Abstract For the first time, the isotopic composition of oxygen, the content of trace elements, and the U–Pb zircon age were determined for kyanite–gedrite metasomatites from the Dyadina Gora ore occurrence, Belomorian Mobile Belt, Fennoscandian Shield. The zircon cores preserved from the protolith are characterized by a magmatic REE distribution and an average value of δ 18 O of about 3.0‰, and their age is close to 2400 Ma. The inner zones around the cores and rims of zircon were formed during metasomatic processes at the time of the Svecofennian metamorphism about 1870–1880 Ma ago, experienced strong fluid reworking, and are characterized by a decreased δ 18 O value to –0.9‰.

中文翻译：

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Belomorian 移动带 Dyadina Gora 矿区含刚玉交代岩的锆石中氧的异常同位素组成

摘要 首次测定了来自 Dyadina Gora 矿区、Belomorian Mobile 带、Fennoscandian Shield 的蓝晶石-红长石交代岩的氧同位素组成、微量元素含量和 U-Pb 锆石年龄。原岩保存的锆石核具有岩浆稀土分布特征，δ 18 O平均值约为3.0‰，年龄接近2400 Ma。锆石核缘周围的内带形成于约1870-1880 Ma前Svecofennian变质期的交代过程中，经历了强烈的流体改造，其特征是δ 18 O值降低至–0.9‰。