气候变化领域集成服务门户(CCPortal): Environmental magnetic study of a Xeralf chronosequence in northwestern Spain: Indications for pedogenesis

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DOI	10.1016/j.palaeo.2010.05.008
	Environmental magnetic study of a Xeralf chronosequence in northwestern Spain: Indications for pedogenesis
	Liu, Qingsong; Hu, Pengxiang; Torrent, Jose; Barron, Vidal; Zhao, Xiangyu; Jiang, Zhaoxia; Su, Youliang
通讯作者	Liu, QS (通讯作者)
发表日期	2010
ISSN	0031-0182
EISSN	1872-616X
起始页码	144
结束页码	156
卷号	293 期号:1-2
英文摘要	Magnetic enhancement of A and B horizons during soil development is a common phenomenon. To better understand the exact mechanism for the magnetic enhancement, especially the mineral transformation pathways, systematic rock magnetic studies were conducted on a Xeralf chronosequence in northwestern Spain. A positive correlation was found between the average grain size and the concentration of pedogenic maghemite particles with the exception of some A horizons, in which multiple factors seem to influence the nature and concentration of neoformed ferrimagnets. It is argued that the interaction between the positively charged iron oxides and the anionic ligands present in the solution of these acidic soils plays an important role in this respect. The time trends of the average grain size of pedogenic ferrimagnets and the strong correlation between the concentrations of hematite and maghemite in the magnetically enhanced horizons (A and B) are consistent with the hypothesis of a gradual formation of maghemite (later converted into hematite) via a precursor (most likely ferrihydrite). Therefore, this study provides strong evidence for the dynamic evolution of magnetic minerals upon pedogenesis. (C) 2010 Elsevier B.V. All rights reserved.
关键词	LOESS-PALEOSOL SEQUENCE CHINESE LOESS FREQUENCY-DEPENDENCE SUSCEPTIBILITY MEASUREMENTS SOIL CHRONOSEQUENCES AC SUSCEPTIBILITY ENHANCEMENT PALEOCLIMATE FERRIHYDRITE MAGHEMITE
英文关键词	Soil magnetism; Chronosequence; Pedogenesis
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000280007000012
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
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/257768
推荐引用方式 GB/T 7714	Liu, Qingsong,Hu, Pengxiang,Torrent, Jose,et al. Environmental magnetic study of a Xeralf chronosequence in northwestern Spain: Indications for pedogenesis[J]. 中国科学院青藏高原研究所,2010,293(1-2).
APA	Liu, Qingsong.,Hu, Pengxiang.,Torrent, Jose.,Barron, Vidal.,Zhao, Xiangyu.,...&Su, Youliang.(2010).Environmental magnetic study of a Xeralf chronosequence in northwestern Spain: Indications for pedogenesis.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,293(1-2).
MLA	Liu, Qingsong,et al."Environmental magnetic study of a Xeralf chronosequence in northwestern Spain: Indications for pedogenesis".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 293.1-2(2010).