Estrutura superficial e geoquímica da paisagem na bacia do Córrego Igrejinha, Juiz de Fora – MG.

Abstract

The present work aimed to understand the landscape in the dynamic-functional scope through the compartmentalization of different geomorphological and geochemical environments for the interpretation of the influence of the anthropogenic degree on the surface structure of the landscape in the Córrego Igrejinha Basin, located in the city of Juiz de Fora (MG). We sought to present a methodological approach encompassed by the study of the surface structure of the landscape according to its dynamic-functional aspects by compartmentalization techniques based on theoretical concepts of landscape geochemistry. The dynamic-functional compartmentalization defined the autonomous (eluvial zone) and subordinated (transeluvial, transaccumulative and accumulative zones) landscapes, making it possible to identify the emitting and receiving areas of materials. The identified landscapes, samples of surface coverings were collected, and laboratory tests were carried out where, through characterization through analytical chemistry, the chemical mobility in the walls of affinity and chemical reactions in chemical weathering were discussed. In possession of these results, the relationship between the dynamic-functional compartmentalization and its relationships with the geochemistry of the surface covers was discussed, the geochemical signatures of the trans-eluvial and cumulative zones were analyzed and the geochemical framework and the current technogenic organization were analyzed. As a result, it was possible to observe that human activities interfere in chemical weathering processes, changing the abundance of mineralogical phases in elemental landscapes.