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By Sergey M. Rodionov1, Alexander A. Obolenskiy2


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Tabular Descriptions for Sizes of Lode Deposits


Size categories for lode mineral deposits, adapted from Guild (1981), are listed below. These size categories define the terms world class, large, medium, and small. These size categories are used mainly in the parts of Table 1 on the lode deposits in the Russian Far East where specific tonnage and grade data are not yet available. The small category may include occurrences of unknown size. Units are metric tons (tones) of metal or mineral contained, unless otherwise specified.

Table 2. Size categories for lode mineral deposits, adapted from Guild (1981).

Metal

World Class >

Large >

Medium >

< Small
















Antimony




50,000

5,000




Barite (BaSO4)




5,000,000

50,000




Chromium

(Cr2O3)






1,000,000

10,000




Cobalt




20,000

1,000




Copper

5 million

1,000,000

50,000




Gold




500

25




Iron (ore)




100,000,000

5,000,000




Lead

5 million

1,000,000

50,000




Magnesium

(MgCO3)






10,000,000

100,000




Manganese

(tons of 40% Mn)






10,000,000

100,000




Mercury

(flasks)





500,000

10,000




Molybdenum

500,000

200,000

5,000




Nickel

1 million

500,000

25,000




Niobium-Tantalum (R2O5)




100,000

1,000




Platinum group




500

25




Pyrite (FeS2)




20,000,000

200,000




Rare earths (RE203)




1,000,000

1,000




Silver




10,000

500




Tin




100,000

5,000




Titanium (Ti02)




10,000,000

1,000,000




Tungsten

30,000

10,000

500




Vanadium

30,000

10,000

500




Zinc

5 million

1,000,000

50,000





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