Illustration of manganese nodules and crust collected from the Suiko Seamount, Northwestern Pacific Ocean

An initial investigation has been undertaken on the chemical composition of the manganese nodules. The results of chemical analyses on each layer of single nodules reveal the periodic patterns of distribution for Mn, Fe, Cu, Pb, Zn, Ni and Co contents. The variations strongly suggest that those of the elements in nodules from this region are, at least, climatically controlled.

Illustration of manganese nodules and crust collected from the Suiko Seamount, Northwestern Pacific Ocean

Manganese nodules from the Suiko Seamount exhibit the significant characteristics in mineral compositions. Well crystallized todorokite and birnessite, which are principal manganese mineral phase in nodules, only occur in the oxide layer directly incasing pebbles and coarse sand. The preferential formation of todorokite or birnessite phases seem to be principally controlled by the reaction rate of iron-manganese oxides with trace elements such as Cu, Ni, Co, Zn, Pb concentrated in nodules, rather than redox characteristics of sedimentary environment or mineralogical diagenetic process.

The office of motor carriers 5-year research and technology plan.

Mode of access: Internet.

Supplemental driver safety program development. Volume I: developmental research and evaluation. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Supplemental driver safety program development. Volume II: pilot and field test module materials. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Agricultural development of Panama; analysis of current problems and recommendations for a program.

Cover title.

National Household Education Survey of 1995 : adult education data file user's manual /

Mode of access: Internet.

Survey of solidification/stabilization technology for hazardous industrial wastes /

Mode of access: Internet.

Development of methods and techniques for final treatment of combined municipal and textile wastewater, including sludge utilization and disposal /

Issued Dec. 1979.

Effects of mirex, methoxychlor, and malathion on development of crabs /

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Development of treatment and control technology for refractory petrochemical wastes /

Mode of access: Internet.

Eastern lake survey-phase II : national stream survey-phase I : processing laboratory operations report.

Mode of access: Internet.

Lap belt angle measurement in adjustable rear seats: procedure development and vehicle survey. Final report.

National Highway Traffic Safety Administration, Washington, D.C.