Structural analysis and interpretation of the surface deformation associated with the Ning’er, Yunnan Province, China M S6.4 earthquake of June 3, 2007

详细信息    查看全文

• 作者：Xiao-ping Yang (1)
  Li-chun Chen (1)
  Wen-tao Ma (1)
  Hui Chen (3)
  Zhi Zhou (3)
  Yan-feng Li (2)
  Ying-qing Xie (3)
  Wei-hua Shi (3)
  Zu-feng Chang (3)
  
• 关键词：Ning’er earthquake ; surface deformation ; seismogenic fault ; dynamics ; P315.2
• 刊名：Earthquake Science
• 出版年：2008
• 出版时间：March 2008
• 年：2008
• 卷：21
• 期：2
• 页码：170-180
• 全文大小：777KB
• 参考文献：1. Bureau of Geology and Mineral Resources of Yunnan Province. 1990. / Regional Geology of Yunnan Province [M]. Beijing: Geological Publishing House: 1-78 (in Chinese with English abstract).
  2. DENG Qi-dong, RAN Yong-kang, YANG Xiao-ping, / et al. 2007. / Map of Active Tectonics in China (1:4000000) [M]. Beijing: Seismological Press (in Chinese).
  3. DENG Qi-dong, YU Gui-hua, YE Wen-hua. 1992. Relationship between earthquake magnitude and parameters of surface ruptures associated with historical earthquakes [C]//DENG Qi-dong eds. / Active Fault Research (2). Beijing: Seismological Press: 247-64 (in Chinese with English abstract).
  4. DENG Qi-dong, ZHANG Pei-zhen, RAN Yong-kang, / et al. 2002. Basic characteristic of China active tectonics [J]. / Science in China (Series D): 32(12): 1 020- 030 (in Chinese with English abstract).
  5. DING Guo-yu and LU Yan-chu. 1989. Recent movement of intraplate blocks [C]//MA Xing-yuan eds. / Lithospheric Dynamics Atlas of China [J]. Beijing: China Cartographic Publishing House: 21 (in Chinese).
  6. GUO Shun-min, JI Feng-ju, XIANG Hong-fa, / et al. 2001. Honghe active fault zone [M]. Beijing: Ocean Press: 86-01 (in Chinese with English abstract).
  7. GUO Shun-min, WANG Ying, JI Feng-ju. 1999. Tectonic mechanism of moderate-strong swarms in Yunnan’s Simao-Pu’er region [J]. / Journal of Seismological Research, 22(2): 105-14 (in Chinese with English abstract).
  8. LONG Hai-ying, NIE Xiao-hong, GAO Guo-ying. 2007. Comparative analysis of the focal mechanism solutions of the mid-strong earthquakes between Tianshan, Xinjiang area and Sichuan-Yunnan area [J]. / Journal of Seismological Research, 30(3): 229-34 (in Chinese with English abstract).
  9. MIAO Chong-gang, HU Yong-long, ZHOU Guang-quan, / et al. 2007. The emergency action and disaster characters of Ning’er / M6.4 earthquake in Yunnan [J]. / Recent Development in World Seismology, (6): 5-1 (in Chinese with English abstract).
  10. Minster J B and Jordan T. 1978. Present day plate motions [J]. / J Geophys Res, 83: 5 331- 354. CrossRef
  11. XU Xi-wei, WEN Xue-ze, ZHENG Rong-zheng / et al. 2003. Recent structure deformation mode and dynamical source of active blocks in Sichuan-Yunnan region [J]. / Science in China ( / Series D), 33(3): 281-88 (in Chinese with English abstract)
  12. XU Zhi-qin, HOU Li-wei, WANG Zhong-xiu. 1992. / Orogenic Process of Songpan-Ganzi Orogenic Zone, China [M]. Beijing: Geological Publishing House: 1-90 (in Chinese with English abstract).
  13. ZHANG Pei-zhen, GAN Wei-jun, SHEN Zheng-kang, / et al. 2005. A coupling model of rigid block movement and continuous deformation: Patterns of the present-day deformation of China’s Continent and its vicinity [J]. / Acta Geologica Sinica, 79(6): 748-56 (in Chinese with English abstract).
  14. ZHANG Pei-zhen, WANG Qi, MA Zong-jin. 2002. GPS velocity field and active crustal blocks of contemporary tectonic deformation in continental China [J]. / Earth Science Frontiers, 9(2): 430-41 (in Chinese with English abstract).
  15. ZHENG Si-hua and GAO Yuan. 2001. Research summarization of seismology for Qinghai-Xizang (Tibetan) Plateau [M]//MA Zong-jin, WANG Yi-peng, ZHANG Yan-ping ed. / Lithosphere Evolution and Dynamics of Qinghai-Xizang ( / Tibetan) / Plateau. Beijing: Seismological Press: 223-39 (in Chinese).
  16. Zhengkang Shen, Jiangning Lu, Min Wang, / et al. 2005. Contemporary crustal deformation around the southeast borderland of the Tibetan Plateau [J]. / J Geophys Res, 110: B11409, doi: 10.1029/2004JB003421. 4JB003421">CrossRef
  17. ZHONG Da-lai, WU Gen-yao, DING Lin. 1998. Cenozioc interior deformation characteristics of eastern Tibet region [M]//PAN Yu-sheng and KONG Xing-ru ed. / Lithosphere Strucyure, Evolution and Dynamics of Qinghai-Xizang ( / Tibetan) / Plateau. Guangzhou: Guangdong Science and Technology Press: 333-64 (in Chinese).
  18. ZHOU Jiu and HUANG Xiu-wu. 1980. The gravitational plastic flow of crustal materials in southwest China [J]. / Seismology and Geology, 2(4): 1-0 (in Chinese with English abstract).
  
