Neoproterozoic volcanosedimentary and plutonic complexes of Northern Ulutau (Central Kazakhstan)

The article presents the results of studying and substantiating the age of Late Precambrian volcanogenic sedimentary and plutonic complexes of the northern part of the Ulutau terrane (Northern Ulutau) in the west of Central Kazakhstan. The age estimates obtained (SHRIMP II, ID-TIMS, LA-ICP-MS) indicate the formation of acidic effusions and granitoids in the second half of the Tonian Neoproterozoic period ~835‒747 million years ago. Geochronological and isotope-geochemical data allow us to consider these formations as analogues of stratified and plutonic complexes of Southern Ulutau, formed in various parts of the lateral series of structures of the late precambrian active continental margin.