Provenance weathering and erosion records in southern Okinawa Trough sediments since 28 ka: Geochemical and Sr-Nd-Pb isotopic evidences

doi:10.1016/j.chemgeo.2016.01.029

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

	Provenance weathering and erosion records in southern Okinawa Trough sediments since 28 ka: Geochemical and Sr-Nd-Pb isotopic evidences
	Dou, Yanguang 1,4; Yang, Shouye 2,4; Shi, Xuefa 3,4; Clift, Peter D.5; Liu, Shengfa 3,4; Liu, Jihua 3,4; Li, Chao 2; Bi, Lei 2; Zhao, Yun 2
刊名	CHEMICAL GEOLOGY
	2016-05
卷号	425 页码:93-109
关键词	Sediment provenance Weathering Sr-Nd-Pb isotopes Holocene Climate forcing
ISSN号	0009-2541
DOI	10.1016/j.chemgeo.2016.01.029
英文摘要	Geochemical and Sr-Nd-Pb isotopic compositions of the detrital sediments from ODP Hole 1202B and Taiwan rivers were measured in this study, aiming to reveal changes in sediment provenance in the southern Okinawa Trough (SOT) since 28 ka, and to examine the weathering and sediment transport processes in response to monsoon climate variability. Large variations in Sr-Nd-Pb isotopic ratios at 11-9 ka suggest changes in detrital sediment provenance in the SOT from a dominance of the paleo-Changjiang (Yangtze River) and/or continental shelf sediment during the late deglaciation and to west Taiwan rivers since 9.5 ka. Volcanic rocks and eastern Taiwan sediments have not significantly contributed to the SOT. The large shift in sediment provenance during the early Holocene marks a major change in oceanic circulation, mainly caused by the intrusion of the Kuroshio Current into the trough. Claymineral and geochemical proxies suggest that the Taiwan-derived sediments accumulated during the early-mid "Holocene climate optimum" (ca. 9.5-4 ka) might be tightly related to the reworking of older altered sediments from terraces and floodplains, rather than having experienced more intense silicate weathering than in the late Holocene (similar to 4-0 ka). Overall, silicate weathering in Taiwan was greatly inhibited by accelerating sediment production and transfer from land to ocean caused by monsoon intensification in Holocene. Our study illustrates that the radiogenic isotopic and geochemical compositions of fine-grained detrital sediments are sensitive tools for fingerprinting sediment sources and for reconstructing changes in oceanic currents and monsoon climate in river-dominated East Asian continental margin. (C) 2016 Elsevier B.V. All rights reserved.
资助项目	National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-03]
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000371130700007
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3456]
专题	业务部门_海洋地质与地球物理研究室
作者单位	1.Qingdao Inst Marine Geol, Minist Land & Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China; 2.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China; 3.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266071, Peoples R China; 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China; 5.Louisiana State Univ, Dept Geol & Geophys, E235 Howe Russell, Baton Rouge, LA 70803 USA
推荐引用方式 GB/T 7714	Dou, Yanguang,Yang, Shouye,Shi, Xuefa,et al. Provenance weathering and erosion records in southern Okinawa Trough sediments since 28 ka: Geochemical and Sr-Nd-Pb isotopic evidences[J]. CHEMICAL GEOLOGY,2016,425:93-109.
APA	Dou, Yanguang.,Yang, Shouye.,Shi, Xuefa.,Clift, Peter D..,Liu, Shengfa.,...&Zhao, Yun.(2016).Provenance weathering and erosion records in southern Okinawa Trough sediments since 28 ka: Geochemical and Sr-Nd-Pb isotopic evidences.CHEMICAL GEOLOGY,425,93-109.
MLA	Dou, Yanguang,et al."Provenance weathering and erosion records in southern Okinawa Trough sediments since 28 ka: Geochemical and Sr-Nd-Pb isotopic evidences".CHEMICAL GEOLOGY 425(2016):93-109.