Manganese nodules also called polymetallic nodules, are spherical rock concretions formed at the bottom of the sea. Due to their high polymetallic content, they are discussed as a natural resource material. Recharacterized after milling
OriginPacific Ocean, 14°50'N., 124°28'W, depth 4340 meters
- Major components are MnO (38 %m/m), SiO (14 %m/m) and FeO (8 %m/m).
- Other major elements are also present with 2-5 %m/m.
- Transition metals are highly enriched (> 10000 µg/g).
- Most trace elements and REEs are in the 10-500 µg/g range.
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Sulfides and ores
Trace element concentrations in ore minerals are an important consideration in exploration, ore beneficiation, recycling, and reservoir exploration.