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(i) Mode of occurrence of minerals Minerals that occur at or near the surface can be cheaply mined
using Open Cast Mining Method or Alluvial Mining Method while mineral that occur at great depths
in the earth’s crust are expensive to extract hence deep shaft method can be applied.
(ii) Quality of the ore The higher grade ores that have no impurities are economical to mine as they
yield large amount of good quality mineral than low grades ore.
(iii) The size of the mineral deposit. Large mineral resources justify the installation of expensive
equipment for exploitation while in small reserves, cheap affordable methods are employed. If the
mineral is of high value, high powered machines can be used on small quantity deposit.
gideon1 answered the question on September 29, 2017 at 17:31
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