Water-Containing Defects in Variously Deformed Milky-White Vein Quartz of the Larino Deposit (South Urals)
M.A. Korekina1, S.N. Shanina2, A.N. Savichev1, E.A. Pankrushina3, M.V. Shtenberg1, P.S. Morozov4, D.A. Artemiev1
1South Ural Federal Scientific Center of Mineralogy and Environmental Geology, Ural Branch of the Russian Academy of Sciences, Miass, Russia
2Institute of Geology of the Komi Science Center, Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russia
3A.N. Zavaritsky Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia
4South Ural State University, Chelyabinsk, Russia
Keywords: Quartz, IR and Raman spectroscopy, gas chromatography, cataclasis, water
Abstract
The methods of Infrared (IR) and Raman spectroscopy, as well as gas chromatography, were used to assess the distribution, content and composition of water-containing defects in variously deformed milky-white vein quartz of the Larino deposit. Weakly deformed quartz and quartz with intensive polygonization and recrystallization, in which water is present in molecular form, in fractures, channels, intergranular space, as well as in the composition of fluid inclusions, are analyzed. The content of water-containing defects, according to IR spectroscopy and gas chromatography, decreases in a series from weakly deformed primary granular coarse-grained quartz to blocked and recrystallized. The obtained results indicate the release of water during recrystallization, along the newly formed grain boundaries by diffusion and further homogenization to achieve an equilibrium state. Gas content also depends on the degree of deformation changes in samples and decreases from large coarse-grained differences to intensely deformed quartz with a high content of recrystallized grains.
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