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City San Diego / / Company Kennecott / Ocean Management Incorporated / Exploration Technologies / Ocean Mining Associates / Deep Sea Ventures / Ocean Minerals Company / / Country United States / United Kingdom / India / Japan / / Facility Southampton Oceanography Centre / National Institute of Ocean Technology / / IndustryTerm sonar technology / metal / sulphuric gas / free-fall devices / ore carrier / rigid steel pipe string / prototype nodule-mining system / chemical composition / mine site / metal market / metal sources / free-shuttle mining system consisting / copper solution / pick-up device / mining / hydraulic mining systems / nickelcobalt solution / technological solutions / communications cables / severe mining assumptions / energy / metal hydroxides / / NaturalFeature Atlantic Ocean / Pacific Ocean / Indian Ocean / Arctic Ocean / Blake Plateau / / Organization National Institute of Ocean Technology / International Seabed Authority / US Federal Reserve / United States Navy / Southampton Oceanography Centre / / Person Christina Loarie / Yoshio Masuda / John Mero / / Position large collector / motorized collector / Miner / Director / buoyancy Buffer Self-propelled collector / first collector / bottom collector / marine officer / operative / mechanical collector / / ProvinceOrState Florida / Hawaii / California / / Region north Indian Ocean / / Technology ion exchange / PROCESSING TECHNOLOGIES / MINING TECHNOLOGIES The technologies / GPS / crystallization / sonar technology / simulation / / SocialTag 
PROCESSING TECHNOLOGIES Many processes have been investigated to treat polymetallic nodules. Initially the extraction of only three metals was considered: nickel, copper and cobalt. After 1978, manganese was added to inc