Paragenetic Association of Platinum and Gold Minerals in Placers of the Anabar River in the Northeast of the Siberian Platform

Areal placers of diamond and precious metals (platinum gold) unknown origin are widespread in the Anabar River basin on northeastern part Siberian Platform. This article discusses typomorphic features palladium gold (porpezite) ferroan platinum, which, addition to fragmented individual grains, sometimes form close growths, which indicates their obvious genetic relationship. can be used delimit primary sources commercial components complex by types. The composition minerals was determined a Camebax-Micro (Cameca, France) microprobe analyzer, microstructural relationships were studied using scanning microscope JSM-6480LV JEOL. Determination structure parameters elementary lattices carried out D8 Discover diffractometer. According analysis, Pd content porpezite ranges from 0.73% 12.83%, Ag does not exceed 2.75% Cu reaches 3–4%. Considering composition, such gold–platinum mineral association river is Gulinsky massif, as well Au–PGE ore occurrences related ultramafic–mafic intrusions other regions world. Complex gold–platinum-metal mineralizations usually closely parent rocks often observed sulfide chromite ores layered with metasomatic hydrothermal transformations. It shown that cases platinum magmatogenic paragenesis coexist until separation solutions magma, rule, transports Au small fraction PGE fluid-ore-magmatic system accordance model formation gold–porphyry deposits. Within diamond-bearing region, according modern geophysical data, significant number local gravimagnetic anomalies associated presence intrusive massifs basic alkaline-ultrabasic cover within basement have been identified. allows us assume buried Au–Pt may located both Precambrian Phanerozoic strata.