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Discussion of rupture mechanisms on the seismogenic fault of the 2008 M s8.0 Wenchuan earthquake

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Abstract

The May 12, 2008, M s8.0 Wenchuan earthquake was the outcome of a recent movement of an active intra-continental thrust fault zone. The seismogenic fault of this earthquake underwent oblique-slip faulting along the central fault and pure thrust faulting along the range-front fault of the Longmenshan fault zone. The former had a steep dip and large vertical displacement, and the latter had a gentle dip and little vertical displacement. The fault zone consisted of compressive double fault ramps rupturing with right-lateral strike-slip components resulting from strain partitioning of a deep oblique slip fault in the brittle zone of the upper crust. The kinematic pattern and rupture mechanisms are complex for the seismogenic fault, as indicated by the geometric pattern of its surface ruptures, the coseismic displacement distribution and focal mechanisms of the main shock and aftershocks. As a tear fault, the NW-trending, left-lateral, strike-slip Xiaoyudong fault zone has accommodated NE-trending displacements with different shortening amounts. However, because of intense compression on the southwestern segment of the seismogenic fault, the left-lateral, strike-slip Xiaoyudong fault also carries a clear compression component. Normal faulting with a strike-slip component controls the formation of a fault-trough along the central fault, which is characterized by thrusting with a strike-slip component and strike-slip with thrusting. The fault-troughs are the product of the interaction of slip and gravity on the seismogenic fault under specific geological and geomorphic conditions. Gravitational force exaggerated the vertical component of fault displacement, which by no means represents the actual maximum vertical displacement of the seismogenic fault.

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References

  1. Tang R C, Han W B. Active Faults and Earthquakes in Sichuan. Beijing: Seismological Press, 1993

    Google Scholar 

  2. Deng Q D, Chen S F, Zhao X L. Tectonics, seismicity and dynamics of the Longmen Mountain and their adjacent regions. Seismol Geol, 1994, 16: 389–403

    Google Scholar 

  3. Chen S F, Deng Q D, Zhao X L, et al. Evolution history and deformation mechanism of the middle Longmenshan thrust nappes and related tectonics (2). Seismol Geol, 1994, 16: 413–421

    Google Scholar 

  4. King R W, Shen F, Burchfiel B C, et al. Geodetic measurement of crustal motion in southwest China. Geology, 1997, 25: 179–182

    Article  Google Scholar 

  5. Xu Z Q, Li H Q, Hou L W, et al. Uplift of the Longmen-Jinping orogenic belt along the eastern margin of the Qinghai-Tibet Plateau: Large-scale detachment faulting and extrusion mechanism. Geol Bull Chin, 2007, 26: 1262–1276

    Google Scholar 

  6. Li Y, Zhou R J, Densmore A L, et al. Geomorphic evidence for the late Cenozoic strike-slipping and thrusting in Longmen mountain at the eastern margin of the Tibetan Plateau. Quat Sci, 2006, 26: 40–51

    Google Scholar 

  7. Deng Q D, Zhang P Z, Ran Y K, et al. The basic characteristic of active tectonics of China. Sci China Ser D-Earth Sci, 2002, 45: 1020–1057

    Google Scholar 

  8. Zhao X L, Deng Q D, Chen S F. Tectonic geomorphology of the central segment of the Longmenshan thrust belt. Seismol Geol, 1994, 16: 422–428

    Google Scholar 

  9. Yang X P, Jiang P, Song F M, et al. The evidence of the south Longmenshan fault zones cutting late Quaternary stratum. Seismol Geol, 1999, 21: 341–345

    Google Scholar 

  10. Li C Y, Song F M, Ran Y K. Late Quaternary activity and age con straint of the northern Longmenshan fault zone. Seismol Geol, 2004, 26: 248–258

    Google Scholar 

  11. Ma B Q, Su G, Hou Z H, et al. Late Quaternary slip rate in the central part of the Longmenshan fault zone from terrace deformation along the Minjiang River. Seismol Geol, 2005, 27: 234–242

    Google Scholar 

  12. Li Y, Zhou R J, Densmore A L, et al. The Continental Dynamic Processes and Geological Response of the Eastern Margin of Tibetan Plateau. Beijing: Geological Publishing House, 2006

    Google Scholar 

  13. Zhou R J, Li Y, Densmore A L, et al. Active tectonics of the eastern margin of the Tibetan Plateau. J Mineral Petrol, 2006, (2): 40–51

  14. Chen G G, Ji F J, Zhou R J, et al. Primary research of activity segmentation of Longmenshan fault zone since late Quaternary. Seismol Geol, 2007, 29: 657–673

    Google Scholar 

  15. Densmore A L, Ellis M A, Li Y, et al. Active tectonics of the Beichuan and Pengguan faults at the eastern margin of the Tibetan Plateau. Tectonics, 2007, 26, doi: 10.1029/2006tc001987

  16. Chen L C, Chen J, Liu J F, et al. Investigation of late Quaternary activity along the northern Range-Front Fault, Longmen Mountain. Seismol Geol, 2008, 30: 710–722

