Manganese nodule samples from the South and North Pacific were selected for the determination of their main and trace constituents. Results obtained by direct atomic-absorption determination of the elements in samples dissolved in 6 M hydrochloric acid (containing 2 % v/v of the hexoneisopropanol-HCl mixture). The following sensitivities for 1 % absorption are obtained: Mn = 0.10 ppm, Cu = 0.12 ppm, Co = 0.22 ppm. and Pb = 0.85 ppm. Uranium cocentration was determined by fluorimetry (Galvanek-Morrison fluorimeter, Mark V (Jarrel-Ash).

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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.This dataset represents the digitized Table 3, pp. 89 of the related publication.