PALEOSEISMIC BEHAVIOR OF THE ANNINGHE FAULT AND ITS COMPARISON WITH THE ZEMUHE FAULT IN WESTERN SICHUAN

doi:10.3969/j.issn.0253-4967.2014.03.013

Abstract

Abstract:

The Anninghe and Zemuhe Fault systems show characteristics of a left-lateral strike-slip movement since late Quaternary and they are located along the eastern boundary of the Sichuan-Yunnan Fault block in the southeastern region of the Tibetan plateau. The N-S striking Anninghe Fault is divided into the northern and southern segment around Mianning. The northern segment has an average recurrence interval of large earthquakes of about 500～700 years and a left-lateral slip rate of 4mm/a since Holocene. However paleoseismic behavior along the southern segment has been less focused. We excavated several trenches at Yuehua along the southern segment and used multiple radiocarbon dating to constrain the average recurrence interval of large earthquakes of this segment, which is about 600～800 years. The Zemuhe Fault has an average recurrence interval of paleoearthquakes of about 2300 years with a left-lateral slip rate of 2.4～3.6mm/a since Holocene. Comparing with the fault behavior between the Anninghe Fault and Zemuhe Fault, we find that the recurrence interval of the Anninghe Fault is shorter than that of the Zemuhe Fault and has a relatively larger left-lateral slip rate, indicating an inconsistent paleoseismic behavior. We suggest this inconsistence may be related to different strikes of the two faults, the uplift of the Luoji Shan and the distribution of the N-S trending strike-slip fault system on the south of the Anninghe Fault.

Key words: the Sichuan-Yunnan faulted block, the Anninghe Fault, the Zemuhe Fault, paleoseismology, Luojishan

摘要：

安宁河断层与则木河断层是青藏高原东南川滇地块东边界断裂带的重要组成部分，晚第四纪以来变形样式主要以左旋走滑运动为主。安宁河断层走向近SN向，以冕宁为界分为南北两段，北段古地震复发周期500～700a，全新世以来左旋平均位移速率约4mm/a。南段的古地震研究程度较低，通过在月华一带开挖探槽及大量¹⁴ C测年限定其大地震平均复发间隔为600～800a。则木河断层北接安宁河断层，全新世以来平均左旋位移速率为2.4～3.6mm/a，大地震复发周期约2 300a。对比安宁河断层与则木河断层的古地震行为，发现安宁河断层大地震复发间隔相对较短，平均左旋位移速率稍大，存在着古地震行为的不协调性。安宁河断层与则木河断层走向不一致、螺髻山的快速隆升以及安宁河断层南侧SN向展布的走滑断层系统等可能是造成安宁河-则木河断层古地震行为差异的原因。

关键词: 川滇地块, 安宁河断层, 则木河断层, 古地震, 螺髻山

CLC Number:

P315.2

WANG Hu, RAN Yong-kang, LI Yan-bao, CHEN Li-chun. PALEOSEISMIC BEHAVIOR OF THE ANNINGHE FAULT AND ITS COMPARISON WITH THE ZEMUHE FAULT IN WESTERN SICHUAN[J]. SEISMOLOGY AND GEOLOGY, 2014, 36(3): 706-717.

王虎, 冉勇康, 李彦宝, 陈立春. 川西地区安宁河断层古地震行为及其与则木河断层的比较[J]. 地震地质, 2014, 36(3): 706-717.

