南海北部深水底流沉积作用
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摘要
南海北部深水陆坡区存在极为活跃的深水底流沉积作用.通过浅地层地震剖面解释发现,该地区由于深水底流的搬运作用,在水深1000~2700m左右的陆坡地带形成NE-SW向分布的迁移水道.在水道东侧断续形成由东北向西南方向推进的高沉积速率堆积体,堆积体内部叠加层呈NE-SW向前积堆积特征,由牵引流沉积而成.发育在东沙群岛东南侧的高沉积速率堆积体就是其中之一,其12ka以来沉积速率高达97cm/ka,是南海目前所知沉积速率最高的海区.地震剖面显示,该深水底流极有可能是由进入南海的西太平洋环流演变而成,挟带南海北部来源的沉积物沿大陆坡由东北向西南方向搬运沉积,最终消失在中央海盆中.由于深水底流作用的存在,造成南海北部深海区复杂的搬运沉积格局.
引文
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23黄奇瑜,主编.台湾大地构造.台北:言儒出版社,2002.1—207
24陈建芳,郑连福,陈荣华,等.南海颗粒物质的通量、组成及其与沉积物积累率的关系初探.沉积学报,1998,16(3):14—19
25Faugeres J C,Mézerais M L,Stow D A V.Contourite drift types and their distribution in the North and South Atlantic Ocean basins.Sediment Geol,1993,82:189—203
26McCave I N,Lonsdale R E,Hollister C D,et al.Sediment trans-port over the Hatton and Gardar contourite drifts.J Sediment Pet-rol,1980,50(4):1049—1062
27Rhein M,Stramma L,Send U.The deep western boundary current:water masses and transport.J Geophys Res,1995,100(C2):2441—2458
28Robinson S G,McCave I N.Orbital forcing of bottom current en-hanced sedimentation on Feni Drift,NE Atlantic,during the mid-Pleistocene.Paleoceanography,1994,9(6):943—972
2Shanmugam G,Spalding T D,Rofheart D H.Processes sedimen-tology and reservoir quality of deep-marine bottom-current re-worked sands(sandy contourites):an example from the Gulf of Mexico.Am Assoc Pet Geol Bull,1993,77(7):1241—1259
3Viana A R,Faugères J C,Kowsmann R O,et al.Hydrology,mor-phology and sedimentology of the Campos continental margin,offshore Brazil.Sediment Geol,1998,115:133—157
4Stow D A V,Faugères J C,Viana A,et al.Fossil contourites:a critical review.Sediment Geol,1998,115:3—31
5Stow D A V,Mayall M.deep-water sedimentary systems:new models for the21st Century.Mar Pet Geol,2000,17:125—135
6Lobo F J,Hernández F J,Somoza L,et al.Patterns of bottom cur-rent flow deduced from dune asymmetries over the Gulf of Cadiz shelf(southwest Spain).Mar Geol,2000,164:91—117
7Uenzelmann-Neben G.Seismic characteristics of sediment drifts:an example from the Agulhas Plateau,southwest Indian Ocean.Mar Geophys Res,2001,22:323—343
8Schut E W,Uenzelmann-Neben G,Gersonde R.Seismic evidence for bottom current activity at the Agulhas Ridge.Glob Planet Change,2002,34:185—198
9Sarnthein M,Pflaumann U,Wang P X,et al,eds.Preliminary re-port on Sonne-95cruise“monitor monsoon”to the South China Sea.Reports,Geol-Palaont Inst Uni Kiel,68.1994,1—205
10Wang L,Sarenthein M,Erlenkeuser H,et al.East Asian monsoon climate during the late Pleistocene:high-resolution sediment re-cords from the South China Sea.Mar Geol,1999,156:254—284
11Wang P X,Prell W L,Blum P,et al.Proceedings of the Ocean Drilling Program,initial reports South China Sea,Vol184,Texas A&M University.Science Paerator,College Station TX,2000.18—20
12邹磊,李献华,韦刚健,等.南海陆坡高速堆积体的物质来源.中国科学D辑:地球科学,2001,31(10):828—833
13Wei G,Liu Y,Li X H,et al.Major and trace element variations of the sediments at ODP Site1144,South China Sea,during the last230ka and their paleoclimate implications.Paleogeogr Paleocli-matol Paleoecol,2004,212:331—342
14Buehring C,Sarnthein M,Erlenkeuser Helmut.Toward a high-resolution stable isotope startigraphy of the last1.1million years:site1144,South China Sea.In:Prell W L,Wang P,Blum P,et al,eds.Proc ODP,Sci Results,Vol184,Texas A&M University.Science Perator,College Station TX,2004.1—29
15Wyrtki K.Scientific results of marine investigations of the South China Sea and the Gulf of Thailand1959~1961,Naga Rep,Univ of California at San Diego,1961,2:1—195
16李立,吴日升,郭小钢.南海的季节环流—TOPEX/POSEI-DON卫星测高应用研究.海洋学报,2000,22(6):13—26
17张蕴斐,张占海,吴辉碇,等.黑潮环流的数值模拟.海洋学报,2003,25(3):120—128
18杨海军,刘秦玉.南海海洋环流研究综述.地球科学进展,1998,13(4):364—368
19Chao S Y,Shaw P T,Wu S Y.Deep water ventilation in the South China Sea.Deep Sea Res,PartⅠ,1996,43:445—466
20Sun X,Li X,Beug H J.Pollen distribution in hemipelagic surface sediments of the South China Sea and its relation to modern vege-tation distribution.Mar Geol,1999,156:211—226
21Luedmann T,Wong H K,Wang P X.Plio–Quaternary sedimenta-tion processes and neotectonics of thenorthern continental margin of the South China Sea.Mar Geol,2001,172:331—358
22Luedmann T,Wong H K,Berglar K.Upward flow of North Pacific Deep Water in the northern South China Sea as deduced from the occurrence of drift sediments.Geophys Res Lett,2005,32:L05614
23黄奇瑜,主编.台湾大地构造.台北:言儒出版社,2002.1—207
24陈建芳,郑连福,陈荣华,等.南海颗粒物质的通量、组成及其与沉积物积累率的关系初探.沉积学报,1998,16(3):14—19
25Faugeres J C,Mézerais M L,Stow D A V.Contourite drift types and their distribution in the North and South Atlantic Ocean basins.Sediment Geol,1993,82:189—203
26McCave I N,Lonsdale R E,Hollister C D,et al.Sediment trans-port over the Hatton and Gardar contourite drifts.J Sediment Pet-rol,1980,50(4):1049—1062
27Rhein M,Stramma L,Send U.The deep western boundary current:water masses and transport.J Geophys Res,1995,100(C2):2441—2458
28Robinson S G,McCave I N.Orbital forcing of bottom current en-hanced sedimentation on Feni Drift,NE Atlantic,during the mid-Pleistocene.Paleoceanography,1994,9(6):943—972
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