Multiple origins and interpretations of the magnetic susceptibility signal in Chinese wind-blown sediments

	Multiple origins and interpretations of the magnetic susceptibility signal in Chinese wind-blown sediments
	Sun, JM; Liu, TS
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2000-08-15
卷号	180 期号:3-4 页码:287-296
关键词	magnetic susceptibility Loess Plateau Loess genesis
ISSN号	0012-821X
文献子类	Article
英文摘要	In most Chinese loess-paleosol sequences, high magnetic susceptibility values are found in the soil horizons, with low values in the loess layers. The susceptibility signal has been widely used as a proxy climatic indicator. However, both the causes and mechanisms which control susceptibility still remain controversial. Our recent studies challenge some earlier interpretations of the magnetic susceptibility signal in Chinese wind-blown sediments. First, the prevailing hypothesis of pedogenic origin cannot totally account for the susceptibility variations in many sections. Second, in some cases, the principal carrier of the magnetization seems not to be the ultrafine pedogenic minerals, rather coarse lithogenic magnetic minerals derived from local sources can also contribute significantly to the susceptibility signal. Finally, not all the Chinese soils have higher susceptibility values than that of loess or sand layers, opposite relationships do exist. It is concluded that the source and causes of susceptibility may be different from site to site or even at different times at a given site. Any single hypothesis cannot completely account for the susceptibility variations in the Chinese Loess Plateau and its surrounding regions. Besides the previous explanations of carbonate leaching, pedogenic processes and organic decomposition, the contribution of source materials to magnetic susceptibility must also be taken into account. (C) 2000 Elsevier Science B.V. All rights reserved.
WOS关键词	MU US DESERT ; LOESS PLATEAU ; GRAINED MAGNETITE ; LATE QUATERNARY ; RECORD ; DEPOSITS ; STRATIGRAPHY ; PALEOSOLS ; SOILS ; PALEOCLIMATE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000088736000005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/76145]
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,Liu, TS. Multiple origins and interpretations of the magnetic susceptibility signal in Chinese wind-blown sediments[J]. EARTH AND PLANETARY SCIENCE LETTERS,2000,180(3-4):287-296.
APA	Sun, JM,&Liu, TS.(2000).Multiple origins and interpretations of the magnetic susceptibility signal in Chinese wind-blown sediments.EARTH AND PLANETARY SCIENCE LETTERS,180(3-4),287-296.
MLA	Sun, JM,et al."Multiple origins and interpretations of the magnetic susceptibility signal in Chinese wind-blown sediments".EARTH AND PLANETARY SCIENCE LETTERS 180.3-4(2000):287-296.