Abstract

The Burgali deposit is located in the Paleozoic Kedon volcanic belt (KVB) within the Omolon cratonic terrane. The orebodies of the Burgali deposit are veined and stockwork-type. The studies of the wallrock metasomatites demonstrate that the erosional truncation of the deposit is close to minimal. The ores of the deposit are enriched in the chalcophile elements (Au, Ag, As, Sb, Te, W, Mo, and Bi) and poor in the rare earths. The rare-earth element (REE) spectra are dominated by light lanthanides. The ores are characterized as very low-sulfidation with finely disseminated mineralization, widespread occurrence of chalcedony, and widespread colloform-banded, often combined with brecciated, structures. The late quartz veins contain Lower Carboniferous coaly siltstone fragments, filled with petrified timber remains, which indicate the Carboniferous age of the ore mineralization. The ores contain widespread Au- and Te-bearing pearceite and rare minerals such as argyrodite and the selenous petrovskaite and uytenbogaardtite. The data obtained enable the Burgali deposit to be classified as low-sulfidation epithermal. The outlook for Ag and Au reserve additions is based on the further studies and exploration of the ore-bearing stockwork.

中文翻译：

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古生代克顿火山带（俄罗斯东北部）的布尔加里超热金银沉积

摘要

Burgali矿床位于Omolon克拉通地层内的古生代Kedon火山岩带（KVB）中。Burgali矿床的矿体呈脉状和储层型。对围岩交代岩的研究表明，该矿床的侵蚀截断几乎是最小的。该矿床的矿石富含亲硫元素（Au，Ag，As，Sb，Te，W，Mo和Bi），稀土元素贫乏。稀土元素（REE）光谱以轻镧系元素占主导。矿石的特征是硫化程度很低，具有细微的矿化作用，广泛存在的玉髓，广泛的带状带状结构（通常与角砾状结构结合）。晚期石英脉中含有石炭纪下层煤质粉砂岩碎屑，里面充满了石化木材残骸，表示矿石成矿的石炭纪。矿石中含有广泛的含金和含Te的白云母以及稀有矿物，如银辉石，硒化的彼得罗夫卡石和钙钛矿。获得的数据使Burgali矿床可以归类为低硫化超热矿床。Ag和Au储量增加的前景基于对含矿储量的进一步研究和探索。