During the 1971 WALDA expedition of the R/V Jean Charcot in the Equatorial and South Atlantic, manganese nodules were recovered at Station 24 - DS 17 at the base of the continental platform off the coast of Angola. They were analysed at the Laboratoire de Géochimie des Eaux, Université Paris VII Denis Diderot.

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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Supplement to: Renard, D (1972): Geochemistry of a manganese nodule from the WALDA (R/V Jean Charcot) expedition (unpublished report). In: Monget, J. M., Murray, J. W., Mascle, J., 1976. A world-wide compilation of published, multicomponent/analyses of ferromanganese concretions. Seabed Assessment Program, IDOE, NSF, Washington D.C., U.S.A., Technical Report., 12(NSF GX-33616)