Abstract

Palladium mineralization was registered in the Kola superdeep borehole (SG-3) for the first time in samples from deep horizons (in the fault zone at ~10 km). A proper palladium mineral (merenskyite) with the formula Pd_1.00(Te_1.21Bi_0.79)_2.00 was detected using the analytical electron microscopy and EBSD methods. The unusually high content of bismuth in the discovered merenskyite crystal most likely indicates the lower temperatures of its formation from a bismuth-rich fluid. This is supported by numerous finds of associated bismuth minerals (native and intermetallic minerals, sulfides, tellurides, and sulfotellurides) as well. A close geochemical association of noble and rare elements was revealed in the composition of the rich and diverse ore mineralization in the samples studied. It can be argued that a new type of mineralization was discovered for the SG-3 rocks: noble metal (Au–Ag–Pd) rare-element (Bi–Te).

中文翻译：

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科拉超深钻孔深地层钯矿化的发生

摘要

钯矿化首次在 Kola 超深钻孔 (SG-3) 的深层样品中（在约 10 公里的断层带中）记录。一种合适的钯矿物（merenskyite），公式为 Pd _1.00 (Te _1.21 Bi _0.79 ) _2.00使用分析电子显微镜和 EBSD 方法检测。发现的美伦斯基晶体中铋含量异常高，这很可能表明其由富含铋的流体形成的温度较低。这也得到了大量伴生铋矿物（天然和金属间矿物、硫化物、碲化物和磺基碲化物）的发现的支持。在所研究的样品中丰富多样的矿石矿化的组成中揭示了贵重元素和稀有元素的密切地球化学关联。可以说，SG-3 岩石发现了一种新的矿化类型：贵金属（Au-Ag-Pd）稀有元素（Bi-Te）。