Paleoclimatic indication of X-ray fluorescence core-scanned Rb/Sr ratios: A case study in the Zoige Basin in the eastern Tibetan Plateau

doi:10.1007/s11430-020-9667-7

	Paleoclimatic indication of X-ray fluorescence core-scanned Rb/Sr ratios: A case study in the Zoige Basin in the eastern Tibetan Plateau
	Yang, Hanfei 1,2; Zhao, Yan 1,2; Cui, Qiaoyu 2; Ren, Weihe 1,2; Li, Quan 2
刊名	SCIENCE CHINA-EARTH SCIENCES
	2020-10-16
页码	17
关键词	Rb Sr ratios XRF core scanning Lake sediment Tibetan Plateau Paleoclimatic indication
ISSN号	1674-7313
DOI	10.1007/s11430-020-9667-7
通讯作者	Cui, Qiaoyu(qiaoyu.cui@igsnrr.ac.cn)
英文摘要	The X-ray fluorescence (XRF) core-scanned Rb/Sr ratios of lake sediments have been widely used as a proxy for chemical weathering intensity and past climate change. However, some factors could affect Rb/Sr ratios, causing misinterpretation and limiting its application. In this study, we present a high-resolution XRF core-scanned Rb/Sr record of core ZB13-C1 from the Zoige Basin in the eastern Tibetan Plateau. To validate its application, we correlated this record with the chemical index of alteration (CIA) and other paleoclimatic proxies. Our results showed that (1) the core-scanned Rb/Sr ratios and CIA were reliable proxies of chemical weathering intensity in fine-grained sedimentary sequences; (2) the low values of core-scanned Rb/Sr ratios and CIA were significantly correlated with high total organic carbon content, arboreal pollen content, carbonate content, and C/N ratios, confirming its reliability as a proxy for the Asian summer monsoon intensity; (3) the core-scanned Rb/Sr ratios at core depths of 25-0.3 and 56-17 m were unable to reliably reflect chemical weathering intensity due to both the grain-size effect and the low test accuracy. Our study highlights the need for mutual verification of multiple indicators before accurately applying Rb/Sr as a paleoclimatic proxy in other similar study areas.
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDA20070101] ; National Natural Science Foundation of China[41690113] ; National Natural Science Foundation of China[41888101] ; National Key Research and Development Program of China[2016YFA0600501]
WOS关键词	CHEMICAL-WEATHERING INTENSITY ; SUMMER MONSOON ; LAKE-SEDIMENTS ; ENVIRONMENTAL-CHANGES ; CLIMATIC CHANGES ; LOESS DEPOSITS ; CENTRAL CHINA ; QAIDAM BASIN ; PROXY RECORD ; HOLOCENE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000579707300002
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/157143]
专题	中国科学院地理科学与资源研究所
通讯作者	Cui, Qiaoyu
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Yang, Hanfei,Zhao, Yan,Cui, Qiaoyu,et al. Paleoclimatic indication of X-ray fluorescence core-scanned Rb/Sr ratios: A case study in the Zoige Basin in the eastern Tibetan Plateau[J]. SCIENCE CHINA-EARTH SCIENCES,2020:17.
APA	Yang, Hanfei,Zhao, Yan,Cui, Qiaoyu,Ren, Weihe,&Li, Quan.(2020).Paleoclimatic indication of X-ray fluorescence core-scanned Rb/Sr ratios: A case study in the Zoige Basin in the eastern Tibetan Plateau.SCIENCE CHINA-EARTH SCIENCES,17.
MLA	Yang, Hanfei,et al."Paleoclimatic indication of X-ray fluorescence core-scanned Rb/Sr ratios: A case study in the Zoige Basin in the eastern Tibetan Plateau".SCIENCE CHINA-EARTH SCIENCES (2020):17.