Analyses of the bulk oxidation state of marine manganese nodules indicates that more than 98% of the Mn in deep ocean nodules is present as Mn(IV). The samples were collected from three quite different areas: the hemipelagic environment of the Guatemala Basin, the pelagic area of the North Pacific, and seamounts in the central Pacific. Results of the study suggest that todorokite in marine nodules is fully oxidized and has the following stoichiometry: (K, Na, Ca, Ba).33(Mg, Cu, Ni).76Mn5O22(H2O)3.2. ?? 1984.
|Title||Oxidation state of marine manganese nodules|
|Authors||D. Z. Piper, J.R. Basler, J. L. Bischoff|
|Publication Subtype||Journal Article|
|Series Title||Geochimica et Cosmochimica Acta|
|Record Source||USGS Publications Warehouse|