渤海湾西北缘及其邻近地区地壳结构与构造特征
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摘要
对塘沽—玉田地震测深剖面资料进行二维处理、计算和综合解释研究,获得了渤海湾西北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,得知深浅部地质构造环境剖面具有层状结构特征,地壳厚度由南向北逐渐加厚,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.在渤海湾附近塘沽至宁河之间M界面有一斜坡带,地壳深度由塘沽的28km向北至宁河附近逐渐加深至31km.
DSS data of Tanggu-Yutian profile was processed,and the result obtained in this paper and the results of other five profiles,which cross this profile,were interpreted comprehensively in this paper.The purpose is to find out the basic features of 2-D velocity structures,spatial distribution of faults,geological structure of shallow and deep crust in the northwest margin of Bohai bay and adjacent area.The result shows that obvious layered structure appears along the profile,the crustal thickness increases gradually from south to north,and the crustal velocity structures in different region have obvious heterogeneity in the lateral and vertical directions.The Moho is a slope between Tanggu and Ninghe near Bohai bay.The crustal depth deepens gradually northward from 28 km in Tanggu to 31 km in Ninghe.
DSS data of Tanggu-Yutian profile was processed,and the result obtained in this paper and the results of other five profiles,which cross this profile,were interpreted comprehensively in this paper.The purpose is to find out the basic features of 2-D velocity structures,spatial distribution of faults,geological structure of shallow and deep crust in the northwest margin of Bohai bay and adjacent area.The result shows that obvious layered structure appears along the profile,the crustal thickness increases gradually from south to north,and the crustal velocity structures in different region have obvious heterogeneity in the lateral and vertical directions.The Moho is a slope between Tanggu and Ninghe near Bohai bay.The crustal depth deepens gradually northward from 28 km in Tanggu to 31 km in Ninghe.
引文
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[8]祝治平,张先康,张建狮等.北京—怀来—丰镇剖面地壳上地幔构造与速度结构研究.地震学报,1997,19(5):499～505Zhu Z P,Zhang X K,Zhang J S,et al.Study of crust-mantle tectonics and its velocity structure of Beijing-Huailai-Fengzhen profile.Acta Seismologica Sinica(in Chinese),1997,19(5):499～505
[9]王夫运,张先康,陈颙等.张渤构造带中东段二维P波速度结构——安新—香河—宽城剖面.地震学报,2004,26(增刊):31～41Wang F Y,Zhang X K,Chen Y,et al.2-D P-wave velocity structure in the mideast segment of Zhangjiakou-Bohai tectonic zone:Anxin-Xianghe-Kuancheng DSS Profile.Acta Seismologica Sinica(in Chinese),2004,26(Suppl.):31～41
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[12]张成科,张先康,盖玉杰等.文安—蔚县—察右中旗剖面地壳上地幔构造与速度的研究.华北地震科学,1997,15(3):18～28Zhang C K,Zhang X K,Gai YJ,et al.Study of crust-mantle tectonics andits velocity structure of Wenan-Weixian-Chayou profile.North China Earthquake Science(in Chinese),1997,15(3):18～28
[13]嘉世旭,张先康.华北不同构造块体地壳结构及其对比研究.地球物理学报,2005,48(3):611～620Jia S X,Zhang X K.Crustal structure and comparison of different tectonic blocks in North China.Chinese J.Geophys.(in Chinese),2005,48(3):611～620
[14]嘉世旭,齐诚,王夫运等.首都圈地壳网格化三维结构.地球物理学报,2005,48(6):1316～1324Jia S X,Qi C,Wang F Y,et al.Three-dimensional crustal gridded structure of the Capital area.Chinese J.Geophys.(in Chinese),2005,48(6):1316～1324
[15]嘉世旭,刘昌铨.华北地区人工地震测深震相与地壳结构研究.地震地质,1995,17(2):97～105Jia S X,Liu C Q.Study onthe seismic phase of DSS and crust structure in North China.Seismology and Geology(in Chinese),1995,17(2):97～105
