Zagnitko V.M.¹, Shunko V.V.¹, Kvasnytsia I.V.¹, Sydorchuk V.S.²
1 – Taras Shevchenko National University of Kyiv, Educational-Research Institute «Institute of Geology»
2 – M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the National Academy of Sciences of Ukraine
Language: Ukrainian
Geochemistry and ore formation 2016, 37: 59-64
https://doi.org/10.15407/gof.2016.37.059
The results of detailed study of quartz crystals of hydrothermal veins in Bohuslav type granitoids of Paleoproterozoic Umansky complex, which were found in a quarry of Deshky village (near Bohuslav , Rosynsko-Tikytskiy megablock of Ukrainian Shield) are shown. Observed features of morphological types of quartz crystals (the presence of phantoms, the emergence of secondary generation of small quartz crystals, the scepter-like shapes) indicate the unstable conditions of the mineral formation. According to fluid-inclusion microthermometry study the crystallization of quartz occurred from the low-temperature (175-190 °С) aqueous solutions, which have heterogeneous condition (aqueous solution + vapor). Indicated gel-like substance was preserved in the inclusion at a temperature of about 177 °С.
Keywords: quartz crystals, Umansky complex, granitoids, crystal morphology , fluid inclusions.
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