Precious and Nonferrous Metals in the Ferromanganese Crusts
of the Central Sea of Okhotsk

N. V. Astakhova

V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Division, Russian Academy of Sciences, Vladivostok, Russia

E-mail: n_astakhova@poi.dvo.ru

Received July 25, 2007; in final form April 14, 2008

Abstract—Thin mineral grains of nonferrous and precious metals (Ag, Au, Cu, Ni, Pb, Sn, Zn, Sb, Ti, W, Mo,
and Ce) were revealed for the first time by SEM and microprobe studies of polished sections of iron-manganese
crusts from the Sea of Okhotsk. The metals form native and intermetallic compounds; less frequently they form
mineral oxides or sulfides. The conclusion was drawn that the main part of the native minerals represents a
mechanical admixture in the ferromanganese crusts.

DOI: 10.1134/S0001437009030138

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