吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (6): 1894-1903.doi: 10.13278/j.cnki.jjuese.201706306
卢燕红, 吴兆营, 丁广, 付琦, 张帆
Lu Yanhong, Wu Zhaoying, Ding Guang, Fu Qi, Zhang Fan
摘要: 为了更好地研究吉林前郭地区的地震活动性,本文利用2013年10月至2015年2月吉林前郭5.8级震群周围17个地震台站记录到的405个地震事件资料,共获得2 218条P波走时数据和2 166条S波走时数据,采用地震双差层析成像技术,获取吉林前郭震区上地壳三维P波、S波速度精细结构。结果显示,震区上地壳速度分层明显,P波速度变化范围为5.8~7.2 km/s,S波速度变化范围为3.4~4.0 km/s,波速比(vP/vS)变化较小。震区有低速带穿过,低速带走向为北东向,倾角较大(近直立),纵向延伸至15 km深度;震群主要位于低P波和S波速度区,对应较低的波速比。吉林前郭震区构造强度较低,受西太平洋板块俯冲产生应力场的影响,易于发生地震。
中图分类号:
[1] 陈作全,武成智,张淑洁,等.2013年前郭M5.8级强震群序列特征分析[J].防灾减灾学报,2015,31(3):11-15. Chen Zuoquan, Wu Chengzhi, Zhang Shujie, et al. Sequence Analysis of Strong Earthquake Group in the M5.8 in 2013[J].Journal of Disaster Prevention and Reduction,2015,31(3):11-15. [2] 葛荣峰,张庆龙,王良书,等. 松辽盆地构造演化与中国东部构造体制转换[J].地质论评,2010, 56(2):180-195. Ge Rongfeng, Zhang Qinglong, Wang Liangshu, et al. Tectonic Evolution of Songliao Basin and the Prominent Tectonic Regime Transition in Eastern China[J].Geological Review,2010,56(2):180-195. [3] 杨宝俊,唐建人,李勤学,等.松辽盆地隆起区地壳反射结构与"断开"莫霍界面[J].中国科学:D辑:地球科学,2003,33(2):170-176. Yang Baojun, Tang Jianren, Li Qinxue, et al. Crustal Reflection Structure in the Uplifting Zone of Songliao Basin and Disconnecting Moho Interface[J].Science in China:Series D:Earth Sciences,2003,33(2):170-176. [4] 盘晓东,王军亮,孙旭丽,等.乾安前郭5.0级地震的构造背景分析[J].防灾减灾学报,2007,23(1):8-15. Pan Xiaodong, Wang Junliang, Sun Xuli, et al. Analysis on the Seismic Tectonic Background of 5.0 Earthquake on the Border Between Qian'an and Qianguo County[J].Seismological Research of Northeast China,2007,23(1):8-15. [5] 刘志宏,孙理难,王超,等.松辽盆地伏龙泉断陷构造特征及演化[J].吉林大学学报(地球科学版),2015,45(3):663-673. Liu Zhihong, Sun Linan, Wang Chao, et al. Structral Features and Evolution of the Fulongquan Sag in Songliao Basin[J]. Journal of Jilin Unviersity(Earth Science Edition), 2015, 45(3):663-673. [6] 高金哲,李志伟,包丰,等.2006年吉林乾安前郭M5.0级地震深度及其成因探讨[J]. 地球物理学进展, 2013, 28(5):2328-2335. Gao Jinzhe, Li Zhiwei, Bao Feng, et al. Resolving Focal Depth of the 31 March 2006 Jilin Qian'an-Qianguo Earthquake with Multiple Datasets and Its Implication for Seismogenesis[J]. Progressin Geophysics,2013,28(5):2328-2335. [7] 刘莎,吴朋,杨建思,等.吉林省前郭地区地震各向异性的初步探讨[J].地球物理学报, 2014, 57(7):2088-2098. Liu Sha, Wu Peng, Yang Jiansi, et al. Preliminary Study of Seismic Anisotropy in Qianguo Area, Jilin Province[J]. Chinese Journal of Geophysics, 2014, 57(7):2088-2098. [8] 吴微微,杨建思,苏金蓉,等. 2013年吉林前郭-乾安震源区中强地震矩张量反演与区域孕震环境研究[J].地球物理学报,2014,57(8):2541-2554. Wu Weiwei, Yang Jiansi, Su Jinrong, et al. Moment Inversion of Moderate Earthquakes and Seismogenic Environment in Qiangguo-Qian'an Source Region,2013,Jilin Province[J]. Chinese Journal of Geophysics,2014,57(8):2541-2554. [9] 赵大鹏,J R Kayal.地震层析成像对地球科学的影响[J].