[16]国家地震局科技监测司编.中国大陆深部构造的研究与进展.北京:地质出版社,1988.18～46Deparpment of Scientific Programming and Earthquake Monitoring.Developments in the Research of Deep Structures of China′s Continent(in Chinese).Beijing:Geological Publishing House,1988.18～46
[17]Michel B,Hirn A.Velocity-depth estimationfrom wide angle seismic reflection arrivals.Annals de Geophysique,1980,36(1):107～118
[18]张四昌,赵军,刁桂苓.华北地区震源断层与深浅构造关系的初步研究.华北地震科学,1995,13(3):1～9Zhang S C,Zhao J,Diao G L.Study relationship focal faults and depth shallow tectonics in North China.North China Earthquake Science(in Chinese),1995,13(3):1～9
[19]张志刚,吴景春.怀来及邻近地区地震活动和地震危险性研究.华北地震科学,1989,7(4):91～97Zhang Z G,Wu J C.Astudy of seismictiy and seismic riskin Huailai andits adjacent.North China Earthquake Science(in Chinese),1989,7(4):91～97
[20]Cerveny V.Ray theoretical seismograms for laterally inhomogenous structure.J Geophys,1979,46:335～342
[21]王帅军,张先康,张成科等.武清—北京—赤城二维地壳结构和构造.地球物理学报,2007,50(6):1769～1777Wang S J,Zhang X K,Zhang C K,et al.2-D crustal structures along Wuqing-Beijing-Chicheng deep seismic sounding profile.Chinese J.Geophys.(in Chinese),2007,50(6):1769～1777
[22]赖院根,刘启元,陈九辉等.首都圈地区横波分裂与地壳应力场特征.地球物理学报,2006,49(1):189～196Lai Y G,Liu Q Y,Chen J H,et al.Shear wave splitting and the features of the crustal stress field in the Capital Circle.Chinese J.Geophys.(in Chinese),2006,49(1):189～196
[23]胥颐,刘建华,郝天珧等.中国东部海域及邻区岩石层地幔的P波速度结构与构造分析.地球物理学报,2006,49(4):1053～1061Xu Y,Liu J H,Hao T Y,et al.P wave velocity structure and tectonics analysis of lithospheric mantle in eastern China seas and adjacent regions.Chinese J.Geophys.(in Chinese),2006,49(4):1053～1061
[2]刘国栋,史书林,王宝均.华北地区高导层及其地壳构造活动性的关系.中国科学(B辑),1984,(9):839～848Liu G D,Shi S L,Wang B J.Relationship between crustal high-conductivity layers and crustal tectonic activities.Science in China(Series B)(in Chinese),1984,(9):839～848
[3]马杏垣主编.中国岩石圈动力学地图集.北京:中国地图出版社,1989Ma X Y(ed).Lithospheric Dynamics Atlas of China(in Chinese).Beijing:China Cartographic Publishing House,1989
[4]徐杰,宋长清,楚全芝.张家口—蓬莱断裂带地震构造特征的初步探讨.地震地质,1998,20(2):125～134Xu J,Song C Q,Chu Q Z.Preliminary study on the seismotectonic characters of the Zhangjiakou-Penglai Fault zone.Seismology and Geology(in Chinese),1998,20(2):125～134
[5]王俊国,姚兰予,卞真付等.2003年宁河地震序列特征的分析.地震,2004,24(2):103～108Wang J G,Yao L Y,Bian Z F,et al.Analysis on the characteristics of Ninghe earthquake sequence occurred in2003.Earthquake(in Chinese),2004,24(2):103～108
[6]张先康,祝治平,张成科等.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:活动断裂研究编委会和中国地震局科技发展司编,活动断裂研究(6).北京:地震出版社,1998,1～16Zhang X K,Zhu Z P,Zhang C K,et al.Crust and upper mantle structure of the Zhangjiakou-Bohai sea seismic zone.in:Editorial Board of Research on Active Fault and Depart ment of Seismic Programming,State Seismological Bureau eds.Research on Active Fault(in Chinese)(6).Beijing:Seismological Press,1998,1～16
[7]张成科,张先康,赵金仁等.渤海湾及其邻区壳幔速度结构研究与综述.地震学报,2002,24(4):428～435Zhang C K,Zhang X K,Zhao J R,et al.Study and review on crust-mantle velocity structure in Bohai Bay and its adjacent areas.Acta Seismologica Sinica(in Chinese),2002,24(4):428～435
[8]祝治平,张先康,张建狮等.北京—怀来—丰镇剖面地壳上地幔构造与速度结构研究.地震学报,1997,19(5):499～505Zhu Z P,Zhang X K,Zhang J S,et al.Study of crust-mantle tectonics and its velocity structure of Beijing-Huailai-Fengzhen profile.Acta Seismologica Sinica(in Chinese),1997,19(5):499～505
