气候变化领域集成服务门户(CCPortal): Enhancement mechanisms of magnetic susceptibility in the Chinese red-clay sequence

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DOI	10.1029/2007GL031430
	Enhancement mechanisms of magnetic susceptibility in the Chinese red-clay sequence
	Nie, Junsheng; King, John W.; Fang, Xiaomin
发表日期	2007
ISSN	0094-8276
EISSN	1944-8007
卷号	34 期号:19
英文摘要	[1] Little is known about the mechanisms of magnetic susceptibility ( c) enhancement for the red-clay sequence on the Chinese Loess Plateau (CLP), in comparison to the overlying loess-paleosol sequence. Here we present a rock magnetic study of the red-clay sediments from the central CLP. Our results show that frequency dependence of chi (chi(fd) = chi(lf) - chi(hf), where chi(lf) and chi(hf) are c measured at 470 Hz and 4700 Hz, respectively), chi(lf), and susceptibility of anhystereticremanent-magnetization (chi(ARM)) are linearly correlated within the red-clay sequence. This linear correlation indicates that the pedogenic magnetic minerals of the red-clay have a rather uniform grain size distribution as in the loess-paleosol sequence, and the grain size is independent of the degree of pedogenesis. Nevertheless, red-clay sediments are slightly more enriched in superparamagnetic magnetic particles than the overlying loess-paleosol sediments as indicated by the higher slope of the regression line between cfd and clf..
关键词	TEMPERATURE-DEPENDENT SUSCEPTIBILITY LOESS-PALEOSOL SEQUENCES PALEOCLIMATIC SIGNIFICANCE HOLOCENE LOESS GRAIN-SIZE PLATEAU PEDOGENESIS LOESS/PALEOSOL DEPOSITS GRANULOMETRY
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000250217600003
来源期刊	GEOPHYSICAL RESEARCH LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257493
推荐引用方式 GB/T 7714	Nie, Junsheng,King, John W.,Fang, Xiaomin. Enhancement mechanisms of magnetic susceptibility in the Chinese red-clay sequence[J]. 中国科学院青藏高原研究所,2007,34(19).
APA	Nie, Junsheng,King, John W.,&Fang, Xiaomin.(2007).Enhancement mechanisms of magnetic susceptibility in the Chinese red-clay sequence.GEOPHYSICAL RESEARCH LETTERS,34(19).
MLA	Nie, Junsheng,et al."Enhancement mechanisms of magnetic susceptibility in the Chinese red-clay sequence".GEOPHYSICAL RESEARCH LETTERS 34.19(2007).