东海及邻域的两条剖面地球物理反演与综合解释
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摘要
根据东海及邻域的布格重力异常资料,在东海海域选择了中国大陆东部-东海陆架-冲绳海槽—琉球岛弧—琉球海沟的两条剖面,利用广义逆方法对两条剖面进行重力和磁力反演,结合其它地震等地球物理及地质资料,对剖面的地壳结构进行了综合研究,给出了相应的地质解释.在此基础上,对东海陆架盆地、冲绳海槽盆地的成因与性质,以及应力作用情况进行了探讨,认为冲绳海槽地壳的纵向结构是一种"二元结构";沟—弧—盆受的主应力方向为NW向;该区平面上地质地球物理现象的分块分带与纵向上的二元构成根本原因与菲律宾海板块和欧亚板块聚敛俯冲方向有关,还与两板块接触部位形状有关.
In light with Bouguer gravity data in East China Sea, two profiles which cross Chinese Mainland, Shelf of East China Sea ,Okinawa Trough, Ryukyu Islands, and Ryukyu Trench are selected and are inverted for gravity and magnetic by the way of generalized inverses system of inversion for gravity and magnetic combine seismic and geological data, we synthetically studied two profiles crust structure , gave their homologous geologica interpretation . Based on these studies, we have discussed the crust structure in the study area, the origin and nature of Shelf of East China Sea and Okinawa Trough basin, and stress, and deemed crust structure of Okinawa Trough, which is a kind of "dualisticstructure";Trench\|arc\|trough system received principal stress direction is NW ,and this area's geology and geophysics character which shows "zones and pieces" in the floor plane and "dualistic structure" in the vector plane is caused by not only subduction direction of Philippine Sea plate with Asian\|Europe plate, but also two plate's contact fringe shape.
In light with Bouguer gravity data in East China Sea, two profiles which cross Chinese Mainland, Shelf of East China Sea ,Okinawa Trough, Ryukyu Islands, and Ryukyu Trench are selected and are inverted for gravity and magnetic by the way of generalized inverses system of inversion for gravity and magnetic combine seismic and geological data, we synthetically studied two profiles crust structure , gave their homologous geologica interpretation . Based on these studies, we have discussed the crust structure in the study area, the origin and nature of Shelf of East China Sea and Okinawa Trough basin, and stress, and deemed crust structure of Okinawa Trough, which is a kind of "dualisticstructure";Trench\|arc\|trough system received principal stress direction is NW ,and this area's geology and geophysics character which shows "zones and pieces" in the floor plane and "dualistic structure" in the vector plane is caused by not only subduction direction of Philippine Sea plate with Asian\|Europe plate, but also two plate's contact fringe shape.
引文
1 820主题专家组办公室，863计算海洋领域海洋探查与资源开发技术（820主题）课题成果汇编
2中国科学院地球物理研究所“八五·国家重点科技攻关项目成果报告”。东海盆地分析和深化及其与天然气生成、运移、聚集的关系[R]1994.6
[1] 江为为,刘少华,朱东英.东海冲绳海槽地质地球物理调查回顾与研究现状[J].地球物理学进展,2001,16(4):71～84.
[2] 金翔龙,喻普之,林美华,等.冲绳海槽地壳结构性质的初步探讨.海洋与湖沼,1983,14(2):105～116.
[3] 刘光鼎主编.中国海区及邻域地质地球物理图集[M].北京:科学出版社,1993.
[4] SibuetJC,etal.BackarcextensionintheOkinawaTrough.JGR,1987,92:14041～14063.
[5] ShinjoR,KatoY.GeochemicalconstraintsontheoriginofbimodalmagmatismattheOkinawaTough,anincipientback-arcbasin.Lithos,2000,54:117～137.
[6] KimuraM,etal.ReportonDELP1984cruisesinthemiddleOkinawa,5,topographyandgeologyofthecentralgrabensandtheirvivinity.Bull.EarthquakeRes.Ins.Univ.Tokyo,1986,61:269～310.
