Abstract
The present communication is focused on inclusions in topaz from the Mokrusha pegmatite deposit, Urals. These inclusions are intergrown fine crystals of manganocolumbite, cassiterite and a mineral compositionally corresponding to niobium tungstate with minor Mn, Ta, and Fe. Electron microprobe and X-ray diffraction study has revealed that this mineral is identical to that previously described by A. V. Voloshin et al. (1997) in granite pegmatites of the Southwestern Pamir Mountains, Tajikistan. The crystal chemical formula of the mineral is (Mn2.02F0.98)Σ3.00(Nb2.296Ta0.640Ti0.062)Σ3.00(Nb1.04Mn0.960)Σ2.00(W1.343Nb0.664)Σ2.00O20.
Similar content being viewed by others
REFERENCES
Bulakh, A.G., Rukovodstvo i tablitsy dlya rascheta formul mineralov (Guide and Tables for the Calculation of Mineral Formulas, Moscow: Nedra, 1967.
Granite pegmatites. Vol. 3. The Miarolic Pegmatites, Zagorsky, V. E. Peretyazhko, I. S., and Smakin B. M., Eds., Novosibirsk: Nauka, 1999.
Kotova, M.I., Nesterov, A.P., Ponomareva, N.I., Inclusions in Topaz from the Mokrusha Deposit (Urals, Russia)), Mineralogicheskie muzei (Mineralogical Museums), St. Petersburg, 2005.
Popov, V.A., Popova, V.I., Kanonerov, A.A., Borsch, S.K., and Demochkin, V.P., Mineralogiya granitnykh pegmatitov Alabashskogo polya Samotsvetnoi polosy Urala (Mineralogy of Granitic Pegmatites of the Algabashka Field in the Semiprecious Band of the Urals), Miass: 1999.
Popova, V.I., Popov, V.A., and Kanonerov, A.A., Murzinka: Alabashka pegmatite field, Mineral. Al’manakh, 2002, vol. 5, p. 128.
Talantsev, A.S., Kamernye pegmatite Urala (Chamber Pegmatites of the Urals), Moscow: Nauka, 1988.
Voloshin, A.V., Pakhomovsky, Ya.A., Bahchisaraysev, A.Yu., Pushcharovsky, D.Yu., and Jamova, N.A., Chemical composition of koragoite from granitic pegmatites of south-western Pamirs, Tajikistan, Dokl. Earth Sci., 1997, vol. 353, no. 4, pp. 516–518.
Wiliamson, B.J., Stanley, C.J., and Wilkinson, J.J., Implications from inclusions in topaz for greisenization and mineralization in the Hensbarrow topaz granite, Cornwall, England, Contrib. Mineral. Petrol., 1997, vol. 127, nos. 1–2, pp. 119–128.
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by I. Baksheev
Rights and permissions
About this article
Cite this article
Ponomareva, N.I., Gordienko, V.V., Antonov, A.V. et al. Inclusions of Koragoite in Topaz from Pegmatites of the Mokrusha Deposit, Urals, Russia. Geol. Ore Deposits 61, 803–808 (2019). https://doi.org/10.1134/S1075701519080099
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1075701519080099