Abstract
The M S6.4 Menyuan earthquake occurred on the northern side of the Lenglongling fault (LLLF) in the mid-western of the Qilian-Haiyuan fault zone on January 21, 2016. The earthquake epicenter was distant from the Minle-Damaying and Huangcheng-Shuangta faults, eastern of the Northern Qilian Shan fault zone. A near northwest-striking rupture plane intersects the two faults at a certain angle. The focal mechanism solution shows that this was a thrust-type earthquake, slightly different from the strike-slip movement with a thrust component of the LLLF. Field geological mapping, tectonic geomorphology analysis, trench excavation and 14C dating reveal that (1) the LLLF has been obviously active since the Holocene, and may behave with characteristic slip behavior and produce M W7.3–7.5 earthquakes; (2) the LLLF appears as a flower structure in terms of structure style, and dips NNE at a steep angle; and (3) the most recent earthquake event occurred after 1815–1065 a BP. An associated fault, the Northern Lenglongling fault (NLLLF), is located at the northwestern end of the LLLF. Consequently, the NLLLF was continually subject to tectonic pushing effects from the left-lateral shear at the end of the LLLF, and, accordingly, it bent and rotated outward tectonically. Subsequently, the fault deviated from the dominant rupture azimuth and activity weakened. In the late Quaternary, it behaved as a thrust fault with no obvious deformation at the surface. This is indicated by the arc shape, with a micro-protrusion northeastward, and no geologic or geomorphic signs of surface rupturing since the late Quaternary. However, such faults could still rupture at depth, producing moderate-strong earthquakes. The geometric and kinematic properties of the NLLLF are in good agreement with the occurrence and kinematic properties of nodal plane 2, and with the distribution characteristics of the aftershocks and seismic intensity. Therefore, the NLLLF is a more suitable seismogenic structure for the M S 6.4 Menyuan earthquake. In addition, the thrust movement of the NLLLF accommodates subsequent movement of the LLLF. During the historical evolution of the NLLLF, the LLLF and the NLLLF have affected the local topography through tectonic uplift.
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References
Chen W B. 2003. Principal features of tectonic deformation and their generation mechanism in the Hexi Corridor and its adjacent regions since late Quaternary (in Chinese). Dissertation for Doctoral Degree. Beijing: Institute of Geology, China Earthquake Administration. 52–54
Deng Q D, Liu B C, Zhang P Z, Yuan D Y. 1992a. Research of active fault in evaluating engineering safety and assessing amount of displacement (in Chinese). In: Deng Q D, ed. Research on Active Fault (2). Beijing: Seismological Press. 236–244
Deng Q D, Yu G H, Ye W H. 1992b. Relationship between earthquake magnitude and parameters of surface ruptures associated with historical earthquakes (in Chinese). In: Deng Q D, ed. Research on Active Fault (2). Beijing: Seismological Press. 247–264
Deng Q D, Zhang P Z, Ran R K, Yang X P, Min W, Chu Q Z. 2003. Basic characteristics of active tectonics of China. Sci China Ser D-Earth Sci, 46: 356–372
Deng Q D, Zhu A L, Gao X. 2014. Re-evaluation of seismogenic and occurrence conditions of large earthquakes on strike-slip faults (in Chinese). Seismol Geol, 36: 562–573
Duvall A R, Clark M K. 2010. Dissipation of fast strike-slip faulting within and beyond northeastern Tibet. Geology, 38: 223–226
Fu B H, Awata Y, Du J G, He W G. 2005. Late Quaternary systematic stream offsets caused by repeated large seismic events along the Kunlun fault, northern Tibet. Geomorphology, 71: 278–292
Fu B H, Shi P L, Wang P, Li Q, Kong P, Zheng G D. 2009. Geometry and kinematics of the Wenchuan earthquake surface ruptures around the Qushan Town of Beichuan County, Sichuan: Implications for mitigation of seismic and geologic disasters (in Chinese). Chin J Geophys, 52: 485–495
