Dissertations and Theses

Summary

The geological diversity of Plateau conditioned the formation of various soils, predominantly kaolinite in the clay fraction, iron oxides and hydroxides and gibbsite. Among these, the oxides and hydroxides of iron and gibbsite are considered environmental pedoindicadores in the tropical region. Thus, aimed to characterize the oxides and hydroxides of iron (hematite and goethite), kaolinite and gibbsite Western Paulista Plateau and associate them with the landscape of the state of play in different environments with total iron content. Based on geological, geomorphological and amplitude variation of pedogenic iron levels (Fed and Feo). Twelve soil samples were collected at a depth 0.0 to 0.2 m for mineralogical and spectral characterization. The magnitude of the total contents obtained by digestion with sulfuric acid showed the difference in the source material, geology, geomorphology and pedogenesis intensity. In soils Training Fish River Valley predominated kaolinitic mineralogy, while the Serra Geral Formation, hematítica. The granulometric, chemical and mineralogical attributes were influenced by the degree of dissection of the Western Paulista Plateau soil. The spectral behavior of the regions at different stages of dissection were different in the spectral range of oxides (530 to 570 nm) and kaolinite (1880 to 2380 nm). The kaolinite was better environmental indicators to characterize the landscape in different stages of dissection in sandy soils, whereas hematite and goethite were better environmental indicators to characterize the landscape at different stages of dissection in basalt soils. This result may help to understand the evolution of the landscape and soil in other sedimentary basins.