香山-天景山断裂带西段的运动性质变化及其成因机制

doi:10.3969/j.issn.0253-4967.2016.03.018

摘要/Abstract

摘要：

香山-天景山断裂带作为青藏高原东北缘弧形构造带的重要组成部分，其东段整体表现为逆-左旋走滑运动性质。相反，其西段运动性质较为复杂，其上一系列的断错地貌特征以及在人工探槽和天然露头剖面上观察到的断裂运动性质，显示整个西段主要以正-左旋走滑运动为主，只在局部特定位置存在逆冲运动分量。为了确定香山-天景山断裂带西段运动性质变化的成因机制，从断裂的几何结构特征对其进行分析，得到影响与控制西段运动性质的3个主要因素：1）阶区构造，断层的左行左阶雁列式结构形成拉张型阶区，并控制着阶区附近及其内部断层的正-左旋走滑运动；2）尾端构造，在断裂端部存在阻止断层破裂传播的障碍体时，断裂一盘向前推挤的一端就会发生挤压构造变形，断层以逆-左旋走滑运动为主；3）双弯构造，次级段内部断层走向变化并呈右阶排列时，中间弯曲段在左旋走滑作用下形成局部挤压应力环境，表现为逆-左旋走滑运动。此外，天景山次级块体做SEE向运动，在其尾端形成走滑拉张构造环境，也是西段以正-左旋走滑运动为主的重要原因。香山-天景山断裂带西段的形成演化过程说明，在青藏高原东北缘弧形构造带向N扩展的过程中，整个香山-天景山断裂带可能并不是同时期形成的，而是分为运动性质显著不同的2个阶段，并表现为自东向西侧向扩展的形成演化模式。

关键词: 香山-天景山断裂带西段, 断错地貌特征, 运动性质, 成因机制

Abstract:

The Xiangshan-Tianjingshan fault zone is an important part of the arc tectonic zone in northeastern Tibet, whose eastern segment is characterized by primarily left-lateral slip along with thrust component. In contrast, the fault movement property on the western segment of the Xiangshan-Tianjingshan fault zone is more complicated. According to the offset geomorphic features and cross sections revealed by the trenches and outcrops, the western segment is mainly a left-lateral strike-slip fault with normal component, and only accompanied with reverse component at specific positions. To determine the genetic mechanism of fault movement property on the western segment, we obtained three main factors based on the integrated analysis of fault geometry:(1)Step-overs:the left-stepping parallel faults in a sinistral shear zone create extensional step-overs and control the nearby and internal fault movement property; (2)terminal structures:they are conductive to stop rupture propagation and produce compressive deformation at the end of the fault trace; and(3)double bends:strike-slip faults have trace that bends such that slip between two adjacent blocks creates a compressive stress and thrust fault. Additionally, the Tianjingshan sub-block moves to SEE and creates an extensional stress at the end of the sub-block associated with normal faults. It shows that the Xiangshan-Tianjingshan fault zone has a complex evolution history, which is divided into two distinctive periods and characterized by laterally westward propagating.

Key words: the western segment of the Xiangshan-Tianjingshan fault zone, offset geomorphic feature, fault movement property, genetic mechanism

中图分类号:

P315.2

李新男, 李传友, 张培震, 王旭光, 章龙胜. 香山-天景山断裂带西段的运动性质变化及其成因机制[J]. 地震地质, 2016, 38(3): 732-746.

LI Xin-nan, LI Chuan-you, ZHANG Pei-zhen, WANG Xu-guang, ZHANG Long-sheng. CHANGES IN FAULT MOVEMENT PROPERTY AND GENETIC MECHANISM ON THE WESTERN SEGMENT OF THE XIANGSHAN-TIANJINGSHAN FAULT ZONE[J]. SEISMOLOGY AND GEOLOGY, 2016, 38(3): 732-746.

