2014年新疆于田7.3级地震发震构造和震前地震活动过程讨论

doi:10.3969/j.issn.0253-4967.2015.03.009

地震地质 ›› 2015, Vol. 37 ›› Issue (3): 780-791.DOI: 10.3969/j.issn.0253-4967.2015.03.009

2014年新疆于田7.3级地震发震构造和震前地震活动过程讨论

宋春燕^1,2, 马瑾¹, 冉慧敏², 黄辅琼³

1 中国地震局地质研究所, 地震动力学国家重点实验室, 北京 100029;
2 新疆维吾尔自治区地震局, 乌鲁木齐 830011;
3 中国地震台网中心, 北京 100045

收稿日期:2014-07-28 修回日期:2015-07-30 出版日期:2015-09-20 发布日期:2015-10-20
作者简介:宋春燕,女,1978年生,2008年于新疆大学数学与系统科学学院获硕士学位,现为中国地震局地质研究所博士研究生,工程师,主要从事数字地震学和地震预测等方面的工作,E-mail:songchunyan1@163.com.
基金资助:
国家自然科学基金(41172180)和地震动力学国家重点实验室开放课题(LED2014B01)共同资助

DISCUSSION ON SEISMOGENIC STRUCTURES AND SEISMIC ACTIVITY PROCESS BEFORE THE YUTIAN M_S7.3 EARTHQUAKE ON FEBRUARY 12, 2014, XINJIANG

SONG Chun-yan^1,2, MA Jin¹, RAN Hui-min², HUANG Fu-qiong³

1 State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
2 Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China;
3 China Earthquake Networks Center, Beijing 100045, China

Received:2014-07-28 Revised:2015-07-30 Online:2015-09-20 Published:2015-10-20

摘要/Abstract

摘要：

2014年2月12日在新疆于田发生7.3级地震, 震中位于阿尔金断裂西段, 这是继2008年3月21日于田7.3级地震后在塔里木盆地南侧发生的第2次7级地震.这次于田7.3级地震的余震主体沿NE向分布, 余震区的西南段呈近SN向分布; 绝大部分余震与前震在余震区西南密集分布, 强余震(全部的5级以上地震和81%的4级地震)绝大多数都分布在这个区域, 第1天的余震主要在这个区域呈近SN向分布, 余震由西向东扩展.在这次于田地震的近SN方向上曾在1982、2011以及2012年先后发生过几次6级左右的地震, 而这次地震填补了其中的空段.文中从区域构造环境、地震震源机制解和余震分布特征等方面, 分析这次地震的发震过程, 认为地震发生在硝尔库勒盆地南缘的分支断裂, 受阿尔金断裂带构造应力影响, 硝尔库勒盆地受到局部近EW向的拉张作用力, 首先沿近SN向破裂, 这个构造部位的解锁, 促进阿尔金断裂左旋错动, 产生NE向破裂, 应力向东传递; 文中还对有历史记录以来, 阿尔金断裂上7级地震的发震构造及其对阿尔金断裂带的影响进行了讨论.

关键词: 于田地震, 阿尔金断裂, 余震分布, 构造背景

Abstract:

The Yutian M_S7.3 earthquake occurred on February 12, 2014 in Xinjiang Uygur Autonomous Region, China and the epicenter is located in the western part of Altyn Tagh Fault. This is the second M≥7 earthquake following the March 21, 2008 Yutian M_S7.3 earthquake in the south of the Tarim Basin. Aftershocks of this Yutian M_S7.3 earthquake are distributed mainly along the NE direction, and that in the southwest part of the aftershock area presents a near-NS distribution. Most of the aftershocks including foreshocks (accounting for 85% of the total aftershock sequence) are densely distributed in the southwest of the aftershock zone, the vast majority of strong aftershocks (all of the M_S≥5 and 81% magnitude 4 earthquakes)are distributed in this area. Aftershocks of the first day are mainly distributed in this area and in a near-NS distribution. The aftershocks extended from west to east. The authors noted that there occurred several M5~M6 earthquakes in 1982, 2011 and 2012 along the near-NS direction of this Yutian earthquake and this Yutian earthquake filled up the empty section. Based on the regional tectonic environment, earthquake focal mechanism solutions and aftershocks distribution, etc., we analyzed the process of this earthquake and found that the earthquake occurred at the branch fault of Altyn Tagh Fault zone on the south margin of Xiaoerkule Basin. Affected by the tectonic stress of Altyn Tagh Fault zone, Xiaoerkule Basin suffers the local near east-west extension, earthquake rupture occurred first along the near-NS direction, the unlocking of this tectonic position promotes the left-lateral movement of the Altyn Tagh Fault, producing NE-oriented rupture, and stress transferring to the east. This paper also discusses the seismogenic structures of historical earthquakes above M_S7 occurring on the Altyn Tagh Fault zone and their impact on the fault zone.

