钓鱼岛隆褶带物质构成及东海西湖凹陷原型盆地东边界再认识
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摘要
古近系原型盆地的恢复是关乎西湖凹陷主要勘探层系花港组和平湖组沉积体系和成藏地质研究的关键问题,对西湖凹陷东缘钓鱼岛隆褶带构造演化的合理认识是解决古近纪原型盆地难题的钥匙.受限于研究区薄弱的资料基础,创新性地通过重、磁、震资料综合分析以获取地质认识上的突破.研究表明钓鱼岛隆褶带早期为"东海陆架外缘隆起"的一部分,后期经历了强烈的岩浆增生改造.在结构上,隆褶带内T20界面之下主要由古老变质基底、岩浆岩体和残余洼陷充填层构成.隆褶带内的残余洼陷及地层具有北东向、雁列式分布的特征,这些地层主要为渐新世岩浆增生改造前沉积的始新统平湖组,局部为渐新统花港组,是古近系西湖凹陷原型盆地东缘残留的一部分.西湖凹陷古近系原型盆地东边界位于现今的钓鱼岛隆褶带范围内,为北东向雁列式分布的断裂,断裂之间存在不同类型的变换过渡.在钓鱼岛隆褶带岩浆增生过程中,岩体顺边界断裂上涌,"淹没"了原型盆地边界,原型盆地东缘地层经受了大规模隆升剥蚀,原有的构造面貌和形态发生了极大的变化.
The restoration of Paleogene prototype basin is a key problem related to the study of sedimentary system and hydrocarbon accumulation of Huagang Formation and Pinghu Formation in the main exploration strata in Xihu Sag,whereas a reasonable understanding of the structural evolution of Diaoyu Islands folded zone in the east margin of Xihu Sag is the key to the problem.However,relevant studies are often limited by the weak data base of the research area.In this paper a breakthrough in the geological understanding through the comprehensive analysis of gravity,magnetic and seismic data innovatively is obtained.It is believed that in the early stage the Diaoyu Islands folded zone was part of the"East China Sea shelf outer margin uplift"and underwent intense magmatic hyperplasia in the later stage.Structurally,the part under the T20 interface in the folded zone is mainly composed of ancient metamorphic basement,magmatic rock mass and residual sag filling layer.The residual sag and strata in the folded zone are characterized by NE-trending and enechel on distribution.These strata are mainly Eocene Pinghu Formation deposited before Oligocene magmatic hyperplasia and transformation,and are the residual part of the eastern margin of the Paleogene prototype basin of Xihu Sag.The eastern boundary of the Paleogene prototype basin of Xihu Sag is located in the current Diaoyu Islands folded zone,and is a series of NE-trending faults in enechel on distribution,and there are different types of transition between faults.In the process of magmatic proliferation in the Diaoyu Islands folded zone,the rock mass upwelling along the boundary fault"submerged"the boundary of the prototype basin.The strata in the eastern margin of the prototype basin underwent large-scale uplift and denudation,and the original structural appearance and morphology were greatly changed.
The restoration of Paleogene prototype basin is a key problem related to the study of sedimentary system and hydrocarbon accumulation of Huagang Formation and Pinghu Formation in the main exploration strata in Xihu Sag,whereas a reasonable understanding of the structural evolution of Diaoyu Islands folded zone in the east margin of Xihu Sag is the key to the problem.However,relevant studies are often limited by the weak data base of the research area.In this paper a breakthrough in the geological understanding through the comprehensive analysis of gravity,magnetic and seismic data innovatively is obtained.It is believed that in the early stage the Diaoyu Islands folded zone was part of the"East China Sea shelf outer margin uplift"and underwent intense magmatic hyperplasia in the later stage.Structurally,the part under the T20 interface in the folded zone is mainly composed of ancient metamorphic basement,magmatic rock mass and residual sag filling layer.The residual sag and strata in the folded zone are characterized by NE-trending and enechel on distribution.These strata are mainly Eocene Pinghu Formation deposited before Oligocene magmatic hyperplasia and transformation,and are the residual part of the eastern margin of the Paleogene prototype basin of Xihu Sag.The eastern boundary of the Paleogene prototype basin of Xihu Sag is located in the current Diaoyu Islands folded zone,and is a series of NE-trending faults in enechel on distribution,and there are different types of transition between faults.In the process of magmatic proliferation in the Diaoyu Islands folded zone,the rock mass upwelling along the boundary fault"submerged"the boundary of the prototype basin.The strata in the eastern margin of the prototype basin underwent large-scale uplift and denudation,and the original structural appearance and morphology were greatly changed.
