Geology and minerageny of the Bestobe deposit (Central Kazakhstan)

IF 0.8 Q4 METALLURGY & METALLURGICAL ENGINEERING
N. Askarova, V. S. Portnov, G. Blyalova, R. Madisheva, V. Dyakonov
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Abstract

Polygenic stratiform deposits are the largest in the world in terms of barite and manganese reserves, as well as lead and zinc reserves. In the mineral resource complex of the Republic of Kazakhstan, they are of great importance and are distinguished as an independent genetic Atasu type. In the article, the deposits of the Zhailma graben-syncline in a large riftogenic structure are considered as a reference for the Atasu type. The geological structure of the Bestobe stratiform polymetallic deposit located in the eastern part of the Zhailma synclinorium is presented. The stratigraphy of ore formations, mineralization features, morphology of the ore body and the pattern of zoning the distribution of elements in the ore-bearing rocks of the Bestobe deposit are shown. A feature of the deposit is the combination of layered iron-manganese and lead-zinc ores and superimposed zinc-lead-barite mineralization; the sharply subordinate role of hydrothermal-sedimentary ores in the total reserves of lead and zinc; comparative abundance of lead, copper and silver sulfosalts. The analysis of the materials indicates that mineralization at the Bestobe deposit is complex. Its main value is polymetallic ores. The role of iron ore mineralization of the deposit is insignificant. Manganese mineralization is practically absent. Polymetallic ores are conventionally subdivided into lead-zinc-barite, lead-barite, barite and lead-zinc. Strontium is a constant impurity in barites. Lead is mainly concentrated in galena; its insignificant amount is found in geocronite, boulangerite, jamsonite, bournonite, cerussite, anglesite, pyromorphite, plumboyarosite. The bulk of zinc is concentrated in the form of sphalerite.
哈萨克斯坦中部赠与矿床地质与矿物学特征
就重晶石和锰储量以及铅和锌储量而言,多成因层状矿床是世界上最大的。在哈萨克斯坦共和国的矿产资源复合体中,它们非常重要,被认为是一种独立的遗传阿塔苏类型。本文认为,大裂陷构造中的寨马地堑-向斜矿床可作为阿塔苏型矿床的参考。介绍了位于寨马向斜东段的贝贝层状多金属矿床的地质构造。给出了该矿床的成矿地层、成矿特征、矿体形态及含矿岩中元素的分带分布规律。矿床特征为层状铁锰、铅锌矿结合,锌铅重晶石成矿叠加;热液沉积型矿石在铅锌总储量中的急剧从属作用;相对丰富的铅,铜和银硫酸盐。物质分析表明,贝贝矿床成矿作用复杂。其主要价值是多金属矿。铁矿对矿床的成矿作用不显著。锰矿化几乎不存在。多金属矿通常分为铅锌重晶石、铅重晶石、重晶石和铅锌。锶是重晶石中不变的杂质。铅主要富集在方铅矿中;在年轮岩、粉辉石、钾辉石、硼辉石、铜辉石、角辉石、焦闪石、铅辉石中均有少量。大部分锌以闪锌矿的形式富集。
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