Gold Placers in a Buried Karst of the Mindyakskaya Intermountain Depression (South Urals)

Abstract

It is shown, that the deep buried karst providing the appropriate conditions for preservation of the gold placers is related to junction of the meridional and northwest active zones of neotectonic dislocation. Lode-placer gold mineralization in the carbonates-volcanite contact of these knodes is accompanied by shear deformation, brecciation, ferruginization, and argillitization. The nuggets obtained after flushing are the dendrites in form along with well-rounded volume gold that testify to a polychronousity and a polygeny of both placer, and ore formations (gold-argillite formation), which are related to one of the stages of the Mesozoic - Cainozoic tectonomagmatic activation of the region.

Keywords

• золото, россыпь, погребенный карст, рудно-россыпной узел, месторождение, межгорная депрессия, Южный Урал.