Gao R, Wang H Y, Yin A, Dong S W, Kuang Z Y, Zuza A V, Li W H, Xiong X S. 2013. Tectonic development of the northeastern Tibetan Plateau as constrained by high-resolution deep seismic-reflection data. Lithosphere, 5: 555–574
Gaudemer Y, Tapponnier P, Meyer B, Peltzer G, Guo S M, Chen Z T, Dai H G, Cifuentes I. 1995. Partitioning of crustal slip between linked, active faults in the eastern Qilian Shan, and evidence for a major seismic gap, the “Tianzhu gap”, on the western Haiyuan Fault, Gansu (China). Geophys J Int, 120: 599–645
Han Z J, Lu F S, Ji F J, Zeng X F, An Y F. 2012. Seismotectonics of the 26 November 2005 Jiujiang-Ruichang, Jiangxi, M s5.7 earthquake. Acta Geol Sin-Engl Ed, 86: 497–509
Han Z J, Ren Z K, Wang H, Wang M M. 2013. The surface rupture signs of the Lushan “4·20” MS 7.0 earthquake at Longmen Township, Lushan County and its discussion (in Chinese). Seismol Geol, 35: 388–397
He W G, Liu B C, Yuan D Y, Yang P. 2000. Research on slip rates of the Lenglongling active fault zone (in Chinese). Northwestern Seismol J, 22: 90–97
He W G, Liu B C, Yuan D Y. 2001. Preliminary research on the paleoearthquake along the Lenglonging active fault zone. In: Wang Y P, ed. Research on Active Fault (8). Beijing: Seismological Press. 64–74
He W G, Yuan D Y, Ge W P, Lu H. 2010. Determination of the slip rate of the Lenglongling fault in the middle and eastern segments of the Qilian Mountain active fault zone (in Chinese). Earthquake. 30: 131–137
Hou K M. 1998. The geometric segmentation and kinematics characteristics of Huangcheng-Shuangta fault zone (in Chinese). South Chin J Seismol, 18: 28–34
Hu C Z, Yang P X, Li Z M, Huang S T, Zhao Y, Chen D, Xiong R W, Chen Q Y. 2016. Seismogenic mechanism of the 21 January 2016 Menyuan, Qinghai MS6.4 earthquake (in Chinese). Chin J Geophys, 59: 1637–1646
Institute of Geology, State Seismological Bureau, Lanzhou Institute of Earthquake, State Seismological Bureau. 1993. The Qilian Mountain-Hexi Corridor Active Fault System (in Chinese). Beijing: Seismological Press. 91–92
Klinger Y, Etchebes M, Tapponnier P, Narteau C. 2011. Characteristic slip for five great earthquakes along the Fuyun fault in China. Nat Geosci, 4: 389–392
Lasserre C, Gaudemer Y, Tapponnier P, Mériaux A S, Van der Woerd J, Daoyang Y, Ryerson F J, Finkel R C, Caffee M W. 2002. Fast late Pleistocene slip rate on the Leng Long Ling segment of the Haiyuan fault, Qinghai, China. J Geophys Res, 107: ETG 4-1–ETG 4-15
Li H B, Van der Woerd J, Sun Z M, Si J L, Tapponnier P, Pan J W, Liu D L, Chevalier M L. 2012. Co-seismic and cumulative offsets of the recent earthquakes along the Karakax left-lateral strike-slip fault in western Tibet. Gondwana Res, 21: 64–87
Liang S M, Gan W J, Shen C Z, Xiao G R, Liu J, Chen W T, Ding X G, Zhou D M. 2013. Three-dimensional velocity field of present-day crustal motion of the Tibetan Plateau derived from GPS measurements. J Geophys Res- Solid Earth, 118: 5722–5732
Peltzer G, Tapponnier P. 1988. Formation and evolution of strike-slip faults, rifts, and basins during the India-Asia Collision: An experimental approach. J Geophys Res, 93: 15085–15117
Sylvester A G. 1988. Strike-slip faults. Geol Soc Am Bull, 100: 1666–1703
Tapponnier P, Molnar P. 1977. Active faulting and tectonics in China. J Geophys Res, 82: 2905–2930
Wang H Y, Gao R, Yin A, Xiong X S, Kuang C Y, Li W H, Huang W Y. 2012. Deep structure geometry features of Haiyuan Fault and deformation of the crust revealed by deep seismic reflection profiling (in Chinese). Chin J Geophys, 55: 3902–3909
Wells D L, Coppersmith K J. 1994. New empirical relationships among magnitude, rupturelength, rupture width, rupture area, and surface displacement. Bull Seismol SocAm, 84: 974–1002
Wesnousky S G. 2008. Displacement and geometrical characteristics of earthquake surface ruptures: Issues and implications for seismic-hazard analysis and the process of earthquake rupture. Bull Seismol Soc Am, 98: 1609–1632
