U–Pb (ID TIMS) Age of Garnet from Nepheline Syenites of the Yakokutsky Volcano-Plutonic Complex: A New Reference Estimate of Age for Mesozoic Alkaline Magmatism Event of the Aldan Shield

The results of U‒Pb geochronological studies of calcium garnet from nepheline syenites of the Yakokutsky volcano-plutonic complex (the Aldan Shield) are presented. The garnet age is 131 ± 1 Ma and is consistent with the previously obtained age estimates for garnet from kalsilitic ijolites and pyroxene-microcline pegmatites of the Murunsky massif. The results of these studies demonstrate the potential of garnet for reference age estimates of high-K alkaline rocks.