琼东南盆地陆坡体系发育特征及其控制因素Depositional Characteristics and Controlling Factors of Continental Slope System in the Qiongdongnan Basin
何云龙;解习农;李俊良;张成;苏明;
摘要(Abstract)：
琼东南盆地位于南海北部大陆边缘,是发育于前古近系基底之上的裂陷盆地,自中新世以来进入裂后沉降期。10.5Ma以来,随着盆地演化进入加速沉降阶段,盆地水深迅速增大,陆坡体系开始发育。根据陆坡体系的外部形态及其内部沉积构成特征,在空间上自西向东可以将其划分为3段,盆地西部陆坡以快速进积的陆坡楔状体为主要特征;盆地中部陆坡以陡倾的陆坡角度,大量的陆坡峡谷、沟谷和大规模的沉积物重力流等陆坡沉积为特征;盆地东部陆坡以宽缓的陆坡形态为主要特征。研究表明,沉积物供给和断裂活动对陆坡体系的发育都具有重要的控制作用;同时,陆坡发育时期所经历的沉积过程、古地貌形态和相对海平面变化对陆坡体系的发育也具有一定的控制作用。
关键词(KeyWords)： 陆坡体系;控制作用;琼东南盆地;南中国海
基金项目(Foundation): 国家重点基础研究发展计划“973”项目(2007CB411705-06);; 中国地质大学构造与油气资源教育部重点实验室开放研究基金课题(TRP-2009-17)
作者(Author): 何云龙;解习农;李俊良;张成;苏明;
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参考文献(References)：
- [1]O′Grady D B,Syvitski J P M,Pratson L P,et al.Categorizing the morphologic variability of siliciclastic passive continental margins[J].Geology,2000,28(3):207-210.
- [2]Erwin WA,Schlager O.Basic types of submarine slope curva-ture[J].Journal of Sedi mentary Research,2000,70(4):814-828.
- [3]Shanmugam G.50years of the turbidite paradigm(1950s-1999s):Deep-water processes and facies models-a critical per-spective[J].Marine and Petroleum Geology,2000,17(2):174-231.
- [4]Faugeres J C,Stow D A V,I mbert P,et al.Seismic features diagnostic of contourite drifts[J].Marine Geology,1999,162:1-38.
- [5]Kathleen DS,Richard B W,Stephan A G.Evolution and stra-tigraphic architecture of marine slope gully complexes:Monterey Formation(Miocene),Gaviota Beach,California[J].Marine and Petroleum Geology,2009,26(2):269-288.
- [6]Ercilla G,Casas D,Estrada F,et al.Morphosedi mentary features and recent depositional architectural model of the Cantabrian conti-nental margin[J].Marine Geology,2008,247:61-83.
- [7]姜涛,解习农.细粒浊积体的油气地质意义[J].地质科技情报,2003,22(2):51-55.
- [8]王海荣,王英民,邱燕,等.南海北部陆坡的地貌形态及其控制因素[J].海洋学报,2008,30(2):70-79.
- [9]栾锡武,彭学超,邱燕.南海北部陆坡高速堆积体的构造成因[J].现代地质,2009,23(2):183-199.
- [10]Orton G J,Reading H G.Variability of deltaic processes in terms of sedi ment supply,with particular emphasis on grain size[J].Sedi mentology,1993,40:475-512.
- [11]Gall way WE.Siliciclastic slope and base-of-slope depositional systems:Component facies,stratigraphic architecture,and classification[J].AAPG Bulletin,1996,82:569-595.
- [12]Chen P H,Chen Z Y,Zhang Q M.Sequence stratigraphy and continental margin development of the northwestern shelf of the South China Sea[J].AAPG Bulletin,1993,77:842-862.
- [13]魏魁生,崔旱云,叶淑芬,等.琼东南盆地高精度层序地层学研究[J].地球科学:中国地质大学学报,2001,26(1):59-66.
- [14]刘铁树,何仕斌.南海北部陆缘盆地深水区油气勘探前景[J].中国海上油气:地质,2001,15(3):164-170.
- [15]庞雄,陈长民,吴梦霜,等.珠江深水扇系统沉积和周边重要地质事件[J].地球科学进展,2006,21(8):793-799.
- [16]Xie X N,Mller R D,Ren J Y,et al.Stratigraphic architecture and evolution of the continental slope systemin offshore Hain-an,northern South China Sea[J].Marine Geology,2008,247:129-144.
- [17]Catuneanu O,Abreu V,Bhattacharya J P,et al.Towards the standardization of sequence stratigraphy[J].Earth Science Re-view,2009,92(1/2):1-33.
- [18]李绪宣,朱光辉.琼东南盆地断裂系统及其油气输导特征[J].中国海上油气:工程,2005,17(1):1-7.