南黄海中西部晚更新世沉积地层结构及其意义
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摘要
利用1992-1993航次和1999航次获得的2000多公里的浅地层剖面资料,结合QC2钻孔岩芯的测年数据,对南黄海中西部海域晚更新世沉积地层结构进行了分析,并对地层进行了地质年代标定。研究结果表明,南黄海中西部晚更新统可划分出8个地震地层单元(U1～U8),它们所反映的相对海平面变化与全球海平面变化基本上相一致。根据沉积厚度、QC2孔岩心和地震反射结构特征推测,晚更新世早期(氧同位素5e)QC2孔附近区域发育古长江水下三角洲;而晚更新世中期(氧同位素3期),研究区西部也发育古三角洲沉积,究竟是古长江还是古黄河形成的还有待于进一步研究。南黄海北部盆地边界断层的构造活动一直延续到全新世初期,在一定程度上影响了来自西部沉积物的空间分布特征,并对晚更新世海平面上升时岸线向陆的推进、大面积湖泊的形成起了重要作用。
Based on more than 2 000 km of subbottom profiling data collected during 1992 to 1993 cruise and 1999 cruise and the dating data of sediment from core QC2, the late Pleistocene sedimentary stratigraphic structure in the central and western areas of southern Yellow Sea was analysed, and the geological ages of different strata were determined. It is shown from the study results that the late Pleistocene stratum in the central and western areas of southern Yellow Sea can be divided into 8 seismic stratigraphic units (U1 to U8), and the relative sealevel changes reflected by 8 units are basically consistent with the global sealevel changes. It is inferred from the sediment thickness, sediment structure of core QC2 and seismic reflection structure that the paleoYangtze River submerged delta was developed in core QC2 neighboring area during the early stage of late Pleistocene (about oxygen isotope period 5e); the paleodelta was developed in the western study area during the middle stage of late Pleistocene, but whether it is paleoYangtze River delta or paleoYellow River deta remains to be further studied. The tectonic activities of boundary faults of the northern basin of socthern Yellow Sea lasted until the early Holocene to influence the spatial distribution characteristics of sediment coming from the west and to play an important role in the shoreward advance of paleoshoreline and the formation of extensive lake during the transgression in late Pleistocene.
Based on more than 2 000 km of subbottom profiling data collected during 1992 to 1993 cruise and 1999 cruise and the dating data of sediment from core QC2, the late Pleistocene sedimentary stratigraphic structure in the central and western areas of southern Yellow Sea was analysed, and the geological ages of different strata were determined. It is shown from the study results that the late Pleistocene stratum in the central and western areas of southern Yellow Sea can be divided into 8 seismic stratigraphic units (U1 to U8), and the relative sealevel changes reflected by 8 units are basically consistent with the global sealevel changes. It is inferred from the sediment thickness, sediment structure of core QC2 and seismic reflection structure that the paleoYangtze River submerged delta was developed in core QC2 neighboring area during the early stage of late Pleistocene (about oxygen isotope period 5e); the paleodelta was developed in the western study area during the middle stage of late Pleistocene, but whether it is paleoYangtze River delta or paleoYellow River deta remains to be further studied. The tectonic activities of boundary faults of the northern basin of socthern Yellow Sea lasted until the early Holocene to influence the spatial distribution characteristics of sediment coming from the west and to play an important role in the shoreward advance of paleoshoreline and the formation of extensive lake during the transgression in late Pleistocene.
引文
国家海洋局第一海洋研究所 .中国海域沉积层厚度与结构及其形成机制研究报告 . 2 0 0 1 .
国家海洋局第一海洋研究所 .南黄海晚更新世末期以来的沉积环境及物质来源报告 . 1 995.
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[16] YangZGandLinHM.AstudyoftheancientcoldwatermasssedimentsinthesouthernYellowSeaduringthelastinterglaciation[J].MarineGeology&QuaternaryGeology,1998,18(1):47-58.杨子赓,林和茂.对末次间冰期南黄海古冷水团沉积的探讨[J].海洋地质与第四纪地质,1998,18(1):47-58.
[17] ZhengGY.QuaternaryStratigraphicCorrelationintheSouthernYellowSea[M].Beijing:SciencePress,1989.郑光膺.南黄海第四纪地层对比[M].北京:科学出版社,1989.
[18] ZhengGY.QuaternaryGeologyoftheYellowSea[M].Beijing:SciencePress,1991.郑光膺.黄海第四纪地质[M].北京:科学出版社,1991.
[19] ChiocciFL.Veryhigh-resolutionseismicasatoolforsequencestratigraphyappliedtooutcropscaleexamplesfromeasternTyrrhenianmarginHolocene-Pleistocenedeposits[J].AAPGBulletin,1994,78(3):378-395.
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国家海洋局第一海洋研究所 .南黄海晚更新世末期以来的沉积环境及物质来源报告 . 1 995.
[1] YangZG.SedimentationandenvironmentontheshelfofsouthernYellowSeasincelatePleistocene.[J].MarineGeology&QuaternaryGeology,1985,5(4):1-19.杨子赓.南黄海陆架晚更新世以来的沉积及环境[J].海洋地质与第四纪地质,1985,5(4):1-19.
[2] LiuMH,WuSYandWangYJ.LateQuaternarySedimentoftheYellowSea[M].Beijing:OceanPress,1987.刘敏厚,吴世迎,王永吉.黄海晚第四纪沉积[M].北京:海洋出版社,1987.
