Rb and Sr geochemical characterization of the Chinese Loess stratigraphy and its implications for palaeomonsoon climate

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（1985-2004）

	Rb and Sr geochemical characterization of the Chinese Loess stratigraphy and its implications for palaeomonsoon climate
	Chen, J; Wang, YJ; Chen, Y; Liu, LW; Ji, JF; Lu, HY
	2000
发表期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
卷号	74 期号:2 页码:279-288
文章类型	Article; Proceedings Paper
摘要	Concentrations and distributions of Rb and Sr in loess and palaeosol samples from the Luochuan profile have been studied, in grain-size fractions and chemical forms. Results show that Rb is quite rich in the fraction of less than 2 mu m, and exits only in the residual phase, while Sr is distributed in sand and silt fractions, occurring in the residual and carbonate phases. Therefore, variations of the concentrations of Rb and Sr in loess and palaeosols are closely related not only to dustfall compositions depending on winter monsoon wind strength but also to summer monsoon-induced pedogenic intensity. This indicates that variations of Rb/Sr ratio in Chinese loess sequences represent cyclic alternations of East Asian summer and winter monsoon climates on the orbital time-scale. Variations in Sr concentrations along the sequence bear a high similarity to the oxygen isotope record of the deep sea sediments over the past 2.5 Ma, whereas variations in Rb concentrations are in good agreement with the record of magnetic susceptibility determined with the duplicated samples from the same profile. This suggests that (1) the high-latitude ice volume is responsible for East Asian monsoon variations and (2) the signal of magnetic susceptibility depends dominantly on pedogenesis in Chinese loess sequences.
关键词	Rb and Sr geochemical characterization Rb/Sr ratios loess sequence palaeomonsoon climate Loess Plateau
学科领域	Geology
关键词[WOS]	MAGNETIC-SUSCEPTIBILITY ; PALEOCLIMATIC IMPLICATIONS ; PALEOSOL SEQUENCES ; PLATEAU ; RECORD ; SCALE
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:000088935900026
出版者	GEOLOGICAL SOC CHINA
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12068
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Chen, J,Wang, YJ,Chen, Y,et al. Rb and Sr geochemical characterization of the Chinese Loess stratigraphy and its implications for palaeomonsoon climate[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2000,74(2):279-288.
APA	Chen, J,Wang, YJ,Chen, Y,Liu, LW,Ji, JF,&Lu, HY.(2000).Rb and Sr geochemical characterization of the Chinese Loess stratigraphy and its implications for palaeomonsoon climate.ACTA GEOLOGICA SINICA-ENGLISH EDITION,74(2),279-288.
MLA	Chen, J,et al."Rb and Sr geochemical characterization of the Chinese Loess stratigraphy and its implications for palaeomonsoon climate".ACTA GEOLOGICA SINICA-ENGLISH EDITION 74.2(2000):279-288.