Key words: Yutian M_S7.3 earthquake, Altyn Tagh Fault, aftershock distribution, tectonic background

中图分类号:

P315.3⁺3

宋春燕, 马瑾, 冉慧敏, 黄辅琼. 2014年新疆于田7.3级地震发震构造和震前地震活动过程讨论[J]. 地震地质, 2015, 37(3): 780-791.

SONG Chun-yan, MA Jin, RAN Hui-min, HUANG Fu-qiong. DISCUSSION ON SEISMOGENIC STRUCTURES AND SEISMIC ACTIVITY PROCESS BEFORE THE YUTIAN M_S7.3 EARTHQUAKE ON FEBRUARY 12, 2014, XINJIANG[J]. SEISMOLOGY AND GEOLOGY, 2015, 37(3): 780-791.

参考文献

程佳, 刘杰, 盛书中, 等. 2014. 2014年新疆于田M_S7.3强震构造背景及其与2008年M_S7.3地震之间的关系讨论［J］. 中国地震, 30(2): 143—150.
CHENG Jia, LIU Jie, SHENG Shu-zhong, et al. 2014. Tectonic background of the Yutian M_S7.3 earthquake and its relationship with the Yutian M_S7.3 earthquake in 2008［J］. Earthquake Research in China, 30(2): 143—150(in Chinese).
国家地震局 "阿尔金活动断裂带"课题组. 1992. 阿尔金活动断裂带［M］. 北京: 地震出版社.
Research Group of "the Altyn Tagh Active Fault Zone", China Earthquake Administration. 1992. The Altyn Tagh Active Fault Zone［M］. Seismological Press, Beijing(in Chinese).
李海兵, Vander Woerd J, 孙知明, 等. 2008. 阿尔金断裂带康西瓦段晚第四纪以来的左旋滑移速率及其大地震复发周期探讨［J］. 第四纪研究, 28(2): 197—213.
LI Hai-bing, Vander Woerd J, SUN Zhi-ming, et al. 2008. Late Quaternary left-slip rate and large earthquake recurrence time along the Kangxiwar(or Karakax)segment of the Altyn Tagh Fault, northern Tibet［J］. Quaternary Sciences, 28(2): 197—213(in Chinese).
李杰, 王晓强, 王琪, 等. 2012. 2008年于田7.3级地震前西昆仑地形变的GPS初步研究［J］. 西北地震学报, 34(3): 256—262.
LI Jie, WANG Xiao-qiang, WANG Qi, et al. 2012. Crustal deformation in western Kunlun tectonic zone from GPS measurements before the Yutian M_S7.3 earthquake in 2008［J］. Northwestern Seismological Journal, 34(3): 256—262(in Chinese).
李志海, 马宏生, 曲延军. 2009. 2008年3月21日新疆于田7.3级地震发震构造与震前地震活动特征研究［J］. 中国地震, 25(2): 199—205.
LI Zhi-hai, MA Hong-sheng, QU Yan-jun. 2009. Study on seismogenic structure and seismic activity characteristics before the Yutian M7.3 earthquake on March 21, 2008, Xinjiang［J］. Earthquake Research in China, 25(2): 199—205(in Chinese).
马瑾, 郭彦双. 2014. 失稳前断层加速协同化的实验室证据和地震实例［J］. 地震地质, 36(3): 547—561. doi: 10. 3969/j.issn.0253-4967.2014.03.001.
MA Jin, GUO Yan-shuang. 2014. Accelerated synergism prior to fault instability: Evidence from laboratory experiments and an earthquake case［J］. Seismology and Geology, 36(3): 547—561(in Chinese).
聂晓红. 2008. 新疆于田7.4级地震震源机制结果［J］. 内陆地震, 22(2): 114.
NIE Xiao-hong. 2008. The map of the focal mechanism solution about Yutian earthquake with M_S7.4 of Xinjiang［J］. Inland Earthquake, 22(2): 114—114(in Chinese).
沈军, 宋和平, 陈建波, 等. 2013. 2008年3月21日新疆于田7.1级地震近断层破坏作用［J］. 地学前缘, 20(6): 85—93.
SHEN Jun, SONG He-ping, CHEN Jian-bo, et al. 2013. Field investigation on the near-fault damaging effects of the 2008 Yutian M_S7.1 earthquake in Xinjiang［J］. Earth Science Frontiers, 20(6): 85—93(in Chinese).
