Chemical composition of Samoan Basin and Passage manganese nodules (Expedition MANGANESE 76, R/V Tangaroa)

Bulk chemical analyses of manganese nodules retrieved during the R.V. Tangaroa cruise of May-June 1976. The nodules occur on silty clay. Approximately two-thirds are either small (< 3 cm) spheroidals (often faceted) or small polynucleates with relatively uniform microbotryoidal surface textures.