“大东海”中生代地层分布——值得关注的新领域
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摘要
以近几年重处理和新采集的地震剖面资料为基础,采用地震、钻井、重磁反演及海陆对比等综合研究方法,研究了东海陆架盆地南部中生界分布特征。前人划分的新生代3个凸起(雁荡、台北、观音)在中生代时表现为雁荡凸起从北至南并非是一个连续的凸起,而是由3个呈雁列式排列的元古界古凸起组成,向南消失;观音凸起和台北凸起上中生界厚度稳定;研究结果表明,东海陆架盆地南部中生界"分布广、厚度大"、"南厚北薄、东厚西薄",结合周边中生界分布特征提出了"大东海"(中生界)盆地这一新概念。
Based on the latest re-processed and newly acquired seismic data and using the integrated approaches including seismic,well drilling,inverse gravity and magnetic processing and land sea correlation,we studied the distribution of the Mesozoic in the southern East China Sea Shelf Basin,and got some new understandings about the three uplifts,namely the Yandang,Taibei and Guanyin uplifts,defined by previous studies.It is found that the Yandang Uplift is in fact not a continuously uplift from north to south,but an old Proterozoic uplift made up of three en echelon uplifts,which disappear southward.Mesozoic strata occur steadily on both the Guanyin and Taibei uplifts.Our results show that the Mesozoic strata in the Southern East China Sea Shelf Basin are quite thick and widely distributed.According to our data,it is thicker in the south and east,and thinner in the north and west.In this regard,the concept of Mesozoic Great East China Sea is proposed in this paper to conclude the new discoveries.
Based on the latest re-processed and newly acquired seismic data and using the integrated approaches including seismic,well drilling,inverse gravity and magnetic processing and land sea correlation,we studied the distribution of the Mesozoic in the southern East China Sea Shelf Basin,and got some new understandings about the three uplifts,namely the Yandang,Taibei and Guanyin uplifts,defined by previous studies.It is found that the Yandang Uplift is in fact not a continuously uplift from north to south,but an old Proterozoic uplift made up of three en echelon uplifts,which disappear southward.Mesozoic strata occur steadily on both the Guanyin and Taibei uplifts.Our results show that the Mesozoic strata in the Southern East China Sea Shelf Basin are quite thick and widely distributed.According to our data,it is thicker in the south and east,and thinner in the north and west.In this regard,the concept of Mesozoic Great East China Sea is proposed in this paper to conclude the new discoveries.
引文
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[10]赵英杰,郭艳东.东海陆架盆地瓯江凹陷古近系层序地层学与沉积特征研究[J].海洋石油,2010,30(4):15-31.[ZHAO Yingjie,GUO Yandong.Research on sequence stra-tigraphy and depositional features of Paleogene system of Ou-jiang Sag in the East China Sea[J].Offshore Oil,2010,30(4):15-31.]
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[2]Li Sanzhong,Santosh M.Evolution of Asian continent and itscontinental margins[J].Journal of Asian Earth Sciences,2012,47:1-4.
[3]LI Sanzhong,ZHAO Guochun,DAI Liming,et al.Mesozoicbasins in eastern China and their bearings on the deconstruc-tion of the north China craton[J].Journal of Asian Earth Sci-ences,2012,47:64-79.
[4]杨文达,崔征科,张异彪.东海地质与矿产[M].北京:海洋出版社,2010.[YANG Wenda,CUI Zhengke,ZHANG Yibi-ao.Geology and Mineral of East China Sea[M].Beijing:ChinaOcean Press,2010.]
[5]吕炳全,王红罡,李维显.东海陆架油气勘探的新领域[J].古地理学报,2002,4(2):88-97.[LV Bingquan,WANGHonggang,LI Weixian.New areas of the oil and gas explora-tion in the East China Sea[J].Journal of Palaeogeography,2002,4(2):88-97.]
[6]高乐.东海陆架中生代残余盆地特征及勘探方向探讨[J].中国海上油气(工程),2005,17(3):148-152.[GAO Le.Meso-zoic remnant basin characteristics and hydrocarbon explorationdirection on East China Sea shelf[J].China Offshore Oil andGas,2005,17(3):148-152.]
[7]刘建华,黎明碧,方银霞.东海陆架盆地海相中生界及其与邻近古海洋关系探讨[J].热带海洋学报,2005,24(2):1-7.[LIU Jianhua,LI Minbi,FANG Yinxia.Mesozoic strata inEast China Sea shelf basin and their relationship with adjacentpalaeo-seas[J].Journal of Tropical Oceanography,2005,24(2):1-7.]
[8]唐建.东海及邻近地区中生代沉积地层展布研究[D].同济大学,2007.[TANG Jian.Study on the Mesozoic SedimentaryStrata Distribution of East China and Adjacent Areas[D].Tongji University,2007.]
[9]段九春,赵英杰,米慧芬.东海陆架盆地南部中生界及古近系层序地层格架[J].洁净煤技术,2010,16(6):100-104.[DU-AN Jiuchun,ZHAO Yingjie,MI Huifen.Sequence-strati-graphic framework on Mesozoic and Paleogene of the East Chi-na Sea shelf basin[J].Clean Coal Technology,2010,16(6):100-104.]
[10]赵英杰,郭艳东.东海陆架盆地瓯江凹陷古近系层序地层学与沉积特征研究[J].海洋石油,2010,30(4):15-31.[ZHAO Yingjie,GUO Yandong.Research on sequence stra-tigraphy and depositional features of Paleogene system of Ou-jiang Sag in the East China Sea[J].Offshore Oil,2010,30(4):15-31.]
[11]Yen T P.The Mesozoic formation in the Ryukyus-Taiwan-Philippine region[C]//Preoceedings of the Geological Societyof China,1982:111-121.
[12]李家彪.中国边缘海形成演化与资源效应[M].北京:海洋出版社,2008.[LI Jiabiao.Marginal Sea Formation and Evolu-tion of Resource Effects in China[M].Beijing:China OceanPress,2008.]
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