The Use of Typomorphic Features of Placer Gold of the Anabar Region for Determining Its Sources

Typomorphic features of placer gold the Anabar region were studied as predictive-exploration criteria. The target study was to determine typomorphic related intermediate sources (paleo-placers) and supposed nearby primary ore occurrences. Two varieties identified. first variety is well-rounded high-fineness lamellar with a highly modified internal structure. This native associated sources, Neogene–Quaternary watershed pebble beds. second type includes slightly rounded wide variation in fineness (494‰–999‰). Its indicator block heterophase set this indicates vicinity source, what prerequisite for constructing prospecting traverses order find As result these studies, hydrothermal-metasomatic formations gold-sulfide mineralization main substrate them fractured near-fault carbonate rocks Cambrian Vendian–Cambrian age. Along this, hydrothermalites developed on cemented fine-pebble quartz conglomerates Middle Permian age found core exploration wells. types metasomatic are identified: quartz-potassium feldspar jasperoid. minerals galena pyrite, different ratios by sites revealed. Gold identified form small particles siliceous formations. lithological factor one leading favorable factors formation due presence permeable terrigenous rocks. structural control occurrences determined their localization Mayat–Logoy Dogoy–Kuoy faults Molodo–Popigay system discontinuous faults. We assume two-stage occurrences: during stage, components hydrothermal-sedimentary ores near-gault zones formed. stage processes Mesozoic tectonic-magmatic activation, when intrusion basite dikes initiated mobilization formed zone silicic-potassic metasomatosis