黄海及其邻区深部结构特点与地质演化
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摘要
根据黄海及其周边地区的布格重力资料 ,通过多种方法处理 ,得到有关断裂的信息并求取了研究区的地壳厚度分布 .经过与地震层析成像结果、地质资料的对比和综合分析 ,认为朝鲜半岛西缘断裂带和济州岛南缘断裂带均为深大断裂 ,断裂带的两侧速度结构存在较大差异 .推断朝鲜半岛和南黄海分别属于不同的地质单元 .根据对岩石层结构的综合分析 ,认为中朝与扬子块体在黄海海域的接触关系是扬子块体推覆于中朝块体之上 .从目前的地震层析成像、重力异常、地壳厚度分布等结果来看 ,还不足以判断扬子与华南块体结合带在黄海海域中的准确位置 .
The information of faults is obtained by various processing of Bouguer gravity data in the Yellow sea and its adjaceat regions. The distribution of crust thickness in this region is also obtained. Based upon geological and geophysical comprehensive analysis and after comparing with the result of seismic tomography, it is considered that the west marginal fault zone of the Korean Peninsula and the south marginal fault zone of the Cheju Island are deep and great faults. The velocity structure at the both sides of these faults are quite different. It is concluded that the Korean Peninsula and the South Yellow Sea belong to different geological units. From comprehensive analysis of lithosphere structure, it is believed that the contacting relationship between the Sino-Korea and Yangtze blocks is that the Yangtze block overthrusts on the Sino-Korea block. According to the results of seismic tomography, gravity and crust thickness of the research region, it is still difficult to determine the exact location of the boundary belt between the Yangtze block and Huanan (South China) block in Yellow Sea.
The information of faults is obtained by various processing of Bouguer gravity data in the Yellow sea and its adjaceat regions. The distribution of crust thickness in this region is also obtained. Based upon geological and geophysical comprehensive analysis and after comparing with the result of seismic tomography, it is considered that the west marginal fault zone of the Korean Peninsula and the south marginal fault zone of the Cheju Island are deep and great faults. The velocity structure at the both sides of these faults are quite different. It is concluded that the Korean Peninsula and the South Yellow Sea belong to different geological units. From comprehensive analysis of lithosphere structure, it is believed that the contacting relationship between the Sino-Korea and Yangtze blocks is that the Yangtze block overthrusts on the Sino-Korea block. According to the results of seismic tomography, gravity and crust thickness of the research region, it is still difficult to determine the exact location of the boundary belt between the Yangtze block and Huanan (South China) block in Yellow Sea.
引文
[1] 郝天珧,SuhMancheol,王谦身等.根据重力数据研究黄海周边断裂带在海区的延伸.地球物理学报,2001,45(3):385～397HAOTianyao,SuhMancheol,WANGQianshenetal.ThestudyofextensionoffaultsinYellowSeaandadjacentregionfromgravitydata.ChineseJ.Geophys.,2002,45(3):385～397
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[13] 江为为.调和系数法与重力资料反演地壳构造.科技大学研究生院学报,1989,6(1):96～104JIANGWeiwei.Theharmoniousseriesandgravitationaldatausedtoinversecrustalstructure.JournalofGraduateSchool,USTC .19896(1):96～104
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[17] CONGBolin,ZHAIMingguo,DENNISA .Carswelletal.Petrogene sisofultrahigh pressurerocksandtheircountryrockatShuangheinDabieshan,centralChina.Eur.J .Mineral,1995,7:119～138
[18] WANGQingchen,AKIRAISHIWATARI,ZHAOZhongyanetal.Coesite bearinggranuliteretrogradedfromeclogiteinWeihai,easternChina.Eur.J .Mineral.,1993,5:141～152
[19] ZHAIMingguo,CONGBolin,GUOJinghuietal.SmNdgeochronolo gyandPetrographyofgarnetPyroxeneGranulitesintheNorthernSuluregionofChinaandtheirGeotectonicimplication.Lithos,1997,52:23～33
[20] 袁学诚,徐明才,唐文榜等.东秦岭陆壳反射地震剖面.地球物理学报,1994,37(6):749～758YUANXuecheng,XUMingcai,TANGWenbangetal.EasternQin lingseismicreflectionprofiling.C
[2] 郝天珧,SuhMancheol,阎晓蔚等.黄海中央断裂带的地球物理证据及其与边缘海演化的关系.地球物理学报,2002,46(2):179～184HAOTianyao,SuhMancheol,YANXiaoweietal.Geophysicalevi dencesforthecenterfaultinYellowSeaandtheirrelationshipwithev olutionofmarginalseas.ChineseJ .Geophys,2002,46(2):179～184
[3] 刘光鼎.中国海区及邻域地球物理场特征.北京:科学出版社,1992LIUGuangding.GeophysicalFieldFeaturesofChinaSeaandAdja centRegions.Beijing:SciencePress.1992
[4] 张文佑主编.中国海区及邻域海陆大地构造.北京:科学出版社,1986.575ZHANGWenyoued.MarineandContinentalTectonicsinChinaSeasandAdjacentRegions.Beijing:SciencePress,1986.575
[5] 金翔龙.北黄海的构造轮廓.见:金翔龙主编,黄东海地质.北京:科学出版社,1982.23～29JINXianglong.TectonicoutlineofnorthernYellowSea.In:JinXian glonged,GeologyofEastChinaSeaandYellowSea.Beijing:Sci encePress,1982.23～29
[6] 杨志坚.胶东地块构造演化及其东延去向问题.海洋地质与第四纪地质,1989,9(2):1～11YANGZhiJian.OnthetectonicevolutionofJiaodongmassifanditsextensiontoeast.MarineGeology&QuaternaryGeology,1989,9(2):1～11
[7] YinA ,NieSAn.IndentationmodeforthenorthandSouthChinacol lisionandthedevelomentoftheTan luandHonamfaultsystems,easternAsia.Tectonics,1993,12:801～813
[8] 蔡 峰.北黄海盆地基底地质特征.海洋地质动态,1996,100(169):1～3CAIFeng.GeologicalfeatureofthebasementintheNorthYellowSeabasin.MarineGeologyLetters,1996,100(169):1～3.
