Stratification of parent material in European volcanic and related soils studied by laser-diffraction grain-sizing and chemical analysis

被引:23
作者
Buurman, P
Rodeja, EG
Cortizas, AM
van Doesburg, JDJ
机构
[1] Univ Wageningen & Res Ctr, Lab Soil Sci & Geol, NL-6700 AA Wageningen, Netherlands
[2] Univ Santiago, Dept Edafol & Quim Agr, Santiago De Compostela 15706, Spain
关键词
volcanic ash soils; andosols; stratification; element ratios; laser-diffraction grain-sizing; field description; cluster analysis;
D O I
10.1016/j.catena.2003.10.007
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Sedimentary stratification identified by field descriptions of 12 soils derived wholly or partly from volcanic materials was compared with results obtained by chemical analyses (contents and ratios of lithogenic elements, contents of heavy metals) and detailed grain-size data after removal of organic matter and amorphous fractions. The finest sedimentary stratification was indicated by cluster analysis of ratios of lithogenic elements and by the grain-size analyses. Sedimentary stratification in the field is difficult to determine or describe when (1) the deposits are strongly weathered, (2) soil horizon boundaries coincide with stratification boundaries or (3) stratification is very fine. Nevertheless, field descriptions are a reasonably good way of differentiating parent materials, though they often underestimate the number of sedimentary layers. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:127 / 144
页数:18
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