Abstract
The geological and isotopic age of the deposits in gold-sulfide-quartz and gold-silver formations of the Gonzhinsky gold ore center in the Amur gold-bearing province is considered. The formation of the gold-sulfide-quartz deposits of Pioneer, Anatolyevskoye, and Alexandra is paragenetically associated with the Burindinsky monzodiorite complex of intrusions and dikes, with the estimated potassium-argon age of 92-116 Myr; the isotopic age of the Burindinsky complex diorite array was established by the U-Pb method by zircons as 117.8 ± 2.6 Myr within the Aptian stage of the Early Cretaceous. For gold-silver deposits (Pokrovskoye, Burinda), a paragenetic relationship of gold-silver mineralization with a complex of subvolcanic intrusions and dikes of the Early Cretaceous Taldan complex has been established. They were formed at the subvolcanic level and belong to the Barremian time. The Rb-Sr age of the most productive Pokrovsky gold-silver deposit is 131 ± 12 Myr.
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