THE DISCUSSION FOR THE NEW ACTIVITY OF THE TIANQUAN SEGMENT OF LONGMENSHAN FAULT ZONE AND ITS RELATIONSHIP TO THE 1327 TIANQUAN EARTHQUAKE, SICHUAN

doi:10.3969/j.issn.0253-4967.2016.03.004

Abstract

Abstract:

The 2008 Wenchuan earthquake occurred along the Longmen Shan fault zone, only five years later, another M7 Lushan earthquake struck the southern segment where its seismic risk has been highly focused by multiple geoscientists since this event. Through geological investigations and paleoseismic trenching, we suggest that the segment along the Shuangshi-Dachuan Fault at south of the seismogenic structure of the Lushan earthquake is active during Holocene. Along the fault, some discontinuous fault trough valleys developed and the fault dislocated the late Quaternary strata as the trench exposed. Based on analysis of historical records of earthquakes, we suggest that the epicenter of the 1327 Tianquan earthquake should be located near Tianquan and associated with the Shuangshi-Dachuan Fault. Furthermore, we compared the ranges of felt earthquakes(the 2013 M7 Lushan earthquake and the 1970 M_S6.2 Dayi earthquake)and suggest that the magnitude of the 1327 Tianquan earthquake is more possible between 6½ and 7. The southern segment of the Longmen Shan fault zone behaves as a thrust fault system consisting of several sub-paralleled faults and its deep structure shows multiple layers of decollement, which might disperse strain accumulation effectively and make the thrust system propagate forward into the foreland basin, creating a new decollement on a gypsum-salt bed. The soft bed is thick and does not facilitate to constrain fault deformation and accumulate strain, which produces a weak surface tectonic expression and seismic activity along the southern segment, this is quite different from that of the middle and northern segments of the Longmen Shan fault zone.

Key words: the 1327 Tianquan earthquake, historical earthquake, the southern segment of the Longmen Shan fault zone, the seismogenic structure, Shuangshi-Dachuan Fault

摘要：

2008年汶川8.0级地震之后，仅过5a时间，2013年在汶川以南的芦山发生了7.0级地震，龙门山断裂带南段的地震危险性成为关注的热点。通过地震地质调查和古地震研究，发现龙门山断裂带南段——双石-大川断裂（芦山地震震区以南段）在全新世有过新活动，主要表现为断续展布的槽谷地貌，探槽揭露断层断错了晚第四纪地层。综合历史地震史料分析认为，1327年天全地震震中应在四川天全一带，与双石-大川断裂新活动有密切关系；通过对比分析，认为其震级可定为6½~7级。

关键词: 1327年天全地震, 历史地震, 龙门山断裂带南段, 发震构造, 双石-大川断裂

CLC Number:

P315.2

LIANG Ming-jian, CHEN Li-chun, RAN Yong-kang, WANG Hu, LI Dong-yu. THE DISCUSSION FOR THE NEW ACTIVITY OF THE TIANQUAN SEGMENT OF LONGMENSHAN FAULT ZONE AND ITS RELATIONSHIP TO THE 1327 TIANQUAN EARTHQUAKE, SICHUAN[J]. SEISMOLOGY AND GEOLOGY, 2016, 38(3): 546-559.

梁明剑, 陈立春, 冉勇康, 王虎, 李东雨. 龙门山断裂南段天全段的新活动特征与1327年天全地震的关系[J]. 地震地质, 2016, 38(3): 546-559.

