Sr-Nd isotopic constraints on terrigenous sediment provenances and Kuroshio Current variability in the Okinawa Trough during the late Quaternary

doi:10.1016/j.palaeo.2012.09.003

	Sr-Nd isotopic constraints on terrigenous sediment provenances and Kuroshio Current variability in the Okinawa Trough during the late Quaternary
	Dou, Yanguang 2; Yang, Shouye 1; Liu, Zhenxia 3; Shi, Xuefa 3; Li, Jun 2; Yu, Hua 3; Berne, Serge 4
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2012-12
卷号	365 页码:38-47
关键词	Okinawa Trough Sediment provenance Sr-Nd isotope Kuroshio Current Late Quaternary East China Sea
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2012.09.003
英文摘要	The Okinawa Trough in the East China Sea continuously receives terrigenous sediments from the surrounding East Asian continent during the late Quaternary, which makes it an ideal site for the studies of land-sea interaction and sediment source-to-sink transport. Geochemical and Sr-Nd isotopic compositions of the detrital sediments in the middle Okinawa Trough allow the provenance discrimination and the reconstruction of paleoenvironmental changes over the last 30 ka. Large variations in Sr-87/Sr-86 ratios and epsilon(Nd) values occur between 14.0 and 7.1 ka, suggesting a significant change in sediment provenances from the dominance of the Changjiang (Yangtze River) and/or continental shelf to that of Taiwan Island. During the last glacial maximum, the continental shelf was largely exposed and the fine-grained sediments from the Changjiang and the shelf with higher Sr-87/Sr-86 ratios and lower epsilon(Nd) values might be transported directly into the middle Okinawa Trough. With the sea level rise during the deglacial period, the strengthening Kuroshio Current increasingly delivered Taiwan-derived fine sediments (lower Sr-87/Sr-86 ratios and higher epsilon(Nd) values) to the middle trough, while the sediment contribution from the East Asian continent became subordinate. This study suggests that the changes in sea level and the Kuroshio Current pathway during the late Quaternary predominantly determined the dispersal and deposition of the terrigenous sediments in the Okinawa Trough, and the Kuroshio Current might have obviously influenced the Okinawa Trough since 14 ka. This study illustrates that the radiogenic isotopic compositions of the fined-grained sediments are sensitive proxies to trace the sediment provenance and to reconstruct oceanic circulations in the west Pacific marginal seas. (c) 2012 Elsevier B.V. All rights reserved.
资助项目	opening foundation of Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, China[MRE201111]
WOS关键词	EAST CHINA SEA ; LAST GLACIAL MAXIMUM ; NORTHWESTERN PACIFIC-OCEAN ; PALEOENVIRONMENTAL CHANGE ; PLANKTONIC-FORAMINIFERA ; DETRITAL SEDIMENT ; WATER EVOLUTION ; OXYGEN-ISOTOPE ; SURFACE-WATER ; TAIWAN
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000312183500003
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25664]
专题	自然资源部第一海洋研究所
通讯作者	Yang, Shouye
作者单位	1.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 2.Qingdao Inst Marine Geol, Minist Land & Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China 3.State Ocean Adm, Inst Oceanog 1, SOA, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266071, Peoples R China 4.Univ Perpignan, F-66860 Perpignan, France
推荐引用方式 GB/T 7714	Dou, Yanguang,Yang, Shouye,Liu, Zhenxia,et al. Sr-Nd isotopic constraints on terrigenous sediment provenances and Kuroshio Current variability in the Okinawa Trough during the late Quaternary[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2012,365:38-47.
APA	Dou, Yanguang.,Yang, Shouye.,Liu, Zhenxia.,Shi, Xuefa.,Li, Jun.,...&Berne, Serge.(2012).Sr-Nd isotopic constraints on terrigenous sediment provenances and Kuroshio Current variability in the Okinawa Trough during the late Quaternary.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,365,38-47.
MLA	Dou, Yanguang,et al."Sr-Nd isotopic constraints on terrigenous sediment provenances and Kuroshio Current variability in the Okinawa Trough during the late Quaternary".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 365(2012):38-47.