A bluish, compacted soil strata, usually several feet thick and is often indicative of placer minerals
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Category: <span>B</span>
A rock having formed through biological means
A rough technique of assay where the target minerals are oxidized by torch and oxidation states observed
A process for recovering metals from ores using bacterial solution
Usually a deposit that contains positive target indicator minerals without itself containing target minerals
Where an orebody is mined by excavating a cavity underneath the target ore, collapsing the ore into the cavity
Basic smelter run copper having reached near purity
A drill hole filled with explosive charge and detonated
A vessel where raw ore and fuels are enriched with compressed air to increase reaction
An employee or contractor responsible for the proper use and care of explosives