黄海深部结构与中朝—扬子块体结合带在海区位置的地球物理研究
摘要
以黄海及其邻区为研究对象 ( 32～ 4 2°N ,1 2 0～ 1 30°E) ,以研究区的空间重力异常、布格重力异常和地震层析成像数据为基础 ,在研究区中分辨出方向各异的主要断裂带并给出它们的分布。对在朝鲜半岛存在的一条近SN向分布的断裂带进行了重点讨论。根据重力数据、莫霍深度分布特点和层析成像的结果 ,认为该断裂带的两侧应属于不同的构造地质单元 ;提出该断裂带与五莲—青岛断裂带和济州岛南缘断裂带一起组成了中朝与扬子块体在黄海海区的边界结合带的认识 ;并推测在三叠纪的晚期 ,沿郯庐断裂带和该断裂带曾分别发生过左旋和右旋走滑。受SN向挤压应力的作用 ,(下 )扬子块体被平移嵌入到中朝块体之中。因此 ,两个块体在海区的结合带为一个巨大的“Z”字型的入构造
Free-air and Bouguegravity anomalies and seismic tomography show major faults in the Yellow Sea and adjacent areas between 120°E and 132°E, 32°N and 42°N. It is inferred from the geophysical data in the study area that a fracture along SN direction near the west margin of Korean Peninsula can be a part of boundary between Sino-Korean and Yangtze blocks. The whole boundary in Yellow Sea is consisted of Wulian-Qingdao Fault, South Marginal Fault of Jeju Island and the West Margin Fault of Korean Peninsula. It is inferred that during late Triassic period the compression stress in SN direction facilitated the northward movement of Yangtze block, leading to sinistral slip along Tancheng-Lujiang fault zone in Eastern China and dextral strike slip along the West Marginal Fault of Korean Peninsula. The movement resulted in the insertion of the Yangtze block to the Sino-Korean block. So the boundary belt between the two blocks in Yellow Sea presents a giant Z-shaped pattern.
Free-air and Bouguegravity anomalies and seismic tomography show major faults in the Yellow Sea and adjacent areas between 120°E and 132°E, 32°N and 42°N. It is inferred from the geophysical data in the study area that a fracture along SN direction near the west margin of Korean Peninsula can be a part of boundary between Sino-Korean and Yangtze blocks. The whole boundary in Yellow Sea is consisted of Wulian-Qingdao Fault, South Marginal Fault of Jeju Island and the West Margin Fault of Korean Peninsula. It is inferred that during late Triassic period the compression stress in SN direction facilitated the northward movement of Yangtze block, leading to sinistral slip along Tancheng-Lujiang fault zone in Eastern China and dextral strike slip along the West Marginal Fault of Korean Peninsula. The movement resulted in the insertion of the Yangtze block to the Sino-Korean block. So the boundary belt between the two blocks in Yellow Sea presents a giant Z-shaped pattern.
引文
翟明国.山东半岛与朝鲜半岛造山带与基底对比研究.国家基金(40234050)结题报告.中国科学院地质与地球物理研究所,2003.
刘建华,胥颐.中国边缘海及相邻陆区岩石层结构特征.国家基础研究(G200004670101)中期评估报告.中国科学院地质与地球物理研究所,2002.
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刘建华,胥颐.中国边缘海及相邻陆区岩石层结构特征.国家基础研究(G200004670101)中期评估报告.中国科学院地质与地球物理研究所,2002.
[1] ZHANGWenyou.MarineandContinentalTectonicsinChinaSeasandAdjacentRegions[M ].Beijing:SciencePress,1986.575(inChinese). [张文佑.中国海区及邻域海陆大地构造[M].北京:科学出版社,1986.575.]
[2] LIUGuangDing.GeophysicalFieldFeaturesofChinaSeaandAdja centRegions[M].Beijing:SciencePress,1993(inChinese). [刘光鼎.中国海区及邻域地球物理系列图[M].北京:科学出版社,1993.]
[3] YINA ,NIES .AnindentationmodeforthenorthandsouthChinacollisionandthedevelopmentoftheTanLuandHonamfaultsys tems,easternAsia[J].Tectonics,1993,12:801813.
[4] QINYunshan,ZHAOYiyang,CHENLirong,etal.GeologyofYel lowSea[M ].Beijing:OceanicPublishingHouse,1989(inChi nese). [秦蕴珊,赵一阳,陈丽蓉,等.黄海地质[M].北京:海洋出版社,1989.]
[5] YANGZhijian.OnthetectonicevolutionofJiaodongmassifanditsextensiontoEast[J].MarineGeology&QuaternaryGeology,1989,9(2):111(inChinese). [杨志坚.胶东地块构造演化及其东延去向问题[J].海洋地质与第四纪地质,1989,9(2):111.]
[6] CAIDongsheng,FENGXiaojie,ZHANGXiaoyan,etal.TectonicevolutionarycharacteristicsandMesozoicandPaleozoicpetroleumex plorationprospectsintheYellowSeabasins[J].MarineGeologyLet ters,2002,18(11):2324(inChinese). [蔡东生,冯晓杰,张晓燕,等.黄海海域盆地构造演化特征与中、古生界油气勘探前景探讨[J].海洋地质动态,2002,18(11):2324.]
[7] CAIQianzhong.RegionalgeologyandgeotectonicenvironmentofpetroliferousbasinsintheYellowSea[J].MarineGeologyLetters,2002,18(11):812(inChinese). [蔡乾忠.黄海含油气盆地区域地质与大地构造环境[J].海洋地质动态,2002,18(11):812.]