参考文献

柴炽章, 焦德成, 廖玉华, 等. 2003. 宁、蒙、甘交界罐罐岭发现地震地表破裂带［J］. 地震地质, 25(1):167-171.
CHAI Chi-zhang, JIAO De-cheng, LIAO Yu-hua, et al. 2003. Discovery of surface rupture zone produced by Guanguanling earthquake at the juncture of Ningxia, Inner Mongolia and Gansu Province［J］. Seismology and Geology, 25(1):167-171(in Chinese).
柴炽章, 张维歧, 焦德成. 1997. 天景山断裂带晚第四纪水平活动强度的分时、分段研究［J］. 中国地震, 13(1):35-42.
CHAI Chi-zhang, ZHANG Wei-qi, JIAO De-cheng. 1997. Discussion of the horizontal intensity of late Quaternary fault activity along the Tianjingshan fault zone in different time intervals and fault segments［J］. Earthquake Research in China, 13(1):35-42(in Chinese).
陈国星, 田勤俭, 周本刚, 等. 2006. 黄河黑山峡大柳树坝址若干地震地质问题的研究［J］. 震灾防御技术, 1(3):186-198.
CHEN Guo-xing, TIAN Qin-jian, ZHOU Ben-gang, et al. 2006. Some seismo-geological questions regarding to Daliushu dam site in Heishanxia Valley of Yellow River［J］. Technology for Earthquake Disaster Prevention, 1(3):186-198(in Chinese).
邓起东, 张培震, 冉勇康, 等. 2002. 中国活动构造基本特征［J］. 中国科学(D辑), 32(12):1020-1030.
DENG Qi-dong, ZHANG Pei-zhen, RAN Yong-kang, et al. 2002. Basic characteristics of active tectonics of China［J］. Science in China(Ser D), 32(12):1020-1030(in Chinese).
邓起东, 张培震, 冉勇康, 等. 2003. 中国活动构造与地震活动［J］. 地学前缘, 10(特刊):66-73.
DENG Qi-dong, ZHANG Pei-zhen, RAN Yong-kang, et al. 2003. Active tectonics and earthquake activities in China［J］. Earth Science Frontiers, 10(Suppl):66-73(in Chinese).
邓起东, 张维歧, 张培震, 等. 1989. 海原走滑断裂带及其尾端挤压构造［J］. 地震地质, 11(1):1-14.
DENG Qi-dong, ZHANG Wei-qi, ZHANG Pei-zhen, et al. 1989. Haiyuan strike-slip fault zone and its compressional structures of the end［J］. Seismology and Geology, 11(1):1-14(in Chinese).
丁国瑜, 田勤俭, 孔凡臣, 等. 1993. 活断层的分段:原则、方法及运用［M］. 北京:地震出版社.
DING Guo-yu, TIAN Qin-jian, KONG Fan-chen, et al. 1993. Segmentation of Active Faults:Principles, Methods and Application［M］. Seismological Press, Beijing(in Chinese).
杜鹏, 柴炽章, 沈卫华, 等. 2007. 罐罐岭断裂带最新活动特征［J］. 地震地质, 29(3):597-606.
DU Peng, CHAI Chi-zhang, SHEN Wei-hua, et al. 2007. Characteristics of the Holocene activity of the Guanguanling fault zone［J］. Seismology and Geology, 29(3):597-606(in Chinese).
国家地震局地质研究所, 宁夏回族自治区地震局. 1990. 海原活动断裂带［M］. 北京:地震出版社. 147-149.
Institute of Geology, State Seismological Bureau, Seismological Bureau of Ningxia Hui Automous Region. 1990. The Active Haiyuan Fault Zone［M］. Seismological Press, Beijing. 147-149(in Chinese).
国家地震科学数据共享中心. 2003. 中国大陆强震孕育发生的深部构造环境研究［DB/OL］. http://data.cea-ies.ac.cn/CSEMP/default.aspx.
China Earthquake Data Center. 2003. Research on deep structural environment of strong earthquake taking place in continental China［DB/OL］. http://data.cea-ies.ac.cn/CSEMP/default.aspx.
李传友. 2005. 青藏高原东北部几条主要断裂带的定量研究［D］. 北京:中国地震局地质研究所. 117-192.
