340 • Marine Minerals: Exploring Our New Ocean Frontier 



common depth point seismic data: 264 

 consumption, mineral commodities: 82, 83 



general: 82 



nickel: 83 



platinum-group metals: 83 



titanium: 83 

 continental: 3, 7, 41, 42, 45, 47, 49, 50, 52, 57-59 



drift: 3 



margins: 41 



sea: 41, 42 



shelf: 7, 45, 47, 49, 50, 52, 57, 58, 59 



slope: 57 

 continuous casting, steel: 89 



continuous seafloor sediment sampler: 144, 149, 151 

 Convention on the Continental Shelf: 29 

 copper, commodities: 



demand and technological trends: 98 



domestic production: 98 



properties and uses: 97 



resources and reserves: 98 

 coring devices: 118, 155-158 



box core: 156 



costs: 158 



impact corers: 155 



vibracores: 154, 155, 157, 158 

 Cross Seamount: 242-243 



dacites: 57 



data classification: 139, 268-277 



and Navy: 272, 275 



and NOAA: 272, 275 



and ocean mining interests: 273 



costs to scientific and commercial interests: 273 



foreign policy implications: 275 



risks to national security: 270-272 

 data collection and management: 21, 23, 32, 250-268 



academic and private laboratories: 267 



constraints: 251-254 



Department of the Interior: 263-265 



industry: 267-268 



missing components: 252 



NASA: 265-266 



Navy: 266-267 



NOAA: 256-263 



State and local governments: 267 

 Deep Ocean Mining Environmental Study: 215, 236-242 



and manganese nodule recovery: 236-237 



objectives: 237 



recommendations for future research: 240 

 deep sea mining environmental impacts: 237-238 

 Deep Sea Drilling Project: 137 

 Deep Seabed Hard Mineral Resourcess Act: 29, 237, 



305-306 

 deep submergence laboratory: 152 

 Deep Tow: 124, 149 



deep water environmental effects: 218, 226, 236-245 

 Deepsea Ventures: 159 

 Defense Production Act: 92 

 deltas: 42, 54, 55 

 Department of the Interior: 22, 56, 182 



diorite intrusives: 58 



direct current resistivity: 140-141 



Dominican Republic: 96 



downhole sampling: 162 



drag sampling: 155 



Dredge Material Research Program, Corps of Engineers: 



215 

 dredge mining technology, air lift suction: 176 

 dredge mining technology, bucket ladder-bucket line: 171 



capacities: 171 



capital costs: 171 



limitations: 171 



operating costs: 171 



operating depths: 171 

 dredge mining technology, bucket wheel suction: 176 

 dredge mining technology, cutter head suction dredge: 

 174-175 



capabilities: 175 



capital costs: 175 



description: 174 

 dredge mining technologies, general: 18 

 dredge mining technology, grab dredge: 177 

 dredge mining technology, hopper dredge: 173-174 



capabilities: 174 



capacities: 173 



capital costs: 174 



description: 173 

 dredge mining technology, new developments and trends: 

 179-180 



increasing operating depth: 180 



motion compensation, stability: 179 

 dredge mining technology, suction dredge: 172-173 



capacities: 172 



components: 172 



limitations: 172 



price and costs: 173 



types: 172 

 dredges, environmental impacts: 233-234 

 drill ships: 18 

 drilling, percussion: 156-157 



Amdril: 156-157 



Becker Hammer Drill: 156-158 



vibralift: 157 



E.I. du Pont de Nemours & Co., Inc.: 105, 193 

 ECHO I, expedition: 239 

 ecological: 20, 21 



deep-sea communities: 21 



information: 20 

 East-West Center: 73, 74 

 electrical techniques: 139-143 



direct current resistivity: 140-141 



electromagnetic methods: 140 



horizontal electric dipole: 140 



induced polarization: 141-143 



induced polarization and titanium minerals: 142 



induced polarization for core analysis: 143 



MOSES: 140 



reconnaissan,ce induced polarization: 141 



self-potential: 141 