引文
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Gungor,A.,Lee,G.H.,Kim,H.J.,et al.,2012.Structural Characteristics of the Northern Okinawa Trough and Adjacent Areas from Regional Seismic Reflection Data:Geologic and Tectonic Implications.Tectonophysics,522-523:198-207.https://doi.org/10.1016/j.tecto.2011.11.027
Guo,K.,Zhai,S.K.,Yu,Z.H.,et al.,2016.Determination and Tectonic Significance of Volcanic Rock Series in the O-kinawa Trough.Earth Science,41(10):1655-1664(in Chinese with English abstract).https://doi.org/10.3799/dqkx.2016.524
Halbach,P.,Nakamura,K.I.,Wahsner,M.,et al.,1989.Probable Modern Analogue of Kuroko-Type Massive Sulphide Deposits in the Okinawa Trough Back-Arc Basin.Nature,338(6215):496-499.https://doi.org/10.1038/338496a0
Jiang,Y.M.,He,X.J.,Zhang,S.L.,2016.The Characteristics of“Inverse-Transform”Tectonic Migration Evolution of the East China Sea Shelf Basin-By Taking the Marginal Structure of Xihu Sag for Example.Journal of Yangtze University(Natural Science Edition),13(26):1-7(in Chinese with English abstract).
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Kato,Y.,1987.The Location and Amount of Volcanic Deposits in the West of the Ryukyu Islands.In:Information Office of the Marine Geological Survey,ed.,The Geology of Ryukyu Islands,Okinawa Trough and Diaoyu Islands(Translation Set).The Marine Geological Survey of Bureau of Geology and Mineral Resources,Shanghai,61-68(in Chinese).
Kimura,M.,1987.The Formation of Okinawa Trough Graben.In:Information Office of the Marine Geological Survey,ed.,The Geology of Ryukyu Islands,Okinawa Trough and Diaoyu Islands(Translation Set).The Marine Geological Survey of Bureau of Geology and Mineral Resources,Shanghai 23-40(in Chinese).
Kong,F.C.,Lawver,L.A.,Lee,T.Y.,2000.Evolution of the Southern Taiwan-Sinzi Folded Zone and Opening of the Southern Okinawa Trough.Journal of Asian Earth Sciences,18(3):325-341.https://doi.org/10.1016/s1367-9120(99)00062-0
Lee,C.S.,Shor Jr,G.G.,Bibee,L.D.,et al.,1980.Okinawa Trough:Origin of a Back-Arc Basin.Marine Geology,35(1-3):219-241.https://doi.org/10.1016/0025-3227(80)90032-8
Li,C.F.,Chen,B.,Zhou,Z.Y.,2009.Deep Crustal Structures of Eastern China and Adjacent Seas Revealed by Magnetic Data.Scientia Sinica Terrae,39(12):1770-1779(in Chinese).
Li,G.Q.,Li,X.L.,1995.Geological Tectonic Characteristics of the Outer Margin Upwarped Zone of the East China Sea Shelf.Journal of Ocean University of Qingdao,25(2):199-205(in Chinese with English abstract).
Li,N.S.,Jiang,L.L.,Li,C.Z.,1998.A Study on the Nature of Crustal Structures of the Okinawa Trough.Oceanologia et Limnologia Sinica,29(4):441-450(in Chinese with English abstract).
Li,X.Q.,Liu,J.S.,Lu,Y.C.,et al.,2018.Prototype Basin Characterization of Huagang Formation of Xihu Depression,East China Sea Shelf Basin.Earth Science,43(2):502-513(in Chinese with English abstract).https://doi.org/10.3799/dqkx.2017.596
Liu,G.D.,Xu,W.L.,1989.Geological and Geophysical Characteristics of China Sea and Its Adjacent Areas.Science Press,Beijing(in Chinese).
Matsumoto,O.,1987.Geology and Intrusive Rocks of Diaoyu Island,North Island and South Island.In:Information Office of the Marine Geological Survey,ed.,The Geology of Ryukyu Islands,Okinawa Trough and Diaoyu Islands(Translation Set).The Marine Geological Survey of Bureau of Geology and Mineral Resources,Shanghai 80-97(in Chinese).
Sun,Z.C.,2004.Progress of Petroleum Geology Research for the East China Sea and on Tectonic Evolution of Cenozoic Basins in the Continental Margins along the West Pacific Ocean:An Evolutional Model of OceanwardsReceding Residual Rear-Arc Basins.Marine Origin Petroleum Geology,9(1-2):1-17(in Chinese with English abstract).
