SEISMOLOGICAL STUDY ON BEHAVIORS OF PRESENT-DAY MOVEMENT OF ARCUATE TECTONIC BELT IN SOUTHEAST YUNNAN

doi:10.3969/j.issn.0253-4967.2013.01.001

Abstract

Abstract:

The accurate relocations of small earthquakes during 1990-2011 on the arcuate tectonic belt in southeast Yunnan (23°N to 25°N,101°E to 103°E) are obtained by hypo2000 and double difference algorithm using Pg and Sg phase readings of 721 earthquakes recorded by Yunnan Earthquake Network Center.The RMS residual decreases to 0.45 from 1.43 with an average precision of about 1.4km horizontally and 1.9km vertically after relocation. Then we collected the waveform data of the study region during 2007-2012 and calculated the focal mechanisms of 148 small earthquakes with the method of the maximum amplitude ratio between Pg and Sg. Focal mechanism result shows that the number of nodal planes representing normal strike-slip is almost twice of that of the reverse strike-slip,which demonstrates that the dominant movement on the arcuate tectonic belt is normal strike-slip currently. Relocation of small earthquakes greatly improves the definition of the seismic images on the faults that generate them. According to the relocated focal depths,the Qujing Fault and Shiping-Jianshui Fault dip southwest,and the Honghe Fault dips northeast,which are in accord with the fault geometric characteristics revealed by crustal velocity profiles. According to this,the rollback of Sumatra-Myanmar trench has already brought a deep effect on the arcuate tectonics in southeast Yunnan,the compression caused by the slip of Sichuan-Yunnan rhombic block towards SSE may be weakened. So the tensile stress in SWW-NEE direction plays a more important role in present-day activities of the arcuate tectonics compared to the compressive stress in SSE-NNW direction,which can also be deduced from the characteristics of focal mechanism parameters. A transtensional zone may be emerging from the arcuate tectonics in southeast Yunnan.

Key words: arcuate tectonic belt, small earthquake relocation, focal mechanism solution, present-day behaviors of fault motion

摘要：

利用hypo2000和hypoDD程序对滇东南弧形构造带1990—2011年间的小震进行了重新定位和精定位; 精定位后水平误差≤1.4km,垂直误差≤1.9km。在此基础上,根据P波和S波最大振幅比法,得到区内2007—2012年间148个小震的震源机制解。研究表明,正-走滑滑动性质的节面数几乎为逆-走滑的2倍,显示该区现今构造活动以正-走滑性质为主。根据精定位后的小震震源深度剖面特征,曲江断裂、石屏-建水断裂倾向SW,红河断裂倾向NE,与该地区地壳速度结构剖面所反映的断裂几何学特征一致。在大陆动力学背景上,苏门答腊-缅甸海沟的回拉效应影响边界可能已经沿NEE方向深入到曲江断裂和石屏-建水断裂,而川滇块体SSE向的推挤作用在滇东南弧形构造带可能已居于次要地位,与SSE-NNW向的挤压作用相比,SWW-NEE向的拉张效应在滇东南现今构造活动中起着更重要的作用。这样的构造动力学背景与小震震源参数的总体特征所反映的构造力学环境也是一致的,滇东南弧形构造带可能是一个正在形成的张-剪性构造区。

关键词: 弧形构造带, 小震精定位, 震源机制解, 现今活动性质

CLC Number:

P315.2

HU Nan, HAN Zhu-jun. SEISMOLOGICAL STUDY ON BEHAVIORS OF PRESENT-DAY MOVEMENT OF ARCUATE TECTONIC BELT IN SOUTHEAST YUNNAN[J]. SEISMOLOGY AND GEOLOGY, 2013, 35(1): 1-21.

呼楠, 韩竹军. 滇东南弧形构造带现今活动性质的地震学研究[J]. 地震地质, 2013, 35(1): 1-21.

