Ferromanganese crust chemical analyses. Samples from KK84 cruise from R/V Kana Keoki

The chemical composition of ferromanganese crusts retrieved during the KK84 cruise of R/V Kana Keoki was determined using methods developed by Toth, J. R. from Oregon State University (OSU). The composition in Mn,Fe,Al,Co,Ni,Cu was determined using flame atomic absorption spectroscopy (AAS). All AAS analyses were performed on samples after total digestion with hydrofluoric acid and aqua regia in Teflon-lined bombs.