Glossary of Mining Terms
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O
On-Stream
Open Pit/Open Cut Mining
Open Stoping
Ore/Orebody
Ore Dressing
Ore Grade
Ore Pass
Ore Reserves
Oreshoot
Orogeny
Outcrop
Outlier
Overburden
Overmining
Overturned
Oxide Ore
Refers to the amount of minerals contained in an ore, calculated in grams per tonne, or troy ounces per tonne of gold for every one tonne of ore. see also: Grade
About Precious Metals.com 2005