Environmental magnetic study of a Xeralf chronosequence in northwestern Spain: Indications for pedogenesis
Environmental magnetic study of a Xeralf chronosequence in northwestern Spain: Indications for pedogenesis
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西班牙西北部 Xeralf 年代序列的环境磁学研究：成土指示
DOI：
10.1016/j.palaeo.2010.05.008
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发表时间：
2010-07
期刊：
影响因子：
--
通讯作者：
Su, Youliang
中科院分区：
文献类型：
--
作者：
Liu, Qingsong;Hu, Pengxiang;Torrent, Jose;Barron, Vidal;Zhao, Xiangyu;Jiang, Zhaoxia;Su, Youliang
在土壤发育过程中，A层和B层的磁性增强是一种普遍现象。为了更好地理解磁性增强的确切机制，特别是矿物转化途径，在西班牙西北部的Xeralf年代序列上进行了系统的岩石磁性研究。成土磁赤铁矿颗粒的平均粒径和浓度之间的正相关关系，发现与某些例外的视野，其中多种因素似乎影响的性质和浓度的新生亚铁磁体。有人认为，带正电的铁氧化物和阴离子配体存在于这些酸性土壤的溶液中的相互作用在这方面起着重要的作用。成壤亚铁磁体的平均粒度的时间趋势和磁增强层（A和B）中赤铁矿和磁赤铁矿浓度之间的强相关性与磁赤铁矿（后来转化为赤铁矿）通过前体（最有可能是水铁矿）逐渐形成的假设一致。因此，本研究为磁性矿物在成土作用中的动态演化提供了有力的证据。
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.
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影响因子：
64.8
作者：
L. Zhou;F. Oldfield;A. Wintle;S. Robinson;J. T. Wang
通讯作者：
L. Zhou;F. Oldfield;A. Wintle;S. Robinson;J. T. Wang
影响因子：
2.3
作者：
A. Stephenson
通讯作者：
A. Stephenson
影响因子：
64.8
作者：
Pacific Northwest;Charles G. Johnson
通讯作者：
Pacific Northwest;Charles G. Johnson
影响因子：
2.7
作者：
V. Skumryev;H. Blythe;J. Cullen;J. Coey
通讯作者：
V. Skumryev;H. Blythe;J. Cullen;J. Coey
影响因子：
3.1
作者：
Barrón, V;Torrent, J;de Grave, E
通讯作者：
de Grave, E