南海北部大陆边缘深水区下陆坡盆地沉积特征
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摘要
为了解南海北部下陆坡深水盆地的沉积特征和地层分布对构造环境的影响,利用973、SO49等航次所获得的地震测线,对南海北部大陆边缘深水区下陆坡盆地新生代地层层序进行了划分,并与北部的白云凹陷的层序进行了对比,识别出了8套地震反射层组,自上而下地层时代分别为上新世-第四纪(N2-Q)、晚中新世(N13)、中中新世(N21)、早中新世(N11)、晚渐新世(E32)、晚始新世-早渐新世(E32-E31)、中始新世(E22)和古新世-早始新世(E1-E21).在此基础上,对荔湾和潮南坳陷南部深水区内主要层组的沉积特征和沉积充填作了初步分析,认为南海中北部下陆坡区的构造演化可以分为3个阶段,分别为古新世-早渐新世的断陷-断坳陆相湖盆沉积阶段、晚渐新世的裂陷-坳陷过渡阶段以及新近系以来的热力学沉降半深水-深水沉积阶段,沉积环境经历了河流-湖泊-浅海-深海的演化过程.
The Cenozoic stratigraphic interpretation of lower continental slope in the northern South China Sea is studied and compared with Baiyun sag,to understand the sedimentary characteristics and stratigraphic distribution of deep water basin for environmental impact of construction,based on the seismic profiles acquired by SO49 and 973 cruises.The Cenozoic sediments of lower continental slope in southern Baiyun sag can be divided into eight stratas,namely,Pliocene-Quaternary,Late Miocene,Middle Miocene,Early Miocene,Late Oligocene,Late Eocene-Early Oligocene,Middle Eocene,Paleogene-Early Eocene.The tectonic evolution of lower continental slope depressions can be divided into following stages:rifting,rifting-depression transitional and depression stages,while their depositional environments change from river to shallow marine and abyssa1,which results in different topography in different stages.The topographic evolvement in the study area includes three stages,that is,Neocene to present,Late Oligocene,Early Oligocene and Paleogene.
The Cenozoic stratigraphic interpretation of lower continental slope in the northern South China Sea is studied and compared with Baiyun sag,to understand the sedimentary characteristics and stratigraphic distribution of deep water basin for environmental impact of construction,based on the seismic profiles acquired by SO49 and 973 cruises.The Cenozoic sediments of lower continental slope in southern Baiyun sag can be divided into eight stratas,namely,Pliocene-Quaternary,Late Miocene,Middle Miocene,Early Miocene,Late Oligocene,Late Eocene-Early Oligocene,Middle Eocene,Paleogene-Early Eocene.The tectonic evolution of lower continental slope depressions can be divided into following stages:rifting,rifting-depression transitional and depression stages,while their depositional environments change from river to shallow marine and abyssa1,which results in different topography in different stages.The topographic evolvement in the study area includes three stages,that is,Neocene to present,Late Oligocene,Early Oligocene and Paleogene.
引文
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郝沪军,汪瑞良,张向涛等,2004,珠江口盆地东部海相中生界识别及分布.中国海上油气(地质),16(2):84-88.
黎明碧,金翔龙,初凤友,等,2002.神狐—一统暗沙隆起中部新生代地层层序划分及沉积演化.沉积学报,20(4):545-551.
李平鲁,1993.珠江口盆地新生代构造运动.中国海上油气(地质),7(6):11-17.
柳保军,申俊,庞雄,等,2007.珠江口盆地白云凹陷珠海组浅海三角洲沉积特征.石油学报,28(2):49-56,61.
庞雄,陈长民,彭大均,等,2007.南海珠江深水扇系统及油气.北京:科学出版社,51-303.
庞雄,申俊,袁立忠,等,2006.南海珠江深水扇系统及其油气勘探前景.石油学报,27(3):11-15,21.
彭大均,陈长民,庞雄,等,2004.南海珠江口盆地深水扇系统的发现.石油学报,25(5):17-23.
秦国权,2000.珠江口盆地新生代地层问题讨论及综合柱状剖面图编制.中国海上油气(地质),14(1):21-28.
秦国权,2002.珠江口盆地新生代晚期层序地层划分和海平面变化.中国海上油气(地质),16(1):1-10,18.
杨少坤,黄丽芬,李希宗,等,1996.珠江口盆地特殊层序地层模式及其对勘探的指导意义.中国海上油气(地质),10(3):137-143,152.
Gong,Z.S.,Li,S.T.,Xie,T.J.,et al.,1997.Basin analysisand hydrocarbon accumulation in northern margin ofSouth China Sea.Science Press,Beijing,63-186(inChinese).
