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- W3091650892 abstract "Detailed multidisciplinary investigation of selected tailings storage facilities (TSFs) from the Witwatersrand gold mines generated datasets of mineralogy, chemistry, hydraulic properties, oxygen content with depth and leachate pore water chemistry. Three oxidation zones, namely mature oxidation (MOZ), transitional oxidation (TZ) and unoxidized (UZ) are recognized and mapped. Pyrite, the major primary sulfide mineral, generally increases with depth, whereas jarosite appears at shallow depth at the expense of pyrite and decreases with depth, consistent with the progression of the oxidation front. Slight modifications of grain size distribution due to oxidation is evident. Hydraulic conductivity and moisture content increases and residual water content decreases with depth. Oxygen diffusion varies from 2 to 5 m with an average of about 4 m depth, correlating well with the measured oxidation zone thicknesses. Sulfide minerals paragenesis, relative depletion and enrichment of certain major and trace elements in the MOZ and the TZ, respectively, and the pore water pH in the OZ, all indicate oxidation process reached “Late Stage” in the TSFs. This study indicates that integrated investigation provides insights in the kinetics of oxidation processes and establishes a relationship between the volume of oxidized part of a TSF and the volume and quality of generated AMD." @default.
- W3091650892 created "2020-10-08" @default.
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- W3091650892 date "2020-09-03" @default.
- W3091650892 modified "2023-09-26" @default.
- W3091650892 title "Oxidation Processes and Formation of Acid Mine Drainage from Gold Mine Tailings" @default.
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- W3091650892 doi "https://doi.org/10.1002/9781119620204.ch4" @default.
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