[9]王夫运,张先康,陈颙等.张渤构造带中东段二维P波速度结构——安新—香河—宽城剖面.地震学报,2004,26(增刊):31～41Wang F Y,Zhang X K,Chen Y,et al.2-D P-wave velocity structure in the mideast segment of Zhangjiakou-Bohai tectonic zone:Anxin-Xianghe-Kuancheng DSS Profile.Acta Seismologica Sinica(in Chinese),2004,26(Suppl.):31～41
[10]张先康,赵金仁,刘国华等.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.中国地震,2002,18(4):326～336Zhang X K,Zhao J R,Liu G H,et al.Study on fine crustal structure of the Sanhe-Pinggu earthquake(M8.0)region by deep seismic reflection profiling.Earthquake Research in China(in Chinese),2002,18(4):326～336
[11]赵金仁,张先康,张成科等.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.地球物理学报,2004,47(4):646～653Zhao J R,Zhang X K,Zhang C K,et al.Deep structural features of the Sanhe-Pingu great earthquake area imaged by wide-angle and deep seismic reflection profiling.Chinese J.Geophys.(in Chinese),2004,47(4):646～653
[12]张成科,张先康,盖玉杰等.文安—蔚县—察右中旗剖面地壳上地幔构造与速度的研究.华北地震科学,1997,15(3):18～28Zhang C K,Zhang X K,Gai YJ,et al.Study of crust-mantle tectonics andits velocity structure of Wenan-Weixian-Chayou profile.North China Earthquake Science(in Chinese),1997,15(3):18～28
[13]嘉世旭,张先康.华北不同构造块体地壳结构及其对比研究.地球物理学报,2005,48(3):611～620Jia S X,Zhang X K.Crustal structure and comparison of different tectonic blocks in North China.Chinese J.Geophys.(in Chinese),2005,48(3):611～620
[14]嘉世旭,齐诚,王夫运等.首都圈地壳网格化三维结构.地球物理学报,2005,48(6):1316～1324Jia S X,Qi C,Wang F Y,et al.Three-dimensional crustal gridded structure of the Capital area.Chinese J.Geophys.(in Chinese),2005,48(6):1316～1324
[15]嘉世旭,刘昌铨.华北地区人工地震测深震相与地壳结构研究.地震地质,1995,17(2):97～105Jia S X,Liu C Q.Study onthe seismic phase of DSS and crust structure in North China.Seismology and Geology(in Chinese),1995,17(2):97～105
[16]国家地震局科技监测司编.中国大陆深部构造的研究与进展.北京:地质出版社,1988.18～46Deparpment of Scientific Programming and Earthquake Monitoring.Developments in the Research of Deep Structures of China′s Continent(in Chinese).Beijing:Geological Publishing House,1988.18～46
[17]Michel B,Hirn A.Velocity-depth estimationfrom wide angle seismic reflection arrivals.Annals de Geophysique,1980,36(1):107～118
[18]张四昌,赵军,刁桂苓.华北地区震源断层与深浅构造关系的初步研究.华北地震科学,1995,13(3):1～9Zhang S C,Zhao J,Diao G L.Study relationship focal faults and depth shallow tectonics in North China.North China Earthquake Science(in Chinese),1995,13(3):1～9
[19]张志刚,吴景春.怀来及邻近地区地震活动和地震危险性研究.华北地震科学,1989,7(4):91～97Zhang Z G,Wu J C.Astudy of seismictiy and seismic riskin Huailai andits adjacent.North China Earthquake Science(in Chinese),1989,7(4):91～97
[20]Cerveny V.Ray theoretical seismograms for laterally inhomogenous structure.J Geophys,1979,46:335～342
[21]王帅军,张先康,张成科等.武清—北京—赤城二维地壳结构和构造.地球物理学报,2007,50(6):1769～1777Wang S J,Zhang X K,Zhang C K,et al.2-D crustal structures along Wuqing-Beijing-Chicheng deep seismic sounding profile.Chinese J.Geophys.(in Chinese),2007,50(6):1769～1777
[22]赖院根,刘启元,陈九辉等.首都圈地区横波分裂与地壳应力场特征.地球物理学报,2006,49(1):189～196Lai Y G,Liu Q Y,Chen J H,et al.Shear wave splitting and the features of the crustal stress field in the Capital Circle.Chinese J.Geophys.(in Chinese),2006,49(1):189～196
[23]胥颐,刘建华,郝天珧等.中国东部海域及邻区岩石层地幔的P波速度结构与构造分析.地球物理学报,2006,49(4):1053～1061Xu Y,Liu J H,Hao T Y,et al.P wave velocity structure and tectonics analysis of lithospheric mantle in eastern China seas and adjacent regions.Chinese J.Geophys.(in Chinese),2006,49(4):1053～1061
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