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Minerals Report - International Seabed Authority

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Table 10: Critical Factors for Mining of Seafloor Polymetallic Sulphides<br />

- Reliable size and tonnage calculation based on drilling and coring<br />

- Chemical analyses of representative bulk samples to establish average metal<br />

grades<br />

- Development and test of suitable mining techniques and systems<br />

- Economic feasibility analysis<br />

- Environmental impact study<br />

ACKNOWLEDGMENTS<br />

Our research on modern and ancient seafloor hydrothermal systems is<br />

supported by the Leibniz-Program of the German Research Foundation<br />

(DFG).<br />

REFERENCES<br />

1. J. Francheteau, H.D. Needham, P. Choukroune, T. Juteau, M. Seguret,<br />

R.D. Ballard, P.J. Fox, W. Normark, A. Carranza, D. Cordoba, J.<br />

Guerrero, C. Rangin, H. Bougault, P. Cambon, and R. Hekinian (1979),<br />

Massive deep-sea sulphide ore deposits discovered on the East Pacific<br />

Rise. Nature, 277, 523-528.<br />

2. F.N. Spiess, K.C. Macdonald, T. Atwater, R. Ballard, A. Carranza, D.<br />

Cordoba, C. Cox, V.M. Diaz Garcia, J. Francheteau, J. Guerro, J.W.<br />

Hawkins, R. Haymon, R. Hessler, T. Juteau, M. Kastner, R. Larson, B.<br />

Luyendyk, J.D. Macdougall, S. Miller, W. Normark, J. Orcutt, C. Rangin<br />

(1980), East Pacific Rise. Hot springs and geophysical experiments.<br />

Science, 207: 1421-1433.<br />

INTERNATIONAL SEABED AUTHORITY 133

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