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地球科学进展  2007, Vol. 22 Issue (9): 907-913    DOI: 10.11867/j.issn.1001-8166.2007.09.0907
IODP研究     
深水沉积物波及其在南海研究之现状
钟广法1,李前裕1,郝沪军2,王嘹亮3
1.同济大学海洋地质国家重点实验室,上海 200092;2.中海石油(中国)有限公司深圳分公司,深圳 518067;3.广州海洋地质调查局,广东 广州 510760
Current Status of Deep-water Sediment Wave Studies and the South China Sea Perspectives
ZHONG Guang-fa1, LI Qian-yu1, HAO Hu-jun2, WANG Liao-liang3
1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China;2. Shenzhen Branch of CNOOC Limited, Shenzhen 518067, China;3.Guangzhou Marine Geological Survey, Guangzhou 510760, China
 全文: PDF(329 KB)  
摘要:

深水沉积物波的研究始于20世纪50年代。根据成因和结构特征,可以将深水沉积物波划分为细粒底流、细粒浊流、粗粒底流和粗粒浊流等类型。不同类型的沉积物波具有不同的形态、物质组成及分布特征。已提出的深水沉积物波的形成模式主要有背流波模式、逆行沙波模式、内波模式及底形和斜坡失稳混合模式等。1994年太阳号95航次和1999年ODP184航次揭示并证实,南海北部东沙岸外1144站所处的深水陆坡区发育有一高速沉积物牵引体。根据最新的地震资料分析发现,该牵引体实际上由一系列逆陆坡向上倾方向迁移的沉积物波组成,这一发现对于南海北部大陆边缘古海洋、古环境和古气候研究,以及南海深水油气勘探具有重要意义。

关键词: 深水沉积物波底流沉积浊流沉积沉积物牵引体南海ODP 184航次    
Abstract:

Research on deep-water sediment waves was initiated in the 1950's. So far, significant progress has been achieved. It is been known that deep-water sediment waves are generated mainly by bottom currents or turbidity currents. Four main catalogues of deep-water sediment waves have been recognized according to their grain size of component sediments and formation processes: fine-grained bottom current sediment waves, coarse-grained bottom current sediment waves, finegrained turbidity current sediment waves, and coarse-grained turbidity current sediment waves. Models presented for the formation of deep-water sediment waves include lee-wave model, antidune model, internal wave model and mixed bedform and failure model. Newly-acquired high-resolution seismic data revealed that the sediment drift with high deposition rates on the slope offshore Dongsha Islands, northern South China Sea was actually composed of a series of sediment waves migrated upslope. This finding is of great significance not only to the reconstruction of paleoceanography, paleoenvironment, paleo-tectonics, and paleoclimate, but also to deep-water petroleum exploration in the South China Sea.

Key words: Deep-water sediment waves    Bottom current deposition    Turbidity current deposition    Sediment drift    South China sea    ODP Leg 184.
收稿日期: 2007-06-04 出版日期: 2007-09-10
:  P736.21  
基金资助:

国家自然科学基金项目“南海深海测井记录中的气候周期和事件”(编号:40476030)和“晚中新世西太平洋暖池阶段性形成的古海洋特征”(编号:40576031);国家高技术研究发展计划项目“大洋钻探技术预研究”(编号:2004AA615030)联合资助.

通讯作者: 钟广法(1964-),男,湖南临澧人,教授,博士生导师,主要从事地震、测井解释和沉积学研究.E-mail:gfz@mail.tongji.edu.cn     E-mail: gfz@mail.tongji.edu.cn
作者简介: 钟广法(1964-),男,湖南临澧人,教授,博士生导师,主要从事地震、测井解释和沉积学研究.E-mail:gfz@mail.tongji.edu.cn
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引用本文:

钟广法,李前裕,郝沪军,王嘹亮. 深水沉积物波及其在南海研究之现状[J]. 地球科学进展, 2007, 22(9): 907-913.

ZHONG Guang-fa, LI Qian-yu, HAO Hu-jun, WANG Liao-liang. Current Status of Deep-water Sediment Wave Studies and the South China Sea Perspectives. Advances in Earth Science, 2007, 22(9): 907-913.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2007.09.0907        http://www.adearth.ac.cn/CN/Y2007/V22/I9/907

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