Wu G H. 1984. A preliminary observation on neoglaciation in Qilian mountains (in Chinese). J Glaciol Cryop, 6: 53–60
Xu X W, Chen G H, Yu G H, Chen J, Tian X B, Zhu A L, Wen X Z. 2013. Seismogenic structure of Lushan earthquake and its relationship with Wenchuan earthquake (in Chinese). Earth Sci Front, 20: 11–20
Xu X W, Jiang G Y, Yu G H, Wu X Y, Zhang J G, Li X. 2014. Discussion on seismogenic fault of the Ludian MS 6.5 earthquake and its tectonic attribution (in Chinese). Chin J Geophys, 57: 3060–3068
Xu X W, Wen X Z, Yu G H, Chen G H, Klinger Y, Hubbard J, Shaw J. 2009. Coseismic reverse- and oblique-slip surface faulting generated by the 2008 Mw 7.9 Wenchuan earthquake, China. Geology, 37: 515–518
Xu X W, Yeats R S, Yu G H. 2010. Five short historical earthquake surface ruptures near the Silk Road, Gansu Province, China. Bull Seismol Soc Am, 100: 541–561
Yan J Q, Jia S J. 1996. The principle and Methodology of Delination of potential seismic sources for moderate earthquakes in northeast and north China (in Chinese). Earthq Res China, 12: 173–194
Yuan D Y, Zhang P Z, Liu B C, Gan W J, Mao F Y, Wang Z C, Zheng W J, Guo H. 2004. Geometrical imagery and tectonic transformation of late Quaternary active tectonics in northeastern margin of Qinghai-Xizang Plateau (in Chinese). Acta Geol Sin, 78: 270–278
Zeng Z X, Fan G M. 2008. Structural Geology (in Chinese). Wuhan: China University of Geosciences Press. 62
Zhang P Z, Deng Q D, Zhang G M, Ma J, Gan W J, Min W, Mao F Y, Wang Q. 2003. Active tectonic blocks and strong earthquakes in the continent of China. Sci China Ser D-Earth Sci, 46(Suppl 2): 13–24
Zhang P Z, Deng Q D, Zhang Z Q, Li H B. 2013. Active faults, earthquake hazards and associated geodynamic processes in continental China (in Chinese). Sci China Earth Sci, 43: 1607–1620
Zhang P Z, Shen Z K, Wang M, Gan W J, Bürgmann R, Molnar P, Wang Q, Niu Z J, Sun JZ, Wu J C, Sun H R, You X Z. 2004. Continuous deformation of the Tibetan Plateau from global positioning system data. Geology, 32: 809
Zhang W Q, Jiao D C, Zhang P Z, Molnar P, Burchfiel B C, Deng Q D, Wang Y P, Song F M. 1987. Displacement along the Haiyuan fault associated with the great 1920 Haiyuan, China, earthquake. Bull Seismol Soc Am, 77: 117–131
Zheng W J, Zhang P Z, He W G, Yuan D Y, Shao Y X, Zheng D W, Ge W P, Min W. 2013a. Transformation of displacement between strikeslip and crustal shortening in the northern margin of the Tibetan Plateau: Evidence from decadal GPS measurements and late Quaternary slip rates on faults. Tectonophysics, 584: 267–280
Zheng W J, Zhang P Z, Ge W P, Molnar P, Zhang H P, Yuan D Y, Liu J H. 2013b. Late Quaternary slip rate of the South Heli Shan Fault (northern Hexi Corridor, NW China) and its implications for northeastward growth of the Tibetan Plateau. Tectonics, 32: 271–293
Zhou B G, Shen D X. 2006. Discussion on some geological problems in earthquake safety evaluation (in Chinese). Tech Earthq Disast Prevent, 1: 113–120
Acknowledgements
We thank the reviewers, who proposed helpful advice and comments for this manuscript. We are grateful for the relocation results of the earthquake sequence that were provided by Dr. Fang Lihua from Institute of Geophysics, China Earthquake Administration. This research was supported by a Special Project on Earthquake Research, the China Active Fault Survey Project—The South-North Seismic Zone Northern Segment (Grant No. 201408023), and Fundamental Research Funds in Institute of Crustal Dynamics, China Earthquake Administration (Grant No. ZDJ2015-16).
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Guo, P., Han, Z., An, Y. et al. Activity of the Lenglongling fault system and seismotectonics of the 2016 M S6.4 Menyuan earthquake. Sci. China Earth Sci. 60, 929–942 (2017). https://doi.org/10.1007/s11430-016-9007-2
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DOI: https://doi.org/10.1007/s11430-016-9007-2