The paper presents the results of the study of textural and structural features of ores of the Malinovskoye deposit (South Sikhote-Alin), belonging to the quartz-tourmaline-sulphide formation of Au–Bi type. The geological position and complex composition of ores of the object create favourable conditions for the manifestation of a wide range of textures and structures. It was found that the most common textures are vein-embedded, massive and disseminated, among the identified types of structures are allotriomorphic and hypidiomorphic-grained, hypidiomorphic-metaserrine and porphyroclastic. The characteristic feature is their complex combinations with formation of combined textures and structures. The studies confirm that ore formation at the Malinovskoye deposit occurred in the conditions of hydrothermal-metasomatic process complicated by intensive tectonic deformations. From the technological point of view, ores with massive and vein-embedded textures containing coarse-grained sulphides and free gold are promising for beneficiation. Particular attention should be paid to the control of harmful impurities (As, Sb, clay minerals), which significantly affect the technological process. A differentiated approach to processing different types of ores using combined methods (flotation + cyanidation) is recommended. The results obtained are important for the development of search criteria and evaluation of similar objects with bismuth mineralization, as well as for the optimization of technological schemes of ore processing.
V. N. Bakhtina (Wed,) studied this question.