and behaviour ot transuranium elements in the environment studied at Kanazawa University in Japan is presented. About 17 years ago, a high degree of accumulation of /sup 239/Pu in the surface soil of Nagasaki was found in the Nishiyama area, where ‘black rain’ occured just after the nuclear bomb explosion. The introduction of newly developed radiochemical methods and instrumentation has enabled studies to be carried out on environmental plutonium isotopes, americium-241 and more recently neptunium-237 with respect to distribution depth profile, variation with time and relationship with organic materials. Valuable information has been obtained on the basis of samples collected from various locations sediments, in Japan, including surface soil, atmospheric aerosol, sea and lake water from the Japan Sea and the Pacific Ocean, and from material related with the ’Bikini Event’ of 1954. Major Descriptors: *AMERICIUM 241 -- ENVIRONMENT; *AMERICIUM 241 -- FALLOUT ; *JAPAN -- FALLOUT; *NEPTUNIUM 237 -- ENVIRONMENT; *NEPTUNIUM 237 -FALLOUT; *PLUTONIUM 239 -- ENVIRONMENT; *PLUTONIUM 239 -- FALLOUT; *PLUTONIUM 239 -- ISOTOPE RATIO; *PLUTONIUM 240 -- ENVIRONMENT; *PLUTONIUM 240 -- FALLOUT; *PLUTONIUM 240 -- ISOTOPE RATIO; *SEAWATER ~- PLUTONIUM 239; *SEAWATER -- PLUTONIUM 240 Descriptors: CESIUM 137; DEPTH; ION EXCHANGE; NUCLEAR EXPLOSIONS; PACIFIC OCEAN; QUANTITATIVE CHEMICAL ANALYSIS; RADIOCHEMISTRY; SEDIMENTS; SOILS ; SOLVENT EXTRACTION; SURFACE WATERS Broader Terms: ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALKALI METAL ISOTOPES; ALPHA DECAY RADIOISOTOPES; AMERICIUM ISOTOPES; ASIA; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CESIUM ISOTOPES; CHEMICAL ANALYSIS; CHEMISTRY; DIMENSIONS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; EXPLOSIONS; EXTRACTION; HEAVY NUCLEI; HYDROGEN COMPOUNDS; ISOTOPES; NEPTUNIUM ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; OXYGEN COMPOUNDS 7 PLUTONIUM ISOTOPES; RADIOISOTOPES; SEAS; SEPARATION PROCESSES; SURFACE WATERS; WATER; YEARS LIVING RADIOISOTOPES Subject Categories: 510300* -- Environment, Terrestrial -~ Radioactive Materials Monitoring & Transport -- (-1989) 520300 -- Environment, Aquatic -- Radioactive Materials Monitoring & Transport -- (1989) 10/5/446 (Item 146 from file: 103) 02114835 NOV-87-082476; EDB-88-057561 Title: Cobalt-rich manganese crust potential of the U.S. Affiliated Territories Author(s): Clark, A.L.; Johnson, Trust and C.J. Affiliation: East-West Center Title: Eighteenth annual offshore technology conference. Volume 3 Conference Title: Offshore technology conference and exhibition Conference Location: Richardson, TX, USA Conference Date: 5 May 1986 Publisher: Offshore Technology Conference,Richardson, TX Publication Date: 1986 p 111-118 Report Number(s): Note: CONF-860552- Technical Paper OTC 5233 Document Type: Analytic of a Book; Conference Language: English Journal Announcement: EPA8712 Subfile: EPA (Energy Abstracts contractor) for literature Policy Analysis). NOV (DOE Country of Origin: United States Country of Publication: United States Abstract: Cobalt-rich manganese crusts are known to occur in potentially economic ’concentration within the EEZ areas of several Trust and Affiliated Territories and are inferred to occur in many others. A resource assessment of the potential of cobalt-rich manganese crusts was completed and based on the analysis, the following is a ranking of the U.S. Trust and Affiliated Territories, in decreasing order in terms of potential for economically viable concentration of cobalt crusts: Federated States of Micronesia, Marshall Islands, Commonwealth of BRANT 4