Browsing by Author "da Rocha Nascimento, Wilson"

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    Methodological approach and general guidelines to geochemical mapping and background-baseline analysis for environmental assessment: a case study in the Caraj�s Mineral Province, Brazil
    (Sociedade Brasileira de Geologia, 2023-01-09T00:00:00) Souza-Filho, Pedro Walfir Martins; Sahoo, Prafulla Kumar; da Silva, Marcio Sousa; Dall�Agnol, Roberto; Filho, Carlos Augusto Medeiros; Leite, Alessandro Sab�; da Silva Ferreira J�nior, Jair; da Rocha Nascimento, Wilson; da Silva e Silva, G�ssica; Salom�o, Gabriel Negreiros; Sarracini, Fabiana; Junior, Renato Oliveira Silva; da Costa, Marlene Furtado
    We present this manuscript as a methodological approach and general guidelines for geochemical mapping and background/baseline projects for environmental assessment in tropical areas. A case study was carried out in the Itacai�nas River watershed (IRW), Eastern Amazon, to fill in a gap in knowledge on the distribution of chemical elements, particularly those potentially toxic, in the near-surface environment of the area. The high-impact results of this research project revealed the need for similar scientific investigation across the globe with the implementation of a systematic methodology. The study shows, for example, the importance of well-planned field activities, multi-medium sampling, analytical methods, laboratory procedures, database construction, and general aspects of data processing and statistical treatment. The importance of this contribution is that it can be used as a reference in support of geospatial analysis in research within the scope of geochemical mapping and background-baseline projects. The database is accessible through a web-based geographic information system front-end; a Geochemical Atlas of the IRW will be available as soon as possible. � 2022 The authors.