Late Quaternary sedimentary environmental evolution offshore of the Hangzhou Bay, East China-implications for sea level change and formation of Changjiang alongshore current

doi:10.1007/s00343-015-4172-0

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋地质与地球物理研究室

	Late Quaternary sedimentary environmental evolution offshore of the Hangzhou Bay, East China-implications for sea level change and formation of Changjiang alongshore current
	Wang Xin 1,2; Shi Xuefa 3; Wang Guoqing 4; Qiao Shuqing 3; Wang Kunshan 3; Yao Zhengquan 3; Wang Xuchen 5
刊名	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2015-05
卷号	33 期号:3 页码:748-763
关键词	continental shelf off Hangzhou Bay East China Sea mud wedge Changjiang alongshore current sediments transportation and deposition postglacial sea level
ISSN号	0254-4059
DOI	10.1007/s00343-015-4172-0
英文摘要	This study focuses on sedimentary environmental changes offshore of Hangzhou Bay, East China, since the Late Quaternary. AMS C-14 ages from core CJK10, lithologies, distribution of foraminifera, heavy minerals, and S and Cl elements show a fluvial terrace environment during similar to 23.2-11.0 cal ka BP; a littoral to tidal-flat environment during 11.0-10.2 cal ka BP; and a shallow marine environment with a relatively low sedimentation rate (0.1-0.22 cm/a) since 4.3 cal ka BP. High depositional rates (similar to 1.6 cm/a) from 10.9 to 10.2 cal ka BP resulted from sufficient accommodation space created by rapid sea level rise from -44 m to -33 m, from high sediment delivery by local rivers, and effective trapping of sediments by tidal-flat vegetation. The rate of sea level rise was variable; relatively high from 10.9 to 10.6 cal ka BP (2.1 cm/a), and lower since 10.6 cal ka BP (1.2 cm/a). The Changjiang alongshore current crossed the Hangzhou Bay to form the mud wedge on the inner shelf of the East China Sea later than 9.4 cal ka BP. The CJK10 site was a tide-dominated shelf environment and experienced erosion from approximately 9.4-9.2 cal ka BP to 4.3 cal ka BP. The depositional hiatus was caused by the Changjiang alongshore current, which was relatively weak during 9.4-7.5 cal ka BP and increased in strength during similar to 7.5-4 cal ka BP. From similar to 4.3 cal ka BP, a large amount of sediment from the Changjiang River was partly deposited on the continental shelf of Hangzhou Bay with some transported southward. Therefore, this study clarifies the history of Changjiang-derived sediment dispersal and deposition, although a detailed record of the changes in the Changjiang alongshore current since 4.3 cal ka BP is difficult to obtain because of the scarcity of evidence.
资助项目	State Key Laboratory of Marine Geology and Environment, Institute of Oceanology Program[MGE2012KG09]
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000353891400022
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3674]
专题	业务部门_海洋地质与地球物理研究室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China; 4.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China; 5.Univ Massachusetts, Boston, MA 02125 USA
推荐引用方式 GB/T 7714	Wang Xin,Shi Xuefa,Wang Guoqing,et al. Late Quaternary sedimentary environmental evolution offshore of the Hangzhou Bay, East China-implications for sea level change and formation of Changjiang alongshore current[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2015,33(3):748-763.
APA	Wang Xin.,Shi Xuefa.,Wang Guoqing.,Qiao Shuqing.,Wang Kunshan.,...&Wang Xuchen.(2015).Late Quaternary sedimentary environmental evolution offshore of the Hangzhou Bay, East China-implications for sea level change and formation of Changjiang alongshore current.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,33(3),748-763.
MLA	Wang Xin,et al."Late Quaternary sedimentary environmental evolution offshore of the Hangzhou Bay, East China-implications for sea level change and formation of Changjiang alongshore current".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 33.3(2015):748-763.