Mineral Commodity Summaries 2003 - Mineral Resources Program ...
Mineral Commodity Summaries 2003 - Mineral Resources Program ...
Mineral Commodity Summaries 2003 - Mineral Resources Program ...
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FIGURE 1.—Major Elements of <strong>Mineral</strong>-Resource Classification, Excluding Reserve Base and<br />
Inferred Reserve Base<br />
Cumulative Production<br />
ECONOMIC<br />
MARGINALLY<br />
ECONOMIC<br />
SUBECONOMIC<br />
Other<br />
Occurrences<br />
Cumulative Production<br />
ECONOMIC<br />
MARGINALLY<br />
ECONOMIC<br />
SUBECONOMIC<br />
Other<br />
Occurrences<br />
IDENTIFIED RESOURCES<br />
Demonstrated<br />
Measured Indicated<br />
Reserves<br />
Marginal Reserves<br />
Demonstrated Subeconomic<br />
<strong>Resources</strong><br />
FIGURE 2.—Reserve Base and Inferred Reserve Base Classification Categories<br />
IDENTIFIED RESOURCES UNDISCOVERED RESOURCES<br />
Demonstrated<br />
Measured Indicated<br />
Reserve<br />
Base<br />
Inferred<br />
Inferred<br />
Reserves<br />
Inferred<br />
Marginal<br />
Reserves<br />
Inferred<br />
Subeconomic<br />
<strong>Resources</strong><br />
Includes nonconventional and low-grade materials<br />
Inferred<br />
Inferred<br />
Reserve<br />
Base<br />
Includes nonconventional and low-grade materials<br />
UNDISCOVERED RESOURCES<br />
Probability Range<br />
(or)<br />
Hypothetical Speculative<br />
Probability Range<br />
Hypothetical (or) Speculative<br />
197
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