[8] WANTianfeng.DistinctivecharacteristicsofSinoKoreanandYangtzeplates[J].GeologicalReview,2001,47(1):5763(inChi nese). [万天丰.中朝与扬子板块的鉴别特征[J].地质论评,2001,47(1):5763.]
[9] QIANXianglin.CenozoictectonicevolutioninChinesecontinentandeastadjacentseasandcontinentaldynamicsfeaturesnow[A].Pro ceedingofSymposiumonApplicationofZHUXIA’sGeologicalProspectingTheoryforOilGas[C].Beijing:ChineseGeologicalSo ciety,2000(inChinese). [钱祥麟.中国陆区及东邻海域新生代构造演化与现时大陆动力作用特征[A].朱夏油气勘探地质理论应用学术研讨会材料汇编[C].北京:中国地质学会,2000.]
[10] HAOTianyao,LIUYike,DUANChang.ApproachingfaultsystemoftheEastChinaandadjacentareafromgravityandmagneticdata[J].ChineseJGeophys,1996,39(Suppl):141149(inChinese). [郝天珧,刘伊克,段昶.根据重磁资料探讨中国东部及其邻域断裂体系[J].地球物理学报,1996,39(增刊):141149.]
[11] CAIFeng.GeologicalfeatureofthebasementintheNorthYellowSeaBasin[J].TrendsofMarineGeology,1996,100(169):13(inChi nese). [蔡峰.北黄海盆地基底地质特征[J].海洋地质动态,1996,100(169):13.]
[12] TAOBaoguo.RelationshipofgeologicaltectonicsaroundSouthYel lowSea[J].TranslationCollectionofMarineGeological,1999,85(4):114(inChinese). [陶宝国.南黄海周缘地区的地质构造联系[J].海洋地质译丛,1999,85(4):114.]
[13] JINXianglong.TectonicOutlineofNorthernYellowSea[A].Geolo gyofEastChinaSeaandYellowSea[M ].Beijing:SciencePress,1982.2329(inChinese). [金翔龙.北黄海的构造轮廓[A].黄东海地质[M].北京:科学出版社,1982.2329.]
[14] ISHIWATARIA ,TSUJIMORIT .PaleozoicophiolitesandblueschistsinJapanandRussianPrimoryeinthetectonicframeworkofEastAsi a:Asynthesis[J].TheIslandArc,2003,12:190206.
[15] CHOMoonsup,KWONSungtack,LEEJinhanetal.High pressureamphiboliteoftheImjingangintheYeoncheonChoengokarea[J].JourPetrolSocKorea,1995,4(1):19.
[16] ZHAIMingguo,CONGBolin,GUOJinghui,etal.SmNdgeochronologyandpetrographyofgarnetpyroxenegranulitesintheNorthernSuluRegionofChinaandtheirgeotectonicimplication[J].Lithos,1997,52:2333.
[17] GUANZhining,ANYulin.QuantitativeInterpretationofRegionalMagneticAnomaly[M].Beijing:GeologicalPublishingHouse,1991(inChinese). [管志宁,安玉林.区域磁异常定量解释[M].北京:地质出版社,1991.]
[18] JIANGWeiwei.Theharmoniousseriesandgravitationaldatausedtoinversecrustalstructure[J].JournalofGraduateSchool,USTC ,1989,6(1):96104(inChinese). [江为为.调和级数法与重力资料反演地壳构造[J].科技大学研究生院学报,1989,6(1):96104.]
[19] HAOTianyao,SUHMancheol,WANGQianshen,etal.ThestudyofextensionoffaultsinYellowSeaandadjacentregionfromgravitydata[J].ChineseGeophysicalJournal,2002,45(3):385397(inChi nese). [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[J].地球物理学报,2001,45(3):385397.]
[20] XUPeifen.3DvelocitystructureoflithosphereofDabie—Suluoro genicbeltandeasternHuabei[D].Beijing:InstituteofGeologyandGeophysics,CAS ,2001. [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[D].北京:中国科学院地质与地球物理研究所,2001.]
[21] HAOTianyao,LIUJianhua,MANCHELS ,etal.DeepstructurecharacteristicsandgeologicalevolutioninYellowSeaandadjacentre gion[J].ChineseGeophysicalJournal,2003,46(6):803808(inChinese). [郝天珧,刘建华,MANCHEOLS ,等.黄海及邻区深部结构特点与地质演化[J].地球物理学报,2003,46(6):803808.]
[22] WUGenyao,CHENHuanjiang,MALi,etal.Su—WanBlock:AnindependenttectonicunitduringperiodofTethyanevolution[J].JournalofPalaeogeography,2002,4(2):7787(inChinese). [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[J].古地理学报,2002,4(2):7787.]
[23] WANGXiaofeng,LIZhongying,CHENBailin,etal.TanchengLu jiangFault[M ].Beijing:GeologicalPublishingHouse,2000(inChinese). [王小凤,李中英,陈柏林,等.郯庐断裂带[M].北京:地质出版社,2000.]
[24] FENGZhiqiang,YAOYongjian,XIAOXianghui,etal.ThenewunderstandingonMesozoicPaleozoicstructuralfeatureandhydrocar bonprospectintheYellowSea[J].MarineGeologyLetters,2002,18(11):1720(inChinese). [冯志强,姚永坚,曾祥辉,等.对黄海中、古生界地质构造特征及油气远景的新认识[J].海洋地质动态,2002,18(11):1720.
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