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- W1851498339 abstract "The Ribeira Valley is an ancient Brazilian lead mining district where a kilometric As regional anomaly is known to be related to precious and base metal deposits. Stream sediment geochemical data collected during the 80`s in the Ribeira Valley were considered in this study. The focus was two-fold: (i) regional geochemical characterization and (ii) use of data closely related to the Furnas Pb mine in an attempt to explain how mining activities may affect geochemical signatures. Regression models for As and Pb were applied in a GIS environment considering the sub-watershed method. The occurrence of iron oxides, mafic rocks and metallic mineralizations in the region proved to be key factors that control the geochemical variance and were here employed to guide the modeling. Geochemical Pb-As anomalies verified at the Furnas mine strongly suggest a distinguished geochemical pattern, possibly related to mining activities." @default.
- W1851498339 created "2016-06-24" @default.
- W1851498339 creator A5023790242 @default.
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- W1851498339 date "2010-01-01" @default.
- W1851498339 modified "2023-10-03" @default.
- W1851498339 title "Discriminação de assinaturas geoquímicas por meio de modelos de regressão e sistema de informações geográficas: estudo de caso no Vale do Ribeira (SP)" @default.
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- W1851498339 doi "https://doi.org/10.5327/rbg.v40i3.1531" @default.
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