LI Chuan-you. 2005. Quantitative study on major active fault zones in northeastern Qinghai-Tibet Plateau［D］. Institute of Geology, China Earthquake Administration, Beijing. 117-192(in Chinese).
李天斌, 孟方, 王美芳, 等. 2005. 宁夏中西部香山-天景山地区逆冲推覆构造的特征及演化［J］. 地质通报, 24(4):310-315.
LI Tian-bin, MENG Fang, WANG Mei-fang, et al. 2005. Characteristic and evolution of thrust nappe structure in the Xiangshan-Tianjingshan area, central-western Ningxia［J］. Geological Bulletin of China, 24(4):310-315(in Chinese).
李新男. 2014. 香山-天景山断裂带西段晚第四纪运动学特征与古地震研究［D］.北京:中国地震局地质研究所. 12-17.
LI Xin-nan. 2014. Late Quaternary kinematic characteristics and paleoearthquakes along the western segment of the Xiangshan-Tianjingshan Fault［D］. Institute of Geology, China Earthquake Administration, Beijing. 12-17(in Chinese).
李新男, 李传友. 2015. 香山-天景山断裂带西段晚第四纪的特征滑动行为［J］. 地震地质, 37(2):1-44. doi:10.3969/j.issn.0253-4967.2015.02.
LI Xin-nan, LI Chuan-you. 2015. Characteristic slip behavior analysis of the western segment of Xiangshan-Tianjingshan Fualt zone since late Quaternary［J］. Seismology and Geology, 37(2):1-14(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. 194-197.
Working Group of M7.2012. Study on the Mid-to Long-term Potential of Large Earthquakes on the Chinese Continent［M］. Seismological Press, Beijing. 194-197(in Chinese).
闵伟, 邓起东. 1991. 香山-天景山断裂带的变形特征及走滑断裂端部挤压构造的形成机制［M］//国家地震局地质研究所编. 活动断裂研究(1). 北京:地震出版社. 71-78.
MIN Wei, DENG Qi-dong. 1991. The deformational characteristics of Xiangshan-Tianjingshan Fault and mechanism of compressional structures at the end of strike-slip fault［M］//Institute of Geology, State Seismological Bureau(ed). Research of Active Fault (1). Seismolgical Press, Beijing. 71-81(in Chinese).
闵伟, 张培震, 邓起东. 2001. 中卫-同心断裂带全新世古地震研究［J］. 地震地质, 23(3):357-366.
MIN Wei, ZHANG Pei-zhen, DENG Qi-dong. 2001. The study of Holocene paleoearthquakes on Zhongwei-Tongxin fault zone［J］. Seismology and Geology, 23(3):357-366(in Chinese).
宁夏回族自治区地矿局. 1990. 宁夏回族自治区区域地质志［M］. 北京:地质出版社.
Bureau of Geology and Mineral Resources of Ningxia Hui Autonomous Region. 1990. Regional Geology of Ningxia Hui Autonomous Region［M］. Geological Publishing House, Beijing(in Chinese).
田勤俭, 申旭辉, 韦开波, 等. 2001. 中卫-同心断裂带构造演化阶段初步研究［M］//卢演俦, 高维明, 陈国星, 等主编. 新构造与环境. 北京:地震出版社. 399-406.
TIAN Qin-jian, SHEN Xu-hui, WEI Kai-bo, et al. 2001. Preliminary study on tectonic stages of the Zhongwei-Tongxin fault zone［M］//LU Yan-chou et al.(eds). Neotectonics and Environmental Change. Seismological Press, Beijing. 399-406(in Chinese).
王阎昭. 2009. 大陆构造变形模型研究及其在青藏高原东缘的应用［D］. 北京:中国地震局地质研究所. 49-70.
WANG Yan-zhao. 2009. Continental deformation models and their application to eastern Tibetan plateau［D］. Institute of Geology, China Earthquake Administration, Beijing. 49-70(in Chinese).
汪一鹏, 宋方敏, 李志义, 等. 1990. 宁夏香山-天景山断裂带晚第四纪强震重复间隔的研究［J］. 中国地震, 6(2):15-24.
