Accessory Minerals of the Galmoenan Mafic-Ultramafic Massif, Koryak Upland, Kamchatka

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.