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A new model for transformation of ferrihydrite to hematite in soils and sediments
Jiang, Zhaoxia1,2,3; Liu, Qingsong3,4; Roberts, Andrew P.5; Barron, Vidal6; Torrents, Jose6; Zhang, Qiang7
2018-11-01
发表期刊GEOLOGY
ISSN0091-7613
卷号46期号:11页码:987-990
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.
DOI10.1130/G45386.1
资助者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
关键词[WOS]MAGNETIC ENHANCEMENT ; 2-LINE FERRIHYDRITE ; IRON OXYHYDROXIDE ; CHINESE LOESS ; SUSCEPTIBILITY ; PALEOPRECIPITATION ; AGGREGATION ; MAGHEMITE ; OXIDES ; FE2O3
语种英语
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]
资助者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
WOS研究方向Geology
WOS类目Geology
WOS记录号WOS:000449047800015
出版者GEOLOGICAL SOC AMER, INC
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/89159
专题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
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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.
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