References

陈立春, 冉勇康, 王虎, 等. 2013. 芦山地震与龙门山断裂带南段活动性研究［J］. 科学通报, 58:1925-1932. doi:10.1007/s11434-013-6009-6.
CHEN Li-chun, RAN Yong-kang, WANG Hu, et al. 2013. The Lushan M_S7.0 earthquake and activity of the southern segment of the Longmenshan fault zone［J］. Chin Sci Bull, 58:1925-1932(in Chinese).
邓起东, 高翔, 陈桂华, 等. 2010. 青藏高原昆仑-汶川地震系列与巴颜喀喇断块的最新活动［J］. 地学前缘, 17(5):163-178.
DENG Qi-dong, GAO Xiang, CHEN Gui-hua, et al. 2010. Recent tectonic activity of Bayankala fault-block and the Kunlun-Wenchuan earthquake series of the Tibetan plaateau［J］.Earth Science Frontiers,17(5):163-178(in Chinese).
董绍鹏, 韩竹军, 尹金辉, 等. 2008. 龙门山山前大邑断裂活动时代与最新构造变形样式初步研究［J］. 地震地质, 30(4):996-1003.
DONG Shao-peng, HAN Zhu-jun, YIN Jin-hui, et al. 2008. A preliminary reseach on the latest tectonic deformation style and the activity age of the Dayi Fault in the piedmont of the Longmen Mountains［J］. Seismology and Geology, 30(4):996-1003(in Chinese).
顾功叙主编. 1983. 中国地震目录(公元前1831年-公元1969年)［M］. 北京:科学出版社. 20.
GU Gong-xun(ed). 1983. The Catalogue of Chinese Earthquake(from 1831 BC to 1969 AD)［M］. China Science and Technology Press, Beijing. 20(in Chinese).
国家地震局地球物理研究所, 复旦大学中国历史地理研究所. 1990. 中国历史地震图集(远古至元时期)［CML］. 北京:中国地图出版社. 162.
Institute of Geophysics, State Seismological Bureau and Institute of Chinese Historical Geography, Fudan University. 1990. Atlas of the Historical Earthquakes in China(The Period from Remote Antiquity to the Yuan Dynasty)［CML］. China Cartographic Publishing House, Beijing.162(in Chinese).
国家地震局震害防御司编. 1995. 中国历史强震目录(公元前23世纪-公元1911年)［Z］. 北京:地震出版社. 39.
The Department of Earthquake Disaster Mitigation, State Seismological Bureau. 1995. Catalogue of Chinese Historical Strong Earthquakes(from 23rd Century B.C. to 1911 A.D. M_S≥4.7)［Z］. China Science and Technology Press, Beijing. 39(in Chinese).
李勇, Allen P A, 周荣军, 等. 2006. 青藏高原东缘中新生代龙门山前陆盆地动力学及其与大陆碰撞作用耦合关系［J］. 地质学报, 80(8):1101-1109.
LI Yong, Allen P A, ZHOU Rong-jun, et al. 2006. Mesozoic-Cenozoic dynamics of Longmenshan foreland basin along the eastern margin of the Tibetan plateau and its coupled relationship with continent collision［J］. Acta Geologica Sinica, 80(8):1101-1109(in Chinese).
李智武, 刘树根, 林杰, 等. 2009. 川西坳陷构造格局及其成因机制［J］. 成都理工大学学报(自然科学版), 36(6):645-653.
LI Zhi-wu, LIU Shu-gen, LIN Jie, et al. 2009. Structural configuration and its genetic mechanism of the West Sichuan depression in China［J］. Journal of Chengdu University of Technology(Science & Technology Edition), 36(6):645-653(in Chinese).
梁明剑, 郭红梅, 李大虎, 等. 2013. 2013年四川芦山7.0级地震发震构造机理及青衣江上游流域地貌的响应［J］. 地学前缘, 6:21-28.
LIANG Ming-jian, GUO Hong-mei, LI Da-hu et al. 2013. The seismogenic structure mechanism of the Lushan M7.0 earthquake and the response of the upstream drainages of Qingyijiang River［J］. Earth Science Frontiers, 6:21-28(in Chinese).
M7专项工作组. 2012. 中国大陆大地震中-长期危险性研究［M］. 北京:地震出版社. 30-31.
