Abstract
This paper presents the results of a study of the Vesely carbonatite occurrence in a new carbonatite-bearing area of northern Transbaikalia. The REE patterns, oxygen and carbon isotope compositions of carbonates and magnetites, and strontium isotope composition of dolomite allow us to classify the rocks as carbonatites. This study focused on minerals from xenoliths that were identified as mantle-derived on the basis of structure and mineral composition. The compositions of Cr-bearing chlorite, phengite, magnetite, rutile, ilmenite, and titanite are reported. Aggregates of closely intergrown magnetite and rutile occurring in the xenoliths resemble exsolution structures. A possible origin of these aggregates is discussed.
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B. R. Frost and D. H. Lindsley, “Occurrence of Iron-Titanium Oxides in Igneous Rocks,” in Oxide Minerals: Petrologic and Magnetic Significance, Rev. Mineral. 25, 433–468 (1991).
Yu. A. Bagdasarov, “Geochemical Features of Magnetites from Carbonatites and Other Rocks of the Chernigov Zone, Azov Region,” Dokl. Akad. Nauk SSSR 252, 208–212 (1982).
Yu. A. Bagdasarov, “Chromium Geochemistry in the Rocks of Carbonatite Complexes,” Geol. Rudn. Mestorozhd, No. 36, 85–89 (1981).
S. A. Gallii, V. M. Krochuk, and S. A. Kozak, “Genetic Features of Magnetite from Carbonatites of the Ukrainian Shield,” Mineral. Zh. 4(2), 85–89 (1982).
S. Massone and W. Schreyer, “Stability Field of the High-Pressure Assemblage talc-phengite and Two New Phengite Barometers,” Aur. J. Mineral. 1, 391–410 (1989).
A. R. Woolley and R. C. Kemp, “Carbonatites: Nomenclature, Average Chemical Composition, and Element Distribution,” in Carbonatites: Genesis and Evolution (Unwin Hyman, London, 1989), pp. 1–14.
D. K. Bailey, “Carbonatite Magmas,” J. Geol. Soc. (London) 150, 637–651 (1993).
Yu. A. Bagdasarov and I. P. Ilunin, “Coexisting Ilmenites and Ti-Magnetites in a Kimberlite Matrix,” Dokl. Akad. Nauk SSSR 290, 945–948 (1986).
V. I. Gerasimovskii and A. I. Polyakov, “Geochemistry of the Volcanic Rocks of the East African Rift Zones,” in East African Rift System (Nauka, Moscow, 1964), Vol. 3, pp. 5–194 [in Russian].
A. R. Woolley and A. A. Church, “Carbonatite Petrogenesis Evidence from the Known Occurrences of Extrusive Carbonatite,” in Proceedings of 32th International Geological Congress, Rio de Janeiro, Brazil, 2000 (Rio de Janeiro, 2000), G0605004.
A. P. Jones, T. Kostola, F. Stoppa, and A. R. Woolley, “Petrography and Mineral Chemistry of Mantle Xenoliths in a Carbonate-Rich Melilitic Tuff from Mt. Vulture Volcano, Southern Italy,” Mineral. Mag. 64, 593–613 (2000).
E. R. Neuman, E. Wulff-Pedersen, N. J. Pearson, and E. A. Spenser, “Mantle Xenoliths from Tenerife (Canary Islands): Evidence for Reactions between Mantle Peridotites and Silicic Carbonatite Melts Including Ca Metasomatism,” J. Petrol. 43, 825–857 (2002).
A. R. Woolley, W. C. Barr, V. K. Din, et al., “Extrusive Carbonatites from the Uyaynah Area, United Arab Emirates,” J. Petrol. 32, 1143–1167 (1991).
Yu. A. Bagdasarov, “Typochemistry of Magnetites from Carbonatites of Different Formational Types and Depth Facies,” in Proceedings of 4th All-Union Mineralogical Seminar, Dushanbe, USSR, 1986 (Dushanbe, 1986), pp. 223–224 [in Russian].
S. E. Haggerty, “Oxide Mineralogy of the Upper Mantle,” in Oxide Minerals: Petrologic and Magnetic Significance, Rev. Mineral. 25, 355–416 (1991).
N. L. Dobretsov and A. V. Tatarinov, Jadeite and Nephrite in Ophiolites (Nauka, Novosibirsk, 1983) [in Russian].
N. L. Dobretsov, N. V. Sobolev, V. S. Shatskii, et al., Eclogites and Glaucophane Schists in Fold Areas (Nauka, Novosibirsk, 1989) [in Russian].
D. H. Lindsley, “Experimental Studies of Oxide Minerals,” in Oxide Minerals: Petrologic and Magnetic Significance, Rev. Mineral. 25, 69–106 (1991).
M. J. Powncely and M. J. Fisher-White, “Phase Equlibria in the Systems Fe2O3-MgO-TiO2 and FeO-MgO-TiO2 between 1173 and 1473 K, and Fe2+-Mg Mixing Properties of Ilmenite, Ferrous-Pseudobrookite and Ulvospinel Solid Solutions,” Contrib. Mineral. petrol. 135, 198–211 (1999).
S. Akimoto, T. Nagata, and T. Katsura, “The FiFe2O5-Ti2FeO5 Solid Solution Series,” Nature 179, 37–38 (1957).
D. H. Lindsley, “Iron-Titanium Oxides,” Carnegie Inst. Washington Yearbook, No. 64, 144–148 (1965).
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Original Russian Text © G.S. Ripp, N.S. Karmanov, A.G. Doroshkevich, M.V. Badmatsyrenov, I.A. Izbrodin, 2006, published in Geokhimiya, 2006, No. 4, pp. 437–444.
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Ripp, G.S., Karmanov, N.S., Doroshkevich, A.G. et al. Chrome-bearing mineral phases in the carbonatites of northern Transbaikalia. Geochem. Int. 44, 395–402 (2006). https://doi.org/10.1134/S0016702906040069
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DOI: https://doi.org/10.1134/S0016702906040069