Zapiski RMO (Proceedings of the Russian Mineralogical Society)Zapiski RMO (Proceedings of the Russian Mineralogical Society)0869-60552658-4352The Russian Academy of Sciences1275310.30695/zrmo/2019.1482.07Research ArticleIntergrowths of corundum and spinel from the Thurein-Taung deposit (Myanmar)MuromtsevaA. V.muranna19@gmail.comPonomarevaN. I.n_ponomareva@mail.ruBocharovV. N.muranna19@gmail.comZilichevaO. M.muranna19@gmail.comInstitute of Earth Sciences, Saint Petersburg State UniversityResearch Park of the Saint Petersburg State UniversityInstitute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry RAS21052019148210011421052019Copyright © 2019, Russian academy of sciences2019<p>The article displays data on formation conditions and features of unique corundum-spinel aggregates from the Thurein-Taung deposit in Myanmar (Burma). Chemical composition of corundum and spinel is given, and there is traced the effect of iron admixture on the coloring of spinel and parameters of its crystal lattice on the base of X-ray diffraction analysis. The surface of corundum on contact with spinel was studied in detail with aid of the color cathodoluminescence;it is shown that the process of overgrowing by spinel was preceded by resorption of corundum surface. Mineral and fluid inclusions in these minerals have been studied with use of microprobe analysis and the Raman spectroscopy. The temperatures of homogenization have been determined for liquid carbon dioxide in fluid inclusions inside corundum. On the base of mineral equilibria analysis in the AlMgOCO<sub>2</sub>H<sub>2</sub>SC system there were determined the optimal activities of magnesium and calcium and the fugacity of carbon dioxide. They are equal to<em>а</em><sub>Mg</sub>=10<sup>5</sup>;<em>а</em><sub>Ca</sub>=10<sup>1</sup>and<em>f</em><sub>CO</sub><sub>2</sub>=10<sup>4</sup>. It was found that corundum-spinel aggregates formed at temperature about 400С as aresult of partial dissolution of corundum protocrystal by high-temperature solutions containing Mg and Ca. Crystallization of the spinel took place with increasing pH (3.5) and adecrease of redox potential (Eh0.3V).</p>corundumspinelintergrowthsconcretionaggregateRaman spectroscopycathodoluminescence colorThurein-Taung depositformation conditionsfluid inclusionsmineral inclusionsкорундшпинельсрастанияконкрецияагрегатрамановская спектроскопиякатодолюминесценцияцветная катодолюминесценцияместорождение Турейн-Таунгусловия образованияфлюидные включенияминеральные включения[American Museum of Natural History / Ruby Land: The Gems and Geology of Myanmar’s Mogok Stone Tract. - AMNH, 2014. https://www.amnh.org/explore/news-blogs/from-the-field-posts/ruby-land-a-museum-expedition-to-mogok, free.][Bulakh A. G., Krivovichev V. G. Calculation of mineral equilibria. Moscow: Nedra, 1985. 318 p. (in Russian).][Dufur M. S., Koltsov A. B., Zolotarev A. A., Kuznetsov A. B. Corundum-bearing metasomatic rocks in the Central Pamirs. Petrology. 2007. Vol. 15. N 2. Р. 151-177.][Ermakov N. P., Dolgov Yu. A. Thermobarogeochemistry. Moscow: Nedra, 1979. 271 p. (in Russian).][Garrels R. M., Christ C. L. Solutions, minerals, and equilibria. New York: Harper and Row, 1965. 450 p.][Glikin A. E., Sinai M. U. Morphological and genetic classification of crystal substitution products. Zapiski RMO (Proc. Russian Miner. Soc.). 1991. N 1. P. 3-17 (in Russian).][Krasnova N. I., Petrov T. G. Genesis of mineral individuals and aggregates. Saint Petersburg: Nevsky Courier, 1997. 228 p. (in Russian).][Mitchell A. Geological Belts, Plate Boundaries, and Mineral Deposits in Myanmar. Amsterdam: Elsevier, 2017. 524 p.][Naumov G. B., Ryzhenko B. N., Khodakovskii I. L. A handbook of thermodynamic quantities. Moscow: Atomizdat, 1971. 238 p. (in Russian).][Piznjur A. V. Basics of thermobarogeochemistry. Lviv: Lviv University, 1986. 199 p. (in Russian).][Imashuku S., Onо K., Shishido R., Suzuki S., Wagatsuma K. Cathodoluminescence analysis for rapid identification of alumina and MgAl2O4 spinel inclusions in steels. Mater. Charact., 2017. Vol. 131. P. 210-216.][Themelis T. Gems and Mines of Mogok. Bangkok: Private Ed. T. Themelis, 2008. 352 p.][Yakovenko V. V. Isotope-geochemical systematics of corundums and their genesis. Vladivostok: FEB RAS, 2013. 22 p. (in Russian).][Zhilicheva O. M. Luminescent properties of minerals from pulsed cathodoluminescence data. PhD diss. syn. Moscow, 2010. 25 p. (in Russian).]