References

白志明,王椿镛.2003.云南地区上部地壳结构和地震构造环境的层析成像研究［J］.地震学报,25(2): 117—127.
BAI Zhi-ming,WANG Chun-yong.2003.Tomographic investigation of the upper crustal structure and seismotectonic environments in Yunnan Province ［J］.Acta Seismologica Sinica,25(2): 117—127(in chinese).
陈立德.1988.1970年1月5日云南省通海7.7级地震 .见: 中国震例.北京: 地震出版社.57—76.
CHEN Li-de.1988.M_S 7.7 earthquake on January 5,1970 in Tonghai,Yunnan .In: Earthquake Case in China. Seismological Press,Beijing.57—76(in Chinese).
陈天长,堀内茂木,郑斯华.2001.利用 P 波初动和短周期 P,S 波振幅测定川滇地区地震震源机制解和应力场［J］.地震学报,23(4): 436—440.
CHEN Tian-chang,Horiuchi Nana-motegi,ZHENG Si-hua.2001.Earthquake focal mechanisms and stress field in Sichuan-Yunnan area determined using P wave polarity and short period P and S waveform data ［J］.Acta Seismologica Sinica,23(4): 436—440(in Chinese).
陈九辉,刘启元,李顺成,等.2009.汶川M_S 8.0地震余震序列重新定位及其地震构造研究［J］.地球物理学报,52(2): 390—397.
CHEN Jiu-hui,LIU Qi-yuan,LI Shun-cheng,et al.2009.Seismotectonic study by relocation of the Wenchuan M_S8.0 earthquake sequence ［J］.Chinese J Geophys,52(2): 390—397(in Chinese).
崔效锋,谢富仁,张红艳.2006.川滇地区现代构造应力场分区及动力学意义［J］.地震学报,28(5): 451—461.
CUI Xiao-feng,XIE Fu-ren,ZHANG Hong-yan.2006.Recent tectonic stress field zoning in Sichuan-Yunnan region and its dynamic implications ［J］.Acta Seismologica Sinica,28(5): 451—461(in Chinese).
邓起东.1984.断层性状、盆地类型及其形成机制［J］.地震研究,(3): 58—64.
DENG Qi-dong.1984.Character,basin type and formation mechanism of faults ［J］.Journal of Earthquake Studies,(3): 58—64(in Chinese).
刁桂苓,王绍晋,龙晓帆,等.1996.1976 年龙陵震群的小震震源机制［J］.地震研究,19(4): 331—339.
DIAO Gui-ling,WANG Shao-jin,LONG Xiao-fan,et al.1996.Focal mechanisms of small events to Longling earthquake swarms in 1976 ［J］. Journal of Seismological Research,19(4): 331—339(in Chinese).
刁桂苓,徐锡伟,王晓山,等.2010.汶川 M_W7.9 和集集 M_W7.6 地震前应力场转换现象及其可能的前兆意义［J］.地球物理学报,54(1): 128—136.
DIAO Gui-ling,XU Xi-wei,WANG Xiao-shan,et al.2011.The precursory significance of tectonic stress field transformation before the Wenchuan M_W7.9 earthquake and the Chi-Chi M_W7.6 earthquake ［J］.Chinese J Geophys,54(1): 128—136(in Chinese).
阚荣举,林中洋.1986.云南地壳上地幔构造的初步研究［J］.中国地震,2(4): 50—61.
KAN Rong-ju,LIN Zhong-yang.1986.A preliminary study on crustal and upper mantle structure in Yunnan ［J］.Earthquake Research in China,2(4): 50—61(in Chinese).
阚荣举,张四昌,晏凤桐,等.1977.我国西南地区现代构造应力场与现代构造活动特征的探讨［J］.地球物理学报,20(2): 96—109.
KAN Rong-ju,ZHANG Si-chang,YAN Feng-tong,et al.1977.Present tectonic stress field and its relation to the charactoristics of recent tectonic activity in southwestern China ［J］.Chinese J Geophys,20(2): 96—109(in Chinese).
何宏林,李玶,方仲景.1992.滇东南楔形构造区发震构造背景探讨［J］.地震地质,14(3): 217—226.
HE Hong-lin,LI Ping,FANG Zhong-jing.1992.Analysis of seismogenic conditions in the wedge tectonic region of southeast Yunnan Province ［J］.Seismology and Geology,14(3): 217—226(in Chinese).