[7] 高德章,唐建,薄玉玲.东海地球物理综合探测剖面及其解释[J].中国海上油气(地质),2003,17(1):38～43.
[8] 栾锡武,秦蕴珊.冲绳海槽宫古段中央地堑及其地质意义[A].见:中国边缘海形成演化及重要资源的关键问题.第三次学术会议论文摘要集[C].2003,59.
[9] 梁瑞才,王述功,吴金龙.冲绳海槽中段地球物理场及对其新生洋壳的认识[J].海洋地质与第四纪地质.2001,21(1):57～64.
[10] 郝天珧,刘建华,郭峰,等.冲绳海槽地区地壳与岩石圈性质研究[A].见:中国边缘海形成演化及重要资源的关键问题.第三次学术会议论文摘要集[C].2003,51.
[11] 秦蕴珊,陈丽蓉,等.东海地质[M].北京:科学出版社,1987.
[12] SergeyevK,KrasnyM,Editors.Geology GeophysicalatlasoftheKuril Kamchatkaislandssystem.MinistryofGeologyofUSSR,1987.
[13] 王家林,吴健生,主编.中国典型含油气盆地综合地球物理研究[M].上海:同济大学出版社,1995.
[14] 王述功,梁瑞才,王勇.冲绳海槽北段的重磁场特征及地质意义[J].海洋地质与第四纪地质,1998,18(4):19～27.
[15] 栾锡武,高德章,喻普之,等.中国东海及邻近海域一条剖面的地壳速度结构研究[J].地球物理学进展,2001,16(2):28～34.
[16] 江为为,郝天珧,刘少华,等.中国东部大陆与东海海域地质构造的相关性分析[J].地球物理学进展,2004,19(1):75～90.
[17] 姜丽丽,刘福田.东海及其邻域地球动力学研究进展[J].海洋地质与第四纪地质,2000,20(3):107～112.
[18] KimuraM,FrukawaM,IzawaE,etal.ReportonDELP1984cruiseintheOkinawaTrough,part7,GeologicinvestigationofthecentralriftinthemiddletosouthernOkinawaTrough[J].Bull.Eri.Univ.Tokyo,1991,66(1):179～210.
[19] 张琴华.东海地区壳体构造演化及其盆地形成机制探讨[J].大地构造与成矿学,1994,18(4):311～320.
[20] 王述功,王冠荣,何长海.东海陆架盆地与冲绳海槽盆地构造活动的差异性[J].黄渤海海洋,1999,17(3):44～49.
[21] 李廷栋,莫杰.中国滨太平洋构造域构造格架和东海地质演化[J].海洋地质与第四纪地质,2002,22(4):1～6.
[22] 赵会民,吕炳全,孙洪斌,等.西太平洋边缘海盆的形成与演化[J].海洋地质与第四纪地质,2002,22(1):57～62.
[23] 李乃胜,姜丽丽,李常珍.冲绳海槽地壳结构的研究[J],海洋与湖沼,1998,29(4):441～450.
[24] 江兴歌,朱建辉,蒋洪堪.应用双层拉张模式研究冲绳海槽的拉张史[J].石油实验地质,1998,20(4):398～404.
[25] 陶瑞明.从西太平洋板块构造探讨东海陆架盆地形成机制和类型划分[J].中国海上油气(地质),1994,8(1):14～20.
[26] 黄培华,苏维加,陈金波.冲绳海槽和琉球岛弧的地震活动与应力场[J].地震学报,1994,16(4):407～415.
2中国科学院地球物理研究所“八五·国家重点科技攻关项目成果报告”。东海盆地分析和深化及其与天然气生成、运移、聚集的关系[R]1994.6
[1] 江为为,刘少华,朱东英.东海冲绳海槽地质地球物理调查回顾与研究现状[J].地球物理学进展,2001,16(4):71～84.
[2] 金翔龙,喻普之,林美华,等.冲绳海槽地壳结构性质的初步探讨.海洋与湖沼,1983,14(2):105～116.
[3] 刘光鼎主编.中国海区及邻域地质地球物理图集[M].北京:科学出版社,1993.
