Dynamic simulation of interactions between major earthquakes on the Xianshuihe fault zone

Wang, Hui; Liu, Jie; Zhang, Huai; Zhang, Guomin

doi:10.1007/s11430-008-0110-8

Cited by 22 publications

(11 citation statements)

References 32 publications

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“…The predicted slip rates of the main faults indicate that the earthquake occurrence periods for the main faults, from large to small, range from the Longmenshan Fault (Minjiang Fault and Huya Fault), to the East Kunlun Fault, and to the Xianshuihe Fault, assuming that the average coseismic slips on the faults are basically the same. The relative magnitudes of the occurrence periods of the main faults by our model are consistent with those from previous studies [ Lin et al , 2006; Wang et al , 2008; Shen et al , 2009]. …”

Section: Resultssupporting

confidence: 91%

“…We used a model with a dimension of 887 × 910 × 100 km 3 for this study. Assigned dip angles were 33° to the Longmenshan Fault [ Chen et al , 2008], 70° to the Minjiang and Huya Faults [ Jones et al , 1984; Kirby et al , 2000], and 90° to the Xianshuihe Fault [ Wang et al , 2008] and East Kunlun Fault [ Zhang et al , 2004; Lin et al , 2006]. The geometric features of the faults and the finite element mesh of the model are shown in Figure 3c.…”

Section: Effects Of Large Historical Earthquakes Viscous Relaxationmentioning

confidence: 99%

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Effects of large historical earthquakes, viscous relaxation, and tectonic loading on the 2008 Wenchuan earthquake

Cai

Wang

2012

J. Geophys. Res.

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The 2008 Wenchuan earthquake (M7.9) occurred on the Longmenshan Fault in Sichuan, China. Both the seismicity and slip rate of the fault are lower than those of other faults in the region. By incorporating large earthquakes in the region during the past 222 years into our investigation, the effects of historical earthquakes, viscous relaxation, and tectonic loading on the Wenchuan earthquake were studied, using a quasi‐static, finite element model. In this model, we first simulated an initial stress field constrained by fault slip rates obtained by GPS and geologic observations in the region. We then simulated earthquakes by fault softening. The results show that tectonic loading has the most significant effect on the Longmenshan Fault, whereas viscous relaxation of the lower crust and upper mantle has the least effect. The effects of the historical earthquakes are variable; some promote the earthquake potential and others retard the earthquake potential.

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Section: Resultssupporting

confidence: 91%

Section: Effects Of Large Historical Earthquakes Viscous Relaxationmentioning

confidence: 99%

Effects of large historical earthquakes, viscous relaxation, and tectonic loading on the 2008 Wenchuan earthquake

Cai

Wang

2012

J. Geophys. Res.

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“…In other words, the occurrence of major earthquakes along the xianshui He Fault zone influences the occurrence of subsequent earthquakes (Wang et al 2008).…”

Section: Structural Geology Of the Study Areamentioning

confidence: 99%

Structural Geological Characteristics of Karst Caves and Shilin Stone Forest of the Lunan County, Yunnan, China

