Channel-related sediment waves on the eastern slope offshore Dongsha Islands, northern South China Sea

doi:10.1016/j.jseaes.2012.09.025

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质调查局广州海洋地质调查局

	Channel-related sediment waves on the eastern slope offshore Dongsha Islands, northern South China Sea
	Kuang, Zenggui 3; Zhong, Guangfa 1; Wang, Liaoliang ; Guo, Yiqun
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2014
卷号	79 页码:540-551
关键词	Sediment waves Submarine channels Continental slope Turbidity current South China Sea
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2012.09.025
英文摘要	The characteristics and origin of the sediment waves on the eastern slope offshore Dongsha Islands, northern South China Sea (SCS) were analyzed by integrating high-resolution multibeam bathymetric, seismic and piston core data. Four sediment wave fields were identified, which are the West Dongsha Channel (WDSW), West Taiwan Channel (WTSW), South Taiwan Channel (STSW) and West Penghu Channel (WPSW) sediment wave fields, respectively. They are distributed on the right levees (looking downstream) and adjacent overbank areas of related channels (WDSW, WTSW, and STSW), or developed outside the channel mouths (WPSW). Each sediment wave field consists of several to tens of rows of sediment waves. These sediment waves are up to 2.8-7.2 km in wavelength and 30-60 m in wave height. With wave crests orthogonal to or oblique to the orientation of the channels, the sediment waves gradually decrease in dimension both in downslope direction and with the distance increasing away from the ' channel. Most sediment waves are asymmetric in cross sections with a thicker upslope flank and a thinner downslope flank, and therefore migrate upslope. Piston cores suggest that sandy turbidites developed with normal size grading dominate the channels, while massive muds with thin sandy or silty turbidite interbeds prevail in the inter-channel regions on which the sediment waves situated. The sediment waves on the channel levees and related overbank areas (WDSW, WTSW, and STWD) were presumably built by the turbidity currents overspilled from the channels; while those in WPSW, located outside the mouth of the West Penghu Channel, are suggested generated by unconfined sheet-like turbidity currents outside the channel mouth. (C) 2012 Elsevier Ltd. All rights reserved.
学科主题	海洋地质学
WOS关键词	TURBIDITY CURRENTS ; NEW-ZEALAND ; DEEP-WATER ; SURFACE CIRCULATION ; ARGENTINE BASIN ; JAPAN SEA ; MODEL ; DEPOSITION ; TRANSPORT ; MUDWAVES
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000330604900045
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40336]
专题	中国地质调查局广州海洋地质调查局
作者单位	1.Guangzhou Marine Geol Survey, Guangzhou 510075, Guangdong, Peoples R China 2.Tone Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 3.中国地质调查局广州海洋地质调查局
推荐引用方式 GB/T 7714	Kuang, Zenggui,Zhong, Guangfa,Wang, Liaoliang,et al. Channel-related sediment waves on the eastern slope offshore Dongsha Islands, northern South China Sea[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,79:540-551.
APA	Kuang, Zenggui,Zhong, Guangfa,Wang, Liaoliang,&Guo, Yiqun.(2014).Channel-related sediment waves on the eastern slope offshore Dongsha Islands, northern South China Sea.JOURNAL OF ASIAN EARTH SCIENCES,79,540-551.
MLA	Kuang, Zenggui,et al."Channel-related sediment waves on the eastern slope offshore Dongsha Islands, northern South China Sea".JOURNAL OF ASIAN EARTH SCIENCES 79(2014):540-551.