First author:Huang Feipeng(1993-), male, Hanyuan County, Sichuan Province, Master student. Research areas include active tectonics and tectonic geomorphology. E-mail:huangfeipeng5@gmail.com
The Eastern Kunlun fault zone (EKLF) is a large left-lateral strike-slip fault, whose slip rate is meaningful to seismic hazard assessment and geodynamics of the Tibetan Plateau. Previous studies suggested that the late Quaternary average slip rate was stable and uniform (10~13 mm/a) in the central and western segment of the EKLF. But there were a few researches of accurate slip rate in the central segment on the EKLF. Therefore, we focused on an offset and well preserved alluvial fan from Xiugou basin, located in the east of Xidatan-Dongdatan, to make it clear. Moreover, we used high-resolution satellite images and digital elevation model extracted from SPOT7 stereo image pairs to restore the offset alluvial fan, and combined terrestrial cosmogenic nuclides method, including 13 quartz-rich samples from this fan surface, 1 quartz-rich sample from the main active channel bed and 1 10Be depth profile from this fan edge to eliminate the 10Be concentration of inheritance accurately, with 1 optically stimulated luminescence sample to obtain the reliable age of this alluvial fan together. Referring to field observations, this alluvial fan was offset left-laterally by (1 862±103) m, and its age is (76.55±3.20)~(106.37±3.38) ka which can be determined through the actual geologic setting and improving chi-square test. Thus, we used the Monte Carlo method to obtain a left-lateral slip rate of (20.3+3.5/-2.3) mm/a with 68% confidence envelopes since the late Pleistocene in the Xiugou basin. As a result, combining with the results of previous studies, the left-lateral slip rate indicated that the obviously decreasing activity transferred from late Pleistocene to Holocene on the central segment of the EKLF.
Keywords：Eastern Kunlun fault zone
;
Xiugou Basin
;
Slip rate
;
Offset alluvial fan
;
Cosmogenic nuclides dating.
Fig.1 Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a)
Fig. 11 Displacement-age plot of middle segment from eastern Kunlun fault zone based on offset landform Rectangular box, displacement-age envelope; Black & grey line, slip history path; Light grey & red area, median slip history with 68% & 95% confidence envelopes
Holocene earthquake deformation zones and their displacement and slip rate along the Xidatan-Dongdatan of Kusai-Maqu fault in northern Qinghai-Xizang Plateau
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Uniform postglacial slip-rate along the central 600km of the Kunlun Fault (Tibet), from 26Al, 10Be, and 14C dating of riser offsets, and climatic origin of the regional morphology
Surface ruptures associated with the 1937 M 7.5 Tuosuo Lake and the 1963 M 7.0 Alake Lake Earthquakes and the Paleoseismicity along the Tuosuo Lake Segment of the Kunlun Fault, Northern Tibet
[J]. Bulletin of the Seismological Society of America, 2007, 97(2): 474-496.
Seismological Bureau of Qinghai Province, Institute of Crustal Dynamics of China Earthquake Administration. Eastern Kunlun Active Fault Zone[M]. Beijing: Seismological Press, 1999.
Fletcher K EK, Rockwell TK, Sharp W D. Late Quaternary slip rate of the southern Elsinore fault, Southern California: Dating offset alluvial fans via 230Th/U on pedogenic carbonateSouthern California: Dating offsluvial fans via 230Th/U on pedogenic carbonate[J]. Journal of Geophysical Research Earth Surface, 2011, 116(F2). DOI:10.1029/2010JF001701.
Late Pleistocene/Holocene slip rate of the Zhangye thrust (Qilian Shan, China) and implications for the active growth of the northeastern Tibetan Plateau
Cosmogenic 10Be and 36Cl geochronology of offset alluvial fans along the northern Death Valley fault zone: Implications for transient strain in the eastern California shear zone
[J]. Journal of Geophysical Research Solid Earth, 2007, 112(B6). DOI: 10.1029/2006JB004350.
Late Quaternary glacial history of the Karlik Range, easternmost Tian Shan, derived from 10Be surface exposure and optically stimulated luminescence datings
Uniform postglacial slip-rate along the central 600km of the Kunlun Fault (Tibet), from 26Al, 10Be, and 14C dating of riser offsets, and climatic origin of the regional morphology
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
Surface ruptures associated with the 1937 M 7.5 Tuosuo Lake and the 1963 M 7.0 Alake Lake Earthquakes and the Paleoseismicity along the Tuosuo Lake Segment of the Kunlun Fault, Northern Tibet
... Geometric distribution and previous slip-rate studies of the Eastern Kunlun fault zone[7,8,9,10,11,12,13,14,15,16,17,18,19,20] EKLF:Eastern Kunlun Fault Zone; HF:Haiyuan Fault zone; AWCF:Awancang Fault; GYF:Ganzi-Yushu Fault zone; XSF:Xianshui River Fault zone;LRBF:Longriba Fault zone; MJF:Minjiang fault; HYF:Huya Fault; LMSF:Longmenshan Fault zone. The data of white circle from reference[7], the data of light brown circle from reference[8], the data of light blue circle from reference[9], the data of black circle from reference[10], the data of light green circle from reference[11], the data of purple circle from reference[12], the data of white square from reference[13], the data of deep green circle from references[7] and [14], the data of red circle from reference[15], the data of red square from reference[16], the data of pink square from reference[17], the data of light green square from reference[18](the unit of slip-rate: mm/a) ...
Late Pleistocene/Holocene slip rate of the Zhangye thrust (Qilian Shan, China) and implications for the active growth of the northeastern Tibetan Plateau
Cosmogenic 10Be and 36Cl geochronology of offset alluvial fans along the northern Death Valley fault zone: Implications for transient strain in the eastern California shear zone
Late Quaternary glacial history of the Karlik Range, easternmost Tian Shan, derived from 10Be surface exposure and optically stimulated luminescence datings
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