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Título: | Sediment contamination in floodplains and alluvial terraces as an historical record of gold exploitation in the Carmo River basin, Southeast Quadrilátero Ferrífero, Minas Gerais, Brazil. |
Autor(es): | Costa, Adivane Terezinha Nalini Júnior, Hermínio Arias Castro, Paulo de Tarso Amorim Lena, Jorge Carvalho de Morgenstern, Peter Friese, Kurt |
Palavras-chave: | Sediment geochemistry Heavy meta Gold mining |
Data do documento: | 2006 |
Referência: | COSTA, A. T. et al. Sediment contamination in floodplains and alluvial terraces as an historical record of gold exploitation in the Carmo River basin, Southeast Quadrilátero Ferrífero, Minas Gerais, Brazil. Acta Hydrochimica et Hydrobiologica, v. 34, p. 245-256, 2006. Disponível em: <http://onlinelibrary.wiley.com/doi/10.1002/aheh.200400625/abstract>. Acesso em: 20 de jun. 2017. |
Resumo: | This paper describes the geochemistry of sediment samples placed in floodplains and alluvial terraces downstream from gold mines in the Carmo River basin, Quadril tero Ferr fero, Minas Gerais, Brazil. The geochemistry signature Na2O, K2O, SiO2, CaO, MgO, Al2O3, Fe2O3, TiO2, P2O5, Mn, As, Cu, Zn, Ba, Ni, Cr, S, Co were analyzed in different facies from stratigraphic profiles. As, Cu, Zn, and Mn anomalies are mainly associated with the clayed facies deposited in floodplains and oxbow lakes, and with coarse-sediment facies deposited in the channel. The facies were accumulated by the gold exploitation activity in the region. The contamination of As, Cu, and Zn was controlled by minerals such as iron oxides and hydroxides (hematite, magnetite, and mainly goethite), manganese oxides, and sulfide-rich minerals. The As-bearing sediments of the region characterize one of the most As contaminated area of Brazil. Their main source is associated with gold exploration in the last three centuries. |
URI: | http://www.repositorio.ufop.br/handle/123456789/8223 |
Link para o artigo: | http://onlinelibrary.wiley.com/doi/10.1002/aheh.200400625/abstract |
DOI: | https://doi.org/10.1002/aheh.200400625 |
ISSN: | 1863-0669 |
Aparece nas coleções: | DEGEO - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_SedimentContaminationFloodplains.pdf Restricted Access | 1,54 MB | Adobe PDF | Visualizar/Abrir |
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