Sr-Nd isotopic constraints on detrital sediment provenance and paleoenvironmental change in the northern Okinawa Trough during the late Quaternary SCIE SCOPUS

Cited 31 time in WEB OF SCIENCE Cited 34 time in Scopus
Title
Sr-Nd isotopic constraints on detrital sediment provenance and paleoenvironmental change in the northern Okinawa Trough during the late Quaternary
Author(s)
Li, Tiegang; Xu, Zhaokai; Lim, Dhongil; Chang, Fengming; Wan, Shiming; Jung, HoiSoo; Choi, Jinyong
KIOST Author(s)
Lim, Dhongil(임동일)Jung, Hoi Soo(정회수)
Publication Year
2015-07-15
Abstract
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.
ISSN
0031-0182
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2446
DOI
10.1016/j.palaeo.2015.04.017
Bibliographic Citation
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, v.430, pp.74 - 84, 2015
Publisher
ELSEVIER
Subject
EAST CHINA SEA; CROSS-SHELF CIRCULATION; YELLOW-RIVER DELTA; KUROSHIO CURRENT; ASIAN MONSOON; SPATIAL DISTRIBUTIONS; MILLENNIAL-SCALE; YANGTZE DELTA; LEVEL CHANGE; JAPAN SEA
Keywords
East Asian monsoon; Northern Okinawa Trough; Sediment provenance; Sr-Nd isotope; Sea level; Tsushima Warm Current
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER
Related Researcher
Research Interests

Marine Geochemistry,Paleoceanography,Marine Pollution,해양지화학,고해양학,해양오염학

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse