84 • Marine Minerals: Exploring Our New Ocean Frontier 



Figure 3-2.— Price Trends for Selected 

 Seabed IMineral Commodities 



200 



150 



100 



50 



1955 



o 



II 



360 



310 



260 



210 



160 



110 



60 



10 

 1860 



360 



310 — 

 260 I— 

 210 

 160 I- 



110 



60 



10 

 1860 



360 

 310 

 260 

 210 

 160 

 110 

 60 



10 

 1860 



1880 



1880 



I 



1880 



Sand/gravel 



1965 



1975 



Phosphate 



1900 



1920 



1940 



Chromite 



1900 



1920 



1940 



Titanium 



± 



1900 



1920 

 Year 

 Legend Actual indexed price 



1960 



1960 



1940 I960 



Linear trend 



1985 



1980 



1980 



1980 



Prices of several commodities that are derived from minerals known to occur on the seabed w/ithin the U.S. EEZ can change 

 abruptly in world markets. 



SOURCE; J.M. Broadus, "Seabed Materials," Science, vol. 235. Feb. 20, 1987, p. 857 (modified and abbreviated).- 



