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Minerals Report - International Seabed Authority

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Table 3: Geochemistry of known massive sulphides deposits<br />

Area Site Cu<br />

%<br />

Zn<br />

%<br />

Pb<br />

%<br />

Okinawa Okinawa all 3.10 24.50 12.10 4.80 10.20 3.3 1160 31000 17<br />

Fe<br />

%<br />

Minami 3.70 20.10 9.30 4.8 1900 9<br />

Si02<br />

%<br />

INTERNATIONAL SEABED AUTHORITY 434<br />

Au<br />

ppm<br />

Ag<br />

ppm<br />

Izena 4.70 26.40 15.30 4.9 1645<br />

Japan Myojin-sho 2.10 36.60 6.08 1.6 260 5.65<br />

Suiyo 12.60 28.80 0.80 28.9 203<br />

Mariana Mariana 1.20 10.00 7.40 2.40 1.20 0.8 184 126 11<br />

PNG Pacmanus 10.90 26.90 1.70 14.90 0.80 15.0 230 11000 26<br />

Susu 15.00 3.00 21.0 130<br />

N Fidji N Fidji 7.50 6.60 0.06 30.10 16.20 1.0 151 24<br />

Lau Valu Fa 4.60 16.10 0.30 17.40 12.50 1.4 256 2213 47<br />

White Chch 3.32 11.17 0.23 7.17 22.12 2.0 107 13<br />

Vai Lili 7.05 26.27 0.17 10.46 10.48 0.6 143 11<br />

Hine Hina 3.32 10.87 0.59 34.57 1.76 1.7 517 5<br />

N Atlantic TAG Miller 3.10 0.14 0.00 31.00 0.4 3 23<br />

TAGHannington 2.70 0.45 0.01 23.00 55.00 0.5 14 43 66<br />

TAG Scott 9.20 7.60 0.05 24.40 6.00 2.1 72 40 14.5<br />

Snake Pit 2.00 4.80 0.03 34.00 1.80 1.5 50 2.4<br />

NE Pac. Explorer 3.20 5.30 0.11 25.90 9.10 0.63 97 66 3.0<br />

Endeavour 3.00 4.30 188 31<br />

Juan de Fuca 1.40 34.30 0.1 169 11 8.8<br />

Juan de Fuca 0.20 36.70 0.26 19.70 5.10 0.1 178<br />

Escanaba 1.00 11.90 187 7<br />

EPR Rivera 1.30 19.50 0.10 0.1 157<br />

EPR 14°N 2.80 4.70 0.5 48<br />

EPR 13°N 7.80 8.20 0.05 26.00 9.20 0.4 49 5.8<br />

EPR 11°N 1.90 28.00 0.07 22.40 1.20 0.2 38<br />

EPR 2°N 0.60 19.80 0.21 12.40 19.00 0.2 98<br />

EPR 17°S 10.19 8.54 31.28 2.05 0.3 55 141 19<br />

EPR 7°S 11.14 2.13 34.63 3.45 0.05 23 122 14<br />

EPR 20°S 6.80 11.40 0.5 121<br />

California Guaymas 0.20 0.90 0.40 78 23.0<br />

Galapagos 4.10 2.10 0.2 35 10.0<br />

mean 4.71 14.07 2.41 21.40 10.40 3.19 263 6378<br />

mini 0.20 0.14 0.00 2.40 0.80 0.05 3 43<br />

maxi 15.00 36.70 15.30 34.63 55.00 28.90 1900 31000<br />

Compiled from references: [19-34-35-42-47]. T (Mt) rough evaluation of possible tonnage. Ppm = g t -1<br />

Some authors have searched for a correlation between the different<br />

metal compositions [42]. However, due to the limited number of samples and<br />

their complex mineralogical composition, the results are likely not significant.<br />

Surprisingly, gold and silver are correlated to zinc, whereas gold is normally<br />

confined in the lattice of pyrrhotite and chalcopyrite, and silver with lead. The<br />

presence of arsenic, which is a reagent killer, in some deposits, can create<br />

difficulties during ore processing.<br />

As<br />

ppm<br />

Nb<br />

sp<br />

T<br />

Mt

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