References

杜平山. 2000. 则木河断裂带的走滑位移及滑动速率
[J]. 四川地震, 1: 49-64.
DU Ping-shan. 2000. Slip displacement and its rate about Zemuhe Faults
[J]. Earthquake Research in Sichuan, 1: 49-64(in Chinese).
冯元保, 杜平山, 黄玉书. 2000. 1850年西昌地震地表破裂带
[J]. 四川地震, 1: 80-96.
FENG Yuan-bao, DU Ping-shan, HUANG Yu-shu. 2000. Earthquake rupture belt of 1850 Xichang M7.5 earthquake
[J]. Earthquake Research in Sichuan, 1: 80-96(in Chinese).
国家地震局震害防御司编. 1995. 中国历史强震目录
[Z]. 北京: 地震出版社.
Department of Earthquake Disaster Prevention, China Earthquake Administration. 1995. The Catalogue of Chinese Historical Strong Earthquakes
[M]. Seismological Press, Beijing(in Chinese).
黄圣睦, 董瑞英. 1996. 中国强震活动图像与地震预报
[Z]. 成都: 成都地图出版社.
HUANG Sheng-mu, DONG Rui-ying. 1996. Images of Chinese Strong Earthquakes and Earthquake Forecast
[Z]. Chengdu Cartographic Publishing House, Chengdu(in Chinese).
卢海峰, 王瑞, 赵俊香, 等. 2009. 元谋断裂晚第四纪活动特征及其构造应力分析
[J]. 第四纪研究, 29: 173-182.
LU Hai-feng, WANG Rui, ZHAO Jun-xiang, et al. 2009. Tectonic activities of the Yuanmou Fault in late Quaternary and analysis of its tectonic stress
[J]. Quaternary Sciences, 29: 173-182(in Chinese).
裴锡瑜, 王新民, 张成贵. 1997. 晚第四纪安宁河断裂分段的基本特征
[J]. 四川地震, 4: 52-61.
PEI Xi-yu, WANG Xin-min, ZHANG Cheng-gui. 1997. Basic character of segmentation of late Quaternary movement on the Anninghe Fault
[J]. Earthquake Research in Sichuan, 4: 52-61(in Chinese).
钱洪, 伍先国, 马声浩, 等. 1990. 安宁河断裂带北段的古地震事件及其在地震研究中的意义
[J]. 中国地震, 6(4): 43-49.
QIAN Hong, WU Xian-guo, MA Sheng-hao, et al. 1990. Prehistorical earthquakes on the north segment of the Anninghe Fault and their significance to seismological research
[J]. Earthquake Research in China, 6(4): 43-49(in Chinese).
冉勇康, 陈立春, 程建武, 等. 2008a. 安宁河断裂冕宁以北晚第四纪地表变形与强震破裂行为
[J]. 中国科学(D辑), 38(5): 543-554.
RAN Yong-kang, CHEN Li-chun, CHENG Jian-wu, et al. 2008a. Late Quaternary surface deformation and rupture behavior of strong earthquake on the segment north of Mianning of the Anninghe Fault
[J]. Science in China(Ser D), 51(9): 1224-1237(in Chinese).
冉勇康, 程建武, 宫会玲, 等. 2008b. 安宁河断裂紫马跨一带晚第四纪地貌变形与断层位移速率
[J]. 地震地质, 30(1): 86-98.
RAN Yong-kang, CHENG Jian-wu, GONG Hui-ling, et al. 2008b. Late Quaternary geomorphic deformation and slip rates of the Anninghe Fault around Zimakua
[J]. Seismology and Geology, 30(1): 8-98(in Chinese).
冉勇康, 王虎, 李彦宝, 等. 2012. 中国大陆古地震研究的关键技术与案例解析(1): 走滑活动断裂的探槽地点、布设与事件识别标志
[J]. 地震地质, 34(2): 197-210. doi: 10.3969/j.issn.0253-4967.2012.02.001.
RAN Yong-kang, WANG Hu, LI Yan-bao, et al. 2012. Key techniques and several cases analysis in paleoseismic studies in mainland China(1): Trenching sites, layouts and paleoseismic indications on active strike-slip faults
[J]. Seismology and Geology, 34(2): 197-210(in Chinese).
任金卫. 1994. 则木河断裂晚第四纪位移及滑动速率
[J]. 地震地质, 16(2): 146.
REN Jin-wei. 1994. Late Quaternary displacement and slip rate of Zemuhe Fault in Sichuan, China
[J]. Seismology and Geology, 16(2): 146(in Chinese).
任金卫, 李玶. 1993. 四川西昌1850年地震地表破裂特征研究
[J]. 地震地质, 15(2): 97-106.
REN Jin-wei, LI Ping. 1993. The characteristics of surface faulting of the 1850 earthquake in Xichang, Sichuan
[J]. Seismology and Geology, 15(2): 97-106(in Chinese).
田勤俭, 任志坤, 张军龙. 2008. 则木河断裂带大箐梁子附近古地震组合探槽研究
[J]. 地震地质, 30(2): 400-411.
TIAN Qin-jian, REN Zhi-kun, ZHANG Jun-long. 2008. Study of paleoearthquakes by combined trench on Zemuhe Fault around Daqingliangzi, Xichang, Sichuan
[J]. Seismology and Geology, 30(2): 400-411(in Chinese).
王虎, 冉勇康, 李彦宝. 2011. 小型拉分盆地的生长与走滑断层的位移速率: 以青藏高原东南缘则木河断裂带为例
[J]. 地震地质, 33(4): 818-827. doi: 10.3969/j.issn.0253-4967.2011.04.007.
