The joint Vendian-Riphean reservoir in the Yurubcheno-Tokhomskaya zone (YuTZ) of the Siberian Platform has resulted from hydrothermal activity. Prediction of the HC-prospective fields in the VendianRuphean deposits is based on revealing the zones of hydrothermal activity conductive to cavern and pore formation in the fractured carbonate series. Quartz-associated ankerites are indicator minerals for oil- and gas-saturated dolomites.
