Slyvna O. Patterns of distribution and material composition of written pegmatites of the Yeliseevsky field (Western Azov, Ukrainian shield)

Thesis is devoted to the identification of patterns of distribution of ornamental varieties of written pegmatite from Yeliseevsky ore field of Western Azov area and the definition of criteria for assessing the quality of raw materials as of semiprecious raw.Written pegmatites are the source of metal-rare-earth mineralization, and quartz to precious stones and also serve as the main raw material for ceramic industry. However, in recent years, it widely used in lapidary and jewelry fields. It is found that written pegmatites Eliseevskoe fields contain 8 ornamental species. The criteria for assessing the quality of written pegmatites was established and identified 4 varietal groups of pegmatites from their use in stone cutting industry. It is established that the value of the field "Beam Great Camp" given the reserves of decorative pegmatites to increases at 9.9 times. The directions of the rational use of ornamental varieties written pegmatites from the studied area have been determined. The regularities of localization and distribution of decorative writing pegmatites from of the Ukrainian shield is offered. Written pegmatites by the combination of geological characteristics, parameters of the technological process, and economic indicators to represent a new type of raw gemstones of non-traditional for Ukraine.