韩新民,柴天俊,肖九安,等.1982.石屏-建水断裂中段的新活动与地震［J］.地震研究,5(2): 220—225.
HAN Xin-min,CHAI Tian-jun,Xiao Jiu-an,et al.1982.Neotectonic movement of the central part of the Shiping-Jianshui Fault in Yunnan Province and earthquake ［J］.Journal of Seismological Research,5(2): 220—225(in Chinese).
韩新民,毛玉平.1993.石屏-建水断裂带未来三十年内七级以上大地震危险性分析［J］.地震研究,16(1): 52—59.
HAN Xin-min,MAO Yu-ping.1993.Seimic risk analysis to Shiping-Jianshui Fault zone in the next 30 years ［J］.Journal of Seismological Research,16(1): 52—59(in Chinese).
韩竹军,任伏虎,小川雄二郎,等.1996.1995年1月17日日本阪神7.2级地震的构造条件研究［J］.地震学报,18(4): 523—528.
HAN Zhu-jun,REN Fu-hu,Koizumi Jujiro,et al.1996.The structural environment of M_L 7.2 Hyogoken-Nanbu earthquake on January 17,1995 ［J］.Acta Seismologica Sinica,18(4): 523—528(in Chinese).
胡鸿翔,高世玉.1993.云南基底界面速度分布与浅层断裂的爆破地震研究［J］.中国地震,15(2): 181—185.
HU Hong-xiang,GAO Shi-yu.1993. Investigation of fine velocity structure of the basement layer of earths crust in western Yunnan region ［J］.Earthquake Research in China,15(2): 181—185(in Chinese).
胡鸿翔,李学清.1994.云南地区孟连—思茅—马龙剖面的基底速度细结构 .见:陈运泰主编.中国固体地球物理学进展.北京: 海洋出版社.100—106.
HU Hong-xiang,LI Xue-qing.1994.The fine velocity structure of the basement layer of the Menglian-Simao-Malong profile in Yunnan region .In: CHEN Yun-tai et al.(eds).Advances in Solid Earth Geophysics in China. Ocean Press,Beijing.100—106(in Chinese).
胡鸿翔,陆涵行,王椿镛,等.1986.滇西地区地壳结构的爆破地震研究［J］.地球物理学报,29(2): 133—144.
HU Hong-xiang,LU Han-hang,WANG Chun-yong,et al.1986.Explosion investigation of the crust structure in western Yunnan Province ［J］.Chinese J Geophys,29(2): 133—144(in Chinese).
胡家富,苏有锦,朱雄关,等.2003.云南的地壳 S 波速度与泊松比结构及其意义［J］.中国科学(D辑),33(8): 714—722.
HU Jia-fu,SU You-jin,ZHU Xiong-guan,et al.2003.The velocity of crustal S waveform and Poisson ratio structure and the their significance in Yunnan region ［J］.Science in China(Ser D),33(8): 714—722(in Chinese).
胡新亮,刁桂苓,马瑾,等.2004.利用数字地震记录的P ,S 振幅比资料测定小震震源机制解的可靠性分析［J］.地震地质,26(2): 347—354.
HU Xin-liang,DIAO Gui-ling,MA Jin,et al.2004.Reliability analysis of focal mechanism solutions of micro-earthquakes determined from amplitude ratio of P and S recorded by digital seismograph ［J］.Seismology and Geology,26(2): 347—354(in Chinese).
黄媛,杨建思,张天中.2006.2003 年新疆巴楚-伽师地震序列的双差法重新定位研究［J］.地球物理学报,49(1): 162—169.
HUANG Yuan,YANG Jian-si,ZHANG Tian-Zhong.2006.Relocation of the Bachu-Jiashi,Xinjian earthquake sequence in 2003 using the double difference location algorithm ［J］.Chinese J Geophys,49(1): 162—169(in Chinese).
蒋维强,林纪曾,赵毅,等.1992.华南地区的小震震源机制与构造应力场［J］.中国地震,8(1): 36—42.
JIANG Wei-qiang,LIN Ji-ceng,ZHAO Yi,et al.1992.Focal mechanism of small earthquakes and characteristics of tectonic stress field in South China ［J］.Earthquake Research in China,8(1): 36—42(in Chinese).
