A new model for transformation of ferrihydrite to hematite in soils and sediments

doi:10.1130/G45386.1

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	A new model for transformation of ferrihydrite to hematite in soils and sediments
	Jiang, Zhaoxia 1,2,3; Liu, Qingsong 3,4; Roberts, Andrew P.5; Barron, Vidal 6; Torrents, Jose 6; Zhang, Qiang 7
刊名	GEOLOGY
	2018-11-01
卷号	46 期号:11 页码:987-990
ISSN号	0091-7613
DOI	10.1130/G45386.1
英文摘要	Ferrihydrite is among the most common precursors for iron-oxide formation in soils and sediments. Previous studies proposed a three-stage process for ferrihydrite transformation to hematite via an intermediate ferrimagnetic phase, which provides the basis for interpreting iron-oxide formation and its paleoenvironmental significance. From our new results, we identified two extra stages in this transformation, which fundamentally change the conventional model. The revised five-stage model is: (I) magnetically ordered (or core-shell structured) superparamagnetic (SP) ferrihydrite formation, (II) rapid hematite formation from SP ferrihydrite, (III) relative hematite stabilization, (IV) maghemite nanoparticle neoformation, and (V) completion of the transformation from maghemite to hematite. Unlike the previous model, in which pedogenic maghemite and hematite were formed mainly in stages I and II, we conclude that they are formed dominantly in stages IV and V, respectively. Thus, our work provides a new framework for interpreting pedogenic iron oxides and their paleoclimatic implications in natural environments.
资助项目	National Key Research and Development Program of China[2016YFA0601903] ; National Natural Science Foundation of China[41504055] ; National Natural Science Foundation of China[41430962] ; Australian Research Council[DP110105419] ; Australian Research Council[DP120103952]
WOS关键词	MAGNETIC ENHANCEMENT ; 2-LINE FERRIHYDRITE ; IRON OXYHYDROXIDE ; CHINESE LOESS ; SUSCEPTIBILITY ; PALEOPRECIPITATION ; AGGREGATION ; MAGHEMITE ; OXIDES ; FE2O3
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000449047800015
资助机构	National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/89159]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Liu, Qingsong
作者单位	1.Ocean Univ China, Minist Educ, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China 2.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China 3.Qingdao Natl Oceanog Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266237, Peoples R China 4.Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China 5.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia 6.Univ Cordoba, Dept Agron, Edificio C4,Campus Rabanales, E-14071 Cordoba, Spain 7.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Zhaoxia,Liu, Qingsong,Roberts, Andrew P.,et al. A new model for transformation of ferrihydrite to hematite in soils and sediments[J]. GEOLOGY,2018,46(11):987-990.
APA	Jiang, Zhaoxia,Liu, Qingsong,Roberts, Andrew P.,Barron, Vidal,Torrents, Jose,&Zhang, Qiang.(2018).A new model for transformation of ferrihydrite to hematite in soils and sediments.GEOLOGY,46(11),987-990.
MLA	Jiang, Zhaoxia,et al."A new model for transformation of ferrihydrite to hematite in soils and sediments".GEOLOGY 46.11(2018):987-990.