世界地震译丛,2001(6):1-8. Zhao Dapeng, Kayal J R. Impact of Seismic Tomography on Earth Sciences[J].Translated World Selsmology,2001(6):1-8. [10] Zhao D, Hasegawa A, Horiuchi S. Tomographic Ima-ging of P and S Wave Velocity Structure Beneath Northeastern Japan[J].Journal of Geophysical Research:Solid Earth,1992,97(B13):19909-19928. [11] Aki K, Lee W H K. Determination of Three-Dimen-sional Velocity Anomalies Under a Seismic Array Using First P Arrival Times from Local Earthquakes:1:A Homogeneous Initial Model[J]. Journal of Geophysical Research Atmospheres, 1976, 81(23):4381-4399. [12] 王椿镛,Mooner W D,王溪莉,等.川滇地区地壳上地幔三维速度结构研究[J].地震学报,2002,24(1):1-16. Wang Chunyong, Mooner W D, Wang Xili, et al. Study on 3-D Velocity Structure of Crust and Upper Mantle in Sichuan-Yunnan Region[J].Acta Seismologica Sinica,2002,24(1):1-16. [13] Zhao D, Kanamori H, Negishi H. Tomography of the Source Area of the 1995 Kobe Earthquake:Evidence for Fluids at the Hypocenter?[J]. Science,1996, 274(5394):1891-1894. [14] Waldhauser F, Ellsworth W. A Double-Differenee Earthquake Location Algorithm:Method and Application to the Northern Hayward Fault, Ca1ifornia[J].Bul1etin of the Seismological Society of America,2000,90(6):1353-1368. [15] Latorre D, Virieux J, Monfret T, et al. A New Seismic Tomography of Aigion Area (Gulf of Corinth,Greece) from the 1991 Data Set[J].Geophysical Journal International,2004,159(3):1013-1031. [16] 邓文泽,陈九辉,郭飚,等.龙门山断裂带精细速度结构的双差层析成像研究[J].地球物理学报,2014,57(4):1101-1110. Deng Wenze, Chen Jiuhui, Guo Biao, et al. Fine Velocity Structure of the Longmenshan Fault Zone by Double-Difference Tomography[J].Chinese Journal of Geophysics,2014,57(4):1101-1110. [17] 田有,赵大鹏,刘财,等.体波走时层析成像方法及其在中国壳幔结构研究中的应用评述[J].地学前缘,2009,16(2):347-360. Tian You, Zhao Dapeng,Liu Cai,et al.A Review of Body-Wave Tomography and Its Applications to Studying the Crust and Mantle Structure in China[J]. Earth Science Frontiers,2009,16(2):347-360. [18] 田有,刘财,冯晅.中国东北地区地壳、上地幔速度结构及其对矿产能源形成的控制作用[J].地球物理学报,2011,54(2):407-414. Tian You, Liu Cai, Feng Xuan. P-Wave Velocity Structure of Crust and Upper Mantle in Northeast China and Its Control on the Formation of Mineral and Energy[J].Chinese Journal of Geophysics, 2011, 54(2):407-414. [19] Zhang H J, Thurder C H.Double-Difference Tomo-graphy:The Method and Its Application to the Hayward Fault, California[J].Bulletion of the Seismological Society of America, 2003, 93(5):1875-1889. [20] 滕吉文,张中杰,白武明,等.岩石圈物理学[M].北京:科学出版社,2004:556-566. Teng Jiwen, Zhang Zhongjie, Bai Wuming, et al. Physics of the Lithosphere[M].Beijing:Science Publishing House,2004:556-566. [21] 刘洋,刘财,杨宝俊.松辽盆地北部纵波速度区域特征分析及深层油气问题[J].地球物理学进展,2008,23(3):785-792. Liu Yang, Liu Cai, Yang Baojun. Regional Characteristic Analysis of P-Wave Velocity and Deep Oilgas in the Northern Songliao Basin[J]. Progress in Geophysics, 2008, 23(3):785-792. |
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