Working Group of M7. 2012. Study on the Mid- to Long-term Potential of Large Earthquakes on the Chinese Continent［M］. Seismological Press, Beijing. 30-31(in Chinese).
四川地震资料汇编领导小组. 1980. 四川地震资料汇编(第一卷)［M］. 成都:四川人民出版社. 66-68.
Editor Group of the Data Compilation of Earthquakes in Sichuan. 1980. The Data Compilation of Earthquakes in Sichuan(Vol.1)［M］. People's Publishing House of Sichuan, Chengdu. 66-68(in Chinese).
孙成民主编. 2010. 四川地震全记录(公元前26年-公元1949年9月)［M］. 成都:四川出版集团四川人民出版社. 13-15.
SUN Cheng-min(ed). 2010. 2010. A Compilation of Sichuan Historical Earthquake Records(from 26 B.C. to Sept. 1949 A.D.)［M］. Sichuan People's Publitshing house, Chengdu. 13-15(in Chinese).
陶晓风. 1995. 龙门山双石推覆构造的形成机制探讨［J］. 成都理工学院学报, 22(2):27-30.
TAO Xiao-feng. 1995. A discussion on the formation-mechanism of the Shuangshi nappe structure in Longmen Mountains, Sichuan［J］. Journal of Chengdu University of Technology, 22(2):27-30(in Chinese).
吴吉远. 1998. 在论鱼通高杨二姓的来历:兼论鱼通土司与天全高杨土司在历史上的关系［J］. 西南民族学院学报(哲学社会科学版), 19(4):49-52.
WU Ji-yuan. 1998. The discussion of the historical relationships between Chieftain Gao and Yang, and their surname's origins, Yutong area, Tianquan, in Yuan Dynasty［J］. Journal of Southwest Institute for Ethnic Groups(Philosophy and Social Sciences), 19(4):49-52(in Chinese).
徐锡伟, 闻学泽, 韩竹军, 等. 2013. 四川芦山7.0级强震:一次典型的盲逆断层型地震［J］. 科学通报, 58(20):1887-1893.
XU Xi-wei, WEN Xue-ze, HAN Zhu-jun, et al. 2013. Lushan M_S7.0 earthquake:A blind reserve-fault earthquake［J］. Chin Sci Bull, 58(20):1887-1893(in Chinese).
许冲, 徐锡伟, 郑文俊, 等. 2013. 2013年四川省芦山 "4.20"7.0级强烈地震触发滑坡［J］. 地震地质, 35(3):641-660. doi:10.3969/j.issn.0253-4967.2013.03.018.
XU Chong, XU Xi-wei, ZHENG Wen-jun, et al. 2013. Landslides triggered by the April 20, 2013 Lushan, Sichuan Province M_S7.0 strong earthquake of China［J］. Seismology and Geology, 35(3):641-660(in Chinese).
许嘉璐主编. 2004a. 二十四史全译:元史·泰定帝纪(第一册)卷三○［M］. 上海:汉语大词典出版社. 568.
XU Jia-lu(ed). 2004a. The Complete Translations of the Twenty-Four Histories:History of the Yuan Dynasty-the Record of Taiding Emperor(Book 1), Vol.30［M］. Grand Chinese Dictionary Press, Shanghai. 568(in Chinese).
许嘉璐主编, 2004b. 二十四史全译:元史·五行纪(第二册)卷五○［M］. 北京:汉语大词典出版社. 905.
XU Jia-lu(ed). 2004b. The Complete Translations of the Twenty-Four Histories:"History of the Yuan Dynasty-the Article of Five Elements"(Book 1), Vol.50［M］. The Grand Chinese Dictionary Press, Shanghai. 905(in Chinese).
杨晓平, 蒋溥, 宋方敏, 等. 1999. 龙门山断裂带南段断错晚更新世以来地层的证据［J］. 地震地质, 21(4):341-345.
YANG Xiao-ping, JIANG Pu, SONG Fang-min, et al. 1999. The evidence of the south Longmenshan fault zones cutting late Quaternary stratum［J］. Seismology and Geology, 21(4):341-345(in Chinese).
易桂喜, 闻学泽, 辛华, 等. 2013. 龙门山断裂带南段应力状态与强震危险性研究［J］. 地球物理学报, 56(4):1112-1120.
YI Gui-xi, WEN Xue-ze, XIN Hua, et al. 2013. Stress state and major-earthquake risk on the southern segment of the Longmen Shan fault zone［J］. Chinese Journal of Geophysics, 56(4):1112-1120(in Chinese).
中国地震局震害防御司编. 1999. 中国近代地震目录(公元1912-1990年, M_S≥4.7)［Z］. 北京:中国科学技术出版社. 227-228.
