Epithermal Ag‒Au mineralization of the Televeem volcanic uplift (Central Chukotka)

The article considers the geological, mineralogical and geochemical features of the Au–Ag epithermal mineralization of the Televeem volcanic uplift (VU), which complicates the Upper Pykarvaamsky volcanotectonic depression (VTD), the Central Chukchi sector of the Okhotsk-Chukchi volcanic belt (OCHVB). The structure of the ore occurrence is due to its localization within the eponymous VU. The main vein zone (MVZ) of the Televeem ore occurrence, up to 500 m wide, stretches in the meridional direction for 2.5 km. Along the stretch of the MVZ, the kulis-shaped converging quartz-adular veins are successively replaced by zones of fine veining and breccation in secondary quartzites and gossan. The gold content in these formations varies from 1.4 to 17.3 g/t, silver – from 7.6 to 144.6 g/t. Breccia, frame-plate, geode and fine-veined textures are widely developed in the ores. The main ore minerals are pyrite, arsenopyrite, acanthite, freibergite-tetrahedrite, stephanite, polybasite, low-grade native gold (249–532‰), titanite. The amount of ore minerals in veins usually does not exceed 0.5%, in rare cases it reaches 3%. According to mineralogical data, the ore occurrence can be classified as weakly or moderately eroded. Weak erudition suggests a high probability of detecting ore bodies that do not come to the surface.