“Invisible” gold of mineralized zones of Southern Primorye (the ore occurrence Sukhoe)

Abstract

In the south of the Russian Far East, a new promising type of mineral sources has been identified – zones of streaked-interspersed mineralization, where the gold is in a dispersed form. The main features of mineralogy and geochemistry of ore formations are determined. It was found out that gold is presented in an “invisible” form, concentrating mainly in arsenopyrite and arsenic pyrite. To reconstruct the conditions of ore formation, the isotopic composition of sulfur of these sulfides was studied. The obtained data open up new opportunities for revaluation of the prospects of the raw material base of precious metals of Primorye.