Wang,P.,Liang,J.S.,Zhang,Z.G.,et al.,2012.Diaoyu Islands Folded-Uplift Belt Evolution Characteristics and Its Importance on the Hydrocarbon Exploration in East China Sea Basin.Petroleum Geology and Engineering,26(6):10-14(in Chinese with English abstract).
Wang,P.,Zhao Z.G.,Zhang,G.C.,et al.,2011.Analysis on Structural Evolution in Diaoyu Islands Folded-Uplift Belt,East China Sea Basin and Its Impact on the Hydrocarbon Exploration in Xihu Sag.Geological Science and Technology Information,30(4):65-72(in Chinese with English abstract).
Yang,W.D.,Cui,Z.K.,Zhang,Y.B.,2010.Geology and Mineral Resources of East China Sea.China Ocean Press,Beijing(in Chinese).
Zhao,Z.G.,Wang,P.,Qi,P.,et al.,2016.Regional Background and Tectonic Evolution of East China Sea Basin.Earth Science,41(3):546-554(in Chinese with English abstract).https://doi.org/10.3799/dqkx.2016.045
Zhou,Z.Y.,Liao,Z.T.,Jin,X.C.,et al.,2001.Okinawa Trough:The Highest Stage of Continental Tension Rifting in Back Arc Setting.Marine Geology&Quaternary Geology,21(1):51-55(in Chinese with English abstract).
陈沪生,张永鸿,徐师文,等,1999.下扬子及邻区岩石圈结构构造特征与油气资源评价.北京:地质出版社.
国坤,翟世奎,于增慧,等,2016.冲绳海槽火山岩岩石系列的厘定及构造环境意义.地球科学,41(10):1655-1664.https://doi.org/10.3799/dqkx.2016.524
加藤佑三,1987.琉球群岛西表海底火山的位置和喷发物数量.见:海洋地质调查局情报资料室编译,琉球群岛、冲绳海槽、钓鱼岛地质(译文集).上海:地质矿产部海洋地质调查局,61-68.
蒋一鸣,何新建,张绍亮,2016.东海陆架盆地“反转改造”构造迁移演化特征---以西湖凹陷边缘构造为例.长江大学学报(自科版),13(26):1-7.
金翔龙,喻普之,1987.冲绳海槽的构造特征与演化.中国科学(B辑),(2):196-203.
李春峰,陈冰,周祖翼,2009.中国东部及邻近海域磁异常数据所揭示的深部构造.中国科学:地球科学,39(12):1770-1779.
李桂群,李学伦,1995.东海陆架外缘隆起带地质构造特征.青岛海洋大学学报,25(2):199-205.
李乃胜,姜丽丽,李常珍,1998.冲绳海槽地壳结构的研究.海洋与湖沼,29(4):441-450.
李祥权,刘金水,陆永潮,等,2018.东海陆架盆地西湖凹陷花港组原型盆地性质厘定.地球科学,43(2):502-513.https://doi.org/10.3799/dqkx.2017.596
刘光鼎,许薇龄,1989.中国海区及邻域地质地球物理特征.北京:科学出版社.
木村政昭,1987.冲绳海槽地堑的形成.见:海洋地质调查局情报资料室编译,琉球群岛、冲绳海槽、钓鱼岛地质(译文集).上海:地质矿产部海洋地质调查局,23-40.
松本征夫,1987.钓鱼岛、北小岛、南小岛的地质及侵入岩类.见:海洋地质调查局情报资料室编译,琉球群岛、冲绳海槽、钓鱼岛地质(译文集).上海:地质矿产部海洋地质调查局,80-97.
孙肇才,2004.从东海石油地质重要进展看西太平洋大陆边缘新生代盆地的构造演化---种海沟向洋后退的残余弧后盆地演化模式.海相油气地质,9(1-2):1-17.
王鹏,梁建设,赵志刚,等,2012.钓鱼岛隆褶带演化特征及其对东海盆地油气勘探的意义.石油地质与工程,26(6):10-14.
王鹏,赵志刚,张功成,等,2011.东海盆地钓鱼岛隆褶带构造演化分析及对西湖凹陷油气勘探的意义.地质科技情报,30(4):65-72.
杨文达,崔征科,张异彪,2010.东海地质与矿产.北京:海洋出版社.
赵志刚,王鹏,祁鹏,等,2016.东海盆地形成的区域地质背景与构造演化特征.地球科学,41(3):546-554.https://doi.org/10.3799/dqkx.2016.045
周祖翼,廖宗廷,金性春,等,2001.冲绳海槽---弧后背景下大陆张裂的最高阶段.海洋地质与第四纪地质,21(1):51-55.
