Abstract The present paper presents new U–Pb and Sm–Nd age data obtained for granulites of the Cheremshanskaya Unit enclosing metamorphosed volcano-sedimentary sulfide ores, in which sulfur isotope mass-independent fractionation (MIF–S) was established. Zircons from orthotectites that cut hosted paragranulites yielded aconcordant U–Pb age of 1866.8 ± 7.6 Ma, reflecting the final stage of granulite metamorphism. The model age ( Т ND (DM)) of ~3.0 Ga obtained for graphite–sulfide–cordierite (±Bt) and garnet–biotite–orthopyroxene paragneisses indicates that the protolith of sedimentary rocks was formed in the Mesoarchaean. As evidenced from various sources, the Sm–Nd isotopic characteristics of orthotectites differ from those of paragneisses.

中文翻译：

---

Cheremshanskaya 单元（Sharyzhalgai 隆起，西伯利亚克拉通，俄罗斯）的花岗岩时代：新数据

摘要 本文提出了新的 U-Pb 和 Sm-Nd 年龄数据，这些数据是从 Cheremshanskaya 单元中的麻粒岩中获得的，这些麻粒岩包含变质火山沉积硫化物矿石，其中建立了与硫同位素质量无关的分馏 (MIF-S)。切割寄主的副麻粒岩的正沸石锆石产生一致的 U-Pb 年龄为 1866.8 ± 7.6 Ma，反映了麻粒岩变质作用的最后阶段。为石墨-硫化物-堇青石 (±Bt) 和石榴石-黑云母-斜辉石共片麻岩获得的~3.0 Ga 的模型年龄 (Т ND (DM)) 表明沉积岩的原岩形成于中古宙。正如各种来源所证明的那样，正沸石的 Sm-Nd 同位素特征与副片麻岩不同。