Classifications of gold-bearing materials
According to their mineralogical and historical characteristics the gold- bearing material can be classified as:
- Placers.
- Free milling ores.
- Oxidized ores.
- Silver-rich ores.
- Iron sulphides.
- Arsenic sulphides.
- Copper sulphides.
- Antimony sulphides.
- Tellurides.
- Carbonaceous.
Each of these classes of gold bearing materials has especial mineralogical characteristics which affect their processing and are considered in the next sections.
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