COPPER CONTENT 



IN WEIGHT PERCENT 



• • 



1.5-20 10-15 



HOtN, HO«N AND DELACH, 197}, lAMONT-OOHERTY. 

 IDOE/NSF 0X33616 TECHNICAL ■EPOm NO. 3 

 IllUSriATOR V KIPPON 

 COMPILATION: M PARSONS AND I. SUSSIILEAUX 



Figure 33. — Cooper deposits in the Pacific 

 Ocean. 



Sharman, G. F. Comparative Spreading History in the Gulf of 

 California, EOS Trans. Amer. Geophys. Union 53(11): 

 1027, November 1972. 



Shepherd, G. L., L. K. Wipperman, and R. Moberly. Shallow 

 Crustal Structure of the Peruvian Continental Margin, 

 Geol. Soc. Amer. Abstr. 5(1): 103, February 1973. 



Woollard, G. P. Geological and Geophysical Setting of the 

 Nazca Oceanic Plate and Evidence Concerning its Inter- 

 action with the South American Continental Plate, Geol. 

 Soc. Amer. Abstr. 5(1): 123, February 1973. 



Ocean Minerals Studies 



Another IDOE concern is the origin and distribution of 



manganese nodules. "Polymetallic" nodules is a more descrip- 

 tive term since, in addition to high percentages of iron and 

 manganese, nodules may contain cobalt, copper, and nickel in 

 economically attractive amounts. In contrast to projects in 

 metallogenesis, where the metals originating on the ocean floor 

 end up on landward formations, the nodules occur extensively 

 on the abyssal plains of the ocean. Since they occur at great 

 depths, the nodules, until recently, were regarded as little more 

 than a geological curiosity. Like the Green River oil shales and 

 the taconite deposits in Minnesota, changing technology makes 

 the nodules economically more attractive. 



To assess the present state of knowledge and plan future 

 studies, the Lamont-Doherty Geological Observatory (LDGO) 

 held a workshop/conference under IDOE auspices. The work- 

 shop covered scientific, technological, economic, and environ- 

 mental aspects of the subject. Since most deposits lie at great 



34 



