Annotated record of the detailed examination of manganese nodules from around the world oceans

• Main Authors: Sorem, Ronald K, Foster, Allan R
• Format: Dataset
• Language: English
• Published: PANGAEA 1972
• Subjects: Blake Plateau; Atlantic Ocean; Carlsberg Ridge; D16; D6269; Date/Time of event; Deposit type; DEPTH; sediment/rock; Description; Discovery (1962); Dredge; rock; DRG; DRG_R; DSV70-BP3; Elevation of event; ELT06; ELT06.007-BT; Eltanin; Event label; Latitude of event; Longitude of event; Method/Device of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; Position; Quantity of deposit; Sample code/label; Sample ID; SAN_JUAN_1963; Size; SNJ-DH3; SNJ-DH5; Southern Ocean; Spencer F. Baird; Substrate type; TRAWL; Trawl net; Uniform resource locator/link to image; Baja; Pacific
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.879759; https://doi.org/10.1594/PANGAEA.879759

Manganese nodules collected off Baja California have layers (zones) which are texturally and compositionally distinct. Massive and mottled zones consist mostly of cryptocrystalline todorokite and birnessite containing relatively high concentrations of Mn, Ni and Cu. Compact, columnar and laminated zones consist mostly of more iron- rich opaque amorphous material. Within these two groups the individual zones can be distinguished in part by their clay content. These results indicate that systematic research on nodule chemistry, mineralogy, growth rates and beneficiation should include careful analysis of individual layers within the nodules.