GEOLOGY AND MINERALOGY OF CARBONATITES OF LINEAR-CRACKED TYPE IN MAYKE ORE OCCURRENCE OF MAYATAS ORE REGION (NORTH ULYTAU)

The relevance of the research consists in detailed mineralogical studies with a focus on electron probe microanalysis provide information on the composition of ores and the form of occurrence of noble metals (platinum groups), rare and rare earth elements, which can significantly affect the economic value of the Mayke ore occurrence. The main aim of the research is to determine the distribution and forms of occurrence of noble, rare-earth and rare metals in multicomponent copper-pyritic ores of Mayke occurrence. Objects: linear-cracked type metasomatites and pyrite-copper ore on the right bank of the Mayke River in the Mayatas ore region. Methods. The composition of copper pyrite ores and rock-forming minerals of metasomatites was studied in the laboratories of mineralogy and physics-chemical researches of the Institute of Geological Sciences named after K.I. Satpayev (Almaty) using an INCA ENERGY dispersive spectrometer, OXFORD INSTRUMENTS. Atomic emission semi-quantitative spectral analysis, X-ray diffractometric and thermal analyzes were carried out. Results. The paper considers the main criteria of petrography and mineralogy of metasomatites of linear-cracked type and genetically associated copper-pyrites, first identified within the Mayatas ore region. It is proved that the main ore bodies of copper pyrites are localized in quartz-rutile-siderite-chlorite and siderite-muscovite-chlorite schists, which are an integral part of the silicite-carbonate-carbon complex. Based on the detailed mineralogical studies, it was shown that copper-pyrite ores are sources of platinoids, rare earth elements and rhenium. The violarite, pyrite, sphalerite, pyrrhotite, microinclusions of cobaltin, nickel cobaltin, ferrocobaltin, gersdorfite, silver telluride, acanthite, lead telluride, galena, testibiopalladite, bismuthistite, are identified in the composition of copper-pyrite ores of Mayke occurrence. It is shown that zonal nickel cobaltin is a source of platinoids (Pt, Ir, Ru, Rh, Os) that form multicomponent solid solutions. Rhenium is a component of sulfides of copper, iron, nickel, lead and bismuth. Tellurium was found in silver telluride, lead telluride, testibiopalladite, melonite and wavrinite. Erbium is found in non-zonal nickel-containing cobaltin and violarite. Cadmium is found as an isomorphic impurity only in sphalerite. The elements of cerium (light – La, Ce, Pr, Nd, Sm) subgroups and Y are included in the composition of phosphates, fluorophosphates and are