CRUSTAL STRUCTURE AND ITS FEATURES IN THE SOUTHWEST MARGIN OF BOHAI BAY AND ADJACENT AREAS

doi:10.3969/j.issn.0253-4967.2013.02.007

Abstract

Abstract:

DSS data of Bohai Bay profile was processed in August 2011 and the result obtained in this paper and the results of other profiles,which cross this profile,were interpreted comprehensively in this paper. The DSS data were calculated and interpreted synthetically using 1-D and 2-D processing techniques in order to find out the basic features of 2-D velocity structures,spatial distribution of faults,geological structure of shallow and deep crust in the southwest margin of Bohai Bay and adjacent areas. The result shows that obvious layered structure appears along the profile,and the crustal velocity structures in different regions have obvious heterogeneity in the lateral and vertical directions. The crystalline basement near the Bohai Bay is gradually thinning southwestwards,and beneath the 220km Stake,the depth of G interface is 7.4km. The thickness of the middle layer varies greatly,with the change range up to 4.0km. The crustal depth varies relatively moderately,with a change range of about 2.0km. The Moho deepens gradually from coastal area to the inland along the southwest direction.

Key words: deep seismic sounding, velocity structure, crust, Bohai Bay

摘要：

利用2011年8月在渤海湾的探测剖面资料及其周缘地震测深剖面的结果,对渤海湾探测剖面的数据资料进行一、二维处理,计算和综合解释研究,获得了渤海湾西南缘及其邻近地区二维地壳速度结构和构造的基本特征、断层的空间展布特征和深浅部地质构造环境等.研究结果表明,沿剖面具有明显的层状结构,不同区域的地壳速度结构在纵向和横向上均具有明显的非均匀性.基底厚度由渤海湾附近向SW方向逐渐减薄,在220km桩号下方G界面的埋深为7.4km.中间层厚度变化较大,变化幅度达4.0km.莫霍面由沿海向SW方向逐渐加深,变化幅度为2.0km左右.

关键词: 地震测深, 速度结构, 地壳, 渤海湾

CLC Number:

P313

WANG Shuai-jun, WANG Fu-yun, ZHANG Jian-shi, ZHENG Yan-peng, ZHANG Cheng-ke, ZHAO Jin-ren, LIU Bao-feng, Huang Can. CRUSTAL STRUCTURE AND ITS FEATURES IN THE SOUTHWEST MARGIN OF BOHAI BAY AND ADJACENT AREAS[J]. SEISMOLOGY AND GEOLOGY, 2013, 35(2): 278-289.

王帅军, 王夫运, 张建狮, 郑彦鹏, 张成科, 赵金仁, 刘宝峰, 黄灿. 渤海湾西南缘及其邻近地区地壳结构特征[J]. 地震地质, 2013, 35(2): 278-289.

