Marine Science Affairs 



Table 11-6 — United States and World Land Reserves and Resources of 

 Some Metals and Nonmetals That Occur on the Continental Shelves 



Commodity 



Aluminum (bauxite, millions, 

 long tons) 



Beryllium (short tons, equiv. 

 beryl) 



Chromium (millions, long tons, 

 chromite) 



Copper (millions, short tons) 



Cobalt (thousands, short tons)-.. 



Gold (millions, troy ounces) 



Industrial diamonds (million 



carats)-. 



Iron ore (millions, long tons) 



Manganese ore (millions, long 



tons) 



Nickel (thousands, short tons)... 

 Phosphate (millions, long tons).- 

 Potash, (miUions, short tons, 



KjO) 



Platinum group (millions, troy 



ounces) . 



Rare earths (millions, short tons) 



Silver (millions, troy ounces) 



Sulfur (milUons, short tons) - 



Tin (thousands, long tons) 



Titanium (millions, short tons, 



TiOs) 100 



Thorium (thousands, short tons, 



Th02) 



Tungsten (thousands, short tons). 70 



Uranium (thousands, short tons, 



UsOs) 210 



Vanadium (thousands, short tons) . 200 



Zircon (millions, short tons) . 6 



500 



(') 



(") 



100 



" Minable reserves are materials that may or may not be completely explored but that may be quantita- 

 tively estimated and are considered to be economically exploitable at the time of the estimate. 



"> Resources are materials other than reserves that are prospectively usable and include undiscovered 

 recoverable resources as well as those whose exploitation requires more favorable economic conditions. 



« Unknown. <* Vast. • Several billion. / Demand figures include a significant quantity of recycled 

 metal. » Very large. 



Source: Department of Inteilor. 



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