Šebela

Hong

2014

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IzvlečekUDK 551.435.84:551.243(510) Stanka Šebela & Hong Liu: Strukturno geološke značilnosti kraških jam in glavnega kamnitega gozda, Kitajska Proučevali smo kraške terene v okrožju Shilin JV od Kumninga, da bi razumeli vlogo geoloških struktur pri oblikovanju kraških pojavov kot kamnitih gozdov in izbranih jam. Izvedli smo podrobno strukturno geološko kartiranje smeri razpok v izbranih kraških jamah ter v glavnem kamnitem gozdu, kar je predstavljeno z rozetami. Rezultate strukturnih geoloških elementov pridobljenih s terenskim kartiranjem smo primerjali z regionalnimi geološkimi strukturami. Obstaja dobra korelacija med površinskimi in podzemeljskimi smermi razpok ter med smerjo jamskih rovov in regionalno pomembnimi prelomnimi conami, to je s prelomom xiaojiang (smer S-J) in s prelomom Red River (smer SZ-JV). Najpogostejša smer jamskih rovov v generalni smeri S-J je povezana s kompresijo v smeri skoraj V-Z ter z ekstenzijo v generalni smeri S-J iz obdobja zgornjega Pliocena do srednjega Pleistocena. Druga tektonska faza iz zgornjega Pleistocena do danes, z napetostjo tektonskega polja predvsem s kompresijo v smeri SSZ-JJV in ekstenzijo v smeri SVV-JZZ je v skladu z najpogostejšo smerjo razpok v glavnem kamnitem gozdu v smeri S20-30°Z (11,4%). Ključne besede: strukturna geologija, rozete, kraške jame, glavni kamniti gozd, yunnan, Kitajska. Karst areas of Shilin County southeast of Kumning were studied to understand the role of geological structures in the formation of karst features as stone forest and selected caves. Detailed structural geological mapping of fissure orientations within selected caves and of the Major stone forest was accomplished and presented as rose diagrams. Regional geological structures were compared with statistical evaluation of structural geological elements obtained from field mapping. There is a good correlation between surface and underground fissure orientations and cave passage orientations with regionally important fault zones, including the xiaojiang Fault (N-S direction) and Red River Fault (NW-SE direction). The most frequent cave passages orientation, in a nearly N-S direction, is associated with nearly E-W compression and nearly N-S extension from late Pliocene to mid-Pleistocene. A second tectonic stage from latePleistocene to the present, with the tectonic stress field mainly of NNW-SSE compression and NEE-SWW extension, is in accordance with the most frequent fissure orientations in Major stone forest with a direction of N20-30°W (11.4%).

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“…As a result, it is important to study this influence. Nowadays, the common method to obtain this influence is from the Coulomb stress changes Wang et al, 2008a;Parsons, 2002). The influence on surrounding faults from the Wenchuan M S 8.0 earthquake is given by the Coulomb stress changes of Wenchuan earthquake, too (Parsons et al, 2008;Toda et al, 2008;Wan et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Influence of 2008 Wenchuan earthquake on earthquake occurrence trend of active faults in Sichuan-Yunnan region

et al. 2009

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The Wenchuan earthquake coseismic deformation field is inferred from the coseismic dislocation data based on a 3-D geometric model of the active faults in Sichuan-Yunnan region. Then the potential dislocation displacement is inverted from the deformation field in the 3-D geometric model. While the faults' slip velocities are inverted from GPS and leveling data, which can be used as the long-term slip vector. After the potential dislocation displacements are projected to long-term slip direction, we have got the influence of Wenchuan earthquake on active faults in Sichuan-Yunnan region. The results show that the northwestern segment of Longmenshan fault, the southern segments of Xianshuihe fault, Anninghe fault, Zemuhe fault, northern and southern segments of Daliangshan fault, Mabian fault got earthquake risks advanced of 305, 19, 12, 9.1 and 18, 51 years respectively in the eastern part of Sichuan and Yunnan. The Lijiang-Xiaojinhe fault, Nujiang fault, Longling-Lancang fault, Nantinghe fault and Zhongdian fault also got earthquake risks advanced in the western part of Sichuan-Yunnan region. Whereas the northwestern segment of Xianshuihe fault and Xiaojiang fault got earthquake risks reduced after the Wenchuan earthquake.

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Dynamic simulation of interactions between major earthquakes on the Xianshuihe fault zone

Cited by 22 publications

References 32 publications

Effects of large historical earthquakes, viscous relaxation, and tectonic loading on the 2008 Wenchuan earthquake

Effects of large historical earthquakes, viscous relaxation, and tectonic loading on the 2008 Wenchuan earthquake

Structural Geological Characteristics of Karst Caves and Shilin Stone Forest of the Lunan County, Yunnan, China

Influence of 2008 Wenchuan earthquake on earthquake occurrence trend of active faults in Sichuan-Yunnan region

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