with multiple dating methods: A case study of the Luoyunshan piedmont fault, southwestern Shanxi Rift, China.TECTONOPHYSICS,788,18.
MLA Zou, Junjie,et al."Seismic history of a bedrock fault scarp using quantitative morphology together with multiple dating methods: A case study of the Luoyunshan piedmont fault, southwestern Shanxi Rift, China".TECTONOPHYSICS 788(2020):18.
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