DEPOSITION AND MIGRATION OF SEDIMENTS IN SUBMARINE CANYONS OF BAIYUN SAG AND THEIR EFFECTS ON GAS HYDRATE ACCUMULATION

WANG Zhenzhen; WANG Xiujuan; GUO Yiqun; CHEN Duanxin; WU Shiguo

doi:10.3724/SP.J.1140.2014.03105

2014 Vol. 34, No. 3

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WANG Zhenzhen, WANG Xiujuan, GUO Yiqun, CHEN Duanxin, WU Shiguo. DEPOSITION AND MIGRATION OF SEDIMENTS IN SUBMARINE CANYONS OF BAIYUN SAG AND THEIR EFFECTS ON GAS HYDRATE ACCUMULATION[J]. Marine Geology & Quaternary Geology, 2014, 34(3): 105-113. doi: 10.3724/SP.J.1140.2014.03105

Citation:

WANG Zhenzhen, WANG Xiujuan, GUO Yiqun, CHEN Duanxin, WU Shiguo. DEPOSITION AND MIGRATION OF SEDIMENTS IN SUBMARINE CANYONS OF BAIYUN SAG AND THEIR EFFECTS ON GAS HYDRATE ACCUMULATION[J]. Marine Geology & Quaternary Geology, 2014, 34(3): 105-113. doi: 10.3724/SP.J.1140.2014.03105

DEPOSITION AND MIGRATION OF SEDIMENTS IN SUBMARINE CANYONS OF BAIYUN SAG AND THEIR EFFECTS ON GAS HYDRATE ACCUMULATION

1. Key Laboratory of Marine Geology and Environment, CAS, Institute of Oceanology of Chinese Academy of Sciences, Qingdao 266071;
2. University of Chinese Academy of Sciences, Beijing 100049;
3. Guangzhou Marine Geological Survey, Guangzhou 510075

Received Date: 11 October 2013

Revised Date: 03 December 2013

Abstract

Abstract

A series of submarine canyons characterized by unidirectional sediment migration are investigated using a grid of high resolution seismic data in Baiyun Sag, northern South China Sea (NSCS). The unidirectional migrating canyon system and the dynamic bottom simulating reflectors (BSRs) are the result of the interaction between turbidity currents and bottom currents. The South China Sea Warm Current (SCSWC), an important bottom current in NSCS, is thought to be the main reason for the migration of canyons. The evolutionary history of a single canyon can be divided into three stages:erosion-dominated stage, erosion-deposition stage and the deposition-dominated stage. Four types of architecture elements consist of the fill of a single canyon, which are erosion surface (ES), basal lag (BL), mass transport deposits (MTD) and lateral inclined packages (LIP). Two distinct BSRs developed on each flank of the canyon because of the migration:the erosional flank undergoes more erosion than deposition, while the depositional flank is just the opposite. In consequence, the base of gas hydrate stability zone (BGHSZ) tends to move down on the erosional side of the canyon where sediments are removed by turbidity currents, while BGHSZ tends to move up on the depositional side where sediments become thicker.
- Baiyun Sag /
- migrating canyons /
- gas hydrate /
- dynamic BSR

