Email this article The fluid inclusions in «compact» quartz from the Oka-Urik block (Eastern Sayan)
- Authors: Volkova M.G.1, Nepomnyashchikh A.I.1, Fedorov A.M.1
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Affiliations:
- Vinogradov Institute of Geochemistry SB RAS
- Issue: Vol 148, No 3 (2019)
- Pages: 94-101
- Section: Applied mineralogy
- URL: https://journals.eco-vector.com/0869-6055/article/view/10951
- DOI: https://doi.org/10.30695/zrmo/2019.1483.07
- ID: 10951
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Abstract
«Compact» quartz of the Oka-Urik block is a new source of ultra-pure quartz raw materials. Large bodies of «compact» quartz are located in the south-western part of the block. The samples are opaque, gray-white, but translucent in thin chips and have the form of a clouded single crystal of quartz. Quartz grains are slightly elongated in one direction. There are two generations of quartz grains. There are single needles and scales of sericite. A distinctive feature of the «compact» quartz from other quartzites of the Oka-Urik block is that fluid inclusions were widely distributed here inside the quartz grains, and only rarely within intergranular spaces. Size of fluid inclusions is to 40 microns. Three types of fluid inclusions by composition were found in the sample of «compact» quartz: water-salt, water and carbon-containing-water. The concentration of salts in fluid inclusions of water-salt composition corresponds to 7—9 wt % NaCl equiv. Chemical enrichment of quartz concentrates showed that the main part of high-temperature water, carbon dioxide and sodium is in fluid inclusions. Based on the data obtained, an enrichment scheme was proposed. Calcination of quartz grits in vacuum at a temperature of 1450 °C for three hours led to a decrease in sodium concentration, as there is an opening of the fluid inclusions inside the grain.
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About the authors
Maria Gennad’evna Volkova
Vinogradov Institute of Geochemistry SB RAS
Author for correspondence.
Email: mariavolkova2008@yandex.ru
ORCID iD: 0000-0002-4727-7563
SPIN-code: 2108-8410
Scopus Author ID: 11141732500
ResearcherId: J-3442-2018
candidate of geological and mineralogical Sciences, research Laboratory «Geochemistry of ore formation and geochemical methods of prospecting»
Russian Federation, Favorsky str. 1А, Irkutsk, Russia, 664033Aleksandr Iosifovich Nepomnyashchikh
Vinogradov Institute of Geochemistry SB RAS
Email: ainep@igc.irk.ru
ORCID iD: 0000-0001-5291-3432
SPIN-code: 6679-6277
Scopus Author ID: 6602854549
ResearcherId: B-2886-2016
Doctor of physics and mathematics sciences, Professor,
honored scientist of the Russian Federation,
Russian government prize winner, Chief researcher Laboratory "Physics of single crystals"
Aleksandr Mikhailovich Fedorov
Vinogradov Institute of Geochemistry SB RAS
Email: sashaf@igc.irk.ru
ORCID iD: 0000-0002-8719-3305
SPIN-code: 8629-1092
Scopus Author ID: 54895741600
ResearcherId: I-7724-2018
candidate of geological and mineralogical Sciences,
senior researcher Laboratory «Geochemistry of ore formation and geochemical methods of prospecting»
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