References

国家地震局科技监测司编.1988.中国大陆深部构造的研究与进展［M］.北京: 地质出版.18—46.
Department of Scientific Programming and Earthquake Monitoring, State Seismological Bureau.1988.Developments in the Research of Deep Structures of China^,s Continent ［M］.Geological Publishing House,Beijing.18—46(in Chinese).
嘉世旭,张先康.2005a.华北不同构造块体地壳结构及其对比研究［J］.地球物理学报,48(3): 611—620.
JIA Shi-xu,ZHANG Xian-kang.2005a.Crustal structure and comparison of different tectonic blocks in North China ［J］.Chinese J Geophys,48(3): 611—620(in Chinese).
嘉世旭,齐诚,王夫运,等.2005b.首都圈地壳网格化三维结构［J］.地球物理学报,48(6): 1316—1324.
JIA Shi-xu,QI Cheng,WANG Fu-yun,et al.2005b.Three-dimensional crustal gridded structure of the Capital area ［J］.Chinese J Geophys,48(6): 1316—1324(in Chinese).
嘉世旭,刘昌铨.1995.华北地区人工地震测深震相与地壳结构研究［J］.地震地质,17(2): 97—105.
JIA Shi-xu,LIU Chang-quan.1995.Study on the seismic phase of DSS and crust structure in North China ［J］.Seismology and Geology,17(2): 97—105(in Chinese).
赖院根,刘启元,陈九辉,等.2006.首都圈地区横波分裂与地壳应力场特征［J］.地球物理学报,49(1): 189—196.
LAI Yuan-gen,LIU Qi-yuan,CHEN Jiu-hui,et al.2006.Shear wave splitting and the features of the crustal stress field in the Capital Circle ［J］.Chinese J Geophys,49(1): 189—196(in Chinese).
刘国栋,史书林,王宝均.1984.华北地区高导层及其地壳构造活动性的关系［J］.中国科学(B辑),(9): 839—848.
LIU Guo-dong,SHI Shu-lin,WANG Bao-jun.1984.Relationship between crustal high-conductivity layers and crustal tectonic activities ［J］.Science in China(Ser B),(9): 839—848(in Chinese).
马杏垣主编.1989.中国岩石圈动力学地图集［Z］.北京: 中国地图出版社.
MA Xing-yuan(ed).1989.Lithospheric Dynamics Atlas of China ［Z］.China Cartographic Publishing House,Beijing(in Chinese).
王夫运,张先康,陈颙,等.2004.张渤构造带中东段二维P波速度结构: 安新—香河—宽城剖面［J］.地震学报,26(增刊): 31—41.
WANG Fu-yun,ZHANG Xian-kang,CHEN Yong,et al.2004.2-D P-wave velocity structure in the mid-east segment of Zhangjiakou-Bohai tectonic zone: Anxin-Xianghe-Kuancheng DSS profile ［J］.Acta Seismologica Sinica,26(Suppl): 31—41(in Chinese).
王俊国,姚兰予,卞真付,等.2004.2003年宁河地震序列特征的分析［J］.地震,24(2): 103—108.
WANG Jun-guo,YAO Lan-yu,BIAN Zhen-fu,et al.2004.Analysis on the characteristics of Ninghe earthquake sequence occurred in 2003 ［J］.Earthquake,24(2): 103—108(in Chinese).
王帅军,张先康,方盛明,等.2008.渤海湾西北缘及其邻近地区地壳结构与构造特征［J］.地球物理学报,51(5): 1451—1458.
WANG Shuai-jun,ZHANG Xian-kang,FANG Sheng-ming,et al.2008.Crustal structure and its features in the northwest margin of Bohai Bay and adjacent areas ［J］.Chinese J Geophys,51(5): 1451—1458.
王帅军,张先康,刘宝峰,等.2005.张渤地震构造带中西段及邻近地区地壳深部构造探测研究［J］.大地测量与地球动力学,25(3): 110—115.
WANG Shuai-jun,ZHANG Xian-kang,LIU Bao-feng,et al.2005.Sounding research on deep crust tectonics in mid-west segment and its adjacent region of Zhangjiakou-Bohai seismic zone ［J］.Journal of Geodesy and Geodynamics,25(3): 110—115.
王帅军,张先康,张成科,等.2007.武清-北京-赤城二维地壳结构和构造［J］.地球物理学报,50(6): 1769—1777.
WANG Shuai-jun,ZHANG Xian-kang,ZHANG Cheng-ke,et al.2007.2-D crustal structures along Wuqing-Beijing-Chicheng deep seismic sounding profile ［J］.Chinese J Geophys,50(6):149—155.
徐杰,宋长清,楚全芝.1998.张家口-蓬莱断裂带地震构造特征的初步探讨［J］.地震地质,20(2): 125—134.
XU Jie,SONG Chang-qing,CHU Quan-zhi.1998.Preliminary study on the seismotectonic characters of the Zhangjiakou-Penglai Fault zone ［J］.Seismology and Geology,20(2): 125—134(in Chinese).
胥颐,刘建华,郝天珧,等.2006.中国东部海域及邻区岩石圈地幔的P波速度结构与构造分析［J］.地球物理学报,49(4): 1053—1061.
XU Yi,LIU Jian-hua,HAO Tian-yao,et al.2006.P wave velocity structure and tectonics analysis of lithospheric mantle in eastern China seas and adjacent regions ［J］.Chinese J Geophys,49(4): 1053—1061(in Chinese).
张成科,张先康,盖玉杰,等.1997.文安—蔚县—察右中旗剖面地壳上地幔构造与速度的研究［J］.华北地震科学,15(3): 18—28.
ZHANG Cheng-ke,ZHANG Xian-kang,GAI Yu-jie,et al.1997.Study of crust-mantle tectonics and its velocity structure of Wen'an-Weixian-Chayou profile ［J］.North China Earthquake Science,15(3): 18—28(in Chinese).