李玶主编.1993.鲜水河-小江断裂带［M］.北京: 地震出版社.
LI Ping(ed).1993.Xianshuihe-Xiaojing Fault Belt ［M］.Seismological Press,Beijing(in Chinese).
梁尚鸿,李幼铭,束沛镒,等.1984.利用区域地震台网 P,S 振幅比资料测定小震震源参数［J］.地球物理学报,27(2): 513—525.
LIANG Shang-hong,LI You-ming,SHU Pei-yi,et al.1984.On the determination of source parameters of small earthquakes by using amplitude ratios of and from regional network observations ［J］.Chinese J Geophys,27(2): 513—525(in Chinese).
林纪曾,蒋维强,李幼铭,等.1991.粤东、闽南沿海小震震源参数的研究［J］.地震学报,13(4): 420—429.
LIN Ji-zeng,JIANG Wei-qiang,LI You-ming,et al.1991.Determination of source parameters of small earthquakes in the east part of Guangdong and south part of Fujian Province ［J］.Acta Seismologica Sinica,13(4): 420—429(in Chinese).
林中洋,胡鸿翔,张文彬,等.1993.滇西地区地壳上地幔速度结构特征的研究［J］.地震学报,15(4): 427—440.
LIN Zhong-yang,HU Hong-xiang,ZHANG Wen-bin,et al.1993.Study on the velocity structure of crustal upper mantle in western Yunnan ［J］.Acta Seismologica Sinica,15(4): 427—440(in Chinese).
刘祖荫,皇甫岗,金志林.1990.一九七○年通海地震［M］.北京:地震出版社.
LIU Zu-yin, HUANGFU Gang, JIN Zhi-lin. 1999.Tonghai Earthquake, 1970 ［M］. Seismological Press, Beijing(in Chinese).
吕坚,郑勇,倪四道,等.2008.2005 年 11 月 26 日九江-瑞昌 M_S 5.7,M_S 4.8 地震的震源机制解与发震构造研究［J］.地球物理学报,51(1): 158—164.
LV Jian,ZHENG Yong,NI Si-dao,et al.2008.Study on focal mechanism and seismogenic structure of M_S 5.7 and M_S 4.8 earthquakes in Jiujiang-Ruichang on November 26,2005 ［J］.Chinese J Geophys,51(1): 158—164(in Chinese).
龙锋,张永久,闻学泽,等.2010.2008年8月30日攀枝花-会理6.1级地震序列M_L≥4.0事件的震源机制解［J］.地球物理学报,53(12): 2852—2860.
LONG Feng,ZHANG Yong-jiu,WEN Xue-ze,et al.2010.Focal mechanism solutions of M_L≥ 4.0 events in the M_S 6.1 Panzhihua-Huili earthquake sequence of Aug.30,2008 ［J］.Chinese J Geophys,53(12): 2852—2860(in Chinese).
宋方敏,汪一鹏,俞维贤,等.1998.小江活动断裂带［M］. 北京:地震出版社.
SONG Fang-min, WANG Yi-peng, YU Wei-xian, et al. 1998. Xiaojiang Active Fault Zone ［M］. Seismological Press, Beijing(in Chinese).
宋美琴,郑勇,葛粲,等.2012.山西地震带中小震精确位置及其显示的山西地震构造特征［J］.地球物理学报,55(2): 513—525.
SONG Mei-qin,ZHENG Yong,GE Can,et al.2012. Relocation of small to moderate earthquakes in Shanxi Province and its relation to the seismogenic structures ［J］.Chinese J Geophys,55(2): 513—525(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动样式及其动力来源［J］.中国科学(D辑),33(1): 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(1): 151—162.
许忠淮,汪素云,黄雨蕊,等.1987.由多个小震推断的青甘和川滇地区地壳应力场的方向特征［J］.地球物理学报,30(5): 476—486.
XU Zhong-huai,WANG Su-yun,HUANG Yu-rui,et al.1987.Directions of mean stress axes in southwestern China deduced from microearthquakes data ［J］.Chinese J Geophys,30(5): 476—486(in Chinese).
许忠淮,阎明,赵仲和.1983.由多个小地震推断的华北地区构造应力场的方向［J］.地震学报,5(3): 268—279.
