Analysis of Mn-nodules from the Pacific

This report offers a description and further geochemical analysis of ocean manganese manganese deposits material available at the time in the New Zealand Oceanographic Institute collection. In particular, during cruise 36 of the USNS ELTANIN, large quantities of manganese nodules were collected at two stations in the South Tasman Basin, west of the Macquarie Ridge and north of the Indian-Antarctic Ridge, and sub-samples donated to the NZOI. The study covers also two large manganese nodules recovered by the R/V Vityaz South of Rarotonga (Cook islands), manganese crusts from phosphatized outcrops of the Aotea Seamount and further pea-shaped concretions from the Philippine Sea.