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Nickel isotope ratios were measured in ores, fly ash, slags and FeNi samples from two metallurgical plants located in the Goiás State, Brazil (Barro Alto, Niquelândia). This allowed investigating the mass-dependent fractionation of Ni isotopes during the Ni-laterite ore smelting and refining. Feeding material exhibits a large range of δ60Ni values (from 0.02 ± 0.10‰ to 0.20 ± 0.05‰, n = 7), explained...
The chemical weathering of continental surfaces depends on many factors including lithology, climate, tectonics, erosion, soil or vegetation, and also on the availability of acidity in the weathering zone. In addition to atmospheric/soil CO 2 , sulfide oxidation may represent a significant source of protons for weathering reactions as shown previously for the rivers draining the Mackenzie...
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