张成科,张先康,赵金仁,等.2002.渤海湾及其邻区壳幔速度结构研究与综述［J］.地震学报,24(4): 428—435.
ZHANG Cheng-ke,ZHANG Xian-kang,ZHAO Jin-ren,et al.2002.Study and review on crust-mantle velocity structure in Bohai Bay and its adjacent areas ［J］.Acta Seismologica Sinica,24(4): 428—435(in Chinese).
张四昌,赵军,刁桂苓.1995.华北地区震源断层与深浅构造关系的初步研究［J］.华北地震科学,13(3): 1—9.
ZHANG Si-chang,ZHAO Jun,DIAO Gui-ling.1995.A study on the relationship between focal faults and deep and shallow tectonics in North China ［J］.North China Earthquake Science,13(3): 1—9(in Chinese).
张先康,赵金仁,刘国华,等.2002.三河-平谷8.0级大震区震源细结构的深地震反射探测研究［J］.中国地震,18(4): 326—336.
ZHANG Xian-kang,ZHAO Jin-ren,LIU Guo-hua,et al.2002.Study on fine crustal structure of the Sanhe-Pinggu earthquake(M8.0)region by deep seismic reflection profiling ［J］.Earthquake Research in China,18(4): 326—336(in Chinese).
张先康,祝治平,张成科,等1998.张家口-渤海地震带及其两侧地壳上地幔构造与速度结构研究 .见: 国家地震局地质研究所编.活动断裂研究(6).北京: 地震出版社.1—16.
ZHANG Xian-kang,ZHU Zhi-ping,ZHANG Cheng-ke,et al.1998.Crust and upper mantle structure of the Zhangjiakou-Bohai Sea seismic zone .In: Institute of Geology,State Seismological Bureau(ed).Research on Active Fault(6).Seismological Press,Beijing.1—16(in Chinese).
张友南,孙君秀.1998.华北地壳岩石速度类型及其地质意义［J］.地震地质,20(1): 74—80.
ZHANG You-nan,SUN Jun-xiu.1998.Rock wave velocity types in the crust of North China and its geological implications ［J］.Seismology and Geology,20(1): 74—80(in Chinese).
张志刚,吴景春.1989.怀来及邻近地区地震活动和地震危险性研究［J］.华北地震科学,7(4): 91—97.
ZHANG Zhi-gang,WU Jing-chun.1989.A study of seismicity and seismic risk in Huailai and its adjacent regions ［J］.North China Earthquake Science,7(4): 91—97(in Chinese).
赵金仁,张先康,张成科,等.2004.利用宽角反射/折射和深反射探测剖面揭示三河-平谷大震区深部结特征［J］.地球物理学报,47(4): 646—653.
ZHAO Jin-ren,ZHANG Xian-kang,ZHANG Cheng-ke,et al.2004.Deep structural features of the Sanhe-Pinggu great earthquake area imaged by wide-angle and deep seismic reflection profiling ［J］.Chinese J Geophys,47(4): 646—653(in Chinese).
祝治平,张先康,张建狮,等.1997.北京-怀来-丰镇剖面地壳上地幔构造与速度结构研究［J］.地震学报,19(5): 499—505.
ZHU Zhi-ping,ZHANG Xian-kang,ZHANG Jian-shi,et al.1997.Study of crust-mantle tectonics and its velocity structure of Beijing-Huailai-Fengzhen profile ［J］.Acta Seismologica Sinica,19(5): 499—505(in Chinese).
Cerveny V.1979.Ray theoretical seismograms for laterally inhomogeneous structure ［J］.J Geophys,46: 335—342.
Mecbie J,Egorkin A V,Fuchs K,et al.1993.P-wave mantle velocity structure beneath northern Eurasia from long-range recordings along the profile Quartz ［J］.Phys Earth Planet Inter,79: 269—286.
Michel B,Hirn A.1980.Velocity-depth estimation from wide angle seismic reflection arrivals ［J］.Annals de Geophysique,36(1): 107—118.
Ryberg T,Fuchs K,Egorkin A V,et al.1995.Observation of high-frequency teleseismic Pn on the long-range Quartz profile across northern Eurasia ［J］.J Geophys Res,100(B9): 18151—18163.
Robert B Y, Asse M P.1973.Compressional velocity distribution beneath central and eastern north America ［J］.Bull Seismol Soc Am,63(3): 911—935.
Wang S Y,Xu Z H,Pei S P.2003.Velocity structure of uppermost mantle beneath North China from Pn tomography and geological structure ［J］.Sci China Ser D-Earth Sci 2003,33(Suppl): 91—98(in Chinese).
Zheng T,Zhao L,Zhu R X. 2008.Insight into the geodynamics of cratonic reactivation from seismic analysis of the crust-mantle boundary ［J］.Geophys Res Lett,35: 108303.
Zheng T Y,Zhao L,Zhu R X.2008.New evidence from seismic imaging for subduction during assembly of the North China Craton ［J］.Geology, 37: 395—398.doi: 10.1130/G25600A.1.
Zheng T Y,Chen L,Zhao L,et al. 2007.Crustal structure across the Yanshan belt at the northern margin of the North China Craton ［J］.Physics of the Earth Planetary Interiors,161(1-2): 36—49.

