Мінеральні ресурси України (Jun 2015)
Deеp factors of formation of major litium industrial deposits in rare-metal pegmatites of Shpolyano-Tashlyksky ore district of the Ukrainian shield. Article 1
Abstract
General and distinctive features in the distribution, behavior, physical and chemical properties of basic typomorphic elements of rare metal metasomatites of Shpolyano-Tashlyksky ore district, uranium-carbonate-sodium metasomatites of Vatutinskoe ore field and phosphorus-rare-earth-thorium-uranium metasomatites presented in the article. Geological preconditions of their spatial proximity and simultaneous formation in the west wing of border of the Korsun-Novomirgorodsky pluton of Ingulsky megablock of the UkrSh analyzed. Analysis of geochemical specialization of different types of rare metal metasomatic rocks and their enclosing rocks was proposed in the article. Results of this analysis led to the conclusion that the most stable paragenesis of industrial ore concentrations (U for carbonate-sodium metasomatites, Ta-Li for rare metal metasomatites) has superimposed character geochemical specialization in relation to the geochemical specialization of enclosing rock’s complexes. This is evidence about dominant external (depth) source of indicator elements of different industrial ores. Comparative analysis of the geochemical features of elements from ores of industrial uranium deposit in Vatutinskoe ore field, of major deposits of lithium and Li-Ta ores of Polohovskogo and Stankovatskogo ore fields with associated Be, Nb, Rb, Cs, Sn components in ores was made. This led to the conclusion that the individual typomorphic elements in complex ores have common physical and chemical properties, variable valency, common tendency to form complex compounds, common high affinity to oxygen and to fluorine, common ability to inversion and migration forms. Large amount of ore-bearing fluids with typomorphic components may accumulate in local asthenospheric traps under the effects of similar PT-conditions in floor of lithosphere of Ingulsky megablock of high degree of maturity.
