Abstract

The paper reports original data on the isotopic composition (δ¹³С, δ¹⁸О) and major and rare earth element (REE) geochemistry of manganese ores in the Rodinauli section of the Kvirila deposit (Georgia). The δ¹³С (V-PDB) and δ¹⁸О (V-SMOW) values vary from –19.6 to –6.6‰ and from 21.1 to 29.1‰, respectively, in the carbonate ores; and from ‒14.9 to ‒5.5‰ and from 21.8 to 28.4‰, respectively, in the carbonate substance of cement of oxide ores. The studied ores are characterized by the presence of negative Ce anomaly ( \({{{\text{Ce}}} \mathord{\left/ {\vphantom {{{\text{Ce}}} {{\text{Ce}}_{{{\text{PAAS}}}}^{*}}}} \right. \kern-0em} {{\text{Ce}}_{{{\text{PAAS}}}}^{*}}}\) up to 0.51) in majority of samples (both carbonate and oxide ores); the prominent Eu anomaly is absent. A conclusion has been made that the ores were formed both under conditions of early diagenesis of sediments and later, during catagenesis, with the participation of metal-bearing elisional solutions.

中文翻译：

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格鲁吉亚克维里拉矿床锰矿石的成因：来自碳和氧同位素组成以及稀土元素地球化学的证据

摘要

该论文报告了Kvirila 矿床 Rodinauli 部分锰矿石的同位素组成（δ ¹³ С、δ ¹⁸ О）以及主要元素和稀土元素 (REE) 地球化学的原始数据。碳酸盐矿石中δ ¹³ С (V-PDB) 和 δ ¹⁸ О (V-SMOW) 值分别为 –19.6 至 –6.6 ‰ 和 21.1 至 29.1 ‰；氧化矿胶结物的碳酸盐物质中分别为-14.9至-5.5‰和21.8至28.4‰。所研究矿石的特征是存在负 Ce 异常 ( \({{{\text{Ce}}} \mathord{\left/ {\vphantom {{{\text{Ce}}} {{\text{Ce}} }}_{{{\text{PAAS}}}}^{*}}}} \right.\kern-0em} {{\text{Ce}}_{{{\text{PAAS}}}}^ {*}}}\)在大多数样品（碳酸盐矿石和氧化物矿石）中高达 0.51）；明显的Eu异常不存在。得出的结论是，矿石是在沉积物早期成岩作用条件下以及后来的还原作用过程中在含金属熔解溶液的参与下形成的。