Concentration factors for ore bodies of common metals

Table
Concentration factors for ore bodies of common metals
metal percent in
Earth's crust minimum percent
profitably extracted enrichment
factor necessary
for an ore body
aluminum 8.13     30       4
iron 5.00     30       6
manganese 0.10     35   350
chromium 0.02     30 1,500
copper 0.007     1   140
nickel 0.008   1.5   175
zinc 0.013     4   300
tin 0.004     1   250
lead 0.0016   4 2,500
uranium 0.0002 0.1   500
See as table:

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Universalium. 2010.

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