The Age of Gold Mineralization in the Yana–Kolyma Metallogenic Belt, Northeastern Russia: First Data of Re–Os Isotope Geochronology of Native Gold

Geology, fluid inclusions, mineral and (S-O) isotope chemistry of the Badran orogenic Au deposit, Yana-Kolyma belt, eastern Siberia: implications for ore genesis

“…These events correlate with various tectonic processes on the eastern periphery of the Siberian craton in the Late Jurassic-Early Cretaceous. Isotopic Re-Os estimates of the age of gold (148 and 137 million years) (Fridovsky et al, 2021) coincide with the time of formation of dikes (151-145 million years) and cooling of granitoids of the small intrusions complex (138-137 million years) and reflect two stages of the formation of orogenic gold mineralization of the western part of the YKMB in connection with accretion-collision events on the eastern margin of the Siberian craton. According to the new 40 Ar/ 39 Ar geochronological data, for sericite from alterations, as well as feldspars and plagioclase from dikes of gold ore and gold-antimony deposits of this belt, the interval of 132-123 million years reflects the young tectonothermal processes of the final stage of the formation of gold mineralization .…”

“…Dating of micas ( 40 Ar/ 39 Ar) and native gold (Re-Os) from ore veins of orogenic gold deposits in the western part of the YKMB demonstrate a wide range of tectonothermal events that occurred from 148 to 126 million years Fridovsky et al, 2021;Prokopiev et al, 2018). These events correlate with various tectonic processes on the eastern periphery of the Siberian craton in the Late Jurassic-Early Cretaceous.…”