Gungor,A.,Lee,G.H.,Kim,H.J.,et al.,2012.Structural Characteristics of the Northern Okinawa Trough and Adjacent Areas from Regional Seismic Reflection Data:Geologic and Tectonic Implications.Tectonophysics,522-523:198-207.https://doi.org/10.1016/j.tecto.2011.11.027
Guo,K.,Zhai,S.K.,Yu,Z.H.,et al.,2016.Determination and Tectonic Significance of Volcanic Rock Series in the O-kinawa Trough.Earth Science,41(10):1655-1664(in Chinese with English abstract).https://doi.org/10.3799/dqkx.2016.524
Halbach,P.,Nakamura,K.I.,Wahsner,M.,et al.,1989.Probable Modern Analogue of Kuroko-Type Massive Sulphide Deposits in the Okinawa Trough Back-Arc Basin.Nature,338(6215):496-499.https://doi.org/10.1038/338496a0
Jiang,Y.M.,He,X.J.,Zhang,S.L.,2016.The Characteristics of“Inverse-Transform”Tectonic Migration Evolution of the East China Sea Shelf Basin-By Taking the Marginal Structure of Xihu Sag for Example.Journal of Yangtze University(Natural Science Edition),13(26):1-7(in Chinese with English abstract).
Jin,X.L.,Yu,P.Z.,1987.Structural Characteristics and Evolution of the Okinawa Trough.Scientia Sinica Chimica,(2):196-203(in Chinese).
Kato,Y.,1987.The Location and Amount of Volcanic Deposits in the West of the Ryukyu Islands.In:Information Office of the Marine Geological Survey,ed.,The Geology of Ryukyu Islands,Okinawa Trough and Diaoyu Islands(Translation Set).The Marine Geological Survey of Bureau of Geology and Mineral Resources,Shanghai,61-68(in Chinese).
Kimura,M.,1987.The Formation of Okinawa Trough Graben.In:Information Office of the Marine Geological Survey,ed.,The Geology of Ryukyu Islands,Okinawa Trough and Diaoyu Islands(Translation Set).The Marine Geological Survey of Bureau of Geology and Mineral Resources,Shanghai 23-40(in Chinese).
Kong,F.C.,Lawver,L.A.,Lee,T.Y.,2000.Evolution of the Southern Taiwan-Sinzi Folded Zone and Opening of the Southern Okinawa Trough.Journal of Asian Earth Sciences,18(3):325-341.https://doi.org/10.1016/s1367-9120(99)00062-0
Lee,C.S.,Shor Jr,G.G.,Bibee,L.D.,et al.,1980.Okinawa Trough:Origin of a Back-Arc Basin.Marine Geology,35(1-3):219-241.https://doi.org/10.1016/0025-3227(80)90032-8
Li,C.F.,Chen,B.,Zhou,Z.Y.,2009.Deep Crustal Structures of Eastern China and Adjacent Seas Revealed by Magnetic Data.Scientia Sinica Terrae,39(12):1770-1779(in Chinese).
Li,G.Q.,Li,X.L.,1995.Geological Tectonic Characteristics of the Outer Margin Upwarped Zone of the East China Sea Shelf.Journal of Ocean University of Qingdao,25(2):199-205(in Chinese with English abstract).
Li,N.S.,Jiang,L.L.,Li,C.Z.,1998.A Study on the Nature of Crustal Structures of the Okinawa Trough.Oceanologia et Limnologia Sinica,29(4):441-450(in Chinese with English abstract).
Li,X.Q.,Liu,J.S.,Lu,Y.C.,et al.,2018.Prototype Basin Characterization of Huagang Formation of Xihu Depression,East China Sea Shelf Basin.Earth Science,43(2):502-513(in Chinese with English abstract).https://doi.org/10.3799/dqkx.2017.596
Liu,G.D.,Xu,W.L.,1989.Geological and Geophysical Characteristics of China Sea and Its Adjacent Areas.Science Press,Beijing(in Chinese).
Matsumoto,O.,1987.Geology and Intrusive Rocks of Diaoyu Island,North Island and South Island.In:Information Office of the Marine Geological Survey,ed.,The Geology of Ryukyu Islands,Okinawa Trough and Diaoyu Islands(Translation Set).The Marine Geological Survey of Bureau of Geology and Mineral Resources,Shanghai 80-97(in Chinese).
Sun,Z.C.,2004.Progress of Petroleum Geology Research for the East China Sea and on Tectonic Evolution of Cenozoic Basins in the Continental Margins along the West Pacific Ocean:An Evolutional Model of OceanwardsReceding Residual Rear-Arc Basins.Marine Origin Petroleum Geology,9(1-2):1-17(in Chinese with English abstract).
