渤海盆地现代构造应力场与强震活动
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摘要
渤海位于北华北新生代裂陷盆地的东部 ,是一个晚第四纪形成的内陆海盆 .渤海盆地活动断裂发育 ,地震活动强烈 ,交会于渤海中部的NE向营口—潍坊断裂带北段、庙西北—黄河口—临邑断裂带及NW向北京—蓬莱断裂带是主要的活动构造带 ,将海区分成 4个次级新构造区 ,成为现代应力场作用的构造基础 .综合研究 38个震源机制解和 75个井区应力场等资料 ,以及构造应力场二维数值模拟计算结果表明 ,渤海及其邻区现代构造应力场的压应力方向为NE6 0°～ 90° ,张应力为SN—NW30° ;以水平和近水平应力作用为主 ;不同构造区主应力方向存在一定的差异 .现今渤海地区地壳发育以NNE—NE和NW—WNW走向的共轭剪切破裂为特征 ,是控制地震活动的主要构造
The Bohai Sea basin is located in the east to the Cenozoic rift basin of North China. It is a inner-land sea basin formed during Late Quaternary time. In this basin there are numerous active faults and many major earthquakes have occurred. Its major active tectonic zones are the northern section of the NE trending Yingkou-Weifang fault zone,Miaoxibei-Huanghekou-Linyi fault zone,and NW striking Beijing-Penglai fault zone,which intersect at the center of the Bohai Sea basin. These tectonic zones subdivide the sea area into four secondary neotectonic areas,which are subject to the recent tectonic stress field. Using the data of 38 focal plane solutions and 75 drill stress measurements,and the result of numerical modeling,we analyze the recent tectonic stress field of this region. Our result shows that this stress field is characterized by dominant horizontal or nearly horizontal stress. Its compressive stress is in the direction NE60°～90°,and the tensional stress is in NS—NW30°. There are some differences of principal stress between secondary tectonic areas. A remarkable feature of the Bohai Sea basin is a conjugate shear rupture zone,which develops in the crust and is the major seismogenic structure.
The Bohai Sea basin is located in the east to the Cenozoic rift basin of North China. It is a inner-land sea basin formed during Late Quaternary time. In this basin there are numerous active faults and many major earthquakes have occurred. Its major active tectonic zones are the northern section of the NE trending Yingkou-Weifang fault zone,Miaoxibei-Huanghekou-Linyi fault zone,and NW striking Beijing-Penglai fault zone,which intersect at the center of the Bohai Sea basin. These tectonic zones subdivide the sea area into four secondary neotectonic areas,which are subject to the recent tectonic stress field. Using the data of 38 focal plane solutions and 75 drill stress measurements,and the result of numerical modeling,we analyze the recent tectonic stress field of this region. Our result shows that this stress field is characterized by dominant horizontal or nearly horizontal stress. Its compressive stress is in the direction NE60°～90°,and the tensional stress is in NS—NW30°. There are some differences of principal stress between secondary tectonic areas. A remarkable feature of the Bohai Sea basin is a conjugate shear rupture zone,which develops in the crust and is the major seismogenic structure.
引文
①中国地震局地质研究所.1999.渤海晚第三纪以来构造应力场与断裂活动关系及其在油气勘探开发中的应用.
中国地震局地质研究所.1999.渤海晚第三纪以来构造应力场与断裂活动关系及其在油气勘探开发中的应用.
中国地震局地质研究所、中国石油天然气总公司大港石油管理局.1991.大港油田现代构造应力场及其与井网布置的关系.
中国地震局地质研究所.2003.辽河大民屯凹陷潜山裂缝发育特征及其与油气成藏关系研究.
①中国地震局地质研究所.1999.渤海晚第三纪以来构造应力场与断裂活动关系及其在油气勘探开发中的应用.
①中国地震局地质研究所.1999.渤海晚第三纪以来构造应力场与断裂活动关系及其在油气勘探开发中的应用.
陈国光,徐杰,高战武.2003.北华北盆地大震的构造特征[J].华北地震科学,21(2):7～15
丁健民,梁国平.1985.唐山、天津和沧州地区的油井水力压裂应力测量[J].地震学报,7(4):363～373
丁健民,梁国平,郭启良.1986.山东渤海沿岸地区深部应力测量主应力方向的测定[J].地震学刊,(1):1～9
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邓起东,闵伟,晁洪太,等.2001.渤海地区新生代构造与地震活动[A].见:卢演畴等主编.新构造与环境[C].北京:地震出版社,218～233
邓远华.2002.渤海油气勘探历程回顾[J].中国海上油气(地质),16(2):98～101
高战武,徐杰,宋长青,等.2000.华北沧东断裂的构造特征[J].地震地质,22(4):125～133
环文林,汪素云,常向东,等.1989.渤海地震活动特征[J].地震研究,12(1):1～10
黄福林,胡连英,徐学思,等.1993.中国海新构造特征[J].海洋地质与第四纪地质,13(增刊):1～34
卢造勋,姜秀琴,白云,等.1999.胶辽渤海地区地壳上地幔结构特征与介质的横向非均匀性[J].华北地震科学,17(2):43～51
魏光兴,周翠英,赵兴兰.1982.华北地区中小地震应力场的优势方向[J].地球物理学报,5(4):333～343
魏光兴,周翠英,胡政,等.1988.沂沭断裂带现代构造应力场及震源错动性质[J].中国地震,4(3):96～101
王强,李凤林.1983.渤海湾西岸第四纪海陆变迁[J].海洋地质与第四纪地质,3(4):83～90
徐杰,牛娈芳,王春华,等.1996.唐山—河间—磁县新生地震构造带[J].地震地质,18(3):193～198
徐杰,宋长青,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):146～154
徐杰,宋长青,高占武.1999.营口—潍坊断裂带新生代活动的特征[J].地震地质,21(4):289～300
徐杰,马宗晋,高战武,等.2002.渤海湾盆地的一些重要构造特征[A].见:中国石油学会地质专业委员会编.油气盆地研究新进展.第一辑[C].北京:石油工业出版社,170～179
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
周翠英,周焕鹏,李人杰.1990.渤海及其周围地区现代构造应力场特征[J].地震学刊,(3):18～25
中国科学院海洋研究所海洋地质研究室.1985.渤海地质[M].北京:科学出版社,191～222
BellJS ,GoughDI .1979.NortheastSouthwestcompressivestressinAlberta:Evidencefromoilwells[J].EarthandPlanetaryScienceLetters,45:475～482
XuJie,GaoZhanwu,SongChangqing,etal.2001a.StructuralcharcteristicsoftheTaihangshanpiedmontfaultzone[J].SeientiaGeo logicaSinica,10(1):51～69
XuJie,GaoZhanwu,SongChangqing.2001b.NewlygeneratedseismotectoniczonesinNorthChinaanditsregionalseismotectonicframework[J].ScientiaGeologicaSinica,10(3):159～168
XuJie,GaoZhanwu,SunJianbao,etal.2001c.Apreliminarystudyongeologicalandseismogenicstructuresintheregionof1969M7.4BohaiSeaearthquake[J].EarthquakeResearchinChina,15(4):365～379
中国地震局地质研究所.1999.渤海晚第三纪以来构造应力场与断裂活动关系及其在油气勘探开发中的应用.
