MINERALOGY AND GEOCHEMISTRY OF THE SHUBARKOL DEPOSIT JURASSIC COALS
Аmangeldykyzy А. Kopobayeva А.N. Bakyt А. Ozhigin D.S. Blyalova G.G.
2021National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2021#5Issue 44923 - 31 pp.
This article studies mineralogy of Jurassic coals of the Shubarkol deposit using the method of scanning electron microscopy (SEM-EDX) Hitachi S-3400N that was used at the Uranium Geology International Innovation-scientific Education Center of the Tomsk Polytechnic University Department of Geoecology and Geochemistry. In the course of study, maps of the metal distribution of metals were built in the QGIS program, the content of which was obtained by instrumental neutron activation analysis (INAA) at the nuclear geochemical laboratory of the Department of Geoecology and Geochemistry of National Research Tomsk Polytechnic University (TPU) (analyst A.F. Sudyko). The choice of this object of study was determined by the tasks of research that included studying the regularities of the abnormal concentrations of metals accumulation, the geological environment various factors effect on the levels of their accumulation in coals, as well as the conditions of their concentration and forms in coals. The samples for the study were taken by the channel sampling in the Central and Western sections of the field, as well as by the core method in the Eastern section. According to the results of scanning microscopy, the only scandium-containing mineral particle of complex Si-Al-Ca-Zr-Sc-Ti-O composition (~ 0.66 % Sc) was established. Mineral inclusions of complex composition (Al-Si-Zr-K-Ca-Sc-Ti) with the presence of its analogue Zr in coals were identified, as well as the presence of small grains of zircon and titanium oxides that could be considered as the main concentrators of zirconium and hafnium. The correlation analysis of Nb and Ta in the coals and coal-bearing rocks of the Shubarkol deposit showed a significant correlation between the elements, the highest significant correlation was found with Zr, Hf, Th, Sc and rare earth elements. Celestine was identified as the main mineral form of strontium in the coals of the Shubarkol deposit; Sr-barite was also found that was probably formed during the coals oxidation. Minerals are predominantly of authigenic origin.
Coal , Coal seams , Geochemistry , Hafnium , Mineralogy , Niobium , Scandium , Shubarkol
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Karaganda Technical University, Karaganda, Kazakhstan
Karaganda Technical University
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