Geochemical Peculiarities of Ore-Forming Fluid of the Paleozoic Au—Ag Epithermal Ol'cha Deposit(Northeastern Russia)

摘要

The Au—Ag epithermal Ol'cha deposit is the first Paleozoic deposit discovered in 1966 within the Omo-lon cratonic terrane in Far East Russia. It is located on the Rassoshinskoe uplift, which is a tectonic block elongated in the northeasterly direction with a length of 150 km and a width of 70 km (Fig. 1). The Ol'cha deposit belongs to the Paleozoic Kedonskii volcano-plutonic belt (KVB). The large Au-Ag Kubaka deposit with mined gold (an average content of 20 ppm) and silver resources of ＞1001 each is located in 200 km to the northwest of it, in the KVB as well [1].