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The Holocene Activity Evidence of the Yema River-Daxue Mountain Fault in Western Qilian Mountain

文献类型：期刊论文

作者Luo Hao1,2,3; He Wengui2,3; Yuan Daoyang2,3; Shao Yanxiu2,3
刊名ACTA GEOLOGICA SINICA-ENGLISH EDITION
出版日期2013-12-01
卷号87期号:6页码:1569-1584
关键词Paleoearthquake Earthquake Recurrence Interval Reference Magnitude Yema River-daxue Mountain Fault Altyn Tagh Fault
DOI10.1111/1755-6724.12160
文献子类Article
英文摘要Altyn Tagh fault controls the deformation characteristics of the northern margin of the Qinghai-Tibet Plateau. The sinistral slip rate of the eastern segment of the fault reduces gradually where the reduction transforms into the deformation within Qilian Mountain, forming a series of thrust faults and strike-slip faults. Among them, the Yema River-Daxue Mountain fault is one of the important structural transform faults in the study area. Based on the differences of the geometrical characteristics and activities, the fault is divided into four segments, the Yema River segment, the Shibandun segment, the Liushapo segment and the Baishitougou segment, among which the former three are Holocene active faults, and the Baishitougou segment belongs to late Pleistocene fault. The excavated trenches imply a total of 6 paleoearthquake events, and at least 4 events have occurred during Holocene, whose occurrence times are 8300 +/- 700 yr BP, 6605 +/- 140 yr BP, 4540 +/- 350 yr BP, 2098 +/- 47 yr BP, respectively. The recurrence interval is 2600 +/- 600 yr BP that is close to the lapsed time of the last one, 2098 +/- 47 yr BP, which suggests that the Yema River-Daxue Mountain fault is in a high risk of major earthquakes in the future. The vertical coseismic displacements of the four Holocene paleoearthquake events are 100 cm, 42 cm, 40 cm and 50 cm, respectively, the horizontal coseismic displacements are 5 m, 4.5-5.5 m, 5-8 m and 4-5.5 m, separately, and then the reference magnitude of the paleoearthquake events is conjectured to be M7.6 +/- 0.1.
WOS关键词ALTYN TAGH FAULT ; TIBETAN PLATEAU ; GREAT EARTHQUAKES ; SLIP RATES ; CHINA ; DEFORMATION ; RECURRENCE ; GANSU ; PROVENANCE ; TECTONICS
WOS研究方向Geology
语种英语
WOS记录号WOS:000328541900010
资助机构National Natural Science Foundation of China(40872132 ; National Natural Science Foundation of China(40872132 ; Chinese Academy of Sciences(XDB03020201) ; Chinese Academy of Sciences(XDB03020201) ; 41030317) ; 41030317) ; National Natural Science Foundation of China(40872132 ; National Natural Science Foundation of China(40872132 ; Chinese Academy of Sciences(XDB03020201) ; Chinese Academy of Sciences(XDB03020201) ; 41030317) ; 41030317)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62632]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Engn Geomech, Beijing 100029, Peoples R China
2.China Earthquake Adm, Earthquake Res Inst Lanzhou, Lanzhou 730000, Gansu, Peoples R China
3.Lanzhou Natl Geophys Observ, Lanzhou 73000, Gansu, Peoples R China
推荐引用方式
GB/T 7714		 Luo Hao,He Wengui,Yuan Daoyang,et al. The Holocene Activity Evidence of the Yema River-Daxue Mountain Fault in Western Qilian Mountain[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2013,87(6):1569-1584.
APA Luo Hao,He Wengui,Yuan Daoyang,&Shao Yanxiu.(2013).The Holocene Activity Evidence of the Yema River-Daxue Mountain Fault in Western Qilian Mountain.ACTA GEOLOGICA SINICA-ENGLISH EDITION,87(6),1569-1584.
MLA Luo Hao,et al."The Holocene Activity Evidence of the Yema River-Daxue Mountain Fault in Western Qilian Mountain".ACTA GEOLOGICA SINICA-ENGLISH EDITION 87.6(2013):1569-1584.

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来源：地质与地球物理研究所

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