MINERALOGICAL FEATURES OF THE ORE GOLD OF THE BILLYAKH MELANGE ZONE OF THE ANABAR SHIELD

Mineralogical features of ore gold, extracted from the crushed sample of a substantially quartz rock with inclusions of potassium feldspar and plagioclase grains of the Billyakh melange zone of the Anabar Shield have been studied in detail for the first time. The ore mineralization is represented by chalcocite, bornite, chalcopyrite, Au, Ag, Cu, and Pb tellurides. Native gold is characterized by medium to high fieneness and impurity elements: Hg (to 0.2%) and Cu (0.4-7.87%). It has been established that its main part consists of symplektitic intergrowths with Au tellurides – calaverite and krennerite. Inclusions of chalcocite, bornite, altaite, tellurovismuthite, rickardite, petzite, and clausthalite have been identified in these intergrowths. Discovery of low-temperature gold-telluride association in mineral parageneses of mineralized rocks and as inclusions in native gold suggests the identification of products of the late epithermal stage of the gold-copper-porphyry system. Based on the study of mineral inclusions in placer gold, genetic link of autochtonous gold placers, identified at the Khaptasynnakh site, with explored ores is proved.