The metamorphosed differentiated volcanogenic strata of the Aralbai Group have been studied in the eastern part of the Precambrian Ulutau massif of Central Kazakhstan. The U–Th–Pb (SIMS) crystallization age of 757 ± 7 Ma has been obtained for the first time for andesidacites of the Aralbai Group, indicating the formation of these suprasubduction volcanic rocks at the end of the Tonian period of the Neoproterozoic.

中文翻译：

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Ulutau 地块分化火山复合体的晚新元古代：U-Th-Pb (SIMS) 测年结果

在哈萨克斯坦中部前寒武纪乌鲁套地块东部研究了阿拉尔拜群变质分异火山成因地层。首次获得Aralbai群安山岩的U-Th-Pb（SIMS）结晶年龄为757±7 Ma，表明这些超俯冲火山岩形成于新元古代托尼阶末期。