Clay-sized sediment provenance change in the northern Okinawa Trough since 22 kyr BP and its paleoenvironmental implication SCIE SCOPUS

Cited 35 time in WEB OF SCIENCE Cited 36 time in Scopus
Title
Clay-sized sediment provenance change in the northern Okinawa Trough since 22 kyr BP and its paleoenvironmental implication
Author(s)
Xu, Zhaokai; Li, Tiegang; Chang, Fengming; Wan, Shiming; Choi, Jinyong; Lim, Dhongil
KIOST Author(s)
Lim, Dhongil(임동일)
Publication Year
2014-04-01
Abstract
Provenances of clay-sized terrigenous sediments and a comprehensive interpretation of their high-resolution variations in the northern Okinawa Trough since the late last glaciation remain unclear, especially in regard to the Huanghe- and Taiwan-derived matter. Grain size, clay mineralogy, typical elemental ratio, oxygen isotope, and AMS C-14 dating of core PC-1 in the northern Okinawa Trough were investigated to trace clay-sized sediment provenance and transport process and thus to recover their forcing mechanisms over the last 22 kyr. Variations in linear sedimentation rate, grain size, delta O-18, Ti/Ca ratio, and clay minerals can be clearly divided into three distinct intervals, consistent with changes in sediment provenance that can be close related to sea-level fluctuation, evolution of the Tsushima Warm Current as well as influence from the East Asian monsoon climate evolution. During the late last glaciation period (Interval 1, 22-16 kyr BP) when the Tsushima Warm Current was absent in the East China Sea, the paleo-Huanghe mouth was situated close to the study area and thus the paleo-Huanghe could have played major role in sedimentation therein. In Interval 2 (16-7.3 kyr BP), global sea-level rise led to gradually retreating of the paleo-Huanghe mouth and thus decreasing terrigenous sediment supply from it to the study area. Since 73 kyr BP (Interval 3), some clay minerals from Taiwan might have been transported northward to the study area by the fully evolved Tsushima Warm Current, characterized by higher chlorite/kaolinite ratios. In contrast, the decreasing influence of the Huanghe-derived sediments during the strengthening of the Tsushima Warm Current periods was probably caused by the blocking effect of the Tsushima Warm Current Particularly, chlorite/kaolinite ratio and smectite content in the Okinawa Trough sediment might be good proxies for indicating the Tsushima Warm Current-related sedimentary environment. (C) 2014 Elsevier B.V. All rights reserved.
ISSN
0031-0182
URI
https://sciwatch.kiost.ac.kr/handle/2019.kiost/2837
DOI
10.1016/j.palaeo.2014.01.016
Bibliographic Citation
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, v.399, pp.236 - 245, 2014
Publisher
ELSEVIER
Subject
EAST-ASIAN MONSOON; CROSS-SHELF CIRCULATION; CHINA SEA; KUROSHIO CURRENT; POSTGLACIAL TRANSGRESSION; LAST DEGLACIATION; RIVER SEDIMENT; KA BP; YELLOW; VARIABILITY
Keywords
Sediment provenance; Clay minerals; Sea level; Tsushima Warm Current; East Asian monsoon; Northern Okinawa Trough
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER
Related Researcher
Research Interests

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

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