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Water with a pH of less than 6.0 and where acidity exceeds alkalinity

Acidic water run-off from mine waste dumps and mill tailings ponds containing sulphide minerals

Igneous rock carrying with 65% or more silica

Having a low pH caused by sulphur dioxide and nitric oxide gases, usually introduced by human industrial activity

Accumulation of sedimentary material

Minerals found alongside or in association with the primary target mineral

Areas of past geological or development work no longer maintained or not under current exploration

A machine that uses velocity to electrically charge atomic particles such as electrons, protons, deuterons, and alpha particles, or a substance added to increase chemical reaction

Machine using air flow to induce separation of aerophilic and hydrophilic particles Air bubbles of a lower pressure lift aerophilic particles to an overflow thereby separating hydrophilic particles

Rock or various type and grade, including sand, used in many cases as fill