[3] QinYS,ZhaoYY,ChenLR,etal.TheYellowSeaGeology[M].Beijing:OceanPress,1989.秦蕴珊,赵一阳,陈丽蓉,等.黄海地质[M].北京:海洋出版社,1989.
[4] GuanCZandQuXH.Thermoluminescencedatingandstratigraphicdivisionof4sedimentarycoresfromthesouthernYellowSea[J].MarineSciences,1991,(5):49-52.官晨钟,曲秀华.南黄海4个沉积岩芯的热释光测年及地层划分[J].海洋科学,1991,(5):49-52.
[5] ZhaoYYandChenYW.SourceandGenesisofmudinthecentralsouthernYellowSea[J].Geochimica,1991,(2):112-117.赵一阳,陈毓蔚.试论南黄海中部泥的物源及成因[J].地球化学,1991,(2):112-117.
[6] ChenBZandLiCX.StudyonHolocenesedimentationinthesouthernlandareaofthesouthernYellowSea[J].ActaSedimentologicaSinica,1994,12(2):65-71.陈报章,李从先.南黄海南部陆区全新世沉积研究[J].沉积学报,1994,12(2):65-71.
[7] WangJandYangHR.TransferfunctionandwaterdepthchangesinthesouthernYellowSeainthelast130000years[J].ScientiaGeo-graphicaSinica,1995,15(4):321-326.王 建,杨怀仁.转换函数与南黄海13万年来海水深度的变化[J].地理科学,1995,15(4):321-326.
[8] LiFYandShiYL.IsotopicrecordofmodernsedimentaryenvironmentinthesouthernYellowSea[J].OceanologiaetLimnologiaSini-ca,1996,27(6):584-589.李凤业,史玉兰.同位素记录南黄海现代沉积环境[J].海洋与湖沼,1996,27(6):584-589.
[9] ShenSXandLiAC.LowenergysedimentaryenvironmentofthecentralsouthernYellowSea[J].OceanologiaetLimnologiaSinica,1996,27(5):518-523.申顺喜,李安春.南黄海中部的低能沉积环境[J].海洋与湖沼,1996,27(5):518-523.
[10] MengGLandHanYS.PaleoclimateeventsandenvironmentevolutionoftheshelfareainthesouthernYellowSeaduringthepast15ka[J].OceanologiaetLimnologiaSinica,1998,29(3):297-305.孟广兰,韩有松.南黄海陆架区15ka以来的古气候事件与环境演变[J].海洋与湖沼,1998,29(3):297-305.
[11] ShiXF,ShenSX,YiHI,etal.Modernsedimentaryenvironmentanddynamicdepositsystem[J].ChineseScienceBulletin,46(Supple-ment):1-6.石学法,申顺喜,YiHI,等.南黄海现代沉积环境及动力沉积体系[J].科学通报,46(增刊):1-6.
[12] YangZGandLinHM.QuaternaryPrescessandEventsinChineseOffshoreandCoastalAreas[M].Beijing:OceanPress,1989.杨子赓,林和茂.中国近海及沿海地区第四纪进程与事件[M].北京:海洋出版社,1989.
[13] YangZG.Sedimentarysequenceandpalaeo-geographicchangesinthesouthernYellowSeasinceOlduvaievent.[J].ActaGeologiaSinica,1993,67(4):357-336.杨子赓.Olduvai期以来南黄海沉积层序及古地理变迁[J].地质学报,1993,67(4):357-336.
[14] YangZGandLinHM.QuaternarystratigraphiccorrelationbetweenChinaanditsadjacentarea[J].MarineGeology&QuaternaryGe-ology,1993,13(3):1-15.杨子赓,林和茂.中国与邻区第四纪地层对比[J].海洋地质与第四纪地质,1993a,13(3):1-15.
[15] YangZGandLinHM.QuaternaryStratigraphyofChinaandItsInternationalCorrelation[M].Beijing:GeologicalPublishingHouse,1996.杨子赓,林和茂.中国第四纪地层与国际对比[M].北京:地质出版社,1996.
[16] YangZGandLinHM.AstudyoftheancientcoldwatermasssedimentsinthesouthernYellowSeaduringthelastinterglaciation[J].MarineGeology&QuaternaryGeology,1998,18(1):47-58.杨子赓,林和茂.对末次间冰期南黄海古冷水团沉积的探讨[J].海洋地质与第四纪地质,1998,18(1):47-58.
[17] ZhengGY.QuaternaryStratigraphicCorrelationintheSouthernYellowSea[M].Beijing:SciencePress,1989.郑光膺.南黄海第四纪地层对比[M].北京:科学出版社,1989.
[18] ZhengGY.QuaternaryGeologyoftheYellowSea[M].Beijing:SciencePress,1991.郑光膺.黄海第四纪地质[M].北京:科学出版社,1991.
[19] ChiocciFL.Veryhigh-resolutionseismicasatoolforsequencestratigraphyappliedtooutcropscaleexamplesfromeasternTyrrhenianmarginHolocene-Pleistocenedeposits[J].AAPGBulletin,1994,78(3):378-395.
[20] XuDY,LiuXQ,ZhangXH,etal.ChinaOffshoreGeology[M].Beijing:GeologicalPublishingHouse,1997.许东禹,刘锡清,张训华,等.中国近海地质[M].北?
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