Abstract

A group of accessory ore minerals is revealed in rocks of the Galmoenan mafic-ultramafic massif (Koryak Upland, Kamchatka, Russia), represented by native metals (iron, copper, zinc, and silver), iron-nickel and cobalt-iron intermetallic compounds, sulfides (pentlandite, cobaltpentlandite, pyrrhotite, sphalerite, heazlewoodite, millerite, shandite, pyrite, chalcopyrite, and Cu3S2 phase), arsenides (maucherite, nicolite, orcelite, and modderite), and some other minerals. Their chemical compositions, crystal forms, and paragenetic associations are described. Formation of these minerals is attributed to serpentinization of rocks.

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