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Sr-Nd isotopic constraints on detrital sediment provenance and paleoenvironmental change in the northern Okinawa Trough during the late Quaternary
Li, Tiegang1; Xu, Zhaokai1,2; Lim, Dhongil2; Chang, Fengming1; Wan, Shiming1; Jung, HoiSoo3; Choi, Jinyong4
2015-07-15
发表期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷号430页码:74-84
文章类型Article
摘要For this study, elemental and Sr-Nd isotopic compositions of AMS C-14 age-dated core sediments from the northern Okinawa Trough were investigated to reconstruct sediment provenance and transport processes over the last 22.3 ka and further to trace the forcing mechanisms behind the provenance changes. The results clearly showed that large compositional variations of these elements and isotopes occur in deposition, suggesting three-phases of changes in sediment source: paleo-Huanghe (Unit 3, 223-14.8 ka), East China Sea shelf-derived (Unit 2, 14.8-7.3 ka), and Taiwan-derived detritus stages (Unit 1, <7.3 ka). Such provenance changes since the last glacial maximum may be closely correlated to sea-level fluctuation, the evolution of Tsushima Warm Current, as well as East Asian monsoonal climatic variation. At 22.3-14.8 ka, the paleo-Huanghe mouth was situated close to the study area, thus dominating sedimentation therein, especially during stronger winter monsoon periods. At the beginning of Unit 2 (14.8-12.8 ka), rapid sea-level rise and significant retreat of the river mouth overwhelmed enhanced continental weathering, leading to less detrital sediment supply from the paleo-Huanghe to the study area. Subsequently, the East China Sea shelf-derived matter dominated detrital deposition therein from 12.8 to 73 ka. Since 73 ka, the fully evolved Tsushima Warm Current has transported some detrital particles from Taiwan to the study area, especially during the strengthening period at 7.3-5.1 ka. A prominent decline in Taiwan-sourced matter supply at 5.1-2.8 ka may have been caused by suppression of the Tsushima Warm Current, possibly associated with the Pulleniatina minimum event. (C) 2015 Elsevier B.V. All rights reserved.
关键词East Asian Monsoon Northern Okinawa Trough Sediment Provenance Sr-nd Isotope Sea Level Tsushima Warm Current
DOI10.1016/j.palaeo.2015.04.017
收录类别SCI
语种英语
WOS记录号WOS:000356739800006
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/33088
专题海洋地质与环境重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
2.Korea Inst Ocean Sci & Technol, South Sea Res Inst, Geoje 656830, South Korea
3.Korea Inst Ocean Sci & Technol, Marine Environm & Conservat Res Div, Geoje 656830, South Korea
4.Kunsan Natl Univ, Dept Oceanog, Kunsan 573701, South Korea
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Li, Tiegang,Xu, Zhaokai,Lim, Dhongil,et al. Sr-Nd isotopic constraints on detrital sediment provenance and paleoenvironmental change in the northern Okinawa Trough during the late Quaternary[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2015,430:74-84.
APA Li, Tiegang.,Xu, Zhaokai.,Lim, Dhongil.,Chang, Fengming.,Wan, Shiming.,...&Choi, Jinyong.(2015).Sr-Nd isotopic constraints on detrital sediment provenance and paleoenvironmental change in the northern Okinawa Trough during the late Quaternary.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,430,74-84.
MLA Li, Tiegang,et al."Sr-Nd isotopic constraints on detrital sediment provenance and paleoenvironmental change in the northern Okinawa Trough during the late Quaternary".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 430(2015):74-84.
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