WANG Hu, RAN Yong-kang, LI Yan-bao. 2011. Growth of a small pull-apart basin and slip rate of strike-slip fault: With the example of Zemuhe Fault on the southeastern margin of the Tibetan plateau
[J]. Seismology and Geology, 33(4): 818-827(in Chinese).
王虎, 冉勇康, 李彦宝, 等. 2013. 则木河断裂上古地震破裂与小型三角状拉分盆地演化
[J]. 中国科学(D辑), 43(7): 1106-1114.
WANG Hu, RAN Yong-kang, LI Yan-bao, et al. 2013. Paleoseismic ruptures and evolution of a small triangular pull-apart basin on the Zemuhe Fault
[J]. Science in China(Ser D), 56(3): 504-512.
王庆良, 崔笃信, 王文萍, 等. 2008. 川西地区现今垂直地壳运动研究
[J]. 中国科学(D辑), 38(5): 598-610.
WANG Qing-liang, CUI Du-xin, WANG Wen-ping, et al. 2008. Study of the modern crustal vertical movement in western Sichuan
[J]. Science in China(Ser D), 38(5): 598-610.
闻学泽, 杜平山, 龙德雄. 2000. 安宁河断裂带小相岭段古地震的新证据及最晚事件的年代
[J]. 地震地质, 22(1): 1-8.
WEN Xue-ze, DU Ping-shan, LONG De-xiong. 2000. New evidence of paleoearthquakes and date of the latest event on the Xiaoxiangling mountain segment of the Anninghe Fault zone
[J]. Seismology and Geology, 22(1): 1-8(in Chinese).
闻学泽, 马胜利, 雷兴林, 等. 2007. 安宁河-则木河断裂带过渡段及其附近新发现的历史大地震破裂遗迹
[J]. 地震地质, 29(4): 826-833.
WEN Xue-ze, MA Sheng-li, LEI Xing-lin, et al. 2007. Newly found surface rupture remains of large historical earthquakes on and near the transition segment of the Anninghe and Zemuhe Fault zones
[J]. Seismology and Geology, 29(4): 826-833(in Chinese).
徐锡伟, 闻学泽, 郑荣章, 等. 2003. 川滇地区活动块体最新构造变形样式及其动力来源
[J]. 中国科学(D辑), 33(4): 151-162.
XU Xi-wei, WEN Xue-ze, ZHENG Rong-zhang, et al. 2003. Pattern of latest tectonic motion and its dynamics for active blocks in Sichuan-Yunnan region, China
[J]. Science in China(Ser D), 33(4): 151-162.
俞维贤, 宋方敏, 闻学泽, 等. 2001. 1850年西昌地震地表破裂带的考察研究
[J]. 地震研究, 24(4): 346-350.
YU Wei-xian, SONG Fang-min, WEN Xue-ze, et al. 2001. Study of the surface rupture zone of Xichang earthquake in 1850
[J]. Journal of Seismological Research, 24(4): 346-350(in Chinese).
张培震, 邓起东, 张国民, 等. 2003. 中国大陆的强震活动与活动地块
[J]. 中国科学(D辑), 33(增刊): 12-20.
ZHANG Pei-zhen, DENG Qi-dong, ZHANG Guo-min, et al. 2003. Active tectonic blocks and strong earthquakes in the contienent of China
[J]. Science in China(Ser D), 33(suppl): 12-20.
Bronk-Ramsey C. 1998. Radiocarbon calibration and analysis of stratigraphy: The OxCal program
[J]. Radiocarbon, 37(2): 425-430.
He Hong-lin, Ren Jin-wei. 2003. Holocene earthquakes on the Zemuhe Fault in southwestern China
[J]. Annals of Geophysics, 46(5): 1035-1051.
He Hong-lin, Takashi Oguchi. 2008. Late Quaternary activity of the Zemuhe and Xiaojiang Faults in southwest China from geomorphological mapping
[J]. Geomorphology, 96(1-2): 62-85.
Liu-Zeng Jing, Klinger Y, Sieh K. et al. 2006. Serial ruptures of the San Andreas Fault, Carrizo Plain, California, revealed by three-dimensional excavations
[J]. Journal of Geophysical Research, 111(B2). doi: 10.1029/2004jb003601.
McCalpin J. 2009. Paleoseismology
[M]. Academic Press, New York.
Ren Zhi-kun, Lin Ai-ming, Rao Gang. 2010. Late Pleistocene-Holocene activity of the Zemuhe Fault on the southeastern margin of the Tibetan plateau
[J]. Tectonophysics, 495(3-4): 324-336.
Sieh K E. 1978. Pre-historic large earthquakes produced by slip on the San Andreas Fault at Pallett Creek, California
[J]. Journal of Geophysical Research, 83(B3): 3907-3939.
Wang Hu, RAN Yong-kang, Li Yan-bao, et al. 2013. Holocene palaeoseismologic record of earthquakes on the Zemuhe Fault on the southeastern margin of the Tibetan plateau
[J]. Geophysical Journal International, 193(1): 11-28.
Zhang Pei-zhen, Sheng Zheng-kang, Wang Min, et al. 2004. Continuous deformation of the Tibetan plateau from global positioning system data
[J]. Geology, 32(9): 809-812.

