Abstract
The topography of various faces of quartz crystals indicates that the late growth of rock crystals occurred at a relatively slow rate, by the layer by layer mechanism activated by screw dislocations. The capture mechanism of gas-liquid inclusions by quartz at the deposit is identified, and gas-liquid and solid inclusions are examined in various quartz populations. The temperature of the mineral-forming processes is evaluated from the homogenization temperatures of the inclusions. Distinct quartz populations are determined to be formed under similar physicochemical conditions, at temperatures no higher than 260°C, which increased from earlier to later quartz populations. The quartz veins were produced by solutions of sodic-hydrocarbonate composition. The geochemical environment in which mineral-forming processes occurred at the Zhelannoe deposit was generally poor in fluid, and the inclusions are dominated by water and usually contain no more than 10 wt % carbon dioxide, strongly subordinated amounts of nitrogen and carbon monoxide, and no identifiable methane amounts.
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Original Russian Text © N.V. Sokerina, N.N. Piskunova, 2011, published in Geokhimiya, 2011, Vol. 49, No. 2, pp. 192–202.
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Sokerina, N.V., Piskunova, N.N. Growth condition of quartz crystals at the Zhelannoe deposit in the Nether-Polar Urals: Evidence from fluid and solid inclusions. Geochem. Int. 49, 181–190 (2011). https://doi.org/10.1134/S0016702911020091
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DOI: https://doi.org/10.1134/S0016702911020091