WANG Yi-peng, SONG Fang-min, LI Zhi-yi, et al. 1990. Study on recurrence intervals of great earthquakes in the Late Quaternary of Xiangshan-Tianjingshan fault zone in Ningxia［J］. Earthquake Research in China, 6(2):15-24(in Chinese).
尹功明, 江亚风, 俞岗, 等. 2013. 晚第四纪以来香山-天景山断裂左旋走滑量研究［J］. 地震地质, 35(3):472-479. doi:10.3969/j.issn.0253-4967.2013.03.002.
YIN Gong-ming, JIANG Ya-feng, YU Gang, et al. 2013. The study of the left-lateral displacement on the Xiangshan-Tianjingshan Fault in Late Quaternary［J］. Seismology and Geology, 35(3):472-479(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(1):12-20.
ZHANG Pei-zhen, DENG Qi-dong, ZHANG Guo-min, et al. 2003. Active tectonic blocks and strong earthquakes in continental China［J］. Science in China(Ser D), 33(1):12-20(in Chinese).
张维岐, 焦德成, 柴炽章, 等. 1988. 宁夏香山-天景山弧形断裂带新活动特征及1709年中卫南 7 1/2 级地震形变带［J］. 地震地质, 10(3):12-20.
ZHANG Wei-qi, JIAO De-cheng, CHAI Chi-zhang, et al. 1988. Neotectonic features of the Xiangshan-Tianjingshan arc fracture zone and the seismic deformation zone of 1709 south of Zhongwei M=7 1/2 earthquake［J］. Seismology and Geology, 10(3):12-20(in Chinese).
张维岐, 焦德成, 柴炽章, 等. 2015. 天景山活动断裂带［M］. 北京:地震出版社.
ZHANG Wei-qi, JIAO De-cheng, CHAI Chi-zhang, et al. 2015. The Active Tianjingshan Fault Zone［M］. Seismological Press, Beijing(in Chinese).
周俊喜, 刘百篪. 1987. 中卫-同心活断层研究［J］. 西北地震学报, 9(3):71-77.
ZHOU Jun-xi, LIU Bai-chi. 1987. The research of active Zhongwei-Tongxin Fault［J］. Northwestern Seismological Journal, 9(3):71-77(in Chinese).
Gan Wei-jun, Zhang Pei-zhen, Shen Zheng-kang, et al. 2007. Present-day crustal motion within the Tibetan plateau inferred from GPS measurements［J］. Journal of Geophysical Research, 112(B8). doi:10.1029/2005JB004120.
Gao Rui, Wang Hai-yan, Yin An, et al. 2013. Tectonic development of the northeastern Tibetan plateau as constrained by high-resolution deep seismic reflection data［J］. Lithosphere, 5(6):555-574. doi:10.1130/L293.1.
Lozos J C, Oglesby D D, Brune J N, et al. 2012. Small intermediate fault segments can either aid or hinder rupture propagation at stepovers［J］. Geophysical Research Lrtters, 39(18). doi:10.1029/2012GL053005.
Wang Wei-tao, Kirby Eric, Zhang Pei-zhen, et al. 2013. Tertiary basin evolution along the northeastern margin of the Tibetan plateau:Evidence for basin formation during Oligocene transtension［J］. Geological Society of America Bulletin, 125(3-4):377-400. doi:10.1130/B30611.1.
Wesnousky S G. 2006. Predicting the endpoints of earthquake ruptures［J］. Nature, 444(7117):358-360. doi:10.1038/nature05275.
Wesnousky S G. 2008. Dispalcement and geometical charactristics of earthquake surface ruptures:Issues and implications for seismic-hazard analysis and the process of earthquake rupture［J］. Bulletin of the Seismological Society of America, 98(4):1609-1632. doi:10.1785/0120070111.

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