Wang,P.,Liang,J.S.,Zhang,Z.G.,et al.,2012.Diaoyu Islands Folded-Uplift Belt Evolution Characteristics and Its Importance on the Hydrocarbon Exploration in East China Sea Basin.Petroleum Geology and Engineering,26(6):10-14(in Chinese with English abstract).
Wang,P.,Zhao Z.G.,Zhang,G.C.,et al.,2011.Analysis on Structural Evolution in Diaoyu Islands Folded-Uplift Belt,East China Sea Basin and Its Impact on the Hydrocarbon Exploration in Xihu Sag.Geological Science and Technology Information,30(4):65-72(in Chinese with English abstract).
Yang,W.D.,Cui,Z.K.,Zhang,Y.B.,2010.Geology and Mineral Resources of East China Sea.China Ocean Press,Beijing(in Chinese).
Zhao,Z.G.,Wang,P.,Qi,P.,et al.,2016.Regional Background and Tectonic Evolution of East China Sea Basin.Earth Science,41(3):546-554(in Chinese with English abstract).https://doi.org/10.3799/dqkx.2016.045
Zhou,Z.Y.,Liao,Z.T.,Jin,X.C.,et al.,2001.Okinawa Trough:The Highest Stage of Continental Tension Rifting in Back Arc Setting.Marine Geology&Quaternary Geology,21(1):51-55(in Chinese with English abstract).
陈沪生,张永鸿,徐师文,等,1999.下扬子及邻区岩石圈结构构造特征与油气资源评价.北京:地质出版社.
国坤,翟世奎,于增慧,等,2016.冲绳海槽火山岩岩石系列的厘定及构造环境意义.地球科学,41(10):1655-1664.https://doi.org/10.3799/dqkx.2016.524
加藤佑三,1987.琉球群岛西表海底火山的位置和喷发物数量.见:海洋地质调查局情报资料室编译,琉球群岛、冲绳海槽、钓鱼岛地质(译文集).上海:地质矿产部海洋地质调查局,61-68.
蒋一鸣,何新建,张绍亮,2016.东海陆架盆地“反转改造”构造迁移演化特征---以西湖凹陷边缘构造为例.长江大学学报(自科版),13(26):1-7.
金翔龙,喻普之,1987.冲绳海槽的构造特征与演化.中国科学(B辑),(2):196-203.
李春峰,陈冰,周祖翼,2009.中国东部及邻近海域磁异常数据所揭示的深部构造.中国科学:地球科学,39(12):1770-1779.
李桂群,李学伦,1995.东海陆架外缘隆起带地质构造特征.青岛海洋大学学报,25(2):199-205.
李乃胜,姜丽丽,李常珍,1998.冲绳海槽地壳结构的研究.海洋与湖沼,29(4):441-450.
李祥权,刘金水,陆永潮,等,2018.东海陆架盆地西湖凹陷花港组原型盆地性质厘定.地球科学,43(2):502-513.https://doi.org/10.3799/dqkx.2017.596
刘光鼎,许薇龄,1989.中国海区及邻域地质地球物理特征.北京:科学出版社.
木村政昭,1987.冲绳海槽地堑的形成.见:海洋地质调查局情报资料室编译,琉球群岛、冲绳海槽、钓鱼岛地质(译文集).上海:地质矿产部海洋地质调查局,23-40.
松本征夫,1987.钓鱼岛、北小岛、南小岛的地质及侵入岩类.见:海洋地质调查局情报资料室编译,琉球群岛、冲绳海槽、钓鱼岛地质(译文集).上海:地质矿产部海洋地质调查局,80-97.
孙肇才,2004.从东海石油地质重要进展看西太平洋大陆边缘新生代盆地的构造演化---种海沟向洋后退的残余弧后盆地演化模式.海相油气地质,9(1-2):1-17.
王鹏,梁建设,赵志刚,等,2012.钓鱼岛隆褶带演化特征及其对东海盆地油气勘探的意义.石油地质与工程,26(6):10-14.
王鹏,赵志刚,张功成,等,2011.东海盆地钓鱼岛隆褶带构造演化分析及对西湖凹陷油气勘探的意义.地质科技情报,30(4):65-72.
杨文达,崔征科,张异彪,2010.东海地质与矿产.北京:海洋出版社.
赵志刚,王鹏,祁鹏,等,2016.东海盆地形成的区域地质背景与构造演化特征.地球科学,41(3):546-554.https://doi.org/10.3799/dqkx.2016.045
周祖翼,廖宗廷,金性春,等,2001.冲绳海槽---弧后背景下大陆张裂的最高阶段.海洋地质与第四纪地质,21(1):51-55.