XU Zhong-huai,YAN Ming,ZHAO Zhong-he.1983.Evaluation of the direction of tectonic stress in North China from recorded data of a large number of small earthquakes ［J］.Acta Seismologica Sinica,5(3): 268—279(in Chinese).
谢富仁,祝景忠,梁海庆,等.1993.中国西南地区现代构造应力场基本特征［J］.地震学报,15(4): 407—417.
XIE Fu-ren,ZHU Jing-Zhong,LIANG Hai-qing,et al.1993.The basic charactoristics of modern tectonic stress field in southeast region of China ［J］.Acta Seismologica Sinica,15(4): 407—417(in Chinese).
许力生,陈运泰.1999.1997 年中国西藏玛尼 M_S7.9 地震的时空破裂过程［J］.地震学报,21(5): 449—459.
XU Li-sheng,CHEN Yun-tai.1999.Temporal and spatial rupture process of the Mani earthquake with magnitude.M_S7.9,occurred in 1997,Tibet,China ［J］.Acta Seismologica Sinica,21(5): 449—459(in Chinese).
吴荣辉,梁尚鸿,赵里,等.1989.北京地区中小地震震源机制及构造应力场研究［J］.地震,(2): 25—31.
WU Rong-hui,LIANG Shang-hong,ZHAO Li,et al.1989.Focal mechanisms of moderate and small earthquakes and tectonic stress field in the Beijing area ［J］.Earthquake,(2): 25—31(in Chinese).
王椿镛,朱成男,刘玉权.1978.用地形变资料测定通海地震的地震断层参数［J］.地球物理学报,21(3): 191—198.
WANG Chun-yong,ZHU Cheng-nan,LIU Yu-quan.1978.Determination of earthquake fault parameters for the Tonghai earthquake from ground deformation data ［J］.Chinese J Geophys,21(3): 191—198(in Chinese).
王椿镛,Mooney W D,王溪莉,等.2002.川滇地区地壳上地幔三维速度结构研究［J］.地震学报,24(1): 1—16.
WANG Chun-yong,Mooney W D,WANG Xi-li,et al.2002.Study on 3-D velocity structure of crust and upper mantle in Sichun-Yunnan region,China ［J］.Acta Seismologica Sinica,24(1): 1—16(in Chinese).
闻学泽.1993.小江断裂带的破裂分段与地震浅势概率估计［J］.地震学报,15(3): 322—330.
WEN Xue-ze.1993.Rupture segmentation and probability estimitation of potential sources for Xiaojiang Fault ［J］.Acta Seismologica Sinica,15(3): 322—330(in Chinese).
闻学泽,杜方,龙峰,等.2011.小江和曲江-石屏两断裂系统的构造动力学与强震序列的关联性［J］.中国科学(D辑),41(5): 713—724.
WEN Xue-ze,DU Fang,LONG Feng,et al.2011.The relationship between tectonic dynamic and strong earthquake sequence of Xiaojiang and Shiping-Jianshui Fault system ［J］.Science in China(Ser D),41(5): 713—724(in Chinese).
吴建平,明跃红,王椿镛.2006.川滇地区速度结构的区域地震波形反演研究［J］.地球物理学报,49(5): 1369—1376.
WU Jian-ping,MING Yue-hong,WANG Chun-yong.2006.Regional waveform inversion for crustal and upper mantle velocity structure below Chuandian region ［J］.Chinese J Geophys,49(5): 1369—1376(in Chinese).
王阎昭,王恩宁,沈正康,等.2008.基于GPS资料约束反演川滇地区主要断裂现今活动速率［J］.中国科学(D辑),38(5): 582—597.
WANG Yan-zhao,WANG En-ning,SHEN Zheng-kang,et al.2008.GPS constrained inversion of present-day slip rate along major faults of the Sichuan-Yunnan region,China ［J］.Science in China(Ser D),38(5): 582—597(in Chinese).
鄢家全,时振梁,汪素云,等.1979.中国及邻区现代构造应力场的区域特征［J］.地震学报,1(1): 9—24.
YAN Jia-quan,SHI Zhen-liang,WANG Su-yun,et al.1979.Some features of the recent tectonic stress field of China and environs ［J］.Acta Seismologica Sinica,1(1): 9—24(in Chinese).
姚振兴.1979.层状介质、非轴对称震源情况下的反射法［J］.地球物理学报,22(2): 181—194.
