THE INVERSION OF S-WAVE VELOCITY STRUCTURE IN NINGXIA AND ITS ADJACENT AREA USING BACKGROUND NOISE IMAGING TECHNOLOGY

doi:10.3969/j.issn.0253-4967.2017.03.012

Abstract

Abstract: In this paper, we use seismic waveform data of 90 seismic stations in Ningxia and its adjacent areas recorded between January 2012 and December 2013 to obtain the Rayleigh surface wave group velocity dispersion of the study area according to the noise imaging method and the 3-D S-wave velocity structure of the crust and upper mantle in Ningxia and its adjacent regions. The results show that within the depth range of 10~40km in Yinchuan graben and Liupanshan fault belt there exists a slow anomaly body, and with the increase of the depth this slow anomaly becomes an abnormal slow zone surrounding Lanzhou Basin between the massif arcuate structure of northeastern margin of Tibet Plateau and Alxa block. The 3-D S-wave velocity structure of the crust and upper mantle of the study area presents obvious lateral inhomogeneity. These results have important significance for the study of the dynamics of active tectonic zones and mechanism of strong earthquakes in Ningxia and its adjacent areas.

Key words: background noise imaging, cross correlation, dispersion curve, S-wave velocity structure, Ningxia and its adjacent regions

摘要： 利用宁夏及邻区90个地震观测台站记录的2012年1月至2013年12月地震波形数据，根据噪声成像方法得到研究区瑞利面波群速度频散资料，获得了宁夏及邻区下方地壳上地幔三维S波速度结构。结果表明，在10~40km深度范围内，银川地堑和六盘山断裂带下方呈现出低速异常体，随着深度的增加低速异常在阿拉善地块与青藏高原NE缘弧形构造区之间成为环绕兰州盆地的低速异常区；研究区地壳及上地幔三维S波速度结构存在明显的横向不均匀性。这些结果对于研究宁夏及邻区活动构造带的动力学和强震发震机理有意义。

CLC Number:

P315.6

XIE Hui, MA He-qing, JIAO Ming-ruo, MA Xiao-jun, ZHANG Nan, LI-Qing-mei. THE INVERSION OF S-WAVE VELOCITY STRUCTURE IN NINGXIA AND ITS ADJACENT AREA USING BACKGROUND NOISE IMAGING TECHNOLOGY[J]. SEISMOLOGY AND GEOLOGY, 2017, 39(3): 605-622.

谢辉, 马禾青, 焦明若, 马小军, 张楠, 李青梅. 利用背景噪声成像技术反演宁夏及邻区S波速度结构[J]. 地震地质, 2017, 39(3): 605-622.

