Nd and Sr isotopic variations in Chinese eolian deposits during the past 8 Ma: Implications for provenance change

doi:10.1016/j.epsl.2005.09.019

	Nd and Sr isotopic variations in Chinese eolian deposits during the past 8 Ma: Implications for provenance change
	Sun, JM
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2005-12-01
卷号	240 期号:2 页码:454-466
关键词	Sm-nd Isotope Rb-sr Isotope Eolian Deposits Provenance Loess Plateau
ISSN号	0012-821X
DOI	10.1016/j.epsl.2005.09.019
英文摘要	A record of changes in Nd and Sr isotopic composition of the eolian deposits from the central Loess Plateau has been determined for the past 8 Ma. The isotopic records of the silicate fraction of the Quaternary and Tertiary eolian deposits allow interpreting the interplay between the Sr isotopic variations in the eolian deposits and the late Cenozoic tectonic and climatic changes. The results indicate that the temporal variations of Nd and Sr isotopes show remarkable changes around the beginning of the Quaternary. The lower values of the Nd-143/Nd-144 and the decreasing trend of the Sr-87/Sr-86 ratios after 2,58 Ma ago are attributed to the additions of relatively younger crust materials in response to the climatic cooling and the late Cenozoic uplift induced glacial grinding in the high orogenic belts in central Asia, In this context. the substantial changes in climate and tectonics have modified dust sources significantly, and the Quaternary loess forming processes are preferentially sampling relatively younger and high relief crust materials than that of the Tertiary Red Clay. (C) 2005 Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000234470100021
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65276]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun, JM
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Sun, JM. Nd and Sr isotopic variations in Chinese eolian deposits during the past 8 Ma: Implications for provenance change[J]. EARTH AND PLANETARY SCIENCE LETTERS,2005,240(2):454-466.
APA	Sun, JM.(2005).Nd and Sr isotopic variations in Chinese eolian deposits during the past 8 Ma: Implications for provenance change.EARTH AND PLANETARY SCIENCE LETTERS,240(2),454-466.
MLA	Sun, JM."Nd and Sr isotopic variations in Chinese eolian deposits during the past 8 Ma: Implications for provenance change".EARTH AND PLANETARY SCIENCE LETTERS 240.2(2005):454-466.