Question

Pls Answer this question from Minerals and Energy Resources

Answer 1

Minerals can be divided as follows:

On the basis of commercial value

1) Metallic- from which valuable metals (e.g. iron, copper) can be extracted for commercial use
2) Non Metallic- they are valuable, not for the metals they contain, but for their properties as chemical compounds. Ex, halite for sodium chloride and borax for borates.

Mineral Deposits (General Classification)

Hydro-thermal- formed when minerals are deposited by hot, aqueous solutions flowing through fractures and pore spaces of crustal rock

Magmatic-formed when minerals are deposited by hot, aqueous solutions flowing through fractures and pore spaces of crustal rock

Sedimentary-Water soluble salts can form sedimentary mineral deposits when they precipitate during evaporation of lake or seawater

Placer-Minerals with a high specific gravity (e.g. gold, platinum, diamonds) can be concentrated by flowing water in placer deposits found in stream beds and along shorelines.

Residual- formed form when weathering processes remove water soluble minerals from an area, leaving a concentration
of less soluble minerals
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