中国地震局地质研究所、中国石油天然气总公司大港石油管理局.1991.大港油田现代构造应力场及其与井网布置的关系.
中国地震局地质研究所.2003.辽河大民屯凹陷潜山裂缝发育特征及其与油气成藏关系研究.
①中国地震局地质研究所.1999.渤海晚第三纪以来构造应力场与断裂活动关系及其在油气勘探开发中的应用.
①中国地震局地质研究所.1999.渤海晚第三纪以来构造应力场与断裂活动关系及其在油气勘探开发中的应用.
陈国光,徐杰,高战武.2003.北华北盆地大震的构造特征[J].华北地震科学,21(2):7～15
丁健民,梁国平.1985.唐山、天津和沧州地区的油井水力压裂应力测量[J].地震学报,7(4):363～373
丁健民,梁国平,郭启良.1986.山东渤海沿岸地区深部应力测量主应力方向的测定[J].地震学刊,(1):1～9
董瑞树,蒋秀琴.1986.渤海周围地区地震震源机制解和应力场特征[J].东北地震研究,2(1):56～62
邓起东,闵伟,晁洪太,等.2001.渤海地区新生代构造与地震活动[A].见:卢演畴等主编.新构造与环境[C].北京:地震出版社,218～233
邓远华.2002.渤海油气勘探历程回顾[J].中国海上油气(地质),16(2):98～101
高战武,徐杰,宋长青,等.2000.华北沧东断裂的构造特征[J].地震地质,22(4):125～133
环文林,汪素云,常向东,等.1989.渤海地震活动特征[J].地震研究,12(1):1～10
黄福林,胡连英,徐学思,等.1993.中国海新构造特征[J].海洋地质与第四纪地质,13(增刊):1～34
卢造勋,姜秀琴,白云,等.1999.胶辽渤海地区地壳上地幔结构特征与介质的横向非均匀性[J].华北地震科学,17(2):43～51
魏光兴,周翠英,赵兴兰.1982.华北地区中小地震应力场的优势方向[J].地球物理学报,5(4):333～343
魏光兴,周翠英,胡政,等.1988.沂沭断裂带现代构造应力场及震源错动性质[J].中国地震,4(3):96～101
王强,李凤林.1983.渤海湾西岸第四纪海陆变迁[J].海洋地质与第四纪地质,3(4):83～90
徐杰,牛娈芳,王春华,等.1996.唐山—河间—磁县新生地震构造带[J].地震地质,18(3):193～198
徐杰,宋长青,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):146～154
徐杰,宋长青,高占武.1999.营口—潍坊断裂带新生代活动的特征[J].地震地质,21(4):289～300
徐杰,马宗晋,高战武,等.2002.渤海湾盆地的一些重要构造特征[A].见:中国石油学会地质专业委员会编.油气盆地研究新进展.第一辑[C].北京:石油工业出版社,170～179
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
周翠英,周焕鹏,李人杰.1990.渤海及其周围地区现代构造应力场特征[J].地震学刊,(3):18～25
中国科学院海洋研究所海洋地质研究室.1985.渤海地质[M].北京:科学出版社,191～222
BellJS ,GoughDI .1979.NortheastSouthwestcompressivestressinAlberta:Evidencefromoilwells[J].EarthandPlanetaryScienceLetters,45:475～482
XuJie,GaoZhanwu,SongChangqing,etal.2001a.StructuralcharcteristicsoftheTaihangshanpiedmontfaultzone[J].SeientiaGeo logicaSinica,10(1):51～69
XuJie,GaoZhanwu,SongChangqing.2001b.NewlygeneratedseismotectoniczonesinNorthChinaanditsregionalseismotectonicframework[J].ScientiaGeologicaSinica,10(3):159～168
XuJie,GaoZhanwu,SunJianbao,etal.2001c.Apreliminarystudyongeologicalandseismogenicstructuresintheregionof1969M7.4BohaiSeaearthquake[J].EarthquakeResearchinChina,15(4):365～379