[1]	DONG Shao-peng, ZHANG Pei-zhen, ZHENG Wen-jun, YU Zhong-yuan, LEI Qi-yun, YANG Hui-li, LIU Jin-feng, GONG Hui-ling. PALEOSEISMOLOGICAL RESEARCH ON THE LANGSHAN RANGE-FRONT FAULT, HETAO AREA, CHINA: INSIGHTS FOR STUDIES ON TECTONICS AND SEISMIC RISK [J]. SEISMOLOGY AND GEOLOGY, 2018, 40(6): 1216-1239.
[2]	WANG Hu, RAN Yong-kang, CHEN Li-chun, LIANG Ming-jian, GAO Shuai-po, LI Yan-bao, XU Liang-xin. DETERMINATION OF SLIP RATE ON THE SOUTHERN SEGMENT OF THE ANNINGHE FAULT [J]. SEISMOLOGY AND GEOLOGY, 2018, 40(5): 967-979.
[3]	WANG Ming-ming, HE Yu-lin, LIU Shao, WANG Shi-yuan, MA Chao, ZHANG Wei, JIA Zhao-liang. LATE QUATERNARY ACTIVITY AND PALEOSEISMIC RUPTURE BEHAVIOR FOR THE SOUTHEAST SECTION OF THE GANZI-YUSHU FAULT [J]. SEISMOLOGY AND GEOLOGY, 2018, 40(4): 738-752.
[4]	XU Jian-hong, HUI Xu-hui, CHENG Hong-bin, ZHANG Xiao-liang, SHANG Si-qi. PALEOSEIMOLOGY AND LATE QUATERNARY SLIP RATE OF THE YOUSHASHAN FAULT AT SOUTHWESTERN MARGIN OF QAIDAM BASIN [J]. SEISMOLOGY AND GEOLOGY, 2018, 40(2): 465-479.
[5]	HE Wen-gui, ZHANG Bo, WU Ming, WANG Peng-tao, ZOU Xiao-bo, GAO Xiao-dong. PALEOSEISMOLOGY ON THE YEMAHE SEGMENT OF THE YEMAHE-DAXUESHAN FAULT REVEALED BY TRENCH STUDY [J]. SEISMOLOGY AND GEOLOGY, 2018, 40(1): 261-275.
[6]	WEI Lei-hua, HE Hong-lin, JIANG Han-chao, XU Yue-ren, WEI Zhan-yu, GAO Wei, ZOU Jun-jie. significance of high-resolution loess stratification based on grain size and magnetic susceptibility analysis to paleo-earthquake study: a case study of dongyugou loess section, at hongtong, shanxi province [J]. SEISMOLOGY AND GEOLOGY, 2015, 37(4): 1096-1114.
[7]	RAN Yong-kang, WANG Hu, YANG Hui-li, XU Liang-xin. KEY TECHNIQUES AND SEVERAL CASES ANALYSIS IN PALEOSEISMIC STUDIES IN MAINLAND CHINA(4) —SAMPLING AND EVENT ANALYSIS OF PALEOSEISMIC DATING METHODS [J]. SEISMOLOGY AND GEOLOGY, 2014, 36(4): 939-955.
[8]	HUANG Xiu-ming. THE METHOD OF LATENT DEVELOPMENT LEVEL OF EARTHQUAKE-PREGNANT STRUCTURES AND THE ANALYSIS OF RELEVANT SEISMOGEOLOGICAL INFORMATION [J]. SEISMOLOGY AND GEOLOGY, 2012, (3): 500-515.
[9]	WANG Hu, RAN Yong-kang, LI Yan-bao. GROWTH OF A SMALL PULL-APART BASIN AND SLIP RATE OF STRIKE-SLIP FAULT: WITH THE EXAMPLE OF ZEMUHE FAULT ON THE SOUTHEASTERN MARGIN OF THE TIBETAN PLATEAU [J]. SEISMOLOGY AND GEOLOGY, 2011, 33(4): 818-827.
[10]	HUANG Xiu-ming. PRELIMINARY RESEARCH ON PALAEOSEISMIC TRACES IN KARST CAVES [J]. SEISMOLOGY AND GEOLOGY, 2004, 26(2): 281-292.