Magnetic susceptibility changes in relation to pedogenesis in a Xeralf chronosequence in northwestern Spain
文献类型：期刊论文
| 作者 | Torrent, J.1; Liu, Q. S.2; Barron, V.1 |
| 刊名 | EUROPEAN JOURNAL OF SOIL SCIENCE
 |
| 出版日期 | 2010-04-01 |
| 卷号 | 61期号:2页码:161-173 |
| ISSN号 | 1351-0754 |
| DOI | 10.1111/j.1365-2389.2009.01216.x |
| 文献子类 | Article |
| 英文摘要 | Pedogenesis under aerobic conditions is usually associated with an increase in magnetic susceptibility (chi, mass-specific), which results from the formation of nano-sized magnetite and/or maghaemite. In this study, we systematically investigated the chi trend in Xeralfs from a chronosequence of 13 river terraces in an area with a Mediterranean climate in Spain. The soils in the younger terraces are well drained and reddened, but those of the older terraces exhibit redoximorphic features and reduced chi values, because of the presence of a perched water table. In the well-drained members of the chronosequence, the frequency dependent magnetic susceptibility, chi(FD), which is a proxy for the concentration of nano-sized pedogenic ferrimagnets such as maghaemite, was highly correlated with the concentration of haematite (Hm), but not with that of goethite (Gt). Also, the peak chi(FD) increased with increasing age in the younger freely drained soils, indicating that no steady state had been reached, and decreased with increasing depth. The formation of maghaemite can be explained by either or both of two formation models, namely: (i) ferrihydrite -> maghaemite -> haematite solid state transformations; and (ii) the reaction of bacterially produced Fe(II) with an Fe hydroxide phase to form magnetite, which is later oxidized to maghaemite. Comparison between these soils and those in other climatic regions indicates that the Hm/chi(FD) ratio increases with increasing soil temperature and with the degree of weathering. In the horizons exhibiting redoximorphic features on the higher terraces, there was significantly less Hm and chi(FD) in clay than in the well-drained younger soils, possibly because of reductive dissolution of haematite and maghaemite. Laboratory experiments showed that susceptibility to reductive dissolution increased in the sequence goethite < maghaemite < haematite, which is consistent with the relative abundance of these minerals in the redoximorphic horizons. |
| WOS关键词 | LOESS-PALEOSOL SEQUENCES ; IRON-OXIDE MINERALOGY ; CHINESE LOESS ; FERRIMAGNETIC MINERALS ; SOILS ; ENHANCEMENT ; DEPENDENCE ; MAGHEMITE ; FERRIHYDRITE ; PARAMETERS |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000275635100002 |
| 出版者 | WILEY-BLACKWELL PUBLISHING, INC |
| 资助机构 | Spain's Ministerio de Educacion y Ciencia(AGL2006-10927) ; Spain's Ministerio de Educacion y Ciencia(AGL2006-10927) ; FEDER ; FEDER ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; NSFC(40974036) ; NSFC(40974036) ; Spain's Ministerio de Educacion y Ciencia(AGL2006-10927) ; Spain's Ministerio de Educacion y Ciencia(AGL2006-10927) ; FEDER ; FEDER ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; NSFC(40974036) ; NSFC(40974036) ; Spain's Ministerio de Educacion y Ciencia(AGL2006-10927) ; Spain's Ministerio de Educacion y Ciencia(AGL2006-10927) ; FEDER ; FEDER ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; NSFC(40974036) ; NSFC(40974036) ; Spain's Ministerio de Educacion y Ciencia(AGL2006-10927) ; Spain's Ministerio de Educacion y Ciencia(AGL2006-10927) ; FEDER ; FEDER ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; NSFC(40974036) ; NSFC(40974036) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/73472]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Torrent, J. |
| 作者单位 | 1.Univ Cordoba, Dept Ciencias & Recursos Agr & Forestales, E-14071 Cordoba, Spain 2.Chinese Acad Sci, Inst Geol & Geophys, Paleomagnetism & Geochronol Lab SKL LE, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Torrent, J.,Liu, Q. S.,Barron, V.. Magnetic susceptibility changes in relation to pedogenesis in a Xeralf chronosequence in northwestern Spain[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2010,61(2):161-173. |
| APA | Torrent, J.,Liu, Q. S.,&Barron, V..(2010).Magnetic susceptibility changes in relation to pedogenesis in a Xeralf chronosequence in northwestern Spain.EUROPEAN JOURNAL OF SOIL SCIENCE,61(2),161-173. |
| MLA | Torrent, J.,et al."Magnetic susceptibility changes in relation to pedogenesis in a Xeralf chronosequence in northwestern Spain".EUROPEAN JOURNAL OF SOIL SCIENCE 61.2(2010):161-173. |
入库方式： OAI收割
来源：地质与地球物理研究所
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