Department of Earthquake Disaster Prevention, China Earthquake Administration. 1999. Catalogue of Chinese Earthquakes(1912-1990, M_S≥4.7)［Z］. Science and Technology of China Press, Beijing. 227-228(in Chinese).
Burchfiel G P, Royden L H, Hilst R D, et al. 2008. A geological and geophysical context for the Wenchuan earthquake of 12 May 2008, People's Republic of China［J］. GSA, 18:4-11.
Chen L C, Ran Y K, Wang H, et al. 2013. Paleoseismology and kinematic characteristics of the Xiaoyudong rupture, a short but significant strange segment characterized by the May 12, 2008, M_W7.9 earthquake in Sichuan, China［J］. Tectonophysics, 584:91-101.
Densmore A L, Ellis M A, Li Y, et al. 2007. Active tectonics of the Beichuan and Pengguan faults at the eastern margin of the Tibetan plateau［J］. Tectonics, 26, TC4005. doi:10.1029/2006TC001987.
Jia Q P, Jia D, Luo L, et al. 2009. Three-dimensional evolutionary models of the Qiongxi structures, southwestern Sichuan Basin, China:Evidence from seismic interpretation and geomorphology［J］. Acta Geologica Sinica, 83(2):372-385.
Liu M, Luo G, Wang H. 2014. The 2013 Lushan earthquake in China tests hazards assessment［J］. Seismological Research Letters, 85:40-43. doi:10.1785/0220130117.
Parsons T, Ji C, Kirby E. 2008. Stress changes from the 2008 Wenchuan earthquake and increased hazard in the Sichuan Basin［J］. Nature, 454:509-510. doi:10.1038/nature07177.
Ran Y K, Chen W S, Xu X W, et al. 2013. Paleoseismic events and recurrence interval along the Beichuan-Yingxiu Fault of Longmenshan fault zone, Yingxiu, Sichuan, China［J］. Tectonophysics, 584:81-90. doi:10.1016/j.tecto.2012.07.013.
Wang H, Chen L C, Ran Y K, et al. 2014. Paleoseismic investigation of the seismic gap between the seismogenic structures of the 2008 Wenchuan and 2013 Lushan earthquakes along the Longmen Shan fault zone at the eastern margin of the Tibentan Plateau［J］. Lithosphere, 1-7. doi:10.1130/L373.1.
Wang H, Liu M, Shen X H, et al. 2009. Balance of seismic moment in the Songpan-￣Ganze region. eastern Tibet:Implications for the 2008 Great Wenchuan earthquake［J］. Tectonophysiscs, 491:154-164. doi:10.1016/j.tecto.2009.09.22.
Wang M M, Jia D, Shaw J H, et al. 2013. Active fault-related folding beneath an alluvial terrace in the southern Longmen Shan range front, Sichuan Basin, China:Implications for seismic hazard［J］. Bull Seismol Soc Am, 103, (4):2369-2385. doi:10.1785/0120120188.
Wang M, Jia D, John H S, et al. 2014. The 2013 Lushan earthquake:Implications for seismic hazards posed by the Range Front blind thrust in the Sichuan Basin, China［J］. Geology, 42:(10)915-918.
Wen X Z, Ma S L, Xu X W, et al. 2008. Historical pattern and behavior of earthquake ruptures along the eastern boundary of the Sichuan-Yunnan faulted-block, southwestern China［J］.Physics of the Earth and Planetary Interiors, 16-36. doi:10.1016/j.pepo.2008.04.013.

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