YAO Zhen-xing.1979.Generalized refection coefficients for a layered medium and asymmetrical source ［J］.Chinese J Geophys,22(2): 181—194(in Chinese).
于利民,姚殿义,李钦祖,等.1990.山西地区小震震源参数测定和构造应力场特征［J］.中国地震,6(2): 70—75.
YU Li-min,YAO Dian-yi,LI Qin-zu,et al.1990.Determination of source parameters of small earthquakes and characteristics of tectonic stress field in Shanxi Province ［J］.Earthquake Research in China,6(2): 70—75(in Chinese).
杨智娴,陈运泰,郑月军,等.2003.双差地震定位法在中国中西部地区地震精确定位中的应用［J］.中国科学(D辑),33(B04): 129—134.
YANG Zhi-xian,CHEN Yun-tai,ZHENG Yue-jun,et al.2003. Accurate relocation of earthquakes in central western China using the double difference earthquake location algorithm ［J］.Science in China(Ser D),33(B04): 129—134(in Chinese).
俞维贤,王彬,刘玉权,等.2004.曲江断裂及其周边地区现今地壳垂直形变特征［J］.大地测量与地球动力学,24(1): 85—89.
YU Wei-xian,WANG Bin,LIU Yu-quan,et al.2004.The current charactoristics of crust vertical deformation of Qujiang Fault and environs ［J］.Journal of Geodesy and Geodynamics,24(1): 85—89(in Chinese).
朱艾斓,徐锡伟,周永胜,等.2005.川西地区小震重新定位及其活动构造意义［J］.地球物理学报,48(3): 629—636.
ZHU Ai-lan,XU Xi-wei,ZHOU Yong-sheng,et al.2005.Relocation of small earthquakes in western Sichuan,China and its apllications for active tectonics ［J］.Chinese J Geophys,48(3): 629—636(in Chinese).
张培震,邓起东,张国民,等.2003.中国大陆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 tetonic blocks and strong earthquakes in the continent of China ［J］.Science in China(Ser D),33(Suppl): 12—20(in Chinese).
张培震,甘卫军,沈正康,等.2005.中国大陆现今构造作用的地块运动和连续变形耦合模型［J］.地质学报,79(6): 748—756.
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—756(in Chinese).
郑秀芬,欧阳飚,张东宁,等.2009."国家数字测震台网数据备份中心"技术系统建设及其对汶川大地震研究的数据支撑［J］.地球物理学报,52(5): 1412—1417.
ZHENG Xiu-feng,OUYANG Biao,ZHANG Dong-ning,et al.2009.Technical system construction of Data Backup Centre for China Seismograph Network and the data support to researches on the Wenchuan earthquake ［J］.Chinese J Geophys,52(5): 1412—1417(in Chinese).
Allmendinger R W,Reilinger R,Loveless J.2007.Strain and rotation rate from GPS in Tibet,Anatolia,and the Altiplano ［J］.Tectonics,26(3): TC3013.
Avouac J P,Tapponnier P.1993.Kinematic model of active deformation in central Asia ［J］.Geophysical Research Letters,20(10): 895—898.
Dunn M,Horton S,DeShon H,et al.2010.High-resolution earthquake relocation in the New Madrid seismic zone ［J］.Seismological Research Letters,81(2): 406—413.
England P,Molnar P.1997.Active deformation of Asia: From kinematics to dynamics ［J］.Science,278(5338): 647—650.
Fojtíková L,Vavrycuk V,Cipciar A,et al.2010.Focal mechanisms of micro-earthquakes in the Dobr Voda seismo active area in the Malé Karpaty Mts(Little Carpathians),Slovakia ［J］.Tectonophysics,492(1-4): 213—229.