References

柴炽章, 张维岐, 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).
陈强森, 鲍学伟, 徐树斌, 等. 2013. 利用背景噪声反演鄂尔多斯块体及其南缘地区地壳速度结构［J］. 高校地质学报, 19(3):504-512.
CHEN Qiang-sen, BAO Xue-wei, XU Shu-bin, et al. 2013. The crustal velocity structure of the Ordos block and its southern edge revealed from the ambient seismic noise extraction［J］. Geological Journal of China Universities, 19(3):504-512(in Chinese).
邓起东, 尤惠川. 1985. 鄂尔多斯周缘断陷盆地带的构造活动特征及其形成机制[M]//国家地震局地质研究所编. 现代地壳运动研究(1). 北京:地震出版社:58-78.
DENG Qi-dong, YOU Hui-chuan. 1985. Characteristics of tectonic movement and formation mechanism of the fault-depression basin zones around Ordos block[M]//Institute of Geology, State Seismological Bureau(ed). The Research on Recent Crustal Movement(1). Seismological Press, Beijing:58-78(in Chinese).
邓起东, 张维岐, 汪一鹏, 等. 1987. 海原走滑断裂带和1920年海原地震断层基本特征及其形成机制[M]//国家地震局地质研究所编. 现代地壳运动研究(3). 北京:地震出版社:9-25.
DENG Qi-dong, ZHANG Wei-qi, WANG Yi-peng, et al. 1987. The basic characteristics and the formation mechanism of Haiyuan Fault and Haiyuan earthquake in 1920[M]//Institute of Geology, Seismological Bureau(ed). Research on Recent Crustal Movement(3). Seismological Press, Beijing:9-25(in Chinese).
丁国瑜, 蔡文伯, 于品清, 等. 1991. 中国岩石圈动力学概论[M]. 北京:地震出版社:142-153.
DING Guo-yu, CAI Wen bo, YU Ping qing, et al. 1991. Introduction to Lithospheric Dynamics of China[M]. Seismological Press, Beijing:142-153(in Chinese).
郭飚, 刘启元, 陈九辉, 等. 2004. 青藏高原NE缘-鄂尔多斯地壳上地幔地震层析成像研究［J］. 地球物理学报, 47(5):790-797.
GUO Biao, LIU Qi-yuan, CHEN Jiu-hui, et al. 2004. Seismic tomographic imaging of the crust and upper mantle beneath the northeastern edge of the Qinghai-Xizang plateau and the Ordos area［J］. Chinese Journal of Geophysics, 47(5):790-797(in Chinese).
范莉苹. 2014. 青藏高原东缘壳幔速度结构研究. 北京:中国地震局地球物理研究所.
FAN Li-ping. 2014. The velocity structure of the crust and mantle beneath the east margin of the Tibetan plateau. Institute of Geophysics, China Earthquake Administration, Beijing(in Chinese).
国家地震局地学断面编委会. 1992. 上海奉贤至内蒙古阿拉善左旗地学断面(1︰1 000 000附说明书)[M]. 北京:地震出版社.
The Geological Transect Editorial Board of State Seismological Bureau. 1992. The Geoscience Transect from Shanghai Fengxian to Inner Mongolia Alashan(Manual)[M]. Seismological Press, Beijing(in Chinese).
何正勤, 丁志峰, 叶太兰, 等. 2001. 中国大陆及其邻域地壳上地幔速度结构的面波层析成像研究［J］. 地震学报, 23(6):596-603.
HE Zheng-qin, DING Zhi-feng, YE Tai-lan, et al. 2001. Surface wave tomography of the crust and upper mantle of Chinese mainland［J］. Acta Seismologica Sinica, 23(6):596-603(in Chinese).
何正勤, 丁志峰, 叶太兰, 等. 2002. 中国大陆及其邻域的瑞利波群速度分布图像与地壳上地幔速度结构［J］. 地震学报, 24(3):252-259.
HE Zheng-qin, DING Zhi-feng, YE Tai-lan, et al. 2002. The group velocity distribution of Rayleigh waves and crustal and upper mantle velocity structure of the Chinese mainland and its vicinity［J］. Acta Seismologica Sinica, 24(3):252-259(in Chinese).
霍福臣, 潘行适, 尤国林, 等. 1989. 宁夏地质概论[M]. 北京:科学出版社.
HUO Fu-chen, PAN Hang-shi, YOU Guo-lin, et al. 1989. Introduction to Geology of Ningxia[M]. Science Press, Beijing(in Chinese).
李松林, 张先康, 张成科, 等. 2002. 玛沁-兰州-靖边地震测深剖面地壳速度结构的初步研究［J］. 地球物理学报, 45(2):210-217.
LI Song-lin, ZHANG Xian-kang, ZHANG Cheng-ke, et al. 2002. A preliminary study on the crustal velocity structure of Maqin-Lanzhou-Jingbian by means of deep seismic sounding profile［J］. Chinese Journal of Geophysics, 45(2):210-217(in Chinese).
刘建华, 刘福田, 吴华, 等. 1989. 中国南北带地壳和上地幔的三维速度图像［J］. 地球物理学报, 32(2):143-152.
LIU Jian-hua, LIU Fu-tian, WU Hua, et al. 1989. Three dimensional velocity images of the crust and upper mantle beneath North-South Zone in China［J］. Acta Geophysica Sinica, 32(2):143-152(in Chinese).
闵伟, 柴炽章, 王萍, 等. 1992. 罗山东麓断裂全新世活动特征的初步研究［J］. 中国地震, 8(4):49-54.
MIN Wei, CHAI Chi-zhang, WANG Ping, et al. 1992. Preliminary study on the Holocene active fault features at the eastern piedmont of the Luoshan Mountain［J］. Earthquake Research in China, 8(4):49-54(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. Annals of Regional Geology of Ningxia Hui Autonomous Region[M]. Geological Publishing House, Beijing(in Chinese).
彭艳菊, 苏伟, 郑月军, 等. 2002. 中国大陆及海域Love波层析成像［J］. 地球物理学报, 45(6):792-801.
PENG Yan-ju, SU Wei, ZHENG Yue-jun, et al. 2002. Love wave seismic tomography of China and vicinal sea areas［J］. Chinese Journal of Geophysics, 45(6):792-801(in Chinese).
汪一鹏, 宋方敏, 廖玉华, 等. 1986. 宁夏北部地震地质的若干特征兼论青藏高原对华北地壳应力场的影响[M]//国家地震局地质研究所. 现代地壳运动研究. 北京:地震出版社.
WANG Yi-peng, SONG Fang-min, LIAO Yu-hua, et al. 1986. The characteristics of seismostructures of northern Ningxia and the influence of the Qinghai-Tibet Plateau uplift on the crustal stress in North China[M]//Institute of Geology, State Seismological Bureau(ed). Reasearch on Recent Crustal Movement. Seismological Press, Beijing(in Chinese).
徐果明, 李光品, 王善恩, 等. 2000. 用瑞利面波资料反演中国大陆东部地壳上地幔横波速度的三维构造［J］. 地球物理学报, 43(3):366-376.
XU Guo-ming, LI Guang-pin, WANG Shan-en, et al. 2000. The 3-D structure of shear waves in the crust and mantle of east continental China inverted by Rayleigh wave data［J］. Chinese Journal of Geophysics, 43(3):366-376(in Chinese).
胥颐, 刘福田, 刘建华, 等. 2001. 中国NW大陆碰撞带的深部特征及其动力学意义. 地球物理学报, 44(1):40-47.
XU Yi, LIU Fu-tian, LIU Jian-hua, et al. 2001. Deep features of continental collision belts in northwestern China and their dynamic implications［J］. Chinese Journal of Geophysics, 44(1):40-47(in Chinese).
杨眀芝, 马禾青, 廖玉华. 2007. 宁夏地震活动与研究[M]. 北京:地震出版社.
YANG Ming-zhi, MA He-qing, LIAO Yu-hua. 2007. Ningxia Seismic Activity and Research[M]. Seismological Press, Beijing(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(S):12-20.
ZHANG Pei-zhen, DENG Qi-dong, ZHANG Guo-min, et al. 2003. Active tectonic blocks and strong earthquakes in the continent of China［J］. Science in China(Ser D), 46(S2):13-24.
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. Tianjingshan Active fault Zone[M]. Seismological Press, Beijing(in Chinese).
朱良保, 许庆, 陈晓非. 2002. 中国大陆及邻近海域的Rayleigh波群速度分布［J］. 地球物理学报, 45(4):475-482.
ZHU Liang-bao, XU Qing, CHEN Xiao-fei. 2002. Group velocity of Rayleigh wave in Chinese continent and its adjacent seas［J］. Chinese Journal of Geophysics, 45(4):475-482(in Chinese).
Ditmar P G, Yanovskaya T B. 1987. Generalization of the Backus-Gilbert method for estimation of lateral variations of surface wave velocity［J］. Izvestiya, Physics of the Solid Earth, 23(6):470-477.
Herrmann R B, Ammon C J. 2002. Computer programs in seismology. St Louis University, St Louis, Missouri.
Li Y H, Pan J T, Wu Q J, et al. 2014. Crustal and uppermost mantle structure of SE Tibetan plateau from Rayleigh-wave group-velocity measurements［J］. Earthquake Science, 27(4):411-419.
Mart'nez M D, Lana X, Olarte J, et al. 2000. Inversion of Rayleigh wave phase and group velocities by simulated annealing［J］. Physics of the Earth and Planetary Interiors, 122(1-2):3-17.
Shapiro N M, Ritzwoller M H. 2002. Monte-Carlo inversion for a global shear-velocity model of the crust and upper mantle［J］. Geophysical Journal International, 151(1):88-105. doi:10.1046/j.1365-246X.2002.017 42.x.
Wessel P, Smith W. 1998. New, improved version of generic mapping tools released［J］. EOS Transactions of the American Geophysical Union, 79, 579.
Yanovskaya T B, Ditmar P G. 1990. Smoothness criteria in surface wave tomography［J］. Geophysical Journal International, 102(1):63-72.

