Endogenic Gold Occurrences in the Sedimentary Cover of the Voronezh Anteclise

Ultrafine gold was found in more than 100 samples from a sedimentary cover of the Voronezh Anteclise during a geological survey. The Au content varies from hundreds to 3.8 g/m3, and the particle size is a few tens of micrometers with a thickness of 1–2 µm. The higher Au content is confined to sandy–clayey rocks from various stratigraphic levels. The chemical composition of native gold is characterized by a high amount of volatiles (Hg, As, S, Bi, etc.) with dominant Hg (up to 13