    Google Scholar 

  17. Xu X W, Wen X Z, Ye J Q, et al. The M s8.0 Wenchuan earthquake surface ruptures and its seismogenic structure. Seismol Geol, 2008, 30: 597–629

    Google Scholar 

  18. He H L, Sun Z M, Wei Z Y, et al. Rupture of the M s8.0 Wenchuan earthquake along the Baishahe River. Seismol Geol, 2008, 30: 658–673

    Google Scholar 

  19. Li C Y, Wei Z Y. Deformation styles of the northernmost surface rupture zone of the M s8.0 Wenchuan earthquake. Seismol Geol, 2009, 31: 1–8

    Google Scholar 

  20. Chen G H, Xu X W, Zheng R Z, et al. Quantitative analysis of the deformation of surface rupture of the 2008 M s8.0 Wenchuan earthquake: The surface rupture zone along the Beichuan-Yingxiu fault. Seismol Geol, 2008, 30: 723–738

    Google Scholar 

  21. Li H B, Fu X F, Van Der Woerd J, et al. Co-seismic surface rupture and dextral-slip oblique thrusting of the M s8.0 Wenchuan earthquake. Acta Geol Sin, 2008, (12): 1623–1643

  22. Li Y, Zhou R J, Densmroe A K, et al. Surface rupture and deformation of the Yingxiu-Beichuan fault by the Wenchuan earthquake. Acta Geol Sin, 2008, (12): 1688–1706

  23. Liu J, Zhang Z H, Wen L, et al. The M s8.0 Wenchuan earthquake Co-seismic rupture and its tectonic implications—An out-of-sequence thrusting event with slip partitioned on multiple faults. Acta Geol Sin, 2008, 82: 1707–1722

    Google Scholar 

  24. Chen G H, Xu X W, Yu G H, et al. Co-seismic slip and slip partitioning of multi-faults during the M s8.0 2008 Wenchuan earthquake. Chin J Geophys, 2009, 52: 1384–1394

    Google Scholar 

  25. Zhu A L, Xu X W, Diao G L, et al. Relocation of the M s8.0 Wenchuan earthquake sequence in part: Preliminary seismotectonic analysis. Seismol Geol, 2008, 30: 759–767

    Google Scholar 

  26. Huang Y, Wu J P, Zhang T Z, et al. Study on relocation of the M s8.0 Wenchuan earthquake and its aftershocks. Sci China Ser D-Earth Sci, 2008, 51: 1242–1249

    Google Scholar 

  27. Chen J H, Liu Q Y, Li S C, et al. Seismotectonic study by relocation of the Wenchuan M s8.0 earthquake sequence. Chin J Geophys, 2009, 52: 390–397

    Google Scholar 

  28. Hu X P, Yu C Q, Tao K, et al. Focal mechanism solutions of Wenchuan earthquake and its strong aftershocks obtained from initial P wave polarity analysis. Chin J Geophys, 2008, 51: 1711–1718

    Google Scholar 

  29. Wang Q C, Chen Z L, Zheng S H. Spatial segmentation characteristic of focal mechanism of aftershock sequence of Wenchuan Earthquake. Chin Sci Bull, 2009, 54: 2348–2354

    Google Scholar 

  30. Zheng Y, Ma H S, Lu J, et al. Source mechanism of strong aftershocks (M s≥5.6) of the 2008/05/12 Wenchuan earthquake and the implication for seismotectonics. Sci China Ser D-Earth Sci, 2009, 39: 413–426

    Google Scholar 

  31. Chen Y T, Xu L S, Zhang Y, et al. Analysis of the source parameters of the great Wenchuan earthquake of May 12, 2008. 2008, http://www.csi.ac.cn/sichuan/Chenyuntai.pdf

  32. Zhang Y, Xu L S, Chen Y T, et al. Spatiotemporal rupture process of the 2008 great Wenchuan earthquake. Sci China Ser D-Earth Sci, 2009, 52: 145–154

    Article  Google Scholar 

  33. Wang W M, Zhao L F, Li J, et al. Rupture process of the M8.0 Wenchuan earthquake of Sichuan, China. Chin J Geophys, 2008, (5): 1403–1410

  34. Shen Z K, Sun J, Zhang P, et al. Slip maxima at fault junctions and rupturing of barriers during the 2008 Wenchuan earthquake. Nat Geosci, 2009, 2: 718–724

    Article  Google Scholar 

  35. Jia D, Li Y, Lin A, et al. Structural model of 2008 M w7.9 Wenchuan earthquake in the rejuvenated Longmen Shan thrust belt, China. Tectonophysics, 2010, 41: 174–184

    Article  Google Scholar 

  36. Xu X, Wen X, Yu G, et al. Coseismic reverse- and oblique-slip surface faulting generated by the 2008 M w7.9 Wenchuan earthquake, China. Geology, 2009, 37: 515–518

    Article  Google Scholar 

  37. Hubbard J, Shaw J H. Uplift of the Longmen Shan and Tibetan Plateau, and the 2008 Wenchuan (M w7.9) earthquake. Nature, 2009, 458: 194–197