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References

[1]	吴时国,秦蕴珊. 南海北部陆坡深水沉积体系研究[J]. 沉积学报,2009,27(5):922-930. Google Scholar [WU Shiguo, QING Yunshan. The research of deepwater depositional system in the Northern South China Sea[J]. Acta Sedimentologica Sinica, 2009,27(5):922-930.] Google Scholar
[2]	Daly R A. Origin of submarine canyons[J]. Am. J. Sci.,1936,31(186):401-420. Google Scholar
[3]	弗里德曼,桑德斯,徐怀大,等. 沉积学原理[M]. 科学出版社, 1987:546-558.[Sandace J E, Friceman G M. Sedimentology Principle (XU Huaida Translation)[M]. Beijing:Chinese Science Press, 1987:546 Google Scholar -558.] Google Scholar
[4]	Faugères J C,Stow D A. Bottom-current-controlled sedimentation:a synthesis of the contourite problem[J]. Sedimentary Geology,1993,82(1):287-297. Google Scholar
[5]	庞雄,陈长民,施和生,等. 相对海平面变化与南海珠江深水扇系统的响应[J]. 地学前缘,2005(3):167-177.[PANG Xiong, CHEN Changmin, SHI Hesheng, et al. Response between ralative sea-level change and the Pearl River deep-water fan system in the South China Sea[J]. Earth Science Frontiers, 2005 Google Scholar (3):167-177.] Google Scholar
[6]	Zhu M,Graham S,Pang X,et al. Characteristics of migrating submarine canyons from the middle Miocene to present:Implications for paleoceanographic circulation, northern South China Sea[J]. Marine and Petroleum Geology,2010,27(1):307-319. Google Scholar
[7]	管秉贤,陈上及. 中国近海的海流系统[C]//全国海洋综合调查报告.1964.[GUAN Bingxian, CHEN Shangji. The current system in the near-sea area of China Seas[C]//National Prehensive Ocean Survey Report, 1964.] Google Scholar
[8]	Su J,Wang W. On the sources of the Taiwan Warm Current from the South China Sea[J]. Chinese Journal of Oceanology and Limnology,1987,5(4):299-308. Google Scholar
[9]	Fang G,Wang Y,Wei Z,et al. Interocean circulation and heat and freshwater budgets of the South China Sea based on a numerical model[J]. Dynamics of Atmospheres and Oceans,2009,47(1):55-72. Google Scholar
[10]	Qu T. Upper-Layer Circulation in the South China Sea[J]. Journal of Physical Oceanography,2000,30(6):1450-1460. Google Scholar
[11]	Hu J,Kawamura H,Hong H,et al. A review on the currents in the South China Sea:seasonal circulation, South China Sea warm current and Kuroshio intrusion[J]. Journal of Oceanography,2000,56(6):607-624. Google Scholar
[12]	Viana A,Almeida Jr W,Machado L. Different styles of canyon infill related to gravity and bottom current processes:examples from the upper slope of the SE Brazilian margin[C]//6th International Congress of the Brazilian Geophysical Society. 1999. Google Scholar
[13]	Rasmussen E S. The relationship between submarine canyon fill and sea-level change:an example from Middle Miocene offshore Gabon, West Africa[J]. Sedimentary Geology,1994,90(1):61-75. Google Scholar
[14]	Leach A,Wallace M. Cenozoic submarine canyon systems in cool water carbonates from the Otway Basin, Victoria, Australia[C]//Eastern Australasian Basins Symposium, A Refocused Energy Perspective for the Future. Petroleum Exploration Society of Australia Special Publication, 2001:465-473. Google Scholar
[15]	吴能友,杨胜雄,王宏斌,等. 南海北部陆坡神狐海域天然气水合物成藏的流体运移体系[J]. 地球物理学报,2009,52(6):1641-1650. Google Scholar [WU Nengyou, YANG Shengxiong, WANG Hongbin, et al. Gas-bearing fluid in flux sub-system for gas hydrate geological system in Shenhu area, Northern South China Sea[J]. Chinese Journal of Geophysics, 2009, 52(6):1641-1650.] Google Scholar
[16]	陈芳,周洋,苏新,等. 南海神狐海域含水合物层粒度变化及与水合物饱和度的关系[J]. 海洋地质与第四纪地质,2011,31(5):95-100. Google Scholar [CHEN Fang, ZHOU Yang, SU Xin, et al. Gas hydrate saturation and its relation with grain size of the hydrate-bearing sediments in the Shenhu area of the Northern South China Sea[J]. Marine Geology and Quaternary Geology, 2011,31(5):95-100.] Google Scholar
