Links between bulk sediment particle size and magnetic grain-size: general observations and implications for Chinese loess studies

doi:10.1111/j.1365-3091.2009.01071.x

	Links between bulk sediment particle size and magnetic grain-size: general observations and implications for Chinese loess studies
	Oldfield, Frank 1; Hao, Qingzhen 1,2; Bloemendal, Jan 1; Gibbs-Eggar, Zoe 1,3; Patil, Shiva 1,4; Guo, Zhengtang 2
刊名	SEDIMENTOLOGY
	2009-12-01
卷号	56 期号:7 页码:2091-2106
关键词	Environmental magnetism granulometry loess magnetic grain-size pedogenesis weathering
ISSN号	0037-0746
DOI	10.1111/j.1365-3091.2009.01071.x
文献子类	Article
英文摘要	Using a combination of particle size analysis, magnetic measurements, scanning electron microscopy and transmission electron microscopy imaging, this study shows that in a wide range of depositional environments, there is a strong link between particle size classes and magnetic response, especially below the upper limit of stable single domain magnetic behaviour. Ferrimagnetic grain assemblages dominated by stable single domain magnetosomes regularly have peak susceptibility and remanence values in coarser grades than do those containing finer-grained, viscous and superparamagnetic secondary magnetic minerals formed during pedogenesis. This effect is despite the fact that there is a one to two orders of magnitude size difference between the particle size boundaries (at 1 or 2 mu m) and key domain state transitions (mostly below 0 center dot 05 mu m). The implications of these results are explored using samples spanning 22 Myr of loess accumulation on the Chinese Loess Plateau. The results from the loess sections, complemented by data from low-temperature magnetic experiments, show that there are subtle distinctions in mean ferrimagnetic grain-size between the Pleistocene and Miocene parts of the record, thus allowing more refined rock magnetic interpretations of the fine-grained ferrimagnetic mineral assemblages arising from the effects of weathering, pedogenesis and possibly diagenesis in the sections studied.
WOS关键词	PLATEAU ; SAMPLES ; PEDOGENESIS ; MIOCENE ; RECORD ; SOILS ; EARTH ; LAKE ; SEA
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL PUBLISHING, INC
WOS记录号	WOS:000272132000009
资助机构	National Science Foundation of China(40730104 ; National Science Foundation of China(40730104 ; Chinese Academy of Sciences(KZCX-YW-117) ; Chinese Academy of Sciences(KZCX-YW-117) ; 40672115) ; 40672115) ; National Science Foundation of China(40730104 ; National Science Foundation of China(40730104 ; Chinese Academy of Sciences(KZCX-YW-117) ; Chinese Academy of Sciences(KZCX-YW-117) ; 40672115) ; 40672115) ; National Science Foundation of China(40730104 ; National Science Foundation of China(40730104 ; Chinese Academy of Sciences(KZCX-YW-117) ; Chinese Academy of Sciences(KZCX-YW-117) ; 40672115) ; 40672115) ; National Science Foundation of China(40730104 ; National Science Foundation of China(40730104 ; Chinese Academy of Sciences(KZCX-YW-117) ; Chinese Academy of Sciences(KZCX-YW-117) ; 40672115) ; 40672115)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71860]
专题	中国科学院地质与地球物理研究所
通讯作者	Oldfield, Frank
作者单位	1.Univ Liverpool, Dept Geog, Liverpool L69 7ZT, Merseyside, England 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 3.Cedars, Hereford HR1 1TS, England 4.KS Krishnan Geomagnet Res Lab IIG, Allahabad 221505, Uttar Pradesh, India
推荐引用方式 GB/T 7714	Oldfield, Frank,Hao, Qingzhen,Bloemendal, Jan,et al. Links between bulk sediment particle size and magnetic grain-size: general observations and implications for Chinese loess studies[J]. SEDIMENTOLOGY,2009,56(7):2091-2106.
APA	Oldfield, Frank,Hao, Qingzhen,Bloemendal, Jan,Gibbs-Eggar, Zoe,Patil, Shiva,&Guo, Zhengtang.(2009).Links between bulk sediment particle size and magnetic grain-size: general observations and implications for Chinese loess studies.SEDIMENTOLOGY,56(7),2091-2106.
MLA	Oldfield, Frank,et al."Links between bulk sediment particle size and magnetic grain-size: general observations and implications for Chinese loess studies".SEDIMENTOLOGY 56.7(2009):2091-2106.