Abstract Carbonates of the Tomtor complex of ultramafic alkaline rocks and carbonatites (the northern part of the Republic of Sakha Yakutia) are distinguished by a wide range of carbon isotopic composition δ 13 C from +2 to –59.9‰. The geological position, localization patterns, mineral and chemical compositions and the relationship with REE mineralization of samples with values of δ 13 C carbonates from –25 to –59‰ are characterized. The formation of abnormally low δ 13 C in carbonates is determined by the biogenic oxidation of methane from δ 13 C met to –70‰.

中文翻译：

---

Tomtor 碳酸岩复合体（北极西伯利亚）岩石中微生物诱导矿化的证据

摘要 超基性碱性岩石和碳酸盐岩的 Tomtor 复合体（萨哈雅库特共和国北部）的碳酸盐以碳同位素组成 δ 13 C 范围广泛为特征，从 +2 到 –59.9‰。对δ 13 C 碳酸盐值从–25 到–59‰ 的样品的地质位置、定位模式、矿物和化学成分以及与稀土矿化的关系进行了表征。碳酸盐中异常低的 δ 13 C 的形成是由甲烷从 δ 13 C 达到 –70‰ 的生物氧化作用决定的。