Precious Metals in Black Shales of the Baltic Basin (Leningrad Oblast)

IF 0.8 4区 工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY
V. I. Vyalov, E. P. Shishov, T. A. Dyu, A. V. Nastavkin
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Abstract

This article presents the results of studies on the noble metal contents of the Paleozoic dictyonema shales of the Baltic sedimentary basin. On the territory of the studied Kaibolovo–Gostilitsy prospecting area, high, up to potentially industrial, concentrations of noble platinum group metals (PGMs), comparable with the concentrations in sedimentary ore types taken into account by the State Balance of Mineral Reserves of the Russian Federation, have been confirmed with a large factual material (more than 600 shale samples). Increased gold and silver contents have also been noted. Palladium predominated in the composition of platinum group metals. The article presents the identified features of the PGM distribution over the area and in the section of the shale-bearing sedimentary strata. Precious metals in the dictyonema shales of the Baltic basin are distributed in the shales in the following forms: in terrigenous scattered finely dispersed native minerals (forms), in impurities in sulfide minerals (mainly in pyrite), and in species localized in the organic matter (Ag and partly Au). The conditions of formation of precious metal mineralization in the dictyonema shales have been reconstructed. The source of precious metals were rocks of the provenance area—the Baltic Shield—and seawater of the ancient sedimentation area, a supplier of a number of rare metals deposited on the geochemical reducing barrier of the dictyonema shales. Increased and stable concentrations of precious metals in combination with large-scale (billions of tons) geological resources of the dictyonema shales indicated the possible presence of a large unconventional mineral resource base of precious metals in the Baltic region of Russia.

Abstract Image

波罗的海盆地(列宁格勒州)黑色页岩中的贵金属
本文介绍了波罗的海沉积盆地古生代双柱状页岩中贵金属含量的研究结果。在已研究的Kaibolovo-Gostilitsy探矿区境内,贵重铂族金属(PGMs)的浓度很高,甚至可能达到工业水平,可与俄罗斯联邦国家矿产储量平衡所考虑的沉积矿石类型的浓度相媲美,这已得到大量事实材料(600多个页岩样品)的证实。金和银的含量也有所增加。铂族金属中钯占主导地位。本文介绍了该区和含页岩沉积地层剖面上PGM分布的识别特征。波罗的海盆地双叶式页岩中的贵金属在页岩中的分布形式有:陆源分散的细分散的原生矿物(形态)、硫化物矿物中的杂质(主要以黄铁矿为主)和有机质中的定域种(银和部分金)。重建了二叠统页岩中贵金属成矿作用的形成条件。贵金属的来源是物源区(波罗的海盾区)的岩石和古沉积区的海水,它们是沉积在地球化学还原屏障上的一些稀有金属的供应者。贵金属浓度的增加和稳定,加上dictyonema页岩的大规模(数十亿吨)地质资源,表明在俄罗斯波罗的海地区可能存在一个大型的非常规贵金属矿物资源基地。
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来源期刊
Solid Fuel Chemistry
Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS
CiteScore
1.10
自引率
28.60%
发文量
52
审稿时长
6-12 weeks
期刊介绍: The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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