Provenance changes in fine detrital quartz in the inner shelf sediments of the East China Sea associated with shifts in the East Asian summer monsoon front during the last 6 kyrs

Wang, Ke; Tada, Ryuji; Zheng, Hongbo; Irino, Tomohisa; Zhou, Bin; Saito, Keita

Provenance changes in fine detrital quartz in the inner shelf sediments of the East China Sea associated with shifts in the East Asian summer monsoon front during the last 6 kyrs

Wang, Ke; Tada, Ryuji; Zheng, Hongbo et al.

Progress in earth and planetary science, 2020, 7(1), 5

Permalink : https://hdl.handle.net/2115/76935

このアイテムのアクセス数:683件（2026-08-18 03:03 集計）

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https://doi.org/10.1186/s40645-019-0319-5			10

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アクセス権	open access
URI	https://hdl.handle.net/2115/76935
タイトル	Provenance changes in fine detrital quartz in the inner shelf sediments of the East China Sea associated with shifts in the East Asian summer monsoon front during the last 6 kyrs
著者	Wang, Ke ; Tada, Ryuji ; Zheng, Hongbo ; Irino, Tomohisa ; Zhou, Bin ; Saito, Keita
著者名 Wang, Ke
著者名 Tada, Ryuji
著者名 Zheng, Hongbo
e-Rad_Researcher 70332476 著者名 Irino, Tomohisa
著者名 Zhou, Bin
著者名 Saito, Keita
言語	英語
キーワード	Electron spin resonance
	Crystallinity index
	East Asian summer monsoon
	The Yangtze River drainage
	The East China Sea
発行日	2020-02-02
出版者	Springer (SpringerOpen)
収録物名	Progress in earth and planetary science
巻(号)	7(1)
ページ	5
抄録	The inner shelf sediments of the East China Sea (ECS) preserve valuable information regarding climatic changes on land through detrital material discharged from large rivers, particularly the Yangtze River. In this paper, we examine the provenance changes of fine-grained detrital quartz preserved in the sediment of the MD06-3040 core retrieved from the mud belt on the inner shelf of the ECS during the last 6 kyrs. The provenance of the fine silt fraction (4-16 mu m) of the sediments, which is considered to represent the suspended particulate matter (SPM) from the Yangtze River, is estimated based on the electron spin resonance (ESR) signal intensity and crystallinity index (CI) of quartz. By comparing the ESR signal intensity and CI of quartz in the fine silt fraction of sediments to those from different parts of tributaries in the modern Yangtze River drainage, we can discriminate the SPM sourced from the northwestern and southeastern tributaries of the Yangtze River. Shifts in the East Asian summer monsoon (EASM) front are monitored by changes in the main precipitation areas which are manifested as changes in source rock ages and types implied from the ESR signal intensity and CI of quartz in the fine silt fraction of the studied sediments discharged from the Yangtze River. Temporal changes in provenance of the fine silt fraction through time suggest that shifts in the main location of EASM precipitation (most likely representing the EASM front) occurred at a multi-centennial-to-millennial scale with the deepest northwestward penetration of the EASM precipitation front (an enhanced EASM) occurring during the period 3.5-2.0 kyr BP and a southeastward retreat (a weak EASM) occurring during the periods 6.0-4.1 and 2.0-0 kyr BP.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
PISSN	2197-4284
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1186/s40645-019-0319-5