[4] SibuetJC,etal.BackarcextensionintheOkinawaTrough.JGR,1987,92:14041～14063.
[5] ShinjoR,KatoY.GeochemicalconstraintsontheoriginofbimodalmagmatismattheOkinawaTough,anincipientback-arcbasin.Lithos,2000,54:117～137.
[6] KimuraM,etal.ReportonDELP1984cruisesinthemiddleOkinawa,5,topographyandgeologyofthecentralgrabensandtheirvivinity.Bull.EarthquakeRes.Ins.Univ.Tokyo,1986,61:269～310.
[7] 高德章,唐建,薄玉玲.东海地球物理综合探测剖面及其解释[J].中国海上油气(地质),2003,17(1):38～43.
[8] 栾锡武,秦蕴珊.冲绳海槽宫古段中央地堑及其地质意义[A].见:中国边缘海形成演化及重要资源的关键问题.第三次学术会议论文摘要集[C].2003,59.
[9] 梁瑞才,王述功,吴金龙.冲绳海槽中段地球物理场及对其新生洋壳的认识[J].海洋地质与第四纪地质.2001,21(1):57～64.
[10] 郝天珧,刘建华,郭峰,等.冲绳海槽地区地壳与岩石圈性质研究[A].见:中国边缘海形成演化及重要资源的关键问题.第三次学术会议论文摘要集[C].2003,51.
[11] 秦蕴珊,陈丽蓉,等.东海地质[M].北京:科学出版社,1987.
[12] SergeyevK,KrasnyM,Editors.Geology GeophysicalatlasoftheKuril Kamchatkaislandssystem.MinistryofGeologyofUSSR,1987.
[13] 王家林,吴健生,主编.中国典型含油气盆地综合地球物理研究[M].上海:同济大学出版社,1995.
[14] 王述功,梁瑞才,王勇.冲绳海槽北段的重磁场特征及地质意义[J].海洋地质与第四纪地质,1998,18(4):19～27.
[15] 栾锡武,高德章,喻普之,等.中国东海及邻近海域一条剖面的地壳速度结构研究[J].地球物理学进展,2001,16(2):28～34.
[16] 江为为,郝天珧,刘少华,等.中国东部大陆与东海海域地质构造的相关性分析[J].地球物理学进展,2004,19(1):75～90.
[17] 姜丽丽,刘福田.东海及其邻域地球动力学研究进展[J].海洋地质与第四纪地质,2000,20(3):107～112.
[18] KimuraM,FrukawaM,IzawaE,etal.ReportonDELP1984cruiseintheOkinawaTrough,part7,GeologicinvestigationofthecentralriftinthemiddletosouthernOkinawaTrough[J].Bull.Eri.Univ.Tokyo,1991,66(1):179～210.
[19] 张琴华.东海地区壳体构造演化及其盆地形成机制探讨[J].大地构造与成矿学,1994,18(4):311～320.
[20] 王述功,王冠荣,何长海.东海陆架盆地与冲绳海槽盆地构造活动的差异性[J].黄渤海海洋,1999,17(3):44～49.
[21] 李廷栋,莫杰.中国滨太平洋构造域构造格架和东海地质演化[J].海洋地质与第四纪地质,2002,22(4):1～6.
[22] 赵会民,吕炳全,孙洪斌,等.西太平洋边缘海盆的形成与演化[J].海洋地质与第四纪地质,2002,22(1):57～62.
[23] 李乃胜,姜丽丽,李常珍.冲绳海槽地壳结构的研究[J],海洋与湖沼,1998,29(4):441～450.
[24] 江兴歌,朱建辉,蒋洪堪.应用双层拉张模式研究冲绳海槽的拉张史[J].石油实验地质,1998,20(4):398～404.
[25] 陶瑞明.从西太平洋板块构造探讨东海陆架盆地形成机制和类型划分[J].中国海上油气(地质),1994,8(1):14～20.
[26] 黄培华,苏维加,陈金波.冲绳海槽和琉球岛弧的地震活动与应力场[J].地震学报,1994,16(4):407～415.
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