[9] 秦蕴珊,赵一阳,陈丽蓉等主编.黄海地质.北京:海洋出版社,1989QINYunshan,ZHAOYiyang,CHENLirong,etal.GeologyofYel lowSea.Beijing:ChinaOceanPress,1989
[10] 刘光鼎主编.中国海区及邻域地质地球物理场系列图.北京:科学出版社,1992LIUGuangdinged.GeophysicalSeriesMapsinChinaSeaandAdja centRegions.Beijing:SciencePress,1992
[11] 郝天珧,刘伊克,徐万哲.黄海和邻区重磁场及区域构造特征.地球物理学进展,1998,13(1):27～39HAOTianyao,LIUYike,SUHMancheol.GravityandmagneticfieldfeaturesandtectonicscharacteristicsinYellowSeaandadjacentre gion.ProgressinGeophysics,1998,13(1):27～39
[12] 刘福田,李强,吴华等.用于速度图像重建的层析成像法.地球物理学报,1989,32(1):46～61LIUFutian,LIQiang,WUHuaetal.OntheTomographicInverseMethodUsedinVelocityImageRecomstruction.ChineseJ.Geophys.(ActaGeophysicaSinica),1989,32(1):61～80
[13] 江为为.调和系数法与重力资料反演地壳构造.科技大学研究生院学报,1989,6(1):96～104JIANGWeiwei.Theharmoniousseriesandgravitationaldatausedtoinversecrustalstructure.JournalofGraduateSchool,USTC .19896(1):96～104
[14] 徐佩芬.大别-苏鲁造山带与华北陆块东部岩石层三维速度结构[博士论文].北京:中国科学院地质与地球物理研究所,2001.XUPeifen.SeismictomographybeneaththeDabieSulucollisionoro genanditsimplicationstotheformationandexhumationoftheultra highpressuremetamorphicrocks[Ph.D .Dissertation].Beijing:In stituteofGeologyandGeophysics,CAS .2001
[15] 龙汉春.试论华北地区地壳拉张,挤压与裂谷推服构造的成因联系.地质论评.1988.34(2):105～113LONGHanchun.RelationsofcrustalextensionandcompressiontoriftandnappestructuresinNorthChina.GeologicalReview,1988.34(2):105～113
[16] 吴根耀,陈焕疆,马 力等.苏皖地块—特提斯演化阶段独立的构造单元.古地理学报,2002,4(2):77～87WUGenyao,CHENHuanjiang,MALietal.SuWanblock:aninde pendenttectonicunitduringperiodofTethyanevolution.JournalofPalaeogeography,2002,4(2):77～87
[17] CONGBolin,ZHAIMingguo,DENNISA .Carswelletal.Petrogene sisofultrahigh pressurerocksandtheircountryrockatShuangheinDabieshan,centralChina.Eur.J .Mineral,1995,7:119～138
[18] WANGQingchen,AKIRAISHIWATARI,ZHAOZhongyanetal.Coesite bearinggranuliteretrogradedfromeclogiteinWeihai,easternChina.Eur.J .Mineral.,1993,5:141～152
[19] ZHAIMingguo,CONGBolin,GUOJinghuietal.SmNdgeochronolo gyandPetrographyofgarnetPyroxeneGranulitesintheNorthernSuluregionofChinaandtheirGeotectonicimplication.Lithos,1997,52:23～33
[20] 袁学诚,徐明才,唐文榜等.东秦岭陆壳反射地震剖面.地球物理学报,1994,37(6):749～758YUANXuecheng,XUMingcai,TANGWenbangetal.EasternQin lingseismicreflectionprofiling.C
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