The paper presents preliminary resutls of the atmospheric module of a comprehensive study aiming to evalaute the impact of manganese and gold mining activities to the natural environment of tropical rain forest in Amapa State, Norht Brazil. This project entitled: "The mercury cycle in Amazonian Forest Ecosystem: evalaution of gold mining activities impact, in Amapa State". sponsored by the National Research Council (CNPq), has the objective to promote the understanding of trace elements cycles in atmosphere and in aquatic and terrestrial ecosystems, mainly the mercury due to the gold mining activities. The atmospheric module has been composed by a several field campaigns where the particulate matter (PM) was analysed for the determination of shape and composition by means of collecting inhalable particles as well as the surface metorological analysis were performed of other meteorological surface data. The aim of this proejct is to shwo a significant correlation between the meteorological events and the seasonal variability of atmospheric constituents.
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