• 作者单位：Xiao-ping Yang (1)
  Li-chun Chen (1)
  Wen-tao Ma (1)
  Hui Chen (3)
  Zhi Zhou (3)
  Yan-feng Li (2)
  Ying-qing Xie (3)
  Wei-hua Shi (3)
  Zu-feng Chang (3)
  
  1. Institute of Geology, China Earthquake Administration, Beijing, 100029, China
  3. Earthquake Administration of Yunnan Province, Kunming, 650041, China
  2. China Center for Earthquake Disaster Emergency and SAR, Beijing, 100049, China
  
• ISSN：1867-8777

文摘

The seismogenic fault and the dynamic mechanism of the Ning’er, Yunnan Province M S6.4 earthquake of June 3, 2007 are studied on the basis of the observation data of the surface fissures, sand blow and water eruption, landslide and collapse associated with the earthquake, incorporating with the data of geologic structures, focal mechanism solutions and aftershock distribution for the earthquake area. The observation of the surface fissures reveals that the Banhai segment of the NW-trending Ning’er fault is dominated by right-lateral strike-slip, while the NNE-trending fault is dominated by left-lateral strike-slip. The seismo-geologic hazards are concentrated mainly within a 330°-extending zone of 13.5 km in length and 4 km in width. The major axis of the isoseismal is also oriented in 330° direction, and the major axis of the seismic intensity VIII area is 13.5 km long. The focal mechanism solutions indicate that the NW-trending nodal plane of the Ning’er M S6.4 earthquake is dominated by right-lateral slip, while the NE-trending nodal plane is dominated by left-lateral slip. The preferred distribution orientation of the aftershocks of M S is 330°, and the focal depths are within the range of 32 km, predominantly within 30 km. The distribution of the aftershocks is consistent with the distribution zone of the seismo-geologic hazards. All the above-mentioned data indicate that the Banhai segment of the Ning’er fault is the seismogenic fault of this earthquake. Moreover, the driving force of the Ning’er earthquake is discussed in the light of the active block theory. It is believed that the northward pushing of the Indian plate has caused the eastward slipping of the Qinghai-Tibetan Plateau, which has been transformed into the southeastern-southernward squeezing of the southwest Yunnan region. As a result, the NW-trending faults in the vicinity of the Ning’er area are dominated by right-lateral strike-slip, while the NE-trending faults are dominated by left-lateral strike-slip. This tectonic framework might be the main cause of the frequent occurrence of M S6.0.9 earthquakes in the area.