东海重磁地震综合探测剖面研究
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摘要
依据东海南部一条自东海陆架直至菲律宾海盆的重磁地震综合探测剖面 ,采用地壳结构重磁地震综合反演解释系统开展岩石圈结构的综合研究 ,制作了岩石圈结构地学断面图 .结果表明基隆凹陷为一中新生代沉积凹陷 ,沉积厚度达到 14km ;冲绳海槽盆地为弧后扩张地堑型盆地 ,地壳厚度仅为 14 .5km ;菲律宾板块沿北西西方向向欧亚板块俯冲 ,莫霍面急剧下插 ,导致冲绳海槽的形成与发展 ;岩石圈厚度约为 80km ,但在 370km处仅为 5 3km ,在 4 5 0km至 5 4 0km处岩石圈厚度大于 10 0km .
We apply the comprehensive inversion and interpretation method of gravitative, magnetic and seismic data for crustal structure to the study of lithospheric structure beneath the East China Sea. This study is based on a gravitative-magnetic and seismic survey profile which extends from the East China Sea shelf to the Phillipine basin. As result we make geortransect map of the lithospheric structure for this area. The map shows that the Jilong depression (near Taiwan) is a Mesozoic-Cenozoic sedimentary basin where the sediment is 14km thick. The Okinawa trough basin is of the back arc extentional graben type with crustal thickness of merely 14.5km. The Phillipine plate under thrusts dives toward the Eurasia plate in NWW direction, resulting in steep Moho interface and formation and development of the Okinawa trough, where the lithosphere is about 80km thick. But at other positions on the profile, the lithospheric thickness varies. For instance it is 53km at the site 370km and more than 100km at the site from 450km to 540km on the profile.
We apply the comprehensive inversion and interpretation method of gravitative, magnetic and seismic data for crustal structure to the study of lithospheric structure beneath the East China Sea. This study is based on a gravitative-magnetic and seismic survey profile which extends from the East China Sea shelf to the Phillipine basin. As result we make geortransect map of the lithospheric structure for this area. The map shows that the Jilong depression (near Taiwan) is a Mesozoic-Cenozoic sedimentary basin where the sediment is 14km thick. The Okinawa trough basin is of the back arc extentional graben type with crustal thickness of merely 14.5km. The Phillipine plate under thrusts dives toward the Eurasia plate in NWW direction, resulting in steep Moho interface and formation and development of the Okinawa trough, where the lithosphere is about 80km thick. But at other positions on the profile, the lithospheric thickness varies. For instance it is 53km at the site 370km and more than 100km at the site from 450km to 540km on the profile.
引文
1)许薇玲.东海地学断面综合研究.上海海洋地质调查局.1990
2)栾锡武.冲绳海槽的构造演化.中国科学院海洋研究所.2001
3)海洋地质调查局情报资料室.琉球群岛、冲绳海槽、钓鱼岛地质(译文集).地质矿产部海洋地质调查局.1987
4)赵金海,王舜杰,徐峰等.海洋深部地壳结构探测技术课题研制技术报告.820-01-03课题组.2000
5)高德章,唐建,薄玉玲等.地壳结构重磁地震综合反演技术研究报告.上海海洋石油局,广州海洋地质调查局.2000
6)曾久岭,谢仁海.东海—菲律宾海地震(SAP)剖面解释报告.上海海洋石油规划设计研究院.2000
[1] 刘光鼎.中国海区及邻域地质地球物理图集.北京:科学出版社,1992LiuGD .GeologicGeophysicalMapsofChinaSeaandAdjacentRegions(inChinese).Beijing:SciencePress,1992
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[3] 侯遵泽,杨文采,刘家琦.中国大陆地壳密度差异多尺度反演.地球物理学报,1998,41(5):642～651HouZZ ,YangWC ,LiuJQ .MultiscaleinversionofdensitydistributionoftheChinesecrust.ChineseJ .Geophys.(inChinese),1998,41(5):642～651
