Abstract
The Zhilnoye ore deposit belongs to the Amguema-Kanchalan metallogenic zone with gold-silver ores of different types in terms of the Ag/Au index. They were formed at various stages of the mineral formation. Studying the pyrite features can be used to understand the formation conditions of the mineral deposits and to improve the methodology of their forecasting within the zone. The objective of the work is to identify the main occurrence forms of pyrite and the pyrite generations and to reconstruct the staging of the mineral formation. As a result, various morphological types and occurrence forms of the pyrite were found (single crystals; rounded grains; zones of massive pyritization; intergrowths; and forms of substitution, corrosion, and transformation) and 5 pyrite generations were identified. Within the ore deposit and the Amguema-Kanchalan zone as a whole, 3 productive stages of the mineral formation took place, of which the silver-gold ores of the Zhilnoye deposit were formed at the silver-sulfide-polymetallic stage.
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