Hao,H.J.,Wang,R.L.,Zhang,X.T.,et al.2004.Mesozoicmarine sediment identification and distribution in theeastern Pearl River Mouth basin.China Offshore Oiland Gas(Geology),16(2):84-88.
Li,M.B.,Jin,X.L.,Chu,F.Y.,et al.,2002.Sequence division and sedimentary evolution of Cenozoic in the Middle Shenhu-Yitong Ansha uplift.Acta SedimentologicaSinica,20(4):545-551(in Chinese with English abstract).
Li,P.L.,1993.Cenozoic tectonic movement in the Pearl River Mouth basin.China Offshore Oil and Gas(Geology),7(6):11-17(in Chinese with English abstract).
Li,Q.,Jian,Z.,Li,B.,2004.Oligocene-Miocene planktonicforaminifer biostratigraphy,Site148,northern SouthChina Sea.In:Prell,W.L.,Wang,P.,Blum,P.,et al.,eds.,Proc.ODP,Sci.Results,Ocean Drilling Program,184,1-26.
Liu,B.J.,Shen,J.,Pang,X.,et al.,2007.Characteristics ofcontinental delta deposits in Zhuhai Formation ofBaiyun depression in Pearl River Mouth basin.Acta Petrolei Sinica,28(2):49-56,61(in Chinese with English abstract).
Pang,X.,Chen,C.M.,Peng,D.J.,et al.,2007.The Pearl Riverdeep-water fan system and petroleum in South China Sea.Science Press,Beijing,51-303(in Chinese).
Pang,X.,Shen,J.,Yuan,L.Z.,et al.,2006.Petroleum prospect in deep-water fan system of the Pearl River in theSouth China Sea.Acta Petrolei Sinica,27(3):11-15,21(in Chinese with English abstract).
Peng,D.J.,Chen,C.M.,Pang,X.,et al.,2004.Discovery ofdeep-water fan system in South China Sea.Acta PetroleiSinica,25(5):17-23(in Chinese with English abstract).
Qin,G.Q.,2000.Investigation to the stratigraphy and construction of the comprehensive geologic columnar section of Cenozoic formation in Pearl River Mouth basin.China Offshore Oil and Gas(Geology),14(1):21-28(in Chinese with English abstract).杨
Qin,G.Q.,2002.Late Cenozoic sequence stratigraphy andsea-level changes in Pearl River Mouth basin,SouthChina Sea.China Offshore Oil and Gas(Geology),16(1):1-10,18(in Chinese with English abstract).
Su,X.,Xu,Y.L.,Tu,Q.,2004.Early Oligocene-Pleistocenecalcareous nannofossil iostratigraphy of the northernSouth China Sea(Leg184,Sites1146-1148).In:Prell,W.L.,Wang,P.,Blum,P.,eds.,Proc.ODP,Sci.Results,College Station,184.
Yang,S.K.,Huang,L.F,Li,X.Z.,et al.,1996.Special sequential stratigraphic pattern in the Pearl River Mouthbasin and its significance to exploration.China Offshore Oil and Gas(Geology),10(3):137-143,152(inChinese with English abstract).
陈长民,施和生,许仕策,等,2003.珠江口盆地(东部)第三系油气藏形成条件.北京:科学出版社.
龚再生,李思田,谢泰俊,等,1997.南海北部大陆边缘盆地分析与油气聚集.北京:科学出版社,63-186.
郝沪军,汪瑞良,张向涛等,2004,珠江口盆地东部海相中生界识别及分布.中国海上油气(地质),16(2):84-88.
黎明碧,金翔龙,初凤友,等,2002.神狐—一统暗沙隆起中部新生代地层层序划分及沉积演化.沉积学报,20(4):545-551.
李平鲁,1993.珠江口盆地新生代构造运动.中国海上油气(地质),7(6):11-17.
柳保军,申俊,庞雄,等,2007.珠江口盆地白云凹陷珠海组浅海三角洲沉积特征.石油学报,28(2):49-56,61.
庞雄,陈长民,彭大均,等,2007.南海珠江深水扇系统及油气.北京:科学出版社,51-303.
庞雄,申俊,袁立忠,等,2006.南海珠江深水扇系统及其油气勘探前景.石油学报,27(3):11-15,21.
彭大均,陈长民,庞雄,等,2004.南海珠江口盆地深水扇系统的发现.石油学报,25(5):17-23.
秦国权,2000.珠江口盆地新生代地层问题讨论及综合柱状剖面图编制.中国海上油气(地质),14(1):21-28.
秦国权,2002.珠江口盆地新生代晚期层序地层划分和海平面变化.中国海上油气(地质),16(1):1-10,18.
杨少坤,黄丽芬,李希宗,等,1996.珠江口盆地特殊层序地层模式及其对勘探的指导意义.中国海上油气(地质),10(3):137-143,152.
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