[4] 侯遵泽,杨文采.中国重力异常的小波变换与多尺度分析.地球物理学报,1997,40(1):85～95HouZZ ,YangWC .Two dimensionalwavelettransformandmulti scaleanalysisofthegravityfieldofChina.ChineseJ.Geophys.(inChinese),1997,40(1):85～95
[5] 高德章,侯遵泽,唐 建.东海及邻区重力异常多尺度分解.地球物理学报,2000,43(6):842～849.GaoDZ ,HouZZ ,TangJ.MultiscaleanalysisofgravityanomaliesonEastChinaSeaandadjacentregion.ChineseJ .Geophys.(inChinese),2000,43(6):842～849
[6] 刘申叔,李上卿等.东海油气地球物理勘探.北京:地质出版社,2001.12LiuSS ,LiSQ ,etal.PetroleumProspectingintheEastChinaSea(inChinese).Beijing:GeologicalPublishingHouse,2001.12
[7] 高德章.东海陆架盆地岩石密度与磁性.上海地质,1995,(2):38～45GaoDZ .DensityandmagneticofrockintheEastSeashelfbasin.ShanghaiGeology(inChinese),1995,(2):38～45
[8] LeydenR ,EwingM ,MurauchiS .SonobuoyrefractionmeasurementinEastChinaSea.TheAmericanAssociationofPetroleumGeologistsBulletion,1973,57(12):2396～2403
[9] KennettJ(美),成国栋等译.海洋地质学.北京:海洋出版社,1992KennettJ .MarineGeology(inChinese).Bytrans.ChengGD ,etal.Beijing:OceanPress,1992
[10] 金性春,周祖翼,汪品先.大洋钻探与中国地球科学.上海:同济大学出版社,1995JinXC ,ZhouZY ,WangPX .OceanDrillingProgramandEarthSciencesinChina(inChinese).Shanghai:TongjiUniversityPress,1995
[11] MurauchiS ,DenN ,AsanoS ,etal.CrustalstructureofthePhilippineSea.J.Geophys.Res.,1968,73:3143～3171
2)栾锡武.冲绳海槽的构造演化.中国科学院海洋研究所.2001
3)海洋地质调查局情报资料室.琉球群岛、冲绳海槽、钓鱼岛地质(译文集).地质矿产部海洋地质调查局.1987
4)赵金海,王舜杰,徐峰等.海洋深部地壳结构探测技术课题研制技术报告.820-01-03课题组.2000
5)高德章,唐建,薄玉玲等.地壳结构重磁地震综合反演技术研究报告.上海海洋石油局,广州海洋地质调查局.2000
6)曾久岭,谢仁海.东海—菲律宾海地震(SAP)剖面解释报告.上海海洋石油规划设计研究院.2000
[1] 刘光鼎.中国海区及邻域地质地球物理图集.北京:科学出版社,1992LiuGD .GeologicGeophysicalMapsofChinaSeaandAdjacentRegions(inChinese).Beijing:SciencePress,1992
[2] 刘光鼎.中国海区及邻域地质地球物理特征.北京:科学出版社,1992LiuGD .GeologicGeophysicalFeaturesofChinaSeaandAdjacentRegions(inChinese).Beijing:SciencePress,1992
[3] 侯遵泽,杨文采,刘家琦.中国大陆地壳密度差异多尺度反演.地球物理学报,1998,41(5):642～651HouZZ ,YangWC ,LiuJQ .MultiscaleinversionofdensitydistributionoftheChinesecrust.ChineseJ .Geophys.(inChinese),1998,41(5):642～651
[4] 侯遵泽,杨文采.中国重力异常的小波变换与多尺度分析.地球物理学报,1997,40(1):85～95HouZZ ,YangWC .Two dimensionalwavelettransformandmulti scaleanalysisofthegravityfieldofChina.ChineseJ.Geophys.(inChinese),1997,40(1):85～95
[5] 高德章,侯遵泽,唐 建.东海及邻区重力异常多尺度分解.地球物理学报,2000,43(6):842～849.GaoDZ ,HouZZ ,TangJ.MultiscaleanalysisofgravityanomaliesonEastChinaSeaandadjacentregion.ChineseJ .Geophys.(inChinese),2000,43(6):842～849
[6] 刘申叔,李上卿等.东海油气地球物理勘探.北京:地质出版社,2001.12LiuSS ,LiSQ ,etal.PetroleumProspectingintheEastChinaSea(inChinese).Beijing:GeologicalPublishingHouse,2001.12
[7] 高德章.东海陆架盆地岩石密度与磁性.上海地质,1995,(2):38～45GaoDZ .DensityandmagneticofrockintheEastSeashelfbasin.ShanghaiGeology(inChinese),1995,(2):38～45
[8] LeydenR ,EwingM ,MurauchiS .SonobuoyrefractionmeasurementinEastChinaSea.TheAmericanAssociationofPetroleumGeologistsBulletion,1973,57(12):2396～2403
[9] KennettJ(美),成国栋等译.海洋地质学.北京:海洋出版社,1992KennettJ .MarineGeology(inChinese).Bytrans.ChengGD ,etal.Beijing:OceanPress,1992
[10] 金性春,周祖翼,汪品先.大洋钻探与中国地球科学.上海:同济大学出版社,1995JinXC ,ZhouZY ,WangPX .OceanDrillingProgramandEarthSciencesinChina(inChinese).Shanghai:TongjiUniversityPress,1995
[11] MurauchiS ,DenN ,AsanoS ,etal.CrustalstructureofthePhilippineSea.J.Geophys.Res.,1968,73:3143～3171
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