[1]	YANG Jian-wen, JIN Ming-pei, CHA Wen-jian, ZHANG Tian-ji, YE Beng. CRUSTAL S-WAVE VELOCITY STRUCTURE BENEATH THE XIAO-JIANG FAULT ZONE AND ADJACENT REGIONS REVEALED BY TWO-STEP INVERSION METHOD OF RECEIVER FUNCTIONS [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(1): 190-207.
[2]	LEI Hui-ru, ZHOU Yong-sheng. EMPIRICAL QUANTITATIVE ANALYSIS OF STRENGTH AND SEISMOGENIC DEPTHS FOR THE BRITTLE-DUCTILE TRANSITION OF CONTINENTAL FAULT ZONE [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(1): 29-48.
[3]	LI Qian, FENG Shao-ying, QIN Jing-jing, TIAN Yi-ming. STUDY ON FINE CRUSTAL STRUCTURE OF THE SANHE-PINGGU EARTHQUAKE REGION BY HIGH-RESOLUTION SPECTRAL DECOMPOSITION METHOD [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(5): 1257-1272.
[4]	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.
[5]	LI Qian, SONG Qian-jin, FENG Shao-ying, JI Ji-fa, DUAN Yong-hong, HE Yin-juan, QIN Jing-jing. DEEP STRUCTURES OF THE MIDDLE-SOUTHERN SEGMENT OF LANLIAO FAULT ZONE REVEALED BY DEEP SEISMIC REFLECTION PROFILE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 1029-1045.
[6]	HAO Hong-tao, WANG Qing-hua, ZHANG Xin-lin, WEI Jin, WU Gui-ju, HU Min-zhang. A STUDY ON LONG-TERM GRAVITY VARIATION AND ITS MECHANISM IN THE WESTERN YUNNAN EARTHQUAKE PREDICTION STUDY AREA [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 876-894.
[7]	WANG Xiao-shan, WAN Yong-ge. CHARACTERISTICS OF THE CRUSTAL STRESS FIELD AND ITS DIRECTION CONVERGENCE BEFORE THE WENCHUAN EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 363-377.
[8]	WANG Liang, JIAO Ming-ruo, QIAN Rui, ZHANG Bo, YANG Shi-chao, SHAO Yuan-yuan. CRUSTAL VELOCITY STRUCTURE BENEATH THE SOUTHERN LIAONING PROVINCE DERIVED FROM DOUBLE DIFFERENCE TOMOGRAPHY [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 378-394.
[9]	LI Cui-ping, TANG Mao-yun, GUO Wei-ying, WANG Xiao-long, DONG Lei. A PRELIMINARY STUDY ON 3D VELOCITY STRUCTURE OF RONGCHANG AND ITS ADJACENT AREA [J]. SEISMOLOGY AND EGOLOGY, 2022, 44(1): 205-219.
[10]	SHI Lei, LI Yong-hua, ZHANG Rui-qing. THE GRAVITY ISOSTATIC CHARACTERISTICS OF THE EPICENTER AND ITS SURROUNDING REGIONS OF THE YANGBI M_S6.4, YUNNAN EARTHQUAKE [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(5): 1140-1156.
[11]	FANG Dong, HU Min-zhang, HAO Hong-tao. MULTI-SCALE ANALYSIS OF THE GRAVITY FIELD IN THE SOUTHEASTERN QINGHAI-TIBET PLATEAU AND ITS TECTONIC IMPLICATIONS [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(5): 1208-1232.
[12]	PAN Ji-shun, LI Peng-hui, DUAN Yong-hong, ZHAO Yan-na, PENG Yi-cong, SUN Kai-xuan. STUDY ON THE CRUSTAL STRUCTURE OF THE CENTRAL AND WESTERN PART OF THE NORTH CHINA CRATON [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(5): 1269-1291.
[13]	ZHANG Zhi-bin, LIANG Xiao-feng, ZHOU Bei-bei, LIU Dai-qin, TANG Ming-shuai. THREE-DIMENSIONAL SEISMIC VELOCITY STRUCTURE OF THE MIDDLE PART OF NORTH TIANSHAN MOUNTAINS, XINJIANG BASED ON SEISMIC RELOCATION AND LOCAL SEISMIC TOMOGRAPHY [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(5): 1292-1310.
[14]	SONG Xiang-hui, WANG Shuai-jun, PAN Su-zhen, SONG Jia-jia. DEEP SEISMOTECTONIC ENVIRONMENT OF THE 2021 MADOI M_S7.4 EARTHQUAKE [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(4): 757-770.
[15]	YIN Xin-xin, JIANG Chang-sheng, CAI Run, GUO Xiang-yun, JIANG Cong, WANG Zu-dong, ZOU Xiao-bo. STUDY OF CRUSTAL TOMOGRAPHY AND PRECISE EARTHQUAKE LOCATION IN YANGBI AREA, YUNNAN PROVINCE [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(4): 864-880.