[17]	陆敬安,杨胜雄,吴能友,等. 南海神狐海域天然气水合物地球物理测井评价[J]. 现代地质,2008,22(3):447-451. Google Scholar [LU Jingan, YANG Shengxiong, WU Nengyou, et al. Well logging evaluation of gas hydrates in Shenhu area, South China Sea[J]. Geoscience, 2008, 22(3):447-451.] Google Scholar
[18]	Wang X,Wu S,Lee M,et al. Gas hydrate saturation from acoustic impedance and resistivity logs in the Shenhu area, South China Sea[J]. Marine and Petroleum Geology,2011,28(9):1625-1633. Google Scholar
[19]	Yang S X,Zhang H Q,Wu N Y. High concentration hydrate in disseminated forms obtained in Shenhu area, North Slope of South China Sea[C]//6th International Conference on Gas Hedrates. 2008. Google Scholar
[20]	王秀娟,吴时国,刘学伟,等. 基于测井和地震资料的神狐海域天然气水合物资源量估算[J]. 地球物理学进展,2010,25(4):1288-1297. Google Scholar [WANG Xiujuan, WU Shiguo, LIU Xuewei, et al. Estimation of gas hydrates resources based on well log data and seismic data in Shenhu area[J]. Progress in Geophysics, 2010, 25(4):1288-1297.] Google Scholar
[21]	Wang X,Hutchinson D R,Wu S,et al. Elevated gas hydrate saturation within silt and silty clay sediments in the Shenhu area, South China Sea[J]. Journal of Geophysical Research:Solid Earth (1978-2012),2011,116(B5):1-18. Google Scholar
[22]	He Y,Xie X,Kneller B C,et al. Architecture and controlling factors of canyon fills on the shelf margin in the Qiongdongnan Basin, northern South China Sea[J]. Marine and Petroleum Geology,2013,41:264-276. Google Scholar
[23]	Zhang G,Chen F,Yang S,et al. Accumulation and exploration of gas hydrate in deep-sea sediments of northern South China Sea[J]. Chinese Journal of Oceanology and Limnology,2012,30:876-888. Google Scholar
[24]	Davies R J,Thatcher K E,Mathias S A,et al. Deepwater canyons:An escape route for methane sealed by methane hydrate[J]. Earth and Planetary Science Letters,2012,323:72-78. Google Scholar
[25]
[26]	龚再升. 南海北部大陆边缘盆地分析与油气聚集[M]. 科学出版社, 1997.[GONG Zaisheng. Basin Analysis and Petroleum Zccumulation in the Contenental Margin of Northern South China Sea[M]. Science Press, 1997.] Google Scholar
[27]	孙杰,詹文欢,丘学林. 珠江口白云凹陷构造演化与油气系统的关系[J]. 海洋地质与第四纪地质,2011,31(1):101-107. Google Scholar [SUN Jie, ZHAN Wenhuan, QIU Xuelin. Relationship between tectonic evolution and petroleum systems in Baiyun Sag, Pearl River Mouth Basin[J]. Marine Geology and Quaternary Geology, 2011, 31(1):101-107.] Google Scholar
[28]	庞雄,陈长民,彭大钧,等. 南海珠江深水扇系统的层序地层学研究[J]. 地学前缘,2007,14(1):220-228. Google Scholar [PANG Xiong, CHEN Changmin, PENG Dajun, et al. Sequence stratigraphy of Pearl River Deep-water Fan System in the South China Sea[J]. Earth Science Frontiers, 2007, 14(1):220-228.] Google Scholar
[29]	Zhang Z M,Mcconnell D R,Han D H. Rock physics-based seismic trace analysis of unconsolidated sediments containing gas hydrate and free gas in Green Canyon 955, Northern Gulf of Mexico[J]. Marine and Petroleum Geology,2012,34(1):119-133. Google Scholar
[30]	吴嘉鹏,王英民,徐强. 珠江口盆地白牙凹陷海底峡谷沉积模式[J]. 海洋地质前沿,2011,27(8):26-31. Google Scholar [WU Jiapeng, WANG Yingmin, XU Qiang. A depositional model of submarine canyons in Baiyun Sag, Pearl River Mouth Basin[J]. Marine Geology Fronters, 2011, 27(8):26-31.] Google Scholar
[31]	陈端新,南海北部陆缘深水盆地流体渗漏构造研究[D].青岛,中国科学院海洋研究所,2012.[CHEN Duanxin. Focused fluid flow structure in the deep-water basins of Northern South China Sea margin[D]. Qingdao, Institute of Oceanology, Chinese Academy of Sciences, 2012.] Google Scholar