宋金, 周龙泉. 2014. 2014年于田M_S7.3地震产生的静态库仑应力变化及对周边断层的影响［J］. 中国地震, 30(2): 168—177.
SONG Jin, ZHOU Long-quan. 2014. The static stress triggering effects related with the Yutian M_S7.3 earthquake［J］. Earthquake Research in China, 30(2): 168—177(in Chinese).
唐明帅, 王海涛, 段天山. 2010. 利用和田地震台阵数据对2008年于田7.3级地震序列重新定位［J］. 内陆地震, 24(3): 227—235.
TANG Ming-shuai, WANG Hai-tao, DUAN Tian-shan. 2010. Relocating the seismic sequence of Yutian M_S7.3 earthquake in 2008 using the data of Xinjiang Hetian seismic array［J］. Inland Earthquake, 24(3): 227—235(in Chinese).
万永革, 沈正康, 盛书中, 等. 2010. 2008 年新疆于田7.3级地震对周围断层的影响及其正断层机制的区域构造解释［J］. 地球物理学报, 53(2): 280—289.
WAN Yong-ge, SHEN Zheng-kang, SHENG Shu-zhong, et al. 2010. The mechanical effects of the 2008 M_S7.3 Yutian, Xinjiang earthquake on the neighboring faults and its tectonic origin of normal faulting mechanism［J］. Chinese Journal of Geophysics, 53(2): 280—289(in Chinese).
王凡, 陈为涛, 王敏, 等. 2011. 利用GPS观测资料分析2008年于田M_S7.3地震的同震位移及震后形变［J］. 地球物理学报, 54(9): 2251—2255.
WANG Fan, CHEN Wei-tao, WANG Min, et al. 2011. Coseismic and postseismic deformation of M_S7.3 Yutian earthquake derived from GPS data［J］. Chinese Journal of Geophysics, 54(9): 2251—2255(in Chinese).
尹光华, 蒋靖祥, 吴国栋. 2008. 2008年3月21日于田7.4级地震的构造背景［J］. 干旱区地理, 31(4): 343—349.
YIN Guang-hua, JIANG Jing-xiang, WU Guo-dong. 2008. Tectonic background of the M_S7.4 earthquake at Yutian on March 21, 2008［J］. Arid Land Geography, 31(4): 343—349(in Chinese).
中国地质调查局西安地质调查中心. 2009. 昆仑山及邻区地质图(1:1 000 000)［M］. 北京: 地质出版社.
Xi'an Geological Survey Center of China Geological Survey. 2009. Geological Map of Kunlun Mountains and Its Adjacent Area(1:1 000 000)［M］. Geological Publishing House, Beijing(in Chinese).
Furuya M, Yasuda T. 2011. The 2008 Yutian normal faulting earthquake(M_W7.1), NW Tibet: Non-planar fault modeling and implications for the Karakax fault［J］. Tectonophysics, 511(3): 125—133.
Washburn Zachary, Ramon A J, Steven L F, et al. 2001. Late Holocene earthquake history of the central Altyn Tagh Fault, China［J］. Geology, 29(11): 1051—1054.

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2014年新疆于田7.3级地震发震构造和震前地震活动过程讨论

DISCUSSION ON SEISMOGENIC STRUCTURES AND SEISMIC ACTIVITY PROCESS BEFORE THE YUTIAN M_S7.3 EARTHQUAKE ON FEBRUARY 12, 2014, XINJIANG

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2014年新疆于田7.3级地震发震构造和震前地震活动过程讨论

DISCUSSION ON SEISMOGENIC STRUCTURES AND SEISMIC ACTIVITY PROCESS BEFORE THE YUTIAN MS7.3 EARTHQUAKE ON FEBRUARY 12, 2014, XINJIANG

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DISCUSSION ON SEISMOGENIC STRUCTURES AND SEISMIC ACTIVITY PROCESS BEFORE THE YUTIAN M_S7.3 EARTHQUAKE ON FEBRUARY 12, 2014, XINJIANG