DBPapers
DOI: 10.5593/SGEM2014/B11/S1.019

GEOLOGICAL AND ECONOMIC EVALUATION OF QUARTZ FROM THE REPUBLIC OF KARELIA, RUSSIA

V. Shchiptsov, L. Scamnitskaya, T. Bubnova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-07-0 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 1, 153-160 pp

ABSTRACT

Quartz is a mineral widely used nowadays. High purity quartz is a very rare form of quartz. The main ways of applicaions for the production of high-pure and ultra-pure quartz concentrates are technical silicon, ferrosilicium, quartz grit, crystals, polysilicon, silicons, aluminium, steel, fused silica, brewing quartz, pezoelektronika, monocrystalline silicon, multicrystalline silicon, light engineering, semiconductors, optics, crucibles, fiber optics, glass, building materials, sitall, ceramics, solar panels. As rule, The IOTA QUARTZ is being used in the manufacture. For successful high purity raw quartz resource identification detailed analysis and appropriate process technology selection is essential. The Republic of Karelia, Russia, is part of the Karelian-Kola quartz-bearing province. The geological evolution and formation of certain geological-facies complexes are responsible for the distinctive features of quartz occurring as big mesostructures such as the Belomorian mobile belt, the Karelian craton and the Svecofennian domain. The pegmatitic, silexitic, veined, quartzitic and pebbly geological and industrial types of quartz were identified. The characteristic mineralogical, petrographic and geochemical features of various genetic types of quartz units were revealed. Special attention was given to analysis of trace elements, structural impurities and microinclusions (mineral and fluid) as an essential typomorphic feature responsible for the technological properties of quartz. Analysis of the various types of Karelian quartz as raw materials, differing in the percentage of trace elements, on the most essential characteristics of quartz, has revealed the purest raw material – recrystallized granulated veined quartz and intensely recrystallized veined quartz. However, the latter is most heavily saturated with gas. Big gas-liquid inclusions (GLI) can be removed by technological conversion. Small GLIs in quartzites are most difficult to remove. Quartz, containing finely dispersed mineral impurities, and bitumens which are not removed upon enrichment are hard to enrich. An integrated approach to the study of the typomorphic properties of various types of quartz makes it possible not only to describe the characteristics of the initial raw material but also to predict the quality of quartz concentrates. The Republic of Karelia is a promising region for common and high-quality quartz production.

Keywords:quartz, genetic type, typomorphism, high-purity concentrates

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