[1]	GONG Meng, LÜ Jian, ZHENG Yong, XIE Zu-jun, SHENG Shu-zhong, ZHANG Xing-mian. THREE-DIMENSIONAL S-WAVE VELOCITY DISTRIBUTION BASED ON AMBIENT NOISE ANALYSIS IN SOUTH CHINA BLOCK AND ITS ADJACENT AREAS [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 1011-1028.
[2]	WANG Ji-xin, RONG Mian-shui, FU Li-yun, FU Lei. JOINT INVERSION OF SITE VELOCITY STRUCTURE BY MICRO-TREMOR ARRAY RECORD: A CASE STUDY OF THE OBSER-VATION SITE 3^# OF XIANGTANG IN TANGSHAN [J]. SEISMOLOGY AND GEOLOGY, 2020, 42(6): 1335-1353.
[3]	KONG Xiang-yan, WU Jian-ping, FANG Li-hua, CAI Yan, FAN Li-ping, WANG Wei-lai. JOINT INVERSION OF SURFACE WAVE DISPERSION AND RECEIVER FUNCTIONS FOR CRUSTAL AND UPPERMOST MANTLE STRUCTURE BENEATH CHINESE TIENSHAN AND ITS ADJACENT AREAS [J]. SEISMOLOGY AND GEOLOGY, 2020, 42(4): 844-865.
[4]	FENG Hong-wu, YAN Wen-hua, YAN Shan, GUO Ying-xia, HUI Shao-xing, CHANG Cheng. JOINT INVERSION OF AMBIENT NOISE AND SURFACE WAVE FOR S-WAVE VELOCITY OF THE CRUST AND UPPERMOST MANTLE BENEATH WEIHE BASIN AND ITS ADJACENT AREA [J]. SEISMOLOGY AND GEOLOGY, 2019, 41(5): 1185-1205.
[5]	GONG Meng, XU Xi-wei, ZHANG Xin-dong, OUYANG Long-bin, JIANG Guo-yan, DONG Bo. THREE-DIMENSIONAL S-WAVE VELOCITY DISTRIBUTION BASED ON AMBIENT NOISE ANALYSIS IN EASTERN NORTH [J]. SEISMOLOGY AND GEOLOGY, 2017, 39(1): 130-146.
[6]	LUO Jia-hong, MA Wen-tao. A PRELIMINARY STUDY ON UPPER CRUSTAL VELOCITY STRUCTURE IN THE THREE GORGES RESERVOIR AREA [J]. SEISMOLOGY AND GEOLOGY, 2016, 38(2): 329-341.