2012
DOI: 10.1007/s12665-012-1799-4
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Evaluation of the mineral exploration influence on sediment composition in the Gualaxo do Norte River Basin (MG-Brazil) based on geochemical and stratigraphic data

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Cited by 20 publications
(14 citation statements)
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“…Therefore, the high concentrations present in the sediments of these two aquatic ecosystems suggest that the intense drainage of these elements into local reservoirs is amplified by the mining activity. Fe values greater than 300,000 mg/kg in the sediment contrast with much lower Fe concentrations observed in the sediment and water of lakes in the Iron Quadrangle that are not directly influenced by mining (Leite et al, 2010;Rodrigues et al, 2012) The presence of mineral tailings on the sediment can prevent the exchange of nutrients with the water column, affecting the complex biotic interactions in the aquatic food web (Routh et al, 2004;Liu et al, 2014. In addition, the presence of heavy metals in the sediment amplifies the temporal scale of the impacts, because of the temporary mobilization of elements and materials, besides chemical speciation, which can occur over a variety of scales, from hours (e.g., tidal influences), to months (seasonal processes), to years (e.g., climate change) (Birch et al, 2001).…”
Section: Discussionmentioning
confidence: 97%
“…Therefore, the high concentrations present in the sediments of these two aquatic ecosystems suggest that the intense drainage of these elements into local reservoirs is amplified by the mining activity. Fe values greater than 300,000 mg/kg in the sediment contrast with much lower Fe concentrations observed in the sediment and water of lakes in the Iron Quadrangle that are not directly influenced by mining (Leite et al, 2010;Rodrigues et al, 2012) The presence of mineral tailings on the sediment can prevent the exchange of nutrients with the water column, affecting the complex biotic interactions in the aquatic food web (Routh et al, 2004;Liu et al, 2014. In addition, the presence of heavy metals in the sediment amplifies the temporal scale of the impacts, because of the temporary mobilization of elements and materials, besides chemical speciation, which can occur over a variety of scales, from hours (e.g., tidal influences), to months (seasonal processes), to years (e.g., climate change) (Birch et al, 2001).…”
Section: Discussionmentioning
confidence: 97%
“…Nesse contexto, considerando a variedade de elementos possivelmente tóxicos associada às unidades geológicas que constituem o Quadrilátero Ferrífero e a intensa prática extrativista decorrente na região, que pode intensificar os processos de disponibilização dos mesmos, vários trabalhos realizados nessa região têm apresentado como um dos objetivos a obtenção das concentrações de metais/elementos traço em sistemas fluviais, dentre eles Eleutério (1997), Oliveira (1998), Borba et al (2000), Matschullat et al (2000), Costa (2001Costa ( , 2007, Costa et al (2006Costa et al ( , 2010, Rodrigues et al (2013Rodrigues et al ( , 2014. O estudo dos depósitos de barrancos e terraços possibilita a reconstrução da história da poluição nos sistemas fluviais causada por elementos traço, uma vez que o grau de contaminação é registrado nas respectivas fácies depositadas ao longo do tempo (Rodrigues et al, 2013).…”
Section: Introductionunclassified
“…Boa parte deles visam a prospecção de recursos minerais (por ex., Hale & Plant, 1995) enquanto, outros, mais recentemente, tratam do impacto da mineração nos sedimentos, sobretudo de elementos como o arsênio, mercúrio, crômio, chumbo e o cádmio (por ex. Botsou et al 2011;Mohiuddin et al, 2010;Rodrigues, 2012).…”
Section: Introductionunclassified
“…Nas bacias dos rios Doce e Velhas, estudos geoquímicos foram realizados objetivando entender os impactos ambientais decorrentes da mineração de ouro e de ferro, sobretudo na geoquímica de águas e sedimentos (Guedes et al, 2005;Rodrigues et al, 2012;Costa, 2001;Viglio & Cunha, 2010;Couto, 2011e Mendonça, 2012.…”
Section: Introductionunclassified
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