The Late Silurian Age of the Reference Aralaul Granosyenites-Granite Massif (Northern Kazakhstan).

This work presents the results of U-Pb geochronological studies of alkaline granites of the Aralaul complex of Northern Kazakhstan, which allow one to substantiate their Late Silurian (420 ± 4 Ma) age. Taking into consideration the previously obtained data, we propose a new development scheme of Paleozoic granitoid magmatism in Northern Kazakhstan, which includes Late Ordovician granite-granodiorite (Zerenda and Krykkuduk), Early Silurian granite-leucogranite (Borovoe and Karabulak), Late Silurian granosyenites-granite (Aralaul), and Early Devonian (Balkashino and Orlinogorsk) complexes. [ABSTRACT FROM AUTHOR]