    Article  Google Scholar 

  38. Zhang P Z, Wen X Z, Xu X W, et al. Tectonic model of the great Wenchuan earthquake of May 12, 2008, Sichuan, China. Chin Sci Bull, 2009, 54: 944–953

    Google Scholar 

  39. Yuan R M, Tan X B, Chen G H, et al. Large-scale landslide in special locations of earthquake rupture zone and explanation of its genetic mechanism based on tectono-geomorphological model: A case study of the Donghekou ejection landslide. Earth Sci Front, 2010, 17: 243–253

    Google Scholar 

  40. Ran Y K, Chen L C, Chen G H, et al. Primary analyses of in-situ recurrence of large earthquake along seismogenic fault of the M s8.0 Wenchuan earthquake. Seismol Geol, 2008, 30: 630–643

    Google Scholar 

  41. Zheng% W J, Li C Y, Wang W T, et al. Trench logs of earthquake scarp of the M s8.0 Wenchuan earthquake in the segment north of Beichuan. Seismol Geol, 2008, 30: 697–709

    Google Scholar 

  42. Bowman D, King G, Tapponnier P. Slip partitioning by elastoplastic propagation of oblique slip at depth. Science, 2003, 300: 1121–1123

    Article  Google Scholar 

  43. Lettis W R, Hanson K L. Crustal strain partitioning: implications for seismic-hazard assessment in western California. Geology, 1991, 19: 559–562

    Article  Google Scholar 

  44. Xu Z H, Yan M, Zhao Z H. The orientation of the tectonic stress field of North China deduced from many small earthquakes. Acta Seismol Sin, 1983, 5: 268–279

    Google Scholar 

  45. Ma Z J, Deng Q D. Discrimination of mechanical properties of joint and preliminary study of stage division and mating of joints. In: Some Problems in the Study of Structural Geology. Beijing: Science Press, 1965. 15–30

    Google Scholar 

  46. Deng Q D, Zhong J Y, Ma Z J. Characteristics of the shearing rupture zone and condition of its formation. Chin J Geol, 1966, (3): 227–237

    Google Scholar 

  47. Deng Q, Zhang P. Research on the geometry of shear fracture zones. J Geophys Res, 1984, 89: 5699–5710

    Article  Google Scholar 

  48. Mandl G, Shippam G K. Mechanical model of thrust sliding and imbrication. In: McClay K R, Price N J, eds. Thrust and Nappe Tectonics. London: Geological Society Special Publication, 1981. 79–97

    Google Scholar 

  49. Zhang C P. A discussion on the Xiaoyudong surface rupture zone by the Wenchuan earthquake and the surface deformation structures in the Beichuan region. Recent Develop World Seismol, 2010, (6): 9

    Google Scholar 

  50. Li H B, Si J L, Fu X F, et al. Co-seismic rupture and maximum displacement of the 2008 Wenchuan earthquake and its tectonic implications. Quat Sci, 2009, 29: 387–402

    Google Scholar 

  51. Ran Y K, Shi X, Wang H, et al. The maximum surface coseismic vertical displacement and surfacedeformation stiles of the M s8.0 Wenchuan earthquake. Chin Sci Bull, 2010, 55: 154–162

    Article  Google Scholar 

  52. Xu X, Yu G, Chen G, et al. Parameters of coseismic reverse- and oblique-slip surface ruptures of the 2008 Wenchuan earthquake, Eastern Tibetan Plateau. Acta Geol Sin, 2009, 83: 673–684

    Article  Google Scholar 

  53. Xu X W, Chen G H, Yu G H, et al. Reevaluation of surface rupture parameters of the 5·12 Wenchuan earthquake and its tectonic implication for Tibetan uplift. Chin J Geophys, 2010, 553: 2321–2336

    Google Scholar 

  54. Yu G H, Xu X W, Chen G H, et al. Relationship between the localization of earthquake surface ruptures and building damages associated with the Wenchuan 8.0 earthquake. Chin J Geophys, 2009, 52: 3027–3041

    Google Scholar 

  55. An Y F, Han Z J, Dong S P, et al. Features and tectonic implications of the northeasternmost surface rupture of Wenchuan M s8.0 earthquake on the central fault of Longmenshan fault zone. Seismol Geol, 2010, 32: 1–15

    Google Scholar 

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Authors and Affiliations

  1. National Center for Active Fault Studies, Institute of Geology, China Earthquake Administration, Beijing, 100029, China

    QiDong Deng & GuiHua Chen

  2. Earthquake Administration of Shanghai Municipality, Shanghai, 200062, China

    AiLan Zhu

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  1. QiDong Deng
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  2. GuiHua Chen
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Deng, Q., Chen, G. & Zhu, A. Discussion of rupture mechanisms on the seismogenic fault of the 2008 M s8.0 Wenchuan earthquake. Sci. China Earth Sci. 54, 1360–1377 (2011). https://doi.org/10.1007/s11430-011-4230-1

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