Five nodules collected on Leg 28 of the Deep Sea Drilling Project are unique in that they provide an opportunity of studying older, buried nodules. Paleontological evidence from the cores suggests they may be from Miocene to Pliocene in age. The thinness of the ferromanganese coatings on the nuclei suggests that rapid burial took place. They differ from the few analyzed surface nodules from the South Pacific in that the Mn and Ni concentrations of the buried nodules are lower, and the Co concentrations are slightly higher. The Fe and Cu concentrations are similar. There is no evidence that either leaching or remobilization of any of these elements has taken place subsequent to burial.

From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.

Supplement to: Aumento, Fabrizio; MacGillivray, J M (1975): Geochemistry of Buried MiocenePleistocene Ferromanganese Nodules from the Antarctic Ocean. In: Hayes, D.E.; Frakes, L.A.; et al., Initial Reports of the Deep Sea Drilling Project, Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, XXVIII, 795-803