Gilbert F,Dziewonski A M.1975.An application of normal mode theory to the retrieval of structural parameters and source mechanisms from seismic spectra ［J］.Philosophical Transactions for the Royal Society of London,Series A,Mathematical and Physical Sciences,187—269.
Hardebeck J L,Hauksson E.2001.Stress orientations obtained from earthquake focal mechanisms: What are appropriate uncertainty estimates ［J］.Bulletin of the Seismological Society of America,91(2): 250—262.
Hardebeck J L,Shearer P M.2003.Using S/P amplitude ratios to constrain the focal mechanisms of small earthquakes ［J］.Bulletin of the Seismological Society of America, 93(6): 2434—2444.
Kisslinger C.1980.Evaluation of S to P amplitude ratios for determining focal mechanisms from regional network observations ［J］.Bulletin of the Seismological Society of America,70(4): 999—1014.
Kisslinger C,Bowman J R,Koch K.1981.Procedures for computing focal mechanisms from local(SV/P)z data ［J］.Bulletin of the Seismological Society of America,71(6): 1719—1729.
Schoenbohm L M, Burchfiel B C, Chen L Z. 2006. Propagation of surface uplift, lower crustal flow, and Cenozoic tectonics of the southeast margin of the Tibetan Plateau ［J］. Geology, 34(10):813—816.
Schaff D P,Bokelmann G H R, Beroza G C,et al.2002.High-resolution image of Calaveras Fault seismicity ［J］.J Geophys Res,107(10.1029).
Shearer P M.2002.Parallel fault strands at 9km depth resolved on the Imperial Fault,southern California ［J］.Geophysical Research Letters,29(14): 1674—1677.
Shen Z K,Lu J,Wang M,et al.2005.Contemporary crustal deformation around the southeast borderland of the Tibetan plateau ［J］.J Geophys Res,110(B11409): 1—17.
Stump B W,Johnson L R.1977.The determination of source properties by the linear inversion of seismograms ［J］.Bulletin of the Seismological Society of America,67(6): 1489—1502.
Tapponnier P,Zhiqin X,Roger F,et al.2001.Oblique stepwise rise and growth of the Tibet Plateau ［J］.Science,294(5547): 1671—1677.
Royden, Burchfiel B C, Robert W K, et al. 1997. Surface deformation and lower crustal flow in Eastern Tibet ［J］. Science, 276(2):788—790.
Replumaz A, Tapponnier P. 2003. Reconstruction of the deformed collision zone between India and Asia by backward motion of lithospheric blocks ［J］. Journal of Geophysical Research, 108(B6):2285—2308.
Waldhauser F,Ellsworth W L.2000.A double-difference earthquake location algorithm: Method and application to the northern Hayward Fault,California ［J］.Bulletin of the Seismological Society of America,90(6): 1353—1368.
Wang E.1998.Late Cenozoic Xianshuihe-Xiaojiang,Red River,and Dali Fault systems of southwestern Sichuan and central Yunnan,China ［J］.Spec Pap Geol Soc Am,327: 108.
Zhang P Z,Shen Z K,Wang M,et al.2004.Continental deformation of the Tibetan plateau from global positioning system data ［J］.Geology,32(9): 809—812.

[1]	YU Zhan-yang, SHEN Xu-zhang, LIANG Hao, ZHENG Wen-jun, LIU Xu-zhou. THE CHARACTERISTICS OF MAJOR FAULTS AND STRESS FIELD IN WEIHE-YUNCHENG BASIN CONSTRAINED BY SEISMIC ACTIVITY AND FOCAL MECHANISM SOLUTIONS [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 395-413.
[2]	ZHANG Zhi-wei, LONG Feng, ZHAO Xiao-yan, WANG Di. STUDY ON FOCAL MECHANISM SOLUTION AND STRESS FIELD CHARACTERISTICS IN SICHUAN AND YUNNAN AREA [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(1): 170-187.
[3]	ZHAO Tao, WANG Ying, MA Ji, SHAO Ruo-tong, XU Yi-fei, HU Jing. RELOCATION AND FOCAL MECHANISM SOLUTIONS OF THE 2021 MADUO, QINGHAI M_S7.4 EARTHQUAKE SEQUENCE [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(4): 790-805.
[4]	WANG Ying, ZHAO Tao, HU Jing, LIU Chun. RELOCATION AND FOCAL MECHANISM SOLUTIONS OF THE 2021 YANGBI, YUNNAN M_S6.4 EARTHQUAKE SEQUENCE [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(4): 847-863.
[5]	LI Jin, JIANG Hai-kun, WEI Yun-yun, SUN Zhao-jie. PRELIMINARY STUDY FOR SEISMOGENIC STRUCTURE OF THE M_S6.4 JIASHI EARTHQUAKE ON JANUARY 19, 2020 [J]. SEISMOLOGY AND GEOLOGY, 2021, 43(2): 357-376.
[6]	LIANG Shan-shan, XU Zhi-guo, SHENG Shu-zhong, ZHANG Guang-wei, ZHAO-Bo, ZOU Li-ye. FOCAL MECHANISM SOLUTIONS AND STRESS FIELD OF THE 2019 CHANGNING, SICHUAN MAINSHOCK AND ITS MODERATE-STRONG AFTERSHOCKS(M_S≥4.0) [J]. SEISMOLOGY AND GEOLOGY, 2020, 42(3): 547-561.
[7]	ZHANG Zhi-bin ZHAO Xiao-cheng REN Lin. FOCAL MECHANISM SOLUTION AND TECTONIC STRESS FIELD CHARACTERISTICS OF THE MIDDLE TIANSHAN MOUNTAINS, XINJIANG [J]. SEISMOLOGY AND GEOLOGY, 2020, 42(3): 595-611.
[8]	ZHAN Hui-li, ZHANG Dong-li, HE Xiao-hui, SHEN Xu-zhang, ZHENG Wen-jun, LI Zhi-gang. LIMITATION OF CURRENT TECTONIC DEFORMATION MODES IN THE WESTERN MARGIN OF ORDOS BASED ON SEISMIC ACTIVITY CHARACTERISTICS [J]. SEISMOLOGY AND GEOLOGY, 2020, 42(2): 346-365.
[9]	DUAN Meng-qiao, ZHAO Cui-ping. CHARACTERISTICS OF FOCAL MECHANISMS IN THE DOWNSTREAM RESERVOIR AREAS OF JINSHA RIVER [J]. SEISMOLOGY AND GEOLOGY, 2019, 41(5): 1155-1171.
[10]	XIE Zhang-di, HAN Zhu-jun. STUDY ON THE SEISMOGENIC FAULT AND DYNAMICS PARAME-TERS OF THE 2014 M_S6.6 JINGGU EARTHQUAKE IN YUNNAN [J]. SEISMOLOGY AND GEOLOGY, 2019, 41(4): 887-912.
[11]	LIU Fang-bin, QU Jun-hao, LI Ya-jun, FAN Xiao-yi, MIAO Qing-jie. RESEARCH ON CHARACTERISTICS OF THE FOCAL MECHANISM SOLUTIONS CONSISTENCY OF RUSHAN EARTHQUAKE SEQUENCE, SHANDONG PROVINCE [J]. SEISMOLOGY AND GEOLOGY, 2018, 40(5): 1086-1099.
[12]	SUN Ye-jun, ZHAO Xiao-yan, HUANG Yun, YANG Hao, LI Feng. CHARACTERISTICS OF FOCAL MECHANISMS AND STRESS FIELD OF YUNNAN AREA [J]. SEISMOLOGY AND GEOLOGY, 2017, 39(2): 390-407.
[13]	JIANG ying, LIU Zi-wei, LI Hui, ZHANG Xiao-tong, WEI-Jin, SHEN Chong-yang. CONSTRAINING THE FOCAL MECHANISM OF THE 2015 NEPAL EARTHQUAKE WITH OBSERVATIONS OF THE CONTINUOUS GRAVITY STATIONS [J]. SEISMOLOGY AND GEOLOGY, 2016, 38(3): 660-669.
[14]	WANG Peng, ZHENG Jian-chang, LIU Xi-qiang, XU Chang-peng, LI Xia. research of source parameters and stress state in shandong segment of tanlu fault zone [J]. SEISMOLOGY AND GEOLOGY, 2015, 37(4): 966-981.
[15]	HAN Xiao-ming, LIU Fang, ZHANG Wen-tao, LI Juan, HOU Di. analyzing the variation characteristics of stress field in hetao seismic belt using focal mechanism data [J]. SEISMOLOGY AND GEOLOGY, 2015, 37(4): 1030-1042.