139736eo.pdf (20MB) - Japan Oceanographic Data Center

Table 4. Chemical composition of polymetallic nodules from the Indian OceanBasin/Ridge No. of No. of Maximumlocations analyses M n Fe Ni Cu CO Ni+Cu+CoCentral Indian Ocean 48 84 19.33 12.75 0.71 0.55 ,0.121.26Wharton Basin 81 105 17.99 11.73 0.49 0.33 0.20 1.03South Australian Basin 13 25 19.00 13.40 0.68 0.34 0.17 1 .i9Crozet Basin 31 68 13.49 15.93 0.33 0.15 0.20 0.68MadgascarBasin 28 64 14.55 19.60 0.28 0.14 0.34 0.68Mozambique Basin 46 101 11.82 16.05 0.41 0.12 0.21 0.73Seychelles/Somali Basin 37 323 18.12 16.61 0.36 0.12 0.40 0.85Carlsberg Ridge 28 73 12.67 17.50 0.25 0.11 0.20 0.58Average Indian Ocean 299 818 15.42 15.75 0.40 Oil6 0.30 0.88Central Indian Ocean 48 84 1.80 4.50 0.50 0.06 0.04 0.15Wharton Basin 81 105 3.47 3.80 0.06 0.04 0.03 .0.13South Australian Basin 13 25 2.43 5.35 0.03 0.01 0.03 0.07Crozet Basin 31 68 5.00 8.00 0.10 0.09 0.08 0.18Madgascar Basin 28 64 8.50 9.70 0.06 0.06 0.08 0.20Mozambique Basin 46 101 0.79 4.25 0.01 0.05 0.01 0.70SeychelledSomali Basin 37 323 3.72 1.33 0.09 0.02 0.03 0.14Carlsberg Ridge 28 73 1.50 9.60 0.02 0.02 0.03 0.07Average Indian Ocean 299 818 0.79 1.33 0.01 0.01 0.01 0.07From: UNOET/SIO Data Bank139