文章基本信息

标题：CARACTERIZAÇÃO DOS LATOSSOLOS DA CHAPADA DE ARAGUARI: MINERAIS ARGILOSOS, GRANULOMETRIA E EVOLUÇÃO
本地全文：下载
作者：Luiz Antônio de Oliveira
期刊名称：Caminhos de Geografia
印刷版ISSN：1678-6343
出版年度：2003
卷号：4
期号：8
语种：English
出版社：EDUFU
摘要：The mineralogical composition of the latosols in the study area as determined by X-ray diffraction. Kaolinite and goethite is the dominant mineral in all profile (dark red, red-yellow and lateritic soils). Gibbsite is a common mineral present in the upper part of the profile (dark red and redyellow soils), while in the lateritic soil occur only in the “matriz�? fraction. Hematite happens in the topsoils (dark red and red-yellow soils). Quartz dominates the coarse fraction in all materials and shows a higher variability in sizes, although it is predominantly fine sand-size. Anatase were also detected in the topsoil. The mineralogical composition of the materials indicates a high degree of weathering of the parent material, wich caracteristic for oxisols in the humid tropics. Keywords: latosols, weathering, mineral and X-ray diffraction.