Abstract

Data on geology of bauxite deposits associated with rich iron ores of the weathering crust of Precambrian ferruginous-siliceous shale formation within the Kursk Magnetic Anomaly (KMA) are summarized. High -grade iron ores and bauxites occur under a predominantly Paleozoic sedimentary cover at depths of over 400 m. The main potential of iron–aluminum raw materials in the region is concentrated in Bolshetroitskoe, Vislovskoe, Olimpiyskoye and Melikhovo-Shebekinskoe deposits. Bauxite and ferralite deposits were formed during pre-Visean time after phyllitic shales of Yakovlev and Korobkovsky Formations. They consist mainly of boehmite with hematite impregnation, often with a significant admixture of kaolinite and chlorite. Average content (%) is usually Al₂O₃ ~50.1, SiO₂ ~6.0, Fe_tot. ~14.0. The total bauxite potential of KMA is 1201.7 mln t (P₁ + C₁ + C₂ + B). Subsurface mining even with small projected capacity of 1.0–2.5 mln t/year would cover the deficit of alumina presently covered through import.

中文翻译：

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KMA的Pre-Visean铝土矿和铁铝矿床及开发前景

摘要

总结了与库尔斯克磁异常 (KMA) 内前寒武纪铁质-硅质页岩地层风化壳的富铁矿相关的铝土矿矿床地质数据。高品位铁矿石和铝土矿出现在超过 400 m 深度的主要古生代沉积覆盖层下。该地区铁铝原材料的主要潜力集中在 Bolshetroitskoe、Vislovskoe、Olimpiyskoye 和 Melikhovo-Shebekinskoe 矿床。在 Yakovlev 和 Korobkovsky 组的千页岩页岩之后，铝土矿和铁铁矿矿床是在前维赛时期形成的。它们主要由浸渍赤铁矿的勃姆石组成，通常含有大量高岭石和绿泥石。平均含量（%）通常为Al ₂ O ₃ ~50.1、SiO ₂~6.0, Fe _tot。〜14.0。KMA 的总铝土矿潜力为 12.017 亿吨（P ₁ + C ₁ + C ₂ + B）。即便是 10-250 万吨/年的小规模地下开采，也可以弥补目前通过进口弥补的氧化铝短缺。