Little is known bout the pedogenetic differentiation in Alto Paranaíba, western Minas Gerais, Brazil, when materials with such a variety of chemical compositions as tufite, alkaline-ultramafic igneous rocks and carbonatites are compared, which are all found in this region. The purpose of this study was to characterize the physical, chemical and mineralogical properties of three representative soil topolitosequences of the Alto Paranaíba region. Therefore, 11 soil profiles were described and collected in the Serra do Salitre, Patrocínio and Coromandel counties, […]

The geochemical and mineralogical evolution was studied in three different alteration profiles of ultramafic (serpentine) rocks near Alpinópolis and Fortaleza de Minas, in southwestern Minas Gerais State (Brazil). Soil moisture and temperature regimes are udic and thermic, respectively. The current chemical and mineralogical evolution degree is moderate compared to other basic and ultramafic material of the same area and is characterized by significant losses of Na and Mg and, to a lesser extent, of Ca and Si. Very little K […]