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Composition of Pacific Ocean ferromanganese nodules

January 25, 1977

Bulk composition of ferromanganese nodules from the pelagic environment of the Pacific Ocean is apparently related to nodule-growth rate, sediment-accumulation rate, and biologic productivity in the overlying seawater. Nodules with a high MnFe">MnFe ratio and high Ni and Cu concentrations tend to occur in areas where primary productivity in the surface layer of the ocean is high and the sediment-accumulation rate low. Nodules with a low MnFe">MnFe ratio and low Ni and Cu concentrations occur in areas either where sediment-accumulation rate is high or biologic productivity is low. They may have a MnFe">MnFe ratio as low as one and accrete at rates as low as 1mm106yrs">1mm106yrs. Nodules with a larger MnFe">MnFe ratio apparently have growth rates that are greater by as much as a factor of 10.

Publication Year 1977
Title Composition of Pacific Ocean ferromanganese nodules
DOI 10.1016/0025-3227(77)90036-6
Authors David Z. Piper, M.E. Williamson
Publication Type Article
Publication Subtype Journal Article
Series Title Marine Geology
Index ID 70208057
Record Source USGS Publications Warehouse
USGS Organization Geology, Minerals, Energy, and Geophysics Science Center