Geochemistry of a manganese nodule from the WALDA (R/V Jean Charcot) expedition

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.