PETROGRAPHIC AND MINERALOGICAL FEATURES OF THE KARAGAILY-AKTAS RARE METAL DEPOSIT (SOUTH KAZAKHSTAN REGION)

Baisalova A.O. Dolgopolova A.V. Seltmann R. Akbarov E.E. Mashrapova M.А.
September-October 2024 National 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
2024 #2024-September-October Issue 5 6 - 22 pp.

This article examines tin-tungsten-lithium mineralization associated with the magmatic, postmagmatic and volcanogenic-sedimentary stages, provides a general description of mineral composition of grazenized, albitized granites of the Karagaily-Aktas deposit (South Kazakhstan region). Petrographic characteristics and mineral composition of intrusive rocks were studied using a polarization microscope, X-ray diffraction diffractometer DRONE-3, scanning electron microscopy (Zeiss EVO 15LS SEM), and microprobe analysis (CAMECA-100). The main rare metal minerals are represented by wolframite, molybdenum, cassiterite, zinnwaldite, lepidolite and scheelite, monazite and xenotime. The rock-forming minerals include quartz, feldspar (sodium and potassium), muscovite, hornblende and biotite, sphenes, rutile, zircon, apatite and fluorite are present in the form of accessory minerals. Geochemical studies have shown that granites, syenites, pegmatites and greysens, as well as host carbonate rocks, are enriched in rare and radioactive elements such as Ta, Nb, W, Li, Be, Rb, Zr, Hf, Y, Yb, Sb, Sr, Ce, La, Er, Ho, Dy, Gd, Sm, Pr, Ce. Given the current demand for rare metals, especially lithium, and rare-earth elements, the development of the Karagaily-Aktas deposit can become economic.

granite , greisen , Karagaily-Aktas , lithium , pegmatite , rare-earth elements , South Kazakhstan , tin , tungsten

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K.I. Satbayev Kazakh National Research Technical University, Almaty, Kazakhstan
Natural History Museum, London, United Kingdom
Institute of Geological Sciences named after K.I.Satbayev, Almaty, Kazakhstan

K.I. Satbayev Kazakh National Research Technical University
Natural History Museum
Institute of Geological Sciences named after K.I.Satbayev

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