Key Words: GEOLOGY UNIT 4.3
- Created by: Brad_ers_B
- Created on: 02-04-15 13:23
Natural resource - a useful and valuable natural material
Mineral resources - can be metallic and non-metallic or industrial minerals
Reserves - the amount of the resource that can be extracted at a profit using existing technology
Ore deposit - an accumulation of metal that may be economic to mine
Average crustal abundance - describes the amount of metal in average continental crust
Concentration factor - the amount by which the metal is concentrated to make an ore deposit
Concentration factor = Concentration of metal in ore (grade) / Average crustal abundance
Ore - the rock containing valuable metal(s) that is economic to mine
Ore mineral - a mineral containing valuable metal(s)
Gangue mineral - a low-value waste mineral
Grade - the amount of metal in the ore
Cut-off grade - the minimum grade that is economic to mine
Cut-off grade = Average crustal abundance x Minimum concentration to be economic
Hydrothermal fluid - a hot, aqueous fluid containing dissolved metals in solution
Mineral vein - formed when minerals precipitate in a fracture
Country rock - the older rock (often sedimentary) surrounding an igneous intrusion
Precipitation